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Sunday, August 2, 2020

2010 Cadillac Truck SRX AWD V6-3.0L Page 1339

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)

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2. Verify the following conditions do not exist.

* A loose or broken vehicle accessory

* A loose or broken accessory bracket

* Excessive engine mechanical noise

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

3. Replace the K20 ECM if no external knock sensor circuit issues exist.

P0325, P0327, P0328, P0330, P0332, and P0333

1. Ignition OFF, disconnect the affected B68 KS.

2. Verify the affected B68 KS is properly tightened, refer to Fastener Tightening Specifications (See: Powertrain Management/Specifications).

3. Ignition OFF, with appropriate length jumper wires, connect the B68A KS1 harness to the B68B KS2 sensor and the B68B KS2 harness to

the B68A KS1 sensor.

4. Monitor the DTCs using a scan tool. Operate the vehicle within the conditions for running the DTC. Verify the fault does not follow the

sensor in question.

瀚慖f the fault follows the sensor in question, replace the appropriate B68 KS.

5. Ignition OFF, remove the jumper wires from the previous step.

6. Ignition ON, measure for 1-4 V between each of the following circuits and ground on the K20 ECM side of the harness connector:

* The B68 KS signal circuit, terminal A or 1

* The B68 KS signal circuit, terminal B or 2

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

K20 ECM.

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

7. Test for intermittent or poor connections at the ECM, B68 KS, and in-line connectors where present.

8. If all circuits test normal, replace the K20 ECM.

P06B6 or P06B7

1. Using a scan tool, verify the following DTCs are not set: P0325, P0327, P0328, P0330, P0332, and P0333.

瀚慖f any of the DTCs are set, diagnose them first.

2. DTCs P06B6 and P06B7 indicate an internal ECM circuitry failure. Verify the external knock sensor circuits and connectors for proper

condition.

瀚慖f no external knock sensor circuit issues exist, replace the K20 ECM.

Repair Instructions

* Knock Sensor Replacement - Bank 1 (See: Powertrain Management/Computers and Control Systems/Knock Sensor/Service and

Repair/Knock Sensor Replacement - Bank 1)

* Knock Sensor Replacement - Bank 2 (See: Powertrain Management/Computers and Control Systems/Knock Sensor/Service and

Repair/Knock Sensor Replacement - Bank 2)

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

Repair Verification

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

P0333

DTC P0324-P0328, P0330-P0333, P06B6, or P06B7 (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.

Saturday, August 1, 2020

2010 Cadillac Truck SRX AWD V6-3.0L Page 1128

* For equivalent regional tools, refer to Special Tools (See: Powertrain Management/Computers and Control Systems/Tools and Equipment).

Circuit/System Verification

1. Verify that DTC P0641, P0651, or P0697 is not set.

瀚慖f any of the DTCs are set refer to DTC P0641, P0651, P0697, or P06A3 (LF1) (See: P Code Charts/P0641/ECM).

2. Ignition ON, observe the scan tool MAP Sensor parameter. The reading should be between 0.20-4.80 V.

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 for 90 s, disconnect the harness connector at the B74 MAP sensor.

2. Test for less than 5 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 K20

ECM.

3. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 1 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. Verify the scan tool MAP Sensor parameter is less than 1 kPa (0.2 psi).

瀚慖f greater than the specified range, test the signal circuit terminal 3 for a short to voltage. If the circuit tests normal, replace the K20 ECM.

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

Sensor parameter is greater than 127 kPa (18.4 psi).

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.

6. If the circuits test normal, test or replace the B74 MAP sensor.

Component Testing

Note: You must perform the Circuit/System Testing in order to verify the integrity of the MAP sensor circuits before proceeding with the

Component Testing.

Erratic Signal Test

1. Ignition OFF, remove the B74 MAP sensor.

2. Install a 3 A fused jumper wire between the 5 V reference circuit terminal 1 and the corresponding terminal of the B74 MAP sensor.

3. Install a jumper wire between the low reference circuit terminal 2 of the B74 MAP sensor and ground.

4. Install a jumper wire at terminal 3 of the B74 MAP sensor.

5. Connect a DMM between the jumper wire from terminal 3 of the B74 MAP sensor and ground.

6. Ignition ON, with the J 23738-A - Mityvac or the J 35555 - Metal Mityvac , slowly apply vacuum to the sensor while observing the voltage

on the DMM. The voltage should vary between 0-5 V without any spikes or dropouts.

瀚慖f the voltage reading is erratic, replace the B74 MAP sensor.

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

P0112

DTC P0112, P0113, or P0114 (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

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DTC P0503

- Vehicle Speed Sensor Circuit Intermittent

Circuit/System Description

The transmission control module (TCM) provides the engine control module (ECM) vehicle speed information through the high-speed

communication on the controller area network (CAN). Vehicle speed is produced by the alternating current (AC) generated through the

transmission output shaft speed (OSS) sensor as the output shaft rotates. The ECM continuously monitors the vehicle speed signal supplied by the

TCM.

Conditions for Running the DTC

* Engine coolant temperature is more than 39.8掳C (104掳F).

* No engine coolant temperature DTC is set.

* No engine speed sensor DTC is set.

* The DTCs run continuously once the above condition is met.

Conditions for Setting the DTC

P0501

The ECM detects the CAN signal is not valid for more than 2 s.

P0503

The ECM detects the vehicle speed is greater than 275 km/h (171 MPH) for more than 0.2 s.

Action Taken When the DTC Sets

* DTC P0501 is a Type C DTC.

* DTC P0503 is a Type B DTC.

Conditions for Clearing the DTC

* DTC P0501 is a Type C DTC.

* DTC P0503 is a Type B DTC.

Reference Information

Schematic Reference

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

Diagrams)

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)

Description and Operation

Transmission Component and System Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/AF40-6 - Automatic Transmission/Transmission Component and System Description)

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

2010 Cadillac Truck SRX AWD V6-3.0L Page 942

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

* Electronic Component Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6T70/6T75 - Automatic Transmission/Electronic Component Description) for control solenoid valve assembly

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. Engine idling at normal operating temperature, verify the scan tool TCM Power up Temperature parameter is between -59 and +165掳C (-74

and +329掳F).

2. Operate the vehicle at 64 km/h (40 mph) for 10 minutes. Monitor the TCM Temperature, TCM Power up Temperature, and the Trans. Fluid

Temp. parameters with a scan tool. The TCM Temperature and the Trans. Fluid Temp. parameters should be within 20掳C (36掳F) of each

other, and the TCM Temperature and TCM Power up Temperature parameters should be within 10掳C (18掳F) of each other.

瀚慖f the TCM Temperature and TCM Power up Temperature parameters are not within 10掳C (18掳F), or the TCM Power up Temperature

and Trans. Fluid Temp. parameters are not within 20掳C (36掳F), replace the control solenoid valve assembly.

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.

Repair Instructions

Note:

* Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and

Inspection/Programming and Relearning) following all transmission related repairs

* Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (See: Transmission

and Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/6T70/6T75 - Automatic

Transmission/Control Solenoid Valve and Transmission Control Module Assembly Inspection).

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

Control Module References (See: Testing and Inspection/Programming and Relearning) for control solenoid valve assembly replacement, setup,

and programming

P06AE

DTC P06AC-P06AE

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 P06AC

- Transmission Control Module (TCM) Power Up Temperature Sensor Performance

DTC P06AD

- Transmission Control Module (TCM) Power Up Temperature Sensor Circuit Low Voltage

DTC P06AE

- Transmission Control Module (TCM) Power Up Temperature Sensor Circuit High Voltage

Circuit/System Description

The transmission control module (TCM) power up temperature sensor is located inside of the control solenoid valve assembly, which has no

serviceable components. The TCM power up temperature sensor provides the temperature of the TCM when the TCM power is on. This

temperature reading is used in various shifting and diagnostic routines and also to protect the control solenoid valve assembly and TCM. This fault

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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

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* 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 P219A

- Air Fuel Imbalance Bank 1

DTC P219B

- Air Fuel Imbalance Bank 2

Circuit/System Description

The Air Fuel Imbalance diagnostic detects a rich or lean cylinder to cylinder air/fuel ratio imbalance in each bank. The diagnostic monitors the

pre-catalyst heated oxygen sensor (HO2S) signal's frequency and amplitude characteristics by calculating an accumulated voltage over a

predetermined sample period. An imbalance is indicated when multiple samples of the accumulated voltage are consistently higher than the desired

value.

Conditions for Running the DTC

* DTCs P0053, P0059, P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0116, P0117, P0118, P0125, P0128, P0131, P0132, P0133,

P0134, P0135, P0151, P0152, P0153, P0154, P0155, P0178, P0179, P0201-P0208, P0300, P0301-P0308, P0411, P0442, P0443, P0446,

P0449, P0452, P0453, P0455, P0496, P0606, P1133, P1153, P1516, P2101, P2135, P2176, P2269, P2440, P2444, P2A00, P2A03 are not set.

* The device control is not active.

* The intrusive diagnostics are not active.

* The engine overspeed protection is not active.

* Reduced power mode, ETC DTC, is not active.

* The power take-off (PTO) is not active.

* The traction control is not active.

* The fuel control is in air-fuel Closed Loop.

* The system voltage is more than 10 V, or less than 18 V.

* The engine coolant temperature (ECT) is warmer than -20掳C (-4掳F).

* The engine speed is greater than 350 RPM, but less than 6,000 RPM.

* The mass air flow is greater than 11 g/s, but less than 510 g/s.

* Percent ethanol is less than 87 %.

Conditions for Setting the DTC

Multiple samples of the pre-catalyst HO2S accumulated voltage are consistently greater than the desired value.

Action Taken When the DTC Sets

DTCs P219A and P219B are Type B DTCs.

Conditions for Clearing the MIL/DTC

DTCs P219A and P219B are Type B DTCs.

Diagnostic Aids

* The air fuel imbalance diagnostic is very sensitive to heated oxygen sensor (HO2S) design. A non-OE sensor or an incorrect part number

may set a false DTC.

* Monitoring the misfire current counters, or misfire graph, may help to isolate the cylinder that is causing the condition.

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)

* Troubleshooting with a Test Lamp (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Circuit Testing/Troubleshooting with a Test Lamp)