Tuesday, June 30, 2020

2010 Cadillac Truck SRX AWD V6-3.0L Page 1211

2010 Cadillac Truck SRX AWD V6-3.0L Page 1211



* The torque converter clutch (TCC) is applied.



* The DTCs run once per ignition cycle, during decel fuel cut-off (DFCO), when the above conditions are met.



P013B P013D, P013F, or P014B



* Before the ECM can report DTC P013B, or P013D failed, DTCs P013A, P013C, P013E, P013F, P014A, P014B, P2270, P2271, P2272, and



P2273 must run and pass.



* Before the ECM can report DTC P013F, or P014B failed, DTCs P013A, P013C, P013E, P014A, P2270, P2271, P2272, and P2273 must run



and pass.



* DTCs P0030, P0036, P0053, P0054, P0101, P0102, P0103, P0106, P0107, P0108, P0120, P0121, P0122, P0123, P0131, P0132, P0133,



P0134, P0135, P0137, P0138, P013A, P013B, P013E, P013F, P0140, P0141, P0171, P0172, P0201, P0202, P0203, P0204, P0220, P0222,



P0223, P0300, P0442, P0443, P0446, P0449, P0455, P0496, P1133, P1174, P1516, P2101, P2119, P2135, P2176, P2270, P2271, P2A00 are



not set.



* The ignition 1 voltage is between 10-32 V.



* The learned heater resistance is valid.



* The fuel level is greater than 10 %.



* The engine run time is equal to or greater than 5 min.



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



Conditions for Setting the DTC



P0133 or P0153



* The ECM detects that the HO2S 1 rich-to-lean or lean-to-rich average response time is greater than a calibrated value.



* The DTCs set within 60 s when the above condition is met.



P013A or P013C



The ECM detects that the accumulated mass air flow monitored during rich-to-lean transitions between 450-150 mV is greater than 75 grams.



P013B or P013D



The ECM detects that the accumulated mass air flow monitored during lean-to-rich transitions between 350-650 mV is greater than 75 grams.



P013E or P014A



The ECM detects that the O2 sensor voltage has not decreased below 450 mV within 42 grams of accumulated air flow.



P013F or P014B



The ECM detects that the O2 sensor voltage has not increased above 350 mV within 200 grams of accumulated air flow.



P1133 or P1153



* The ECM detects that the HO2S 1 rich-to-lean counts, or the lean-to-rich counts are less than a calibrated value.



* The DTCs set within 60 s when the above condition is met.



Action Taken When the DTC Sets



DTCs P0133, P013A, P013B, P013C, P013D, P013E, P013F, P014A, P014B, P0153, P1133, and P1153 are Type B DTCs.



Conditions for Clearing the DTC



DTCs P0133, P013A, P013B, P013C, P013D, P013E, P013F, P014A, P014B, P0153, P1133, and P1153 are Type B DTCs.



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)



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)

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2010 Cadillac Truck SRX AWD V6-3.0L Page 6

2010 Cadillac Truck SRX AWD V6-3.0L Page 570

2010 Cadillac Truck SRX AWD V6-3.0L Page 570



* 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 B2540 02



- Rear Fog Lamps Control Circuit Short to Ground



Diagnostic Fault Information



Circuit/System Description



The body control module (BCM) energizes the rear fog lamp by applying voltage to the rear fog lamp control circuit. When the rear fog lamp



control circuit is energized the rear fog lamp is illuminated.



Conditions for Running the DTC



Rear fog lamp activated



Conditions for Setting the DTC



The BCM detects a short to ground on the rear fog lamp control circuit.



Action Taken When the DTC Sets



The rear fog lamp will be inoperative.



Conditions for Clearing the DTC



* The DTC will be current for as long as the fault is present.



* When the fault is no longer present, the DTC will be a history DTC.



* A history DTC will clear after 50 ignition cycles.



Reference Information



Schematic Reference



Fog Lights Schematics (See: Diagrams/Electrical Diagrams/Lighting and Horns/System Diagram/Fog Lights Schematics)



Connector End View Reference



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



Description and Operation



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



Scan Tool Reference



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



Circuit/System Verification

2010 Cadillac Truck SRX AWD V6-3.0L Page 1228

2010 Cadillac Truck SRX AWD V6-3.0L Page 1228



Circuit/System Testing



Note: You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.



1. Ignition OFF, disconnect the harness connector at the S87 fuel economy mode switch.



Note: It may take up to 2 minutes for all vehicle systems to power down.



2. Ignition OFF and all vehicle systems OFF, test for less than 5 ohm between ground circuit terminal 2 of the harness connector and ground.



瀚慖f greater than the specified value, test the ground circuit for an open/high resistance and repair as necessary.



3. Ignition ON, test for 4.8-5.2 V between 5 V reference circuit terminal 9 of the harness connector 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.



4. Ignition ON, test for 0.060-0.250 V between signal circuit terminal 10 of the harness connector and ground.



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.



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



5. If all circuits test normal, test or replace the S87 fuel economy mode switch.



Component Testing



1. Ignition OFF, disconnect the S87 fuel economy mode switch.



2. Test for 266-294 ohm between 5 V reference voltage circuit terminal 9 and signal circuit terminal 10 of the S87 fuel economy mode switch.



瀚慖f not within the specified range, replace the S87 fuel economy mode switch.



3. Test for 1,414-1,562 ohm between 5 V reference voltage circuit terminal 9 and ground circuit terminal 2 of the S87 fuel economy mode



switch.



瀚慖f not within the specified range, replace the S87 fuel economy mode switch.



4. With the S87 fuel economy mode switch button depressed, test for 486-538 ohm between 5 V reference voltage circuit terminal 9 and ground



circuit terminal 2 of the S87 fuel economy mode switch.



瀚慖f not within the specified range, replace the S87 fuel economy mode switch.



Repair Instructions



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



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



P0160



DTC P0134, P0140, P0154, or P0160 (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 P0134



- HO2S Circuit Insufficient Activity Bank 1 Sensor 1

2010 Cadillac Truck SRX AWD V6-3.0L Page 1035

2010 Cadillac Truck SRX AWD V6-3.0L Page 1035



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)



* 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



1. Ignition OFF, disconnect the harness connector at the K27 fuel pump control module.



2. Ignition OFF, connect a test lamp between the control circuit terminal 20 and ground.



3. Ignition ON, command the ECM fuel pump enable command ON and OFF with a scan tool. The test lamp should turn ON and OFF when



changing between the commanded states.



瀚慖f the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.



瀚慖f the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace



the K20 ECM.



4. If all circuits test normal, replace the K27 fuel pump control module.



Repair Instructions



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



Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM or fuel pump control module replacement, setup,



and programming



P0030



DTC P0030, P0036, P0050, P0053, P0054, P0056, P0059, P0060, P0135, P0141, P0155, or P0161 (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 P0030



- HO2S Heater Control Circuit Bank 1 Sensor 1



DTC P0036



- HO2S Heater Control Circuit Bank 1 Sensor 2



DTC P0050



- HO2S Heater Control Circuit Bank 2 Sensor 1

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2010 Cadillac Truck SRX AWD V6-3.0L Page 1508



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.



3. Ignition ON, test for 4.8-5.2V between the 5V reference circuit terminal 3 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 K20 ECM.



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 ECM.



4. Verify the scan tool B150 fuel tank pressure sensor parameter is less than 0.2V.



瀚慖f greater than the specified range, test the signal circuit terminal 1 for a short to voltage. If the circuit tests normal, replace the K20 ECM.



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



pressure sensor parameter is greater than 4.7V.



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



K20 ECM.



6. If all circuits test normal, test or replace the B150 fuel tank pressure sensor.



Repair Instructions



* Fuel Tank Pressure Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Fuel Tank Pressure Sensor/Service



and Repair)



* For DTC P0452 or P0453, always perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic



procedure.



* For DTC P0451 or P0454, clear DTCs with a scan tool.



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



P0454



DTC P0451-P0454 (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 P0451



- Fuel Tank Pressure Sensor Performance



DTC P0452



- Fuel Tank Pressure Sensor Circuit Low Voltage



DTC P0453



- Fuel Tank Pressure Sensor Circuit High Voltage



DTC P0454



- Fuel Tank Pressure Sensor Intermittent



Diagnostic Fault Information



Typical Scan Tool Data

Monday, June 29, 2020

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2010 Cadillac Truck SRX AWD V6-3.0L Page 716



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, command the E6 center high mounted stop lamp ON and OFF by applying and releasing the brake pedal. The E6 center high mounted



stop lamp should turn ON and OFF each time the brake pedal is applied and released.



Circuit/System Testing



1. Ignition OFF, disconnect the harness connector at the E6 center high mounted stop lamp.



2. Test for less than 30 ohm between the ground circuit terminal B and ground.



瀚慖f greater than the specified value, test the ground circuit for an open/high resistance.



3. Connect a test lamp between the control circuit terminal A and ground.



4. Ignition ON, command the center high mounted stop lamp ON and OFF by applying and releasing the brake pedal. The test lamp should turn



ON and OFF when changing between the selected states.



瀚慖f the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.



瀚慖f the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace



the K9 BCM.



5. If all circuits test normal, replace the E6 center high mounted stop lamp.



Repair Instructions



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



* High Mount Stop Lamp Replacement (See: Lighting and Horns/Center Mounted Brake Lamp/Service and Repair)



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



B3885



DTC B3885 or B3886



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 B3885 02



- Trailer Left Tail Lamp Circuit Short to Ground



DTC B3885 04



- Trailer Left Tail Lamp Circuit Open



DTC B3886 02



- Trailer Right Tail Lamp Circuit Short to Ground



DTC B3886 04



- Trailer Right Tail Lamp Circuit Open



Diagnostic Fault Information

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2010 Cadillac Truck SRX AWD V6-3.0L Page 174



DTC B0085 0C



- Left Front Side Impact Sensor Low Current



DTC B0085 39



- Left Front Side Impact Sensor Internal Malfunction



DTC B0085 3A



- Left Front Side Impact Sensor Incorrect Component Installed



DTC B0085 71



- Left Front Side Impact Sensor Invalid Serial Data Received



DTC B0086 01



- Right Front Side Impact Sensor Short to Battery



DTC B0086 02



- Right Front Side Impact Sensor Short to Ground



DTC B0086 04



- Right Front Side Impact Sensor Open



DTC B0086 05



- Right Front Side Impact Sensor High/Voltage Open



DTC B0086 0C



- Right Front Side Impact Sensor Low Current



DTC B0086 39



- Right Front Side Impact Sensor Internal Malfunction



DTC B0086 3A



- Right Front Side Impact Sensor Incorrect Component Installed



DTC B0086 71



- Right Front Side Impact Sensor Invalid Data



DTC B0087 01



- Left Rear Side Impact Sensor Short to Battery



DTC B0087 02



- Left Rear Side Impact Sensor Short to Ground



DTC B0087 04



- Left Rear Side Impact Sensor Open



DTC B0087 05



- Left Rear Side Impact Sensor High/Voltage Open



DTC B0087 0C



- Left Rear Side Impact Sensor Low Current



DTC B0087 39



- Left Rear Side Impact Sensor Internal Malfunction



DTC B0087 3A



- Left Rear Side Impact Sensor Incorrect Component Installed



DTC B0087 71



- Left Rear Side Impact Sensor Invalid Serial Data Received



DTC B0088 01



- Right Rear Side Impact Sensor Short to Battery



DTC B0088 02



- Right Rear Side Impact Sensor Short to Ground



DTC B0088 04



- Right Rear Side Impact Sensor Open

2010 Cadillac Truck SRX AWD V6-3.0L Page 147

2010 Cadillac Truck SRX AWD V6-3.0L Page 147



- SDM wiring harness connector



- Roof rail air bag wiring harness connector



- Seat side air bag wiring harness connector



- Passenger instrument panel air bag wiring harness connector



- Seat belt retractor pretensioner wiring harness connector



* The connector and connector position assurance (CPA) may seat independent of each other. Both the connector and CPA should seat with an



audible and/or tactile click. The CPA isolates the shorting-bars within the connector allowing the deployment circuit to operate properly.



* If the condition is intermittent or cannot be duplicated, disconnect the connectors and add Nyogel lubricant 760G. This procedure will correct



the high resistance condition due to terminal fretting corrosion.



Observe the scan tool Deployment Loop Resistance parameters while moving the harness near each connector listed below. The reading should stay



consistently between 1.7 and 4.2 ohm without any drop outs or spikes.



* F105 Passenger instrument panel air bag, and Roof rail air bag



* F106 Seat side air bag



* F112 Seat belt retractor pretensioner



* Any inline harness



* K36 SDM



If the reading is erratic while moving the harness, perform the following:



* Inspect each connector terminal for damage or corrosion and repair as necessary.



* Apply Nyogel lubricant 760G to each connector terminal.



* Insure each connector and CPA is correctly seated.



Circuit/System Testing



DTC B0014-B0018 or B0021-B0045



1. Ignition OFF, disconnect the harness connector at the appropriate F105, F106 air bag or F112 seat belt retractor pretensioner.



2. Ignition OFF, disconnect the scan tool, wait 120 seconds, test for greater than 25 ohm between the control circuit terminals listed below:



* F105 Left roof rail airbag terminal 1 and 2



* F105 Right roof rail airbag terminal 1 and 2



* F106 Driver seat side airbag terminal 1 and 2



* F106 Passenger seat side airbag terminal 1 and 2



* F112 Driver seat belt retractor pretensioner terminal 1 and 2



* F112 Passenger seat belt retractor pretensioner terminal 1 and 2



瀚慖f less than the specified range, test for a short between the control circuits, check each connector and CPA to ensure that the shorting



bars are lifted. If the circuits and shorting bars tests normal, replace the K36 SDM.



3. Ignition ON, test for less than 11 V between the control circuit terminals listed below and ground:



* F105 roof rail air bag or F106 seat side air bag control circuit terminal 1



* F105 roof rail air bag or F106 seat side air bag control circuit terminal 2



* F112 seat belt retractor pretensioner control circuit terminal 1



* F112 seat belt retractor pretensioner control circuit terminal 2



瀚慖f greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the K36 SDM.



4. Ignition OFF, test for greater than 25 ohm between the control circuit terminals listed below and ground:



* F105 roof rail air bag or F106 seat side air bag control circuit terminal 1



* F105 roof rail air bag or F106 seat side air bag control circuit terminal 2



* F112 seat belt retractor pretensioner control circuit terminal 1



* F112 seat belt retractor pretensioner control circuit terminal 2



瀚慖f less than the specified range, test the control circuit for a short to ground. If the circuit tests normal, replace the K36 SDM.



5. Install a 3 A fused jumper wire between the control circuit terminals listed below:



* F105 Left roof rail air bag terminal 1 and 2



* F105 Right roof rail air bag terminal 1 and 2



* F106 Driver seat side air bag terminal 1 and 2



* F106 Passenger seat side air bag terminal 1 and 2



* F112 Driver seat belt retractor pretensioner terminal 1 and 2



* F112 Passenger seat belt retractor pretensioner terminal 1 and 2



6. Verify the scan tool Deployment Loop Resistance parameter is less than 2 ohm.

2010 Cadillac Truck SRX AWD V6-3.0L Page 1092

2010 Cadillac Truck SRX AWD V6-3.0L Page 1092



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 P064A



- Fuel Pump Control Module Performance



DTC P1255



- Fuel Pump Control Module Driver Over-temperature



Circuit/System Description



The engine control module (ECM) supplies voltage to the fuel pump control module when the ECM detects that the ignition is on. The voltage from



the ECM to the fuel pump control module remains active for 2 seconds, unless the engine is in crank or run. While this voltage is being received,



the fuel pump control module supplies a varying voltage to the fuel tank pump module in order to maintain the desired fuel rail pressure.



Conditions for Running the DTC



The engine is running.



Conditions for Setting the DTC



The fuel pump control module detects an over-temperature fault.



Action Taken When the DTC Sets



DTCs P064A and P1255 are Type A DTCs.



Conditions for Clearing the DTC



DTCs P064A and P1255 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)



* 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)

2010 Cadillac Truck SRX AWD V6-3.0L Page 1289

2010 Cadillac Truck SRX AWD V6-3.0L Page 1289



P2147, P2150, P2153, P2156, P216B, or P216E



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



P2148, P2151, P2154, P2157, P216C, or P216F



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



Action Taken When the DTC Sets



DTCs P2147, P2148, P2150, P2151, P2153, P2154, P2156, P2157, P216B, P216C, P216E, and P216F are Type A DTCs.



Conditions for Clearing the DTC



DTCs P2147, P2148, P2150, P2151, P2153, P2154, P2156, P2157, P216B, P216C, P216E, and P216F 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)



(See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and Inspection).



* If the condition is intermittent, move the related harnesses and connectors, with the engine operating, while monitoring the scan tool Injector



Control Circuit Status parameters. An Injector Control Circuit Status parameter will change from OK or Not Run to Fault if there is a



condition with the circuit or a connection.



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)



* 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 P0685 or P1682 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. Engine operating, observe the DTC information with a scan tool. DTC P2147, P2148, P2150, P2151, P2153, P2154, P2156, P2157, P216B,



P216C, P216E, or P216F should not set.



3. Observe the scan tool Current Misfire Counter parameters. The Current Misfire Counters should not increment.



4. Ignition ON, observe the scan tool Cylinder 1-6 Injector Control Circuit Status parameters. Verify the Injector Control Circuit Status



parameters display OK.

2010 Cadillac Truck SRX AWD V6-3.0L Page 600

2010 Cadillac Truck SRX AWD V6-3.0L Page 600



* Fuse Block Replacement (See: Maintenance/Fuses and Circuit Breakers/Fuse Block/Service and Repair/Removal and Replacement/Fuse



Block Replacement)



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



B2897



DTC B2897



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 B2897 02



- Steering Column Lock Motor Lock Circuit Short to Ground



DTC B2897 05



- Steering Column Lock Motor Lock Circuit High Voltage/Open



Diagnostic Fault Information



Circuit/System Description



The vehicle theft deterrent subsystem provides the capability to lock or unlock the steering electrically. The steering column lock control module is



allowed to unlock when power mode transitions to a non off power mode and an authenticated driver identification device is present. Once the



column is unlocked, a crank request can be allowed.



Conditions for Running the DTC



* The ignition is in OFF, ACCESSORY or RUN position.



* The system voltage is between 9-16 V.



Conditions for Setting the DTC



B2897 02



The steering column lock enable input circuit is shorted to ground.



B2897 05



The steering column lock enable input circuit is open or shorted to battery.



Action Taken When the DTC Sets



* DTC B2897 is stored in the steering column lock control module memory.



* The steering column lock control module will command the driver information center to display the service column lock warning message.



* The steering column lock control module indicator is ON.



Conditions for Clearing the DTC



The steering column lock control module has received a lock command and detects no longer a malfunction in the steering column lock circuit.



Reference Information



Schematic Reference



Column Lock Schematics (See: Diagrams/Electrical Diagrams/Steering/Steering Column)



Connector End View Reference



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



Description and Operation

Sunday, June 28, 2020

2010 Cadillac Truck SRX AWD V6-3.0L Page 135

2010 Cadillac Truck SRX AWD V6-3.0L Page 135



Circuit/System Description



Stepper motors are used for temperature regulation, air distribution control and recirculation door control.



With the appropriate switches at the Radio/HVAC control, the desired air temperature door position, air distribution door position and recirculation



door position can be put in. The selected values are passed to the HVAC control module via the LIN-Bus. The HVAC control module supplies a 12



V reference voltage to the stepper motors and energizes the 4 stepper motor coils with a pulsed ground signal. The stepper motors put the



appropriate door into the calculated position, in order to reach the put in temperature/position.



Conditions for Running the DTC



* Ignition ON.



* The HVAC control module is ON.



Conditions for Setting the DTC



B023A 02



The stepper motors supply output is shorted to ground.



B0223 01, B022A 01, B0233 01, B0408 01, B0418 01, B0428 01 or B3531 01



At least one control output (of four possible outputs) of the appropriate stepper motor is shorted to voltage when motor starts moving. Faults are not



detected when motor is already running or target position is already reached.



B0223 06, B022A 06, B0233 06, B0408 06, B0418 06, B0428 06 or B3531 06



At least one control output (of four possible outputs) of the appropriate stepper motor is shorted to ground or open when motor starts moving.



Faults are not detected when motor is already running or target position is already reached.



Action Taken When the DTC Sets



B023A 02



* The affected output will be switched off for hardware protection.



* All stepper motors are deactivated.



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



* The affected output will be switched off for hardware protection.



* The affected stepper motor is deactivated.



Conditions for Clearing the DTC



The condition for setting the DTC is no longer present.



Reference Information



Schematic Reference



HVAC Schematics (See: Heating and Air Conditioning/Diagrams/Electrical Diagrams)



Connector End View Reference



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



Description and Operation



Automatic HVAC Description and Operation (See: Heating and Air Conditioning/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

2010 Cadillac Truck SRX AWD V6-3.0L Page 380

2010 Cadillac Truck SRX AWD V6-3.0L Page 380



The air temperature sensors are a 2-wire negative temperature co-efficient thermistor. The vehicle uses the following air temperature sensors:



* Air temperature sensor - left upper



* Air temperature sensor - left lower



* Air temperature sensor - right upper



* Air temperature sensor - right lower



* Air temperature sensor - rear upper (only with CJ4)



* Air temperature sensor - rear lower (only with CJ4)



* A/C evaporator temperature sensor



A signal and low reference circuit enables the sensor to operate. As the air temperature surrounding the sensor increases, the sensor resistance



decreases. The sensor signal voltage decreases as the resistance decreases. The sensor operates within a temperature range between -40 to +85掳C



(-40 to +185掳F). The sensor signal varies between 0-5 V. The HVAC control module converts the signal to a range between 0-255 counts. As the



air temperature increases the count value will decrease. If the HVAC control module detects a malfunctioning sensor, then the control module



software will use a default air temperature value. The default action ensures that the HVAC system can adjust the inside air temperature near the



desired temperature until the condition is corrected.



Conditions for Running the DTC



* Ignition ON.



* The HVAC control module is ON.



Conditions for Setting the DTC



The HVAC control module detects the sensor signal out of range. The signal voltage is less than 0.1 V or greater than 4.9 V for more than 50 ms.



Action Taken When the DTC Sets



The system operates using a default value.



Conditions for Clearing the DTC



The sensor signal is within specified range between 0.1-4.9 V.



Reference Information



Schematic Reference



HVAC Schematics (See: Heating and Air Conditioning/Diagrams/Electrical Diagrams)



Connector End View Reference



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



Description and Operation



Automatic HVAC Description and Operation (See: Heating and Air Conditioning/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



Measure actual temperature using a thermometer at each of the duct temperature sensors. Compare this value to the appropriate scan tool Duct



Actual parameter. The measured temperature should be within 5掳C (9掳F) difference of appropriate Duct Actual parameter value.



Circuit/System Testing



1. Ignition OFF, disconnect the harness connector at the appropriate temperature sensor.



2. Test for less than 10 ohm between the temperature sensor ground circuit terminal B and ground.

2010 Cadillac Truck SRX AWD V6-3.0L Page 916

2010 Cadillac Truck SRX AWD V6-3.0L Page 916



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. Ignition ON, command the Fuel Pressure Regulator ON and OFF with a scan tool while observing the following control circuit status



parameters:



* Fuel Pressure Regulator Control Circuit High Voltage Test Status



* Fuel Pressure Regulator Control Circuit Open Test Status



* Fuel Pressure Regulator Control Circuit Low Voltage Test Status



* Fuel Pressure Regulator High Control Circuit High Voltage Test Status



* Fuel Pressure Regulator High Control Circuit Open Test Status



* Fuel Pressure Regulator High Control Circuit Low Voltage Test Status



Each parameter should toggle between OK and Not Run or Not Run and OK.



3. 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).



4. Command an increase and decrease in fuel rail pressure with a scan tool. Observe the scan tool Fuel Rail Pressure Sensor parameter. The



Fuel Rail Pressure Sensor should increase or decrease with each command.



5. 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 G18 high pressure fuel pump.



2. Ignition OFF, verify that a test lamp does not illuminate between B+ and the low control circuit terminal 1.



瀚慖f the test lamp illuminates, test the low control circuit for a short to ground. If the circuit tests normal, replace the K20 ECM.



3. Ignition ON, verify that a test lamp does not illuminate between ground and the high control circuit terminal 2.



瀚慖f the test lamp illuminates, test the high control circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.



4. Ignition ON, command the Fuel Pressure Regulator ON with a scan tool. Verify that the test lamp illuminates.



瀚慖f the test lamp does not illuminate, test the high control circuit for a short to ground or an open/high resistance. If the circuit tests normal,



replace the K20 ECM.



5. Ignition OFF, connect a test lamp between the low control circuit terminal 1 and B+.



6. Ignition ON, command the Fuel Pressure Regulator ON with a scan tool. Verify that the test lamp illuminates.



瀚慖f the test lamp does not illuminate, test the low control circuit for a short to voltage or an open/high resistance. If the circuit tests normal,



replace the K20 ECM.



7. If all circuits test normal, test or replace the G18 high pressure fuel pump.



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 9-11 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. Measure the resistance between each terminal and the high pressure fuel pump housing. The DMM should display OL.



瀚慖f less than the specified value, replace the G18 high pressure fuel pump.



Repair Instructions



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



* Fuel Pump Replacement (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Pump/Service and Repair/Fuel Pump



Replacement)



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

2010 Cadillac Truck SRX AWD V6-3.0L Page 443

2010 Cadillac Truck SRX AWD V6-3.0L Page 443



DTC Descriptors



DTC B1288 01



- Video Display Mode Control Signal Short to Battery



DTC B1288 02



- Video Display Mode Control Signal Short to Ground



DTC B1288 04



- Video Display Mode Control Signal Open Circuit



Diagnostic Fault Information



Circuit/System Description



The radio can command the seatback video display mode on vehicles equipped with rear seat entertainment (RSE) video. The radio utilizes discreet



mode control circuits to each display to control the screen display mode via a pulse width modulated signal. If the display screen does not receive a



signal, the display screen will operate in a default full screen mode.



Conditions for Running the DTC



* Ignition ON.



* Battery voltage must be between 9-16 volts.



Conditions for Setting the DTC



The DTC will set when the radio detects a short to voltage, short to ground, or an open/high resistance in the video display mode control circuit 400



ms after the radio activates the remote enable circuit.



Action Taken When the DTC Sets

2010 Cadillac Truck SRX AWD V6-3.0L Page 279

2010 Cadillac Truck SRX AWD V6-3.0L Page 279



Circuit/System Description



The system is designed so that when the operator approaches a locked vehicle with the keyless entry transmitter, the keyless entry control module



will detect the keyless entry transmitter and when an exterior door handle is pulled the keyless entry control module will command all doors to



unlock and the door to unlatch allowing the door to be pulled open.



Conditions for Running the DTC



The system voltage is 9-16 V.



Conditions for Setting the DTC



B251A 01



The keyless entry control module detects a short to voltage on the passenger or left rear or right rear door latch motor unlatch low control circuit.



B251A 02



The keyless entry control module detects a short to ground on the passenger or left rear or right rear door latch motor unlatch low control circuit.



B251A 02



The BCM detects a short to ground on the passenger door lock actuator unlock control circuit.



B251B 04



The keyless entry control module detects an open/high resistance in the driver door latch motor unlatch control circuit.



B251B 02



The BCM detects a short to ground on the driver door lock actuator unlock control circuit



B251C 04



The keyless entry control module detects an open/high resistance on the passenger door latch motor unlatch control circuit.



B251D 04



The keyless entry control module detects an open/high resistance on the left rear door latch motor unlatch control circuit.



B251E 04



The keyless entry control module detects an open/high resistance on the right rear door latch motor unlatch control circuit.



Action Taken When the DTC Sets



The affected door will require a pull of the exterior door handle to unlock the door and a second pull of the exterior door handle to open the door.

2010 Cadillac Truck SRX AWD V6-3.0L Page 1353

2010 Cadillac Truck SRX AWD V6-3.0L Page 1353



- 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



DTC P0276



- Cylinder 6 Injector Control Circuit Low Voltage



DTC P0277



- Cylinder 6 Injector Control Circuit High Voltage



Diagnostic Fault Information



Circuit/System Description

2010 Cadillac Truck SRX AWD V6-3.0L Page 506

2010 Cadillac Truck SRX AWD V6-3.0L Page 506



* 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 harness connector at the appropriate driver seat motor listed below for which the DTC set:



* M50 seat front vertical motor



* M55 seat rear vertical motor



* M51 seat horizontal motor



* M56 seat back recline motor



2. Ignition ON, test for B+ between the 12 V reference circuit terminal 4 and ground.



瀚慖f less than the specified value, test the 12 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,



replace the K40 seat memory control module.



3. Test for 0.3 - 2 V between the signal circuit terminal 2 and ground.



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 K40 seat memory control module.



瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K40 seat memory



control module.



4. If all circuits test normal, replace the seat motor.



Repair Instructions



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



* Driver or Passenger Seat Cushion Frame Replacement (See: Body and Frame/Seats/Service and Repair/Removal and Replacement/Driver or



Passenger Seat Cushion Frame Replacement)



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



and programming



Without Memory A45



DTC B1925 or B2170 (Without Memory A45)



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 B1925 02



- Driver Seat Cushion Heater Sensor Circuit Short to Ground



DTC B1925 05



- Driver Seat Cushion Heater Sensor Circuit High Voltage/Open



DTC B2170 02



- Passenger Seat Cushion Heater Sensor Circuit Short to Ground



DTC B2170 05



- Passenger Seat Cushion Heater Sensor Circuit High Voltage/Open



Diagnostic Fault Information

Saturday, June 27, 2020

2010 Cadillac Truck SRX AWD V6-3.0L Page 701

2010 Cadillac Truck SRX AWD V6-3.0L Page 701



* 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 B3849 02



- Driver Exterior Door Handle Switch Circuit Short to Ground



Diagnostic Fault Information



Circuit/System Description



The keyless entry control module supplies a 12V signal to the exterior driver door handle switch. When the driver door handle is activated, the



switch closes and the voltage signal from the keyless entry control module are pulled to ground, this input allows the keyless entry control module



to detect a door open request.



Conditions for Running the DTC



Battery voltage is between 9-16 V.



Conditions for Setting the DTC



The keyless entry control module detects the driver exterior door handle switch signal circuit is shorted to ground or closed for greater than 180 s.



Action Taken When the DTC Sets



The passive entry feature will be inoperative for the driver door and the driver door will not open unless the door is first unlocked by pressing the



appropriate button on the keyless entry transmitter.



Conditions for Clearing the DTC



* The DTC will be current for as long as the fault is present.



* When the fault is no longer present, the DTC will be a history DTC.



* A history DTC will clear after 40 ignition cycles.



Reference Information



Schematic Reference



Door Lock/Indicator Schematics (See: Body and Frame/Locks/Diagrams/Electrical Diagrams/Door Lock/Indicator Schematics)



Connector End View Reference



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



Description and Operation



Power Door Latch Description and Operation (See: Body and Frame/Locks/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

2010 Cadillac Truck SRX AWD V6-3.0L Page 536

2010 Cadillac Truck SRX AWD V6-3.0L Page 536



and programming



With KA6



DTC B2425 or B2430 (With KA6)



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 B2425 0B



- Left Seat Cushion Heater Circuit High Current



DTC B2425 0D



- Left Seat Cushion Heater Circuit High Resistance



DTC B2425 0E



- Left Seat Cushion Heater Circuit Low Resistance



DTC B2430 0B



- Right Seat Cushion Heater Circuit High Current



DTC B2430 0D



- Right Seat Cushion Heater Circuit High Resistance



DTC B2430 0E



- Right Seat Cushion Heater Circuit Low Resistance



Diagnostic Fault Information



Circuit/System Description



The left and right rear heated seats are controlled by the rear seat heating control module that is located behind the rear seat back cushion. When a



rear heated seat is active, the module applies power through a common voltage supply circuit to the seat heater elements. The module controls the



seat temperature by providing a pulse width modulation (PWM) ground through the seat heater element control circuit to the heater elements. The



module then monitors the current flow through the heating elements and the rate of change of the temperature sensor to verify correct heated seat



operation.



Conditions for Running the DTC



* DTC B1325 must not be present.



* The engine must be running.



* The rear seat heating control module must be powered and the heated seat must be enabled.

2010 Cadillac Truck SRX AWD V6-3.0L Page 770

2010 Cadillac Truck SRX AWD V6-3.0L Page 770



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



DTC C0045 5A



- Left Rear Wheel Speed Sensor Circuit Not Plausible



DTC C0050 06



- Right Rear Wheel Speed Sensor Circuit Low Voltage/Open



DTC C0050 0F



- Right Rear Wheel Speed Sensor Circuit Signal Erratic



DTC C0050 18



- Right Rear Wheel Speed Sensor Circuit Low Signal Amplitude



DTC C0050 5A



- Right Rear Wheel Speed Sensor Circuit Not Plausible



Diagnostic Fault Information

2010 Cadillac Truck SRX AWD V6-3.0L Page 1015

2010 Cadillac Truck SRX AWD V6-3.0L Page 1015



1. Ignition OFF, disconnect the harness connector at the B47 fuel pressure sensor.



2. Ignition OFF, test for less than 1 ohm between the low reference circuit terminal 2 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 K27



fuel pump flow control module.



3. Ignition ON, test for 4.8-5.2 V between the B47 fuel pressure sensor 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 K27 fuel pump flow control module.



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 K27 fuel



pump flow control module.



4. Verify the scan tool fuel pressure sensor voltage is less than 1 V.



瀚慖f greater than the specified range, test the signal circuit terminal 1 for a short to voltage. If the circuit tests normal, replace the K27 fuel



pump flow control module.



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



reference 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 K27 fuel pump flow control module.



6. If all circuits test normal, replace the B47 fuel pressure sensor.



Repair Instructions



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



* Fuel Pressure Sensor Replacement - Fuel Injection Fuel Rail (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Pressure



Sensor/Switch/Service and Repair/Fuel Pressure Sensor Replacement - Fuel Injection Fuel Rail)



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



and programming



P018C



DTC P018B-P018D



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 P018B



- Fuel Pressure Sensor Performance



DTC P018C



- Fuel Pressure Sensor Circuit Low Voltage



DTC P018D



- Fuel Pressure Sensor Circuit High Voltage



Diagnostic Fault Information



Circuit/System Description

2010 Cadillac Truck SRX AWD V6-3.0L Page 1535

2010 Cadillac Truck SRX AWD V6-3.0L Page 1535



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.



瀚慖f the DTC resets, replace the ECM.



Repair Instructions



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



* ECM or TCM-Refer to Control Module References (See: Testing and Inspection/Programming and Relearning) for replacement, setup and



programming.



* Perform the Transmission Adaptive Functions (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and



Operation/AF40-6 - Automatic Transmission/Transmission Adaptive Functions).



P0506



DTC P0506 or P0507 (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 P0506



- Idle Speed Low



DTC P0507



- Idle Speed High



Circuit/System Description



The throttle actuator control (TAC) motor is a DC motor that is part of the throttle body assembly. The TAC motor drives the throttle valve. The



engine control module (ECM) controls the TAC motor based on throttle position sensor input. The idle speed is controlled by the ECM based on



various inputs. The ECM commands the TAC motor to open or close the throttle valve in order to maintain the desired idle speed.



Conditions for Running the DTC



* DTCs P0068, P0101, P0102, P0103, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0171, P0172, P0174, P0175, P0222, P0223,



P0261, P0262, P0264, P0265, P0267, P0268. P0270, P0271, P0273, P0274, P0276, P0277, P0300-P0306, P0351-P0356, P0461-P0464,



P0496, P0627, P0628, P0629, P0722, P1516, P2066-P2068, are not set.



* The barometric pressure (BARO) is greater than 70 kPa.



* The engine coolant temperature (ECT) is greater than 60掳C (140掳F).



* The engine run time is greater than 60 seconds.



* The ignition voltage is between 11-18 volts.



* The transmission is not changing gears.



* The torque converter clutch (TCC) is not changing states.



* The intake air temperature (IAT) is warmer than -20掳C (-4掳F).



* The vehicle speed is less than 3 km/h (2 mph).



* The commanded RPM is steady within 25 RPM.



* The engine is idling for greater than 5 seconds.



* The DTCs run when the above conditions are met.



Conditions for Setting the DTC



P0506



The actual engine speed is 94 RPM less than the desired idle speed for 10 seconds.



P0507



The actual engine speed is 188 RPM greater than the desired idle speed for 10 seconds.

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2010 Cadillac Truck SRX AWD V6-3.0L Page 997



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



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.



Conditions for Running the DTC



P0133, P0153, P1133, or P1153



* DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0120, P0121, P0122, P0123, P0128,



P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208, P0220, P0222, P0223, P0442, P0443, P0446, P0449, P0455, P0496, P1516,



P2101, P2119, P2135, P2176 are not set.

Friday, June 26, 2020

2010 Cadillac Truck SRX AWD V6-3.0L Page 788

2010 Cadillac Truck SRX AWD V6-3.0L Page 788



Circuit/System Verification



Verify that DTC C078A is not set.



If the DTC is set, replace the tire pressure sensor locator module.



Repair Instructions



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



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



C0110



DTC C0110



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 C0110 00



- Pump Motor Circuit Malfunction



DTC C0110 04



- Pump Motor Circuit Open



DTC C0110 61



- Pump Motor Circuit Stuck



Diagnostic Fault Information



Circuit/System Description



The pump motor is an integral part of the brake pressure modulator valve assembly, while the pump motor relay is integral to the electronic brake



control module (EBCM). The pump motor relay is not engaged during normal system operation. When the ABS, traction control or stability control



operation is required, the EBCM activates the pump motor relay and turns the pump motor ON.



Conditions for Running the DTC



Ignition ON.



Conditions for Setting the DTC



C0110 00



* An unintentional pump motor activation is detected for 1.785 s.



* An open/high resistance is detected on the pump motor B+ circuit for 1.8 s.



C0110 04



An unintentional pump motor activation is detected for 1.785 s.

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2010 Cadillac Truck SRX AWD V6-3.0L Page 1119



The ECM detects that the MAF Sensor Signal parameter is less than 500 Hz for greater than 10 s.



P0103



The ECM detects that the MAF Sensor Signal parameter is greater than 14,500 Hz for greater than 10 s.



Action Taken When the DTC Sets



DTCs P0102 and P0103 are Type B DTCs.



Conditions for Clearing the MIL/DTC



DTCs P0102 and P0103 are Type B DTCs.



Diagnostic Aids



* A steady or intermittent high resistance of 15 ohm or greater on the ignition 1 voltage circuit will cause the MAF sensor signal to be



increased by as much as 60 g/s.



* Depending on the current ambient temperature, and the vehicle operating conditions, a MAF sensor signal circuit that is shorted to the IAT



signal circuit will cause the MAF sensor signal to be skewed or erratic. Additionally, it may cause a rapid fluctuation in the IAT Sensor



parameter.



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)



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 38522 Variable Signal Generator



Circuit/System Verification



1. Verify that DTCs P0685, P0690 or B1380 are not set.



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).



2. Engine running, observe the scan tool MAF Sensor Signal parameter. The reading should be between 1,700-3,800 Hz depending on the



engine coolant temperature (ECT).



3. A wide open throttle (WOT) acceleration from a stop should cause the MAF sensor parameter on the scan tool to increase rapidly. This



increase should be from 2-6 g/s at idle to greater than 180 g/s at the time of the 1-2 shift.



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. Verify that DTCs P0685, P0690 or B1380 are not set.

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2010 Cadillac Truck SRX AWD V6-3.0L Page 132



Procedures/Connector Repairs/Connector Repairs)



Scan Tool Reference



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



Circuit/System Verification



Note:



* Refer to SIR Service Precautions (See: Restraints and Safety Systems/Air Bag Systems/Service Precautions/Technician Safety Information).



* Inspect all terminals for damage or corrosion when disconnecting connectors. Damage or corrosion in the following requires repair or



replacement of the affected component/connector.



- Seat belt retractor pretensioner



- Passenger instrument panel air bag



- Seat side air bag



- Roof rail air bag



- SDM



- SDM wiring harness connector



- Roof rail air bag wiring harness connector



- Seat side air bag wiring harness connector



- Passenger instrument panel air bag wiring harness connector



- Seat belt retractor pretensioner wiring harness connector



* The connector and connector position assurance (CPA) may seat independent of each other. Both the connector and CPA should seat with an



audible and/or tactile click. The CPA isolates the shorting-bars within the connector allowing the deployment circuit to operate properly.



* If the condition is intermittent or cannot be duplicated, disconnect the connectors and add Nyogel lubricant 760G. This procedure will correct



the high resistance condition due to terminal fretting corrosion.



Observe the scan tool Deployment Loop Resistance parameters while moving the harness near each connector listed below. The reading should stay



consistently between 1.7 and 4.2 ohm without any drop outs or spikes.



* F105 Passenger instrument panel air bag, and Roof rail air bag



* F106 Seat side air bag



* F112 Seat belt retractor pretensioner



* Any inline harness



* K36 SDM



If the reading is erratic while moving the harness, perform the following:



* Inspect each connector terminal for damage or corrosion and repair as necessary.



* Apply Nyogel lubricant 760G to each connector terminal.



* Insure each connector and CPA is correctly seated.



Circuit/System Testing



DTC B0014-B0018 or B0021-B0045



1. Ignition OFF, disconnect the harness connector at the appropriate F105, F106 air bag or F112 seat belt retractor pretensioner.



2. Ignition OFF, disconnect the scan tool, wait 120 seconds, test for greater than 25 ohm between the control circuit terminals listed below:



* F105 Left roof rail airbag terminal 1 and 2



* F105 Right roof rail airbag terminal 1 and 2



* F106 Driver seat side airbag terminal 1 and 2



* F106 Passenger seat side airbag terminal 1 and 2



* F112 Driver seat belt retractor pretensioner terminal 1 and 2



* F112 Passenger seat belt retractor pretensioner terminal 1 and 2



瀚慖f less than the specified range, test for a short between the control circuits, check each connector and CPA to ensure that the shorting



bars are lifted. If the circuits and shorting bars tests normal, replace the K36 SDM.



3. Ignition ON, test for less than 11 V between the control circuit terminals listed below and ground:



* F105 roof rail air bag or F106 seat side air bag control circuit terminal 1



* F105 roof rail air bag or F106 seat side air bag control circuit terminal 2



* F112 seat belt retractor pretensioner control circuit terminal 1



* F112 seat belt retractor pretensioner control circuit terminal 2



瀚慖f greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the K36 SDM.



4. Ignition OFF, test for greater than 25 ohm between the control circuit terminals listed below and ground:

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2010 Cadillac Truck SRX AWD V6-3.0L Page 1231



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 value, 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. Verify none of the following conditions exist:



* Water intrusion in the HO2S harness connector



* Low or high fuel system pressure-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)).



* Fuel that is contaminated-Refer to Alcohol/Contaminants-in-Fuel Diagnosis (Special Tool) (See: Powertrain Management/Fuel Delivery



and Air Induction/Fuel/Testing and Inspection/Alcohol/Contaminants-in-Fuel Diagnosis (Special Tool))Alcohol/Contaminants-in-Fuel



Diagnosis (Without Special Tool) (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component



Tests and General Diagnostics/Alcohol/Contaminants-in-Fuel Diagnosis (Without Special Tool)).



* Fuel saturation of the evaporative emission (EVAP) canister



* Exhaust leaks near the HO2S



* Engine vacuum leaks



瀚慖f any of the above conditions exist, repair as necessary. 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)



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



P0161



DTC P0030, P0036, P0050, P0053, P0054, P0056, P0059, P0060, P0135, P0141, P0155, or P0161 (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 P0030



- HO2S Heater Control Circuit Bank 1 Sensor 1



DTC P0036



- HO2S Heater Control Circuit Bank 1 Sensor 2

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2010 Cadillac Truck SRX AWD V6-3.0L Page 438



interface module connects to the radio, passing along the audio signals. Only the multimedia player interface module can set these DTCs.



The auxiliary audio jack has an internal mechanical detection switch that will connect the detection signal on the auxiliary audio jack to ground



when an auxiliary mini-plug is inserted.



Conditions for Running the DTC



* Ignition in RUN or ACC position.



* The system voltage is at least 9.5 V and no more than 15.5 V.



Conditions for Setting the DTC



* The multimedia player interface module detects a short to battery on the signal circuit terminal 1 or signal circuit terminal 2.



* The multimedia player interface module detects a short to ground on the signal circuit terminal 1 or signal circuit terminal 2.



* All the above conditions are present for greater than 250 mS.



Action Taken When the DTC Sets



No audio is heard from the remote audio device.



Conditions for Clearing the DTC



* The conditions for setting the DTC are no longer present on the auxiliary input signal circuits.



* A history DTC clears after 50 malfunction-free ignition cycles.



Diagnostic Aids



* This DTC may be stored as a history DTC without affecting the operation of the module.



* If stored only as a history DTC and not retrieved as a current DTC, do not replace the module.



Reference Information



Schematic Reference



Radio/Navigation System Schematics (See: Accessories and Optional Equipment/Diagrams/Electrical Diagrams/Radio/Navigation System



Schematics)



Connector End View Reference



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



Description and Operation



Radio/Audio System Description and Operation (See: Accessories and Optional Equipment/Description and Operation/Radio/Audio 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)



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 X1 harness connector at the auxiliary audio jack.



2. Ignition ON, test for less than 1 V between the terminals listed below and ground:



* signal terminal 1



* signal terminal 2



瀚慖f greater than the specified value, test the circuit for a short to voltage. If the circuit tests normal, replace the multimedia player interface



module.



3. Ignition OFF, test for infinite resistance between the terminals listed below and ground: