Friday, July 31, 2020

2010 Cadillac Truck SRX AWD V6-3.0L Page 168

2010 Cadillac Truck SRX AWD V6-3.0L Page 168



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC B0083 01



- Left Front Impact Sensor Short to Battery



DTC B0083 02



- Left Front Impact Sensor Short to Ground



DTC B0083 04



- Left Front Impact Sensor Open



DTC B0083 05



- Left Front Impact Sensor High/Voltage Open



DTC B0083 0C



- Left Front Impact Sensor Low Current



DTC B0083 39



- Left Front Impact Sensor Internal Electronic Failure



DTC B0083 3A



- Left Front Impact Sensor Incorrect Component Installed



DTC B0083 71



- Left Front Impact Sensor Invalid Serial Data Received



DTC B0084 01



- Right Front Impact Sensor Short to Battery



DTC B0084 02



- Right Front Impact Sensor Short to Ground



DTC B0084 04



- Right Front Impact Sensor Open



DTC B0084 05



- Right Front Impact Sensor High/Voltage Open



DTC B0084 0C



- Right Front Impact Sensor Low Current



DTC B0084 39



- Right Front Impact Sensor Internal Electronic Failure



DTC B0084 3A



- Right Front Impact Sensor Incorrect Component Installed



DTC B0084 71



- Right Front Impact Sensor Invalid Serial Data Received



DTC B0085 01



- Left Front Side Impact Sensor Short to Battery



DTC B0085 02



- Left Front Side Impact Sensor Short to Ground



DTC B0085 04



- Left Front Side Impact Sensor Open



DTC B0085 05



- Left Front Side Impact Sensor High/Voltage Open

2010 Cadillac Truck SRX AWD V6-3.0L Page 662

2010 Cadillac Truck SRX AWD V6-3.0L Page 662



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Testing



1. Ignition OFF, disconnect the harness connector at the appropriate B51 headlamp leveling sensor.



2. Test for less than 5 ohm between the low reference circuit terminal 3 and ground.



瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K28



headlamp leveling control module.



3. Ignition ON, test for 4.8-5.2 V between the 5V reference circuit terminal 1 and ground.



瀚慖f less than the specified range, test the 5V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,



replace the K28 headlamp leveling control module.



瀚慖f greater than the specified range, test the 5V reference circuit for a short to voltage. If the circuit tests normal, replace the K28 headlamp



leveling control module.



4. Verify the appropriate scan tool Leveling Position Sensor parameter is 0 V.



瀚慖f greater than the specified range, test the signal circuit terminal 2 for a short to voltage. If the circuit tests normal, replace the K28



headlamp leveling control module.



5. Install a 3 A fused jumper wire between the signal circuit terminal 2 and the 5V reference circuit terminal 1. Verify the appropriate scan tool



Leveling Position Sensor parameter is greater than 5 V.



瀚慖f less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the



K28 headlamp leveling control module.



6. If all circuits test normal, replace the B51 headlamp leveling sensor.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Headlamp Leveling Front Suspension Height Sensor Replacement (See: Lighting and Horns/Headlamp/Service and Repair/Removal and



Replacement/Headlamp Leveling Front Suspension Height Sensor Replacement)



* Headlamp Leveling Rear Suspension Height Sensor Replacement (See: Lighting and Horns/Headlamp/Service and Repair/Removal and



Replacement/Headlamp Leveling Rear Suspension Height Sensor Replacement)



* Control Module References (See: Testing and Inspection/Programming and Relearning) for headlamp leveling control module replacement,



setup, and programming



B3531



DTC B0223, B022A, B0233, B023A, B0408, B0418, B0428, or B3531



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptor



DTC B0223 01



- Recirculate Position Command 1 Circuit Short to Battery



DTC B0223 06



- Recirculate Position Command 1 Circuit Low Voltage/Open



DTC B022A 01



- Recirculate Position Command 2 Circuit Short to Battery



DTC B022A 06



- Recirculate Position Command 2 Circuit Low Voltage/Open

2010 Cadillac Truck SRX AWD V6-3.0L Page 497

2010 Cadillac Truck SRX AWD V6-3.0L Page 497



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC B1735 02



- Driver Seat Front Up Switch Circuit Short to Ground



DTC B1740 02



- Driver Seat Front Down Switch Circuit Short to Ground



DTC B1745 02



- Driver Seat Rear Up Switch Circuit Short to Ground



DTC B1750 02



- Driver Seat Rear Down Switch Circuit Short to Ground



DTC B1755 02



- Driver Seat Assembly Forward Switch Circuit Short to Ground



DTC B1760 02



- Driver Seat Assembly Rearward Switch Circuit Short to Ground



DTC B1815 02



- Driver Seat Recline Forward Switch Circuit Short to Ground



DTC B1820 02



- Driver Seat Recline Rearward Switch Circuit Short to Ground



Diagnostic Fault Information



Circuit/System Description



The seat memory control module supplies a reference voltage to each signal circuit of the driver seat adjuster switch. When the power seat switches



are pressed, the appropriate signal circuit from the seat memory control module is pulled low through the switch contacts indicating the power seat



command. The seat memory control module then commands the driver seat to move in response to the switch signals.



Conditions for Running the DTC



* DTC B1325 must not be present.



* Module battery voltage must be between 9 - 16 V.



Conditions for Setting the DTC

2010 Cadillac Truck SRX AWD V6-3.0L Page 936

2010 Cadillac Truck SRX AWD V6-3.0L Page 936



- HO2S Circuit High Voltage Bank 1 Sensor 2



DTC P0151



- HO2S Circuit Low Voltage Bank 2 Sensor 1



DTC P0152



- HO2S Circuit High Voltage Bank 2 Sensor 1



DTC P0157



- HO2S Circuit Low Voltage Bank 2 Sensor 2



DTC P0158



- HO2S Circuit High Voltage Bank 2 Sensor 2



DTC P2A00



- HO2S Circuit Closed Loop Performance Bank 1 Sensor 1



DTC P2A03



- HO2S Circuit Closed Loop Performance Bank 2 Sensor 1



Diagnostic Fault Information



Typical Scan Tool Data



Circuit/System Description



The heated oxygen sensors (HO2S) are used for fuel control and catalyst monitoring. Each HO2S compares the oxygen content of the surrounding



air with the oxygen content of the exhaust stream. When the engine is started, the control module operates in an Open Loop mode, ignoring the



HO2S signal voltage while calculating the air-to-fuel ratio. While the engine runs, the HO2S heats up and begins to generate a voltage within a



range of 0-1,275 mV. Once sufficient HO2S voltage fluctuation is observed by the control module, Closed Loop is entered. The control module



uses the HO2S voltage to determine the air-to-fuel ratio. An HO2S voltage that increases toward 1,000 mV indicates a rich fuel mixture. An HO2S



voltage that decreases toward 0 mV indicates a lean fuel mixture.



The heating elements inside each HO2S heat the sensor to bring the sensor up to operating conditions faster. This allows the system to enter Closed



Loop earlier and the control module to calculate the air-to-fuel ratio sooner.

2010 Cadillac Truck SRX AWD V6-3.0L Page 591

2010 Cadillac Truck SRX AWD V6-3.0L Page 591



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptor



DTC B2657 02



- Ignition Switch Halo Lamp Circuit Short to Ground



Diagnostic Fault Information



Circuit/System Description



The body control module (BCM) supplies a voltage reference through the backlight dimmer switch, which is part of the headlamp switch. When the



dimmer switch is placed in a desired brightness position, reference voltage is applied through the backlight dimmer switch to the BCM. The BCM



interprets this voltage signal, then applies a pulse width modulated (PWM) voltage through the backlight lamp control circuit. This will illuminate



the ignition mode switch halo lamp.



Conditions for Running the DTC



* The ignition is ON.



* The headlamps or park lamps are ON.



Conditions for Setting the DTC



The BCM detects a short to ground on the ignition switch halo lamp control circuit.



Action Taken When the DTC Sets



The BCM will not illuminate the ignition switch halo lamp.



Conditions for Clearing the DTC



* The condition responsible for setting the DTC no longer exists.



* A history DTC will clear once 100 consecutive malfunction ignition cycles have occurred.



Reference Information



Schematic Reference



Interior Lights Dimming Schematics (See: Diagrams/Electrical Diagrams/Lighting and Horns/System Diagram/Interior Lights Dimming



Schematics)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)



Description and Operation



Interior Lighting Systems Description and Operation (See: Lighting and Horns/Description and Operation/Interior Lighting Systems)



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)

2010 Cadillac Truck SRX AWD V6-3.0L Page 1294

2010 Cadillac Truck SRX AWD V6-3.0L Page 1294



6T70/6T75 - Automatic Transmission



DTC P0218



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptor



DTC P0218



- Transmission Fluid Overtemperature



Circuit/System Description



The primary source of heat in the transmission is the torque converter. Hot oil exits the torque converter through the torque converter clutch (TCC)



control valve and flows to the transmission cooler supply line. The supply line connects to the cooler, which is in the radiator. From the cooler, the



oil returns through the oil cooler return line and enters the lubrication circuits. After lubricating the internal components, the oil returns to the oil



pan. The transmission fluid temperature (TFT) sensor is located in the control solenoid valve assembly.



Conditions for Running the DTC



* The ignition voltage is 8.6 volts or greater.



* The TFT is -39 to +149掳C (-38 to +300掳F) for 5 seconds.



Conditions for Setting the DTC



The TFT is 140掳C (284掳F) or greater for 1 minute.



Action Taken When the DTC Sets



DTC P0218 is a Type C DTC.



Conditions for Clearing the DTC



DTC P0218 is a Type C DTC.



Diagnostic Aids



The driver information center (DIC), if equipped, will display 'TRANSMISSION HOT- Idle Engine' when the TFT reaches 132掳C (270掳F). The



TFT on the scan tool should rise steadily to a normal operating temperature, and then stabilize. Ask about the customer's driving habits, trailer



towing, etc. Trailer towing should occur in D4. Ensure the engine cooling system is functioning normally.



Reference Information



Schematic Reference



* Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams)



* Park - Engine Running (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and Operation/6T70/6T75 -



Automatic Transmission/Park - Engine Running)



* Fluid Passages (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and Operation/6T70/6T75 - Automatic



Transmission/Fluid Passages)



Description and Operation



* Transmission General Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and



Operation/6T70/6T75 - Automatic Transmission/Transmission General Description)



* Transmission Indicators and Messages (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and



Operation/6T70/6T75 - Automatic Transmission/Transmission Indicators and Messages)



DTC Type Reference



Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code



(DTC) Type Definitions)

Thursday, July 30, 2020

2010 Cadillac Truck SRX AWD V6-3.0L Page 1173

2010 Cadillac Truck SRX AWD V6-3.0L Page 1173



DTC P0133, P013A-P013F, P014A, P014B, P0153, P1133, or P1153 (LF1)



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC P0133



- HO2S Slow Response Bank 1 Sensor 1



DTC P013A



- HO2S Slow Response Rich to Lean Bank 1 Sensor 2



DTC P013B



- HO2S Slow Response Lean to Rich Bank 1 Sensor 2



DTC P013C



- HO2S Slow Response Rich to Lean Bank 2 Sensor 2



DTC P013D



- HO2S Slow Response Lean to Rich Bank 2 Sensor 2



DTC P013E



- HO2S Delayed Response Rich to Lean Bank 1 Sensor 2



DTC P013F



- HO2S Delayed Response Lean to Rich Bank 1 Sensor 2



DTC P014A



- HO2S Delayed Response Rich to Lean Bank 2 Sensor 2



DTC P014B



- HO2S Delayed Response Lean to Rich Bank 2 Sensor 2



DTC P0153



- HO2S Slow Response Bank 2 Sensor 1



DTC P1133



- HO2S Insufficient Switching Bank 1 Sensor 1



DTC P1153



- HO2S Insufficient Switching Bank 2 Sensor 1



Diagnostic Fault Information

2010 Cadillac Truck SRX AWD V6-3.0L Page 1170

2010 Cadillac Truck SRX AWD V6-3.0L Page 1170



- HO2S Circuit Low Voltage Bank 1 Sensor 2



DTC P0138



- HO2S Circuit High Voltage Bank 1 Sensor 2



DTC P0151



- HO2S Circuit Low Voltage Bank 2 Sensor 1



DTC P0152



- HO2S Circuit High Voltage Bank 2 Sensor 1



DTC P0157



- HO2S Circuit Low Voltage Bank 2 Sensor 2



DTC P0158



- HO2S Circuit High Voltage Bank 2 Sensor 2



DTC P2A00



- HO2S Circuit Closed Loop Performance Bank 1 Sensor 1



DTC P2A03



- HO2S Circuit Closed Loop Performance Bank 2 Sensor 1



Diagnostic Fault Information



Typical Scan Tool Data



Circuit/System Description



The heated oxygen sensors (HO2S) are used for fuel control and catalyst monitoring. Each HO2S compares the oxygen content of the surrounding



air with the oxygen content of the exhaust stream. When the engine is started, the control module operates in an Open Loop mode, ignoring the



HO2S signal voltage while calculating the air-to-fuel ratio. While the engine runs, the HO2S heats up and begins to generate a voltage within a



range of 0-1,275 mV. Once sufficient HO2S voltage fluctuation is observed by the control module, Closed Loop is entered. The control module



uses the HO2S voltage to determine the air-to-fuel ratio. An HO2S voltage that increases toward 1,000 mV indicates a rich fuel mixture. An HO2S



voltage that decreases toward 0 mV indicates a lean fuel mixture.

2010 Cadillac Truck SRX AWD V6-3.0L Page 773

2010 Cadillac Truck SRX AWD V6-3.0L Page 773



Note: The following wheel speed sensor test is polarity sensitive. The wheel speed sensor can be permanently damaged if the polarity is reversed



during the test.



1. Ignition OFF, disconnect the harness connector at the appropriate B5 wheel speed sensor.



2. Connect a 3 A fused jumper wire between the signal terminal 1 and 12 V.



3. Connect a DMM set to read DC amperage between the low reference terminal 2 and ground.



4. Spin the wheel very slowly, test for a DC current switching between a low value of 4-8 mA and a high value of 11-16 mA.



瀚慖f not within the specified range, replace the B5 wheel speed sensor.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Front Wheel Speed Sensor Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Wheel Speed



Sensor/Service and Repair/Front Wheel Speed Sensor Replacement)



* Rear Wheel Speed Sensor Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Wheel Speed



Sensor/Service and Repair/Rear Wheel Speed Sensor Replacement)



* Control Module References (See: Testing and Inspection/Programming and Relearning) for EBCM replacement, setup and programming



C0045



DTC C0035, C0040, C0045, or C0050



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptor



DTC C0035 06



- Left Front Wheel Speed Sensor Circuit Low Voltage/Open



DTC C0035 0F



- Left Front Wheel Speed Sensor Circuit Signal Erratic



DTC C0035 18



- Left Front Wheel Speed Sensor Circuit Low Signal Amplitude



DTC C0035 5A



- Left Front Wheel Speed Sensor Circuit Not Plausible



DTC C0040 06



- Right Front Wheel Speed Sensor Circuit Low Voltage/Open



DTC C0040 0F



- Right Front Wheel Speed Sensor Circuit Signal Erratic



DTC C0040 18



- Right Front Wheel Speed Sensor Circuit Low Signal Amplitude



DTC C0040 5A



- Right Front Wheel Speed Sensor Circuit Not Plausible



DTC C0045 06



- Left Rear Wheel Speed Sensor Circuit Low Voltage/Open



DTC C0045 0F



- Rear Wheel Speed Sensor Circuit Signal Erratic



DTC C0045 18



- Left Rear Wheel Speed Sensor Circuit Low Signal Amplitude

2010 Cadillac Truck SRX AWD V6-3.0L Page 1324

2010 Cadillac Truck SRX AWD V6-3.0L Page 1324



Circuit/System Testing



1. Verify the integrity of the entire air induction system including all turbocharger components by inspecting for the following conditions:



* Any damaged components



* Intake air pressure and temperature sensor damage



* A buildup of contamination, snow or ice at the BARO port on the ECM



* Loose or improper installation



* An air flow restriction



* Any vacuum leak



* Any type of air leak between the turbocharger and the throttle body



* An exhaust leak



瀚慖f a condition is found, repair as necessary.



2. Ignition OFF, disconnect the harness connector at the B65 intake air pressure and temperature sensor.



3. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 5 ohm



between the low reference circuit terminal 1 and ground.



瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20



ECM.



4. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 3 and ground.



瀚慖f less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,



replace the K20 ECM.



瀚慖f greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.



5. Verify the scan tool Boost Pressure Sensor parameter is greater than 250 kPa (36.3 psi).



瀚慖f less than the specified range, test the signal circuit terminal 4 for a short to ground. If the circuit tests normal, replace the K20 ECM.



6. Install a 3 A fused jumper wire between the signal circuit terminal 4 and the low reference circuit terminal 1. Verify the scan tool Boost



Pressure Sensor parameter is less than 1 kPa (0.15 psi).



瀚慖f greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal,



replace the K20 ECM.



7. If the circuits test normal, test or replace the B65 intake air pressure and temperature sensor.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Turbocharger Pressure Sensor Replacement () for intake air pressure and temperature sensor replacement



* Control Module References (See: Testing and Inspection/Programming and Relearning) for engine control module replacement, setup, and



programming



P0237



DTC P0236, P0237, or P0238



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC P0236



- Turbocharger Boost System Performance



DTC P0237



- Turbocharger Boost Sensor Circuit Low Voltage

2010 Cadillac Truck SRX AWD V6-3.0L Page 666

2010 Cadillac Truck SRX AWD V6-3.0L Page 666



Reference Information



Schematic Reference



Instrument Cluster Schematics (See: Diagrams/Electrical Diagrams/Instrument Panel, Gauges and Warning Indicators/System Diagram/Instrument



Cluster Schematics)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)



Description and Operation



Driver Information Center (DIC) Description and Operation (See: Instrument Panel, Gauges and Warning Indicators/Description and



Operation/Driver Information Center (DIC))



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Verification



Ignition ON, observe the scan tool Driver Information Center Switch parameter, that when the S78 Turn Signal/Multi-Function Switches Menu,



Up, Down Set/Clr are pressed and released the scan tool parameter toggles between Menu, Up, Down, Clear and Inactive.



Circuit/System Testing



1. Ignition OFF, disconnect the X2 harness connector at the S78 Turn Signal/Multi-Function Switch.



2. Ignition ON, test for 4.8-5.2 V between the signal circuit terminal 5 and ground.



瀚慖f less than the specified range, test the signal circuit for a short to ground. If the circuit tests normal replace the P16 Instrument Cluster.



瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal replace the P16 Instrument



Cluster.



3. Test for B+ between the signal circuit terminal 12 and ground.



瀚慖f less than the specified value, test the signal for a short to ground or an open/high resistance. If the circuit tests normal replace the P16



Instrument Cluster.



4. Install a 5 A fused jumper wire between the signal circuit terminal 12 and the low reference circuit terminal 6. Verify the scan tool Driver



Information Center Switch parameter displays 0 V.



瀚慖f not the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal replace the P16 Instrument



Cluster.



5. If all circuits tests normal, test or replace the S78 Turn Signal/Multi-Function Switch.



Component Testing



Static Test



1. Ignition OFF, disconnect the harness connectors at the S78 Turn Signal/Multi-Function Switch.



2. Test for 8.8-9.0k ohm between the signal terminal 12 X2 and the low reference circuit terminal 6 X2.



瀚慖f not within the specified range, replace the S78 Turn Signal/Multi-Function Switch.



3. Test for 550-650 ohm between the signal terminal 12 X2 and the low reference circuit terminal 6 X2 while pressing the Up switch.



瀚慖f not within the specified value, replace the S78 Turn Signal/Multi-Function Switch.



4. Test for 1.5-1.7k ohm between the signal terminal 12 X2 and the low reference circuit terminal 6 X2 while pressing the Down switch.



瀚慖f not within the specified value, replace the S78 Turn Signal/Multi-Function Switch.

2010 Cadillac Truck SRX AWD V6-3.0L Page 1057

2010 Cadillac Truck SRX AWD V6-3.0L Page 1057



(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)



Description and Operation



Camshaft Actuator System Description (See: Powertrain Management/Computers and Control Systems/Description and Operation/Camshaft



Actuator System)



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)



DTC Type Reference



Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code



(DTC) Type Definitions)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Special Tools



J 35616-200 - Test Lamp Kit



Diagnostic Aids



* The engine oil condition has a major impact on the camshaft actuator system.



* A low oil level condition may set this DTC. The engine may require an oil change. Inquire with the customer when the last oil change was



performed. You may also monitor the scan tool Engine Oil Life parameter. Advise the customer an oil change may be required.



* Inspect the engine for any recent engine mechanical repairs. An incorrectly installed camshaft, camshaft actuator, or timing chain can cause



this DTC to set.



Circuit/System Verification



Note: The engine oil level and the oil pressure are critical to the correct operation of the camshaft position actuator system. Verify that the



engine has the correct oil level and the correct oil pressure before continuing with this diagnostic.



1. Ignition ON, observe the scan tool DTC information. Verify that none of the following DTCs are set. DTC P0016, P0017, P0018, P0019,



P0335, P0336, P0338, P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, P0393, P0521, P0522, P0523,



P0638, P2100, P2101, P2102, P2103, or P2119.



瀚慖f any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code



Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle) for further diagnosis.



2. Engine idling, command the appropriate Camshaft Position Actuator from 0 degrees to 40 degrees and back to zero while observing the



appropriate scan tool Camshaft Position Variance parameters. The Camshaft Position Variance should be less than 2 degrees in each of the



commanded states.



3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the



conditions that you observed from the Freeze Frame/Failure Records data.



Circuit/System Testing



1. Ignition OFF, disconnect the harness connector at the appropriate Q6 Camshaft Position Actuator Solenoid Valve.



2. Ignition ON, load test for B+ between the ignition circuit terminal 1 and ground.



瀚慖f less than the specified range, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal



and the ignition circuit fuse is open, test all the components connected to the ignition circuit and replace as necessary.



Note: Use the J 35616-200 - Test Lamp Kit for this test. If the J 35616-200 - Test Lamp Kit is not available, use a test lamp that measures



greater than 20 ohm.



3. Connect a test lamp between the control circuit terminal 2 and B+.



Note: The voltage must be measured at the control side of the circuit.

Wednesday, July 29, 2020

2010 Cadillac Truck SRX AWD V6-3.0L Page 1075

2010 Cadillac Truck SRX AWD V6-3.0L Page 1075



DTC P0161



- HO2S Heater Performance Bank 2 Sensor 2



Diagnostic Fault Information



Typical Scan Tool Data



Circuit/System Description



Heated oxygen sensors (HO2S) are used for fuel control and post catalyst monitoring. Each HO2S compares the oxygen content of the surrounding



air with the oxygen content in the exhaust stream. The HO2S must reach operating temperature to provide an accurate voltage signal. A heating



element inside the HO2S minimizes the time required for the sensors to reach operating temperature. Voltage is provided to the heater by an



ignition voltage circuit through a fuse. With the engine running, ground is provided to the heater by the HO2S heater low control circuit through a



low side driver within the engine control module (ECM). The ECM uses pulse width modulation (PWM) to control the HO2S heater operation to



maintain a specific HO2S operating temperature range.



Conditions for Running the DTC



P0030, P0036, P0050, or P0056



* The ignition 1 voltage is between 11-18 V.



* The engine speed is greater than 400 RPM.



* The DTCs run continuously when the above conditions are met.



P0053, P0054, P0059, or P0060



* DTCs P0112, P0113, P0117, P0118, or P2610 are not set.



* The engine run time is greater than 20 s.



* The ignition voltage is less than 18 V.



* The ignition is OFF for greater than 8 h.



* The engine coolant temperature (ECT) is between -30 to +45掳C (-22 to +113掳F) at engine start-up.



* The ECT and the intake air temperature (IAT) are within 8掳C (14掳F) at engine start-up.



* The DTCs run once per drive cycle when the above conditions are met.

2010 Cadillac Truck SRX AWD V6-3.0L Page 477

2010 Cadillac Truck SRX AWD V6-3.0L Page 477



* The DTC will clear if the fault does not return after 50 consecutive ignition cycles.



* The DTC will clear when run state of charge is greater than or equal to 80 percent.



Reference Information



Schematic Reference



Starting and Charging Schematics (See: Starting and Charging/Diagrams/Electrical Diagrams)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)



Description and Operation



Charging System Description and Operation (See: Starting and Charging/Charging System/Description and Operation)



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Verification



Refer to Battery Electrical Drain/Parasitic Load Test (See: Starting and Charging/Testing and Inspection/Component Tests and General



Diagnostics/Battery Electrical Drain/Parasitic Load Test).



B1529



DTC B1405, B1529, or B257B



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC B1405 02



- Control Module Voltage Reference Output 2 Circuit Short to Ground



DTC B1405 03



- Control Module Voltage Reference Output 2 Circuit Low Voltage



DTC B1405 07



- Control Module Voltage Reference Output 2 Circuit High Voltage



DTC B1529 03



- Control Module Voltage Reference Output 5 Circuit Low Voltage



DTC B1529 07



- Control Module Voltage Reference Output 5 Circuit High Voltage



DTC B257B 03



- Lighting Control Switch Signal Low Voltage



DTC B257B 07



- Lighting Control Switch Signal High Voltage

2010 Cadillac Truck SRX AWD V6-3.0L Page 1372

2010 Cadillac Truck SRX AWD V6-3.0L Page 1372



Circuit/System Description



The engine control module (ECM) supplies voltage to each fuel injector on the injector high voltage supply circuits. The ECM energizes each fuel



injector by grounding the high voltage control circuit of the fuel injector. The ECM monitors the status of the injector high voltage supply circuits



and the fuel injector high voltage control circuits. When a fuel injector circuit condition is detected by the ECM, the affected fuel injector(s) is



disabled.



Conditions for Running the DTC



* The engine is running.



* The ignition voltage is between 11-18 V.



* The DTCs run continuously once the above conditions are met.



Conditions for Setting the DTC



P0201, P0202, P0203, P0204, P0205, or P0206



The ECM detects the injector high voltage supply circuit or the injector high voltage control circuit is open for greater than 2 s.



P0261, P0264, P0267, P0270, P0273, or P0276



The ECM detects the injector high voltage control circuit is shorted to ground for greater than 2 s.



P0262, P0265, P0268, P0271, P0274, or P0277



The ECM detects the injector high voltage control circuit is shorted to voltage for greater than 2 s.



Action Taken When the DTC Sets



DTCs P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, and P0277



are Type A DTCs.



Conditions for Clearing the DTC



DTCs P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, and P0277



are Type A DTCs.



Diagnostic Aids



* Performing the fuel injector coil test may help isolate an intermittent condition. Refer to Fuel Injector Solenoid Coil Test (LAU) (See:



Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and Inspection)Fuel Injector Solenoid Coil Test (LF1, LFW)

2010 Cadillac Truck SRX AWD V6-3.0L Page 958

2010 Cadillac Truck SRX AWD V6-3.0L Page 958



2. Allow the engine to reach the normal operating temperature.



3. Idle the engine for 10 minutes or until a DTC sets. Observe the DTC information with a scan tool, DTCs P0008 and P0009 should not set.



4. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the



conditions that you observed from the Freeze Frame/Failure Records data.



Circuit/System Testing



1. Inspect the timing chains and tensioners for excessive wear or misalignment.



瀚慖f you find a condition with the timing chains or tensioners, repair as necessary.



2. Inspect the crankshaft reluctor wheel for being mis-positioned on the crankshaft.



瀚慖f you find a condition with the crankshaft, repair as necessary.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Timing Chain Alignment Diagram (See: Engine, Cooling and Exhaust/Engine/Timing Components/Timing Component Alignment



Marks/Locations)



* Camshaft Timing Drive Components Cleaning and Inspection (See: Engine, Cooling and Exhaust/Engine/Service and Repair/Overhaul/81.



Camshaft Timing Drive Components Cleaning and Inspection)



* Crankshaft and Bearing Cleaning and Inspection (See: Engine, Cooling and Exhaust/Engine/Service and Repair/Overhaul/66. Crankshaft



and Bearing Cleaning and Inspection)



P0010



DTC P0010, P0013, P0020, or P0023 (LF1, LFW)



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC P0010



- Intake Camshaft Position Actuator Solenoid Valve Control Circuit Bank 1



DTC P0013



- Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Bank 1



DTC P0020



- Intake Camshaft Position Actuator Solenoid Valve Control Circuit Bank 2



DTC P0023



- Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Bank 2



Circuit/System Description



The camshaft position actuator system enables the Engine Control Module (ECM) to change the timing of the camshafts while the engine is



operating. The Camshaft Position Actuator Solenoid Valve signal from the ECM is pulse width modulated (PWM). The ECM controls the



Camshaft Position Actuator Solenoid Valve duty cycle by controlling the amount of solenoid valve ON time. The Camshaft Position Actuator



Solenoid Valve controls the advance or the retard of each camshaft. The Camshaft Position Actuator Solenoid Valve controls the oil flow that



applies the pressure to advance or retard the camshafts.



The ECM controls the Camshaft Position Actuator Solenoid Valve by suppling a 12 V pulse width modulated (PWM) signal. The ECM supplies a



ground to the low reference circuit.



Conditions for Running the DTC



* The ignition voltage is greater than 11 V.



* The ignition switch is in the Crank or Run position.



* The ECM commanded the Camshaft Position Actuator Solenoid Valve ON.

2010 Cadillac Truck SRX AWD V6-3.0L Page 1020

2010 Cadillac Truck SRX AWD V6-3.0L Page 1020



* DTCs P0010, P0011, P0013, P0014, P0020, P0021, P0023, P0024, P2088, P2089, P2090, P2091, P2092, P2093, P2094, or P2095 are not



set.



* The engine is operating for greater than 2 s.



* The engine must accelerate such that the camshaft position actuator system is commanded from the park position to the phased position. This



is considered a cam control cycle. There must be a minimum of 2 cam control cycles for at least 2.5 s each in the phased position.



* DTC P0016, P0017, P0018, and P0019 run continuously when the above conditions are met for approximately 10 min.



Conditions for Setting the DTC



The ECM detects the ECM learned camshaft position angle is greater than 10 degrees advanced or 10 degrees retarded in relationship to the



crankshaft.



OR



The ECM detects the actual camshaft angle is advanced 15 degrees or retarded 21 degrees in relationship to the camshaft parked/reference position



for greater than 10 s.



Action Taken When the DTC Sets



DTCs P0016, P0017, P0018, and P0019 are Type B DTCs.



Conditions for Clearing the DTC



DTCs P0016, P0017, P0018, and P0019 are Type B DTCs.



Diagnostic Aids



* Inspect the engine for any recent engine mechanical repairs. An incorrectly installed camshaft, camshaft actuator, camshaft sensor, crankshaft



sensor, or timing chain can cause this DTC to set.



* An actuator that is in the full advance or retard position can cause this DTC to set.



* The presence of DTCs P0008 and P0009 along with P0016, P0017, P0018, and P0019 indicates a possible condition with the primary timing



chain and the alignment between both intermediate sprockets and the crankshaft. Or, the crankshaft reluctor wheel has moved and is no



longer referenced to top dead center (TDC).



* Observing the desired and actual camshaft angle parameters, with a scan tool before a DTC sets, may help to isolate whether a condition is



specific to one camshaft, one bank, or caused by a condition with the primary crankshaft timing.



Reference Information



Schematic Reference



Engine Controls Schematics (LAU) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics



(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)



Description and Operation



Camshaft Actuator System Description (See: Powertrain Management/Computers and Control Systems/Description and Operation/Camshaft



Actuator System)



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)



DTC Type Reference



Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code



(DTC) Type Definitions)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Testing

2010 Cadillac Truck SRX AWD V6-3.0L Page 494

2010 Cadillac Truck SRX AWD V6-3.0L Page 494



* Front vertical downward switch terminal K



* Rear vertical upward switch terminal F



* Rear vertical downward switch terminal J



* Horizontal forward switch terminal D



* Horizontal rearward switch terminal C



* Recline forward switch terminal H



* Recline rearward switch terminal G



3. If all circuits test normal, test or replace the S64D driver seat adjuster switch.



Component Testing



1. Ignition OFF, disconnect the harness connector at the S64D driver seat adjuster switch.



2. Test for infinite resistance between the ground terminal E and each seat direction signal terminal with the switch in the open position.



瀚慖f not the specified value, replace the S64D driver seat adjuster switch.



3. Test for less than 2 Ohms between the ground terminal E and each signal terminal with the appropriate switch in the closed position.



瀚慖f greater than the specified value, replace the S64D driver seat adjuster switch.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Driver Seat Adjuster Switch Replacement (See: Body and Frame/Seats/Power Seat Switch/Service and Repair/Driver Seat Adjuster Switch



Replacement)



* Control Module References (See: Testing and Inspection/Programming and Relearning) for seat memory control module replacement, setup,



and programming



B1755



DTC B1735, B1740, B1745, B1750, B1755, B1760, B1815, or B1820



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC B1735 02



- Driver Seat Front Up Switch Circuit Short to Ground



DTC B1740 02



- Driver Seat Front Down Switch Circuit Short to Ground



DTC B1745 02



- Driver Seat Rear Up Switch Circuit Short to Ground



DTC B1750 02



- Driver Seat Rear Down Switch Circuit Short to Ground



DTC B1755 02



- Driver Seat Assembly Forward Switch Circuit Short to Ground



DTC B1760 02



- Driver Seat Assembly Rearward Switch Circuit Short to Ground



DTC B1815 02



- Driver Seat Recline Forward Switch Circuit Short to Ground



DTC B1820 02



- Driver Seat Recline Rearward Switch Circuit Short to Ground



Diagnostic Fault Information

Tuesday, July 28, 2020

2010 Cadillac Truck SRX AWD V6-3.0L Page 1166

2010 Cadillac Truck SRX AWD V6-3.0L Page 1166



瀚慖f less than the specified range, test for a short between the high voltage supply circuit and high voltage control circuit. If the



circuits/connections test normal, test or replace the appropriate Q17 fuel injector(s).



瀚慖f greater than the specified range, test the high voltage supply circuit and high voltage control circuit for an open/high resistance. If the



circuits/connections test normal, test or replace the appropriate Q17 fuel injector.



Component Testing



* Fuel Injector Solenoid Coil Test (LAU) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and Inspection



)Fuel Injector Solenoid Coil Test (LF1, LFW) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and



Inspection)



* Fuel Injector Balance Test (LAU) (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests



and General Diagnostics/Fuel Injector Balance Test)Fuel Injector Balance Test (LF1, LFW) (See: Powertrain Management/Computers and



Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Fuel Injector Balance Test)



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel



Rail/Service and Repair/Fuel Injection Fuel Rail Assembly Replacement - Bank 1)



* Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel



Rail/Service and Repair/Fuel Injection Fuel Rail Assembly Replacement - Bank 2)



* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming



P0131



DTC P0131, P0132, P0137, P0138, P0151, P0152, P0157, P0158, P2A00, P2A01, P2A03, or P2A04 (LF1)



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC P0131



- HO2S Circuit Low Voltage Bank 1 Sensor 1



DTC P0132



- HO2S Circuit High Voltage Bank 1 Sensor 1



DTC P0137



- HO2S Circuit Low Voltage Bank 1 Sensor 2



DTC P0138



- HO2S Circuit High Voltage Bank 1 Sensor 2



DTC P0151



- HO2S Circuit Low Voltage Bank 2 Sensor 1



DTC P0152



- HO2S Circuit High Voltage Bank 2 Sensor 1



DTC P0157



- HO2S Circuit Low Voltage Bank 2 Sensor 2



DTC P0158



- HO2S Circuit High Voltage Bank 2 Sensor 2



DTC P2A00



- HO2S Circuit Closed Loop Performance Bank 1 Sensor 1



DTC P2A03



- HO2S Circuit Closed Loop Performance Bank 2 Sensor 1

2010 Cadillac Truck SRX AWD V6-3.0L Page 1014

2010 Cadillac Truck SRX AWD V6-3.0L Page 1014



The fuel pressure sensor is located on the fuel line. The fuel pressure sensor monitors the fuel pressure in the fuel line. The fuel pump control



module monitors the voltage signal from the fuel pressure sensor.



Conditions for Running the DTC



* The engine is running.



* DTC P018C, P018D, P0231, P0232, P023F, P064A, P1255 or P06A6 are not active.



* DTC P0641 has not failed this ignition cycle.



* Fuel pump control is enabled and the fuel pump control state is normal.



* The engine has been running for at least 5 seconds.



Conditions for Setting the DTC



The fuel pump control module does not detect a change in the fuel pressure of at least 30 kPa (4.4 psi) when the fuel pump is operating. The fuel



pressure sensor performance diagnostic provides a means to detect fuel pressure sensor output that is stuck within the normal operating range of the



sensor.



Action Taken When the DTC Sets



DTC P018B, P018C and P018D are Type A DTCs.



Conditions for Clearing the DTC



DTC P018B, P018C and P018D are Type A DTCs.



Diagnostic Aids



Using the Failure Records data may help locate an intermittent condition. If you cannot duplicate the DTC, the information in the Failure Records



can help determine how many miles since the DTC set. The Fail Counter and Pass Counter can help determine how many ignition cycles that the



diagnostic test reported a pass and/or a fail.



Reference Information



Schematic Reference



Engine Controls Schematics (LAU) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics



(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)



Description and Operation



Fuel System Description (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Description and Operation/Fuel System



Description)Fuel System Description (LAU or LY7) (See: Powertrain Management/Fuel Delivery and Air Induction/Description and



Operation/Fuel System Description)



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)



DTC Type Reference



Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code



(DTC) Type Definitions)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Testing



Note: Verify that the fuel tank is not empty. Only perform this diagnostic if there is at least 2 gallons of fuel in the fuel tank. Clear the DTC, and



start and run the engine. Verify that the DTC P018B resets before proceeding with the circuit system testing. If the DTC does not reset, refer to

2010 Cadillac Truck SRX AWD V6-3.0L Page 1311

2010 Cadillac Truck SRX AWD V6-3.0L Page 1311



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)



DTC Type Reference



Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code



(DTC) Type Definitions)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Verification



1. Observe the DTC information with a scan tool. DTC P0627, P0628, P0629, P069E, or U0109 should not set.



瀚慖f a DTC is set refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code Descriptions/Diagnostic Trouble



Code (DTC) List - Vehicle).



2. Attempt to start and idle the engine.



3. Observe the DTC information with a scan tool. DTCs P0089, P00C6, P228C, and P228D should not set.



4. Engine idling, observe the Fuel Rail Pressure Sensor parameter with a scan tool. The pressure should be approximately 1.9-2.1 Mpa (279-305



psi).



5. Command an increase and decrease in Fuel Pressure with a scan tool. Observe the scan tool Fuel Rail Pressure Sensor parameter. The Fuel



Rail Pressure Sensor parameter should increase or decrease with each commanded state.



6. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the



conditions that you observed from the Freeze Frame/Failure Records data.



Circuit/System Testing



Note: Circuit/System Verification must be performed first or misdiagnosis may result.



1. Ignition ON, observe the scan tool Fuel Pump Control Module Fuel Pressure Sensor parameter. Command an increase in Fuel Pressure with a



scan tool. Verify the Fuel Pressure Sensor parameter increases to greater than 414 kPa (60 psi) as commanded.



瀚慖f less than the specified range, refer to Fuel System Diagnosis (LF1 China) (See: Powertrain Management/Fuel Delivery and Air



Induction/Fuel Pump/Testing and Inspection/Fuel System Diagnosis (China))Fuel System Diagnosis (LF1 Except China) (See:



Powertrain Management/Fuel Delivery and Air Induction/Fuel Pump/Testing and Inspection/Fuel System Diagnosis (Except China))Fuel



System Diagnosis (LAU China) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Pump/Testing and Inspection/Fuel



System Diagnosis (China))Fuel System Diagnosis (LAU Except China) (See: Powertrain Management/Fuel Delivery and Air



Induction/Fuel Pump/Testing and Inspection/Fuel System Diagnosis (Except China)).



Note: As little as 2 ohm on either circuit of the high pressure fuel pump actuator will cause these DTCs to set. Test the circuits of the high



pressure fuel pump actuator for a high resistance if you suspect a condition.



2. Remove the G18 high pressure fuel pump and visually inspect the lobes on the camshaft for unusual wear.



瀚慖f the lobes appear normal, replace the G18 high pressure fuel pump.



瀚慖f the lobes are worn, replace the camshaft.



Component Testing



Static Test



1. Ignition OFF, disconnect the harness connector at the G18 high pressure fuel pump.



Note: The DMM and test leads must be calibrated to 0 ohm in order to prevent misdiagnosis.



2. Test for 10 ohm plus/minus 1 ohm at 25掳C (77掳F) between the low control circuit terminal 1 and the high control circuit terminal 2.



瀚慖f not within the specified range, replace the G18 high pressure fuel pump.



3. Test for infinite resistance between each terminal and the G18 high pressure fuel pump housing.



瀚慖f not the specified value, replace the G18 high pressure fuel pump.

2010 Cadillac Truck SRX AWD V6-3.0L Page 931

2010 Cadillac Truck SRX AWD V6-3.0L Page 931



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* Heated Oxygen Sensor Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical



Diagnostic Procedures/Wiring Repairs/Heated Oxygen Sensor Wiring Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)



DTC Type Reference



Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code



(DTC) Type Definitions)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Verification



1. Ignition ON, observe the DTC information with a scan tool. Verify no B52 HO2S heater DTCs are set.



瀚慖f a B52 HO2S heater DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code



Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).



2. Engine running, observe the appropriate scan tool B52 HO2S voltage parameter. The reading should be within the range of 50-1,050 mV.



3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the



conditions that you observed from the Freeze Frame/Failure Records data.



Circuit/System Testing



1. Ignition OFF, disconnect the appropriate B52 HO2S harness connector.



2. Ignition ON, observe the appropriate scan tool HO2S voltage parameter. The parameter should display 1.27 V.



瀚慖f less than the specified range, test the high and low signal circuits for a short to ground. If both signal circuit test normal, replace the



K20 ECM.



3. Ignition ON, test for 2.5-3.0 V between the high signal circuit terminal B and ground.



瀚慖f less than the specified range, test the high signal circuit for an open/high resistance. If the circuit tests normal, replace the K20 ECM.



瀚慖f greater than the specified range, test the high signal circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.



4. Ignition OFF, connect a 3 A fused jumper wire between the high signal circuit terminal B and the low signal circuit terminal A.



Note: The low signal circuit is tied to a pull-up circuit within the ECM. A voltage of 0.90-1.10 V on the low signal circuit is normal.



5. Ignition ON, verify the scan tool HO2S parameter displays 0.0 V.



瀚慖f greater than the specified range, test the low signal circuit for an open/high resistance or for a short to voltage. If the circuit tests



normal, replace the K20 ECM.



6. If all circuits test normal, test or replace the appropriate B52 HO2S.



Repair Instructions



Caution: Refer to Heated Oxygen Sensor Resistance Learn Reset Caution (See: Powertrain Management/Computers and Control



Systems/Oxygen Sensor/Service Precautions/Heated Oxygen Sensor Resistance Learn Reset Caution).



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen



Sensor/Service and Repair/Heated Oxygen Sensor Replacement - Bank 1 Sensor 1)



* Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen



Sensor/Service and Repair/Heated Oxygen Sensor Replacement - Bank 1 Sensor 2)



* Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen



Sensor/Service and Repair/Heated Oxygen Sensor Replacement - Bank 2 Sensor 1)



* Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen



Sensor/Service and Repair/Heated Oxygen Sensor Replacement - Bank 2 Sensor 2)

2010 Cadillac Truck SRX AWD V6-3.0L Page 1547

2010 Cadillac Truck SRX AWD V6-3.0L Page 1547



DTC P0522



- Engine Oil Pressure Sensor Circuit Low Voltage



DTC P0523



- Engine Oil Pressure Sensor Circuit High Voltage



Diagnostic Fault Information



Circuit/System Description



The engine oil pressure sensor changes voltage based on the engine oil pressure. The engine oil pressure sensor is a 3-wire sensor comprised of the



signal circuit, the low reference circuit and the 5 V reference circuit. The engine control module (ECM) supplies 5 V to the engine oil pressure



sensor via the 5 V reference circuit and provides ground via the engine oil pressure sensor low reference circuit. The ECM monitors the signal



circuit of the engine oil pressure sensor to determine the engine oil pressure sensor voltage is within the normal operating range of approximately



1-4 V. When the engine oil pressure is high, the engine oil pressure sensor voltage is high and the sensor senses a high signal voltage. When the



engine oil pressure is low, the engine oil pressure sensor voltage is low and the ECM senses a low signal voltage. The ECM sends the engine oil



pressure sensor information via High Speed CAN-Bus to the body control module (BCM). The BCM then sends the engine oil pressure sensor



information via Low Speed CAN-Bus to the instrument cluster.



Conditions for Running the DTC



The engine is running



Conditions for Setting the DTC



P0521



* The engine oil pressure is out of its working range.



* The ECM does not detect a change in the engine oil pressure.



* The above condition is present over a predetermined variance of engine speed.



P0522



* The ECM detects a short to ground in the engine oil pressure signal circuit.



* The above condition is present for greater than 10 seconds.



P0523



* The ECM detects a short to voltage or an open circuit in the engine oil pressure signal circuit.



* The above condition is present for greater than 10 seconds.



Action Taken When the DTC Sets



The instrument cluster illuminates the service vehicle soon indicator.



Conditions for Clearing the DTC



The DTC becomes history when the conditions for setting the DTC are no longer present.



Reference Information



Schematic Reference



Instrument Cluster Schematics (See: Diagrams/Electrical Diagrams/Instrument Panel, Gauges and Warning Indicators/System Diagram/Instrument



Cluster Schematics)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)



Description and Operation



* Instrument Cluster Description and Operation (See: Instrument Panel, Gauges and Warning Indicators/Description and



Operation/Instrument Cluster)



* Indicator/Warning Message Description and Operation (See: Instrument Panel, Gauges and Warning Indicators/Description and



Operation/Indicator/Warning Message)



* Driver Information Center (DIC) Description and Operation (See: Instrument Panel, Gauges and Warning Indicators/Description and



Operation/Driver Information Center (DIC))

2010 Cadillac Truck SRX AWD V6-3.0L Page 19

2010 Cadillac Truck SRX AWD V6-3.0L Page 19

2010 Cadillac Truck SRX AWD V6-3.0L Page 1356

2010 Cadillac Truck SRX AWD V6-3.0L Page 1356



* Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel



Rail/Service and Repair/Fuel Injection Fuel Rail Assembly Replacement - Bank 1)



* Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel



Rail/Service and Repair/Fuel Injection Fuel Rail Assembly Replacement - Bank 2)



* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming



P0268



DTC P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, or P0277



(LF1)



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC P0201



- Cylinder 1 Injector Control Circuit



DTC P0202



- Cylinder 2 Injector Control Circuit



DTC P0203



- Cylinder 3 Injector Control Circuit



DTC P0204



- Cylinder 4 Injector Control Circuit



DTC P0205



- Cylinder 5 Injector Control Circuit



DTC P0206



- Cylinder 6 Injector Control Circuit



DTC P0261



- Cylinder 1 Injector Control Circuit Low Voltage



DTC P0262



- Cylinder 1 Injector Control Circuit High Voltage



DTC P0264



- Cylinder 2 Injector Control Circuit Low Voltage



DTC P0265



- Cylinder 2 Injector Control Circuit High Voltage



DTC P0267



- Cylinder 3 Injector Control Circuit Low Voltage



DTC P0268



- Cylinder 3 Injector Control Circuit High Voltage



DTC P0270



- Cylinder 4 Injector Control Circuit Low Voltage



DTC P0271



- Cylinder 4 Injector Control Circuit High Voltage



DTC P0273



- Cylinder 5 Injector Control Circuit Low Voltage



DTC P0274



- Cylinder 5 Injector Control Circuit High Voltage

Monday, July 27, 2020

2010 Cadillac Truck SRX AWD V6-3.0L Page 523

2010 Cadillac Truck SRX AWD V6-3.0L Page 523



the module. This reference point is biased to approximately 2.5 V. Before the rear seat heating control module will allow heated seat operation, it



checks to see if this biased voltage is shorted to ground or voltage. Once the module verifies that it is not closing to a shorted heating element, it



allows for heated seat operation. The module will then continue to monitor the heating elements for a shorted circuit.



Conditions for Running the DTC



The rear seat heating control module must be powered.



Conditions for Setting the DTC



B2345 13



Any temperature sensor input that remains below 1.5 V for more than 1 second.



Action Taken When the DTC Sets



The heated seat function for both rear seats will be disabled.



Conditions for Clearing the DTC



* The current DTC will clear and set the code to history 3 seconds after the reference voltage returns to the normal operating range and the



ignition is cycled OFF then back to ACC or RUN.



* The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.



Reference Information



Schematic Reference



Heated/Cooled Seat Schematics (See: Body and Frame/Seats/Seat Temperature Element/Diagrams/Electrical Diagrams)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)



Description and Operation



Rear Heated Seats Description and Operation (See: Body and Frame/Seats/Seat Temperature Element/Description and Operation/Rear Heated



Seats)



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Testing



1. Ignition OFF, disconnect the X2, X3 harness connectors at the K29R rear seat heating control module.



2. Test for greater than 3.0 kOhms between the signal and the low reference circuits listed below:



* E14F left rear seat cushion terminal 3 X3 and terminal 13 X2



* E14H right rear seat cushion terminal 4 X3 and terminal 14 X2



瀚慖f less than the specified value, test for a short between the signal and low reference circuits. If the circuits test normal, replace the



appropriate E14 seat cushion heating element.



3. If all circuits test normal, replace the K29R rear seat heating control module.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Rear Seat Cushion Heater Replacement (40 Percent Seat) (See: Body and Frame/Seats/Seat Temperature Element/Service and Repair/Rear



Seat Cushion Heater Replacement (40 Percent Seat))Rear Seat Cushion Heater Replacement (60 Percent Seat) (See: Body and



Frame/Seats/Seat Temperature Element/Service and Repair/Rear Seat Cushion Heater Replacement (60 Percent Seat))

2010 Cadillac Truck SRX AWD V6-3.0L Page 1309

2010 Cadillac Truck SRX AWD V6-3.0L Page 1309



瀚慖f less than specified range, test the signal circuit for a short to ground, or an open/high resistance. If the circuit tests normal, replace the



K20 ECM.



瀚慖f greater than specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.



6. Install a 3 A fused jumper wire between TP sensor 1 signal circuit terminal D and the 5 V reference circuit terminal E. Verify the scan tool



TP sensor 1 voltage parameter is greater than 4.8 V.



瀚慖f less than the specified range, test the signal circuit for a short to ground, or an open/high resistance. If the circuit tests normal, replace



the K20 ECM.



7. If all circuits test normal, test or replace the Q38 throttle body assembly.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair.



* Throttle Body Assembly Replacement (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Throttle Body/Service and



Repair/Removal and Replacement)Throttle Body Assembly Replacement (LAU) (See: Powertrain Management/Fuel Delivery and Air



Induction/Throttle Body/Service and Repair/Removal and Replacement)



* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, programming, and setup



P228C



DTC P0089, P00C6, P228C, or P228D (LF1, LFW)



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC P0089



- Fuel Pressure Regulator Performance



DTC P00C6



- Fuel Rail Pressure Low During Engine Cranking



DTC P228C



- Fuel Pressure Regulator 1 Control Performance - Low Pressure



DTC P228D



- Fuel Pressure Regulator 1 Control Performance - High Pressure



Circuit/System Description



The fuel rail pressure sensor detects fuel pressure within the fuel rail. The engine control module (ECM) provides a 5 V reference voltage on the 5



V reference circuit and ground on the low reference circuit. The ECM receives a varying signal voltage on the signal circuit.



High pressure fuel is regulated by the high pressure fuel pump actuator, which is a part of the high pressure fuel pump. The high pressure fuel pump



actuator is a solenoid valve. The ECM provides a voltage on the actuator high control circuit and ground on the actuator low control circuit. Both



circuits are controlled through output drivers within the ECM. When deactivated, both drivers are disabled. When activated, the high control circuit



driver energizes the high pressure fuel pump actuator and the low control circuit driver pulse-width modulates (PWM) the low control circuit to



ground.



The high pressure mechanical fuel pump is driven by three lobes on the camshaft. The ECM uses the camshaft and crankshaft position sensor inputs



to synchronize the high pressure fuel pump actuator with the position of each of the camshaft lobes. The ECM regulates fuel pressure by adjusting



the portion of each pump stroke that provides fuel to the rail.



The ECM monitors the fuel rail fuel pressure sensor and the high pressure fuel pump actuator to determine if the commanded and actual pressure



are within a predetermined range, or if the amount of fuel pressure correction exceeds a calibrated pressure.



Conditions for Running the DTC



P0089, P228C, or P228D

2010 Cadillac Truck SRX AWD V6-3.0L Page 861

2010 Cadillac Truck SRX AWD V6-3.0L Page 861



* Steering Angle Sensor Replacement (See: Sensors and Switches/Sensors and Switches - Steering and Suspension/Sensors and Switches -



Steering/Steering Angle Sensor/Service and Repair/Removal and Replacement)



* Control Module References (See: Testing and Inspection/Programming and Relearning)for module replacement, setup and programming



C0720



DTC C0720



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions)provides an overview of each diagnostic category.



DTC Descriptor



DTC C0720 71



- Engine Torque Management Feedback Signal Invalid Data



Circuit/System Description



The suspension control module receives high speed controller area network (CAN) message inputs from the engine control module (ECM)



identifying the actual engine torque. The suspension control module utilizes this signal to control the vehicle ride characteristics.



Conditions for Running the DTC



System voltage is between 9-16 V



Conditions for Setting the DTC



The suspension control module received invalid serial data from the ECM.



Action Taken When the DTC Sets



The electronic suspension control is disabled for the duration of the ignition cycle.



Conditions for Clearing the DTC



* The condition for setting the DTC is no longer present.



* A history DTC will clear after 41 consecutive malfunction-free ignition cycles.



Reference Information



Schematic Reference



Electronic Suspension Control Schematics (See: Steering and Suspension/Suspension/Suspension Control ( Automatic - Electronic



)/Diagrams/Electrical Diagrams)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)



Description and Operation



Electronic Suspension Control Description and Operation (See: Steering and Suspension/Suspension/Suspension Control ( Automatic - Electronic



)/Description and Operation)



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)

2010 Cadillac Truck SRX AWD V6-3.0L Page 486

2010 Cadillac Truck SRX AWD V6-3.0L Page 486



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Verification



Ignition ON, observe the scan tool Seat Memory Control Module seat switch parameters listed below while pressing and releasing the appropriate



seat directional switch. The readings should change between Inactive and Forward/Rearward or UP/Down.



* Driver Seat Cushion Front Vertical Switch



* Driver Seat Cushion Rear Vertical Switch



* Driver Seat Horizontal Switch



* Driver Seat Back Switch



Circuit/System Testing



1. Ignition OFF, disconnect the harness connector at the S64D driver seat adjuster switch.



2. Verify that all scan tool driver seat switch parameters listed below are Inactive:



* Driver Seat Cushion Front Vertical Switch



* Driver Seat Cushion Rear Vertical Switch



* Driver Seat Horizontal Switch



* Driver Seat Back Switch



瀚慖f not the specified value, test the appropriate signal circuit listed below for a short to ground. If the circuit tests normal, replace the K40



seat memory control module.



* Front vertical upward switch terminal A



* Front vertical downward switch terminal K



* Rear vertical upward switch terminal F



* Rear vertical downward switch terminal J



* Horizontal forward switch terminal D



* Horizontal rearward switch terminal C



* Recline forward switch terminal H



* Recline rearward switch terminal G



3. If all circuits test normal, test or replace the S64D driver seat adjuster switch.



Component Testing



1. Ignition OFF, disconnect the harness connector at the S64D driver seat adjuster switch.



2. Test for infinite resistance between the ground terminal E and each seat direction signal terminal with the switch in the open position.



瀚慖f not the specified value, replace the S64D driver seat adjuster switch.



3. Test for less than 2 Ohms between the ground terminal E and each signal terminal with the appropriate switch in the closed position.



瀚慖f greater than the specified value, replace the S64D driver seat adjuster switch.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Driver Seat Adjuster Switch Replacement (See: Body and Frame/Seats/Power Seat Switch/Service and Repair/Driver Seat Adjuster Switch



Replacement)



* Control Module References (See: Testing and Inspection/Programming and Relearning) for seat memory control module replacement, setup,



and programming



B1740



DTC B1735, B1740, B1745, B1750, B1755, B1760, B1815, or B1820



Diagnostic Instructions