2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 717

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 717

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

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

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

Repairs/Wiring Repairs)

Scan Tool Reference

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

Circuit/System Verification

Ignition ON, command the appropriate actuator in both directions with a scan tool. The scan tool door position parameter reading should be

between 3 and 253 counts.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate actuator.

2. Test for less than 10 ohms between the low reference circuit terminal 7 and ground.

瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance.

3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal 10 and ground.

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

瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage.

4. Verify the appropriate scan tool parameter is greater than 250 counts.

瀚慖f greater than the specified range, test the signal circuit terminal 9 for a short to ground.

5. Install a 3-amp fused jumper wire between the signal circuit terminal 9 and the low reference circuit terminal. Verify the appropriate scan

tool parameter is less than 4 counts.

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

6. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 5 and ground.

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

7. Install a DMM between the actuator control circuit terminal 6 and ground. While monitoring the DMM, use the scan tool to command the

appropriate actuator from one direction to the other. The voltage on the control circuit should move from 0 volts in one direction to 5 volts in

the other direction and 2.5 volts in the at rest state.

瀚慖f the voltage does not change, test the control circuit for an open, short to voltage or short to ground. If circuit tests normal replace the

HVAC control module.

8. If all circuits test normal, replace the actuator.

Repair Instructions

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

* Air Inlet Valve Actuator Replacement (See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service and Repair/HVAC -

Automatic/Air Inlet Valve Actuator Replacement)

* Mode Valve Actuator Replacement (See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service and Repair/HVAC -

Automatic/Mode Valve Actuator Replacement)

* Temperature Valve Actuator Replacement - Left Side (See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service and

Repair/HVAC - Automatic/Temperature Valve Actuator Replacement - Left Side)

* Temperature Valve Actuator Replacement - Right Side (See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service

and Repair/HVAC - Automatic/Temperature Valve Actuator Replacement - Right Side)

* Auxiliary Temperature Valve Actuator Replacement (Behr) (See: Heating and Air Conditioning/Air Door/Air Door Actuator /

Motor/Service and Repair/HVAC - Automatic/Auxiliary Temperature Valve Actuator Replacement (Behr))Auxiliary Temperature Valve

Actuator Replacement (Delphi) (See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service and Repair/HVAC -

Automatic/Auxiliary Temperature Valve Actuator Replacement (Delphi))

* Auxiliary Mode Valve Actuator Replacement (Behr) (See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service and

Repair/HVAC - Automatic/Auxiliary Mode Valve Actuator Replacement (Behr))Auxiliary Mode Valve Actuator Replacement (Delphi) (

See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service and Repair/HVAC - Automatic/Auxiliary Mode Valve

Actuator Replacement (Delphi))

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

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 981

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 981

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

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

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

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for Scan Tool Information

Circuit/System Verification

Ignition ON, observe the scan tool Position Sensor Data parameters. The readings should vary between 0.35-4.75 volts while the vehicle is jounced.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the applicable suspension position sensor.

2. Ignition OFF, test for less than 5 ohm between the low reference circuit terminal C and ground.

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

module.

3. Ignition ON, test for 4.75-5.25 volts between the 5 volt reference circuit terminal A and ground.

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

replace the ESC module.

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

module.

4. Verify the applicable scan tool position sensor parameter is less than 0.35 volts.

瀚慖f greater than the specified range, test the signal circuit terminal B for a short to voltage. If all circuits test normal replace the ESC

module.

5. Install a 3A fused jumper wire between the signal circuit terminal B and the 5 volt reference circuit terminal A. Verify the scan tool position

sensor parameter is greater than 4.75 volts.

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

ESC module.

6. If all circuits test normal, test or replace the applicable suspension position sensor.

Component Testing

1. Install a 3A fused jumper wire between the 5 volt reference terminal A and 5 volts. Install a jumper wire between the low reference terminal

C and ground.

2. Sweep the suspension position sensor through the entire range while monitoring the voltage between the signal terminal B and the low

reference terminal C. The range should vary between 0.35-4.75 volts without any spikes or dropouts.

瀚慖f not within the specified range or if it is erratic, replace the applicable suspension position sensor.

Repair Instructions

* Electronic Suspension Front Position Sensor Replacement (See: Sensors and Switches/Sensors and Switches - Steering and

Suspension/Sensors and Switches - Suspension/Ride Height Sensor/Service and Repair/Electronic Suspension Front Position Sensor

Replacement)

* Electronic Suspension Rear Position Sensor Replacement - Left Side (See: Sensors and Switches/Sensors and Switches - Steering and

Suspension/Sensors and Switches - Suspension/Ride Height Sensor/Service and Repair/Electronic Suspension Rear Position Sensor

Replacement - Left Side)

* Electronic Suspension Rear Position Sensor Replacement - Right Side (See: Sensors and Switches/Sensors and Switches - Steering and

Suspension/Sensors and Switches - Suspension/Ride Height Sensor/Service and Repair/Electronic Suspension Rear Position Sensor

Replacement - Right Side)

* Suspension Position Calibration (With Z95) (See: Steering and Suspension/Suspension/Suspension Control ( Automatic - Electronic

)/Service and Repair/Suspension Position Calibration (With Z95))Suspension Position Calibration (Without Z95) (See: Steering and

Suspension/Suspension/Suspension Control ( Automatic - Electronic )/Service and Repair/Suspension Position Calibration (Without Z95))

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

Repair Verification

1. Install any components or connectors that have been removed or replaced during diagnosis.

2. Perform any adjustment, programming or setup procedures that are required when a component or module is removed or replaced.

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 326

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 326

* 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 harness connector at the steering wheel controls switch - left.

2. Ignition ON, verify that a test lamp illuminates between the signal circuit terminal 9 and B+.

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

replace the BCM.

3. If all circuits test normal, test or replace the steering wheel controls switch - left.

Repair Instructions

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

* Steering Wheel Control Switch Assembly Replacement (See: Accessories and Optional Equipment/Sensors and Switches - Accessories and

Optional Equipment/Steering Mounted Controls Assembly/Service and Repair)

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

B0958

DTC B0958, B0959, B0960, or B0961

Diagnostic Instructions

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

Check - Vehicle) prior to using the 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 B0958 01

- Parking Aid Rear Sensor 1 Circuit Short to Battery

DTC B0958 06

- Parking Aid Rear Sensor 1 Circuit Short to Ground or Open

DTC B0958 08

- Parking Aid Rear Sensor 1 Circuit Signal Invalid

DTC B0958 21

- Parking Aid Rear Sensor 1 Circuit Incorrect Period

DTC B0958 3A

- Parking Aid Rear Sensor 1 Circuit Incorrect Component Installed

DTC B0959 01

- Parking Aid Rear Sensor 2 Circuit Short to Battery

DTC B0959 06

- Parking Aid Rear Sensor 2 Circuit Short to Ground or Open

DTC B0959 08

- Parking Aid Rear Sensor 2 Circuit Signal Invalid

DTC B0959 21

- Parking Aid Rear Sensor 2 Circuit Incorrect Period

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 840

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 840

* 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 References

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

Circuit/System Verification

Verify DTC C056E is not set.

If the DTC is set, program the control module. If the DTC resets, replace the 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 control module replacement, setup, and programming

Power Steering

DTC C056E

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) provide an overview of each diagnostic category.

DTC Descriptors

DTC C056E 42

- ECU Hardware Performance Calibration Data Set Not Programmed

DTC C056E 4B

- ECU Software Performance Calibration Not Learned

Circuit/System Description

After replacement of the power steering control module (PSCM), the PSCM must be configured with the proper tuning profile using the service

programming system (SPS).

After replacement of the PSCM, power steering motor, or steering gear, the steering position/torque sensor calibration procedure must be

performed.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

DTC C056E 42

This DTC will set if the PSCM has not undergone SPS programming.

DTC C056E 4B

This DTC will set if the PSCM, motor or torque sensor has not been calibrated using the steering position / torque sensor calibration procedure.

Actions Taken When DTC Sets

* DTC is stored in memory.

* The driver information center (DIC) displays the SERVICE POWER STEERING warning message.

* Steering assist is set to a default level.

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 760

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 760

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

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

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

Repairs/Wiring Repairs)

Scan Tool Reference

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

Circuit/System Verification

Ignition ON, command the appropriate actuator in both directions with a scan tool. The scan tool door position parameter reading should be

between 3 and 253 counts.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate actuator.

2. Test for less than 10 ohms between the low reference circuit terminal 7 and ground.

瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance.

3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal 10 and ground.

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

瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage.

4. Verify the appropriate scan tool parameter is greater than 250 counts.

瀚慖f greater than the specified range, test the signal circuit terminal 9 for a short to ground.

5. Install a 3-amp fused jumper wire between the signal circuit terminal 9 and the low reference circuit terminal. Verify the appropriate scan

tool parameter is less than 4 counts.

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

6. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 5 and ground.

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

7. Install a DMM between the actuator control circuit terminal 6 and ground. While monitoring the DMM, use the scan tool to command the

appropriate actuator from one direction to the other. The voltage on the control circuit should move from 0 volts in one direction to 5 volts in

the other direction and 2.5 volts in the at rest state.

瀚慖f the voltage does not change, test the control circuit for an open, short to voltage or short to ground. If circuit tests normal replace the

HVAC control module.

8. If all circuits test normal, replace the actuator.

Repair Instructions

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

* Air Inlet Valve Actuator Replacement (See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service and Repair/HVAC -

Automatic/Air Inlet Valve Actuator Replacement)

* Mode Valve Actuator Replacement (See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service and Repair/HVAC -

Automatic/Mode Valve Actuator Replacement)

* Temperature Valve Actuator Replacement - Left Side (See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service and

Repair/HVAC - Automatic/Temperature Valve Actuator Replacement - Left Side)

* Temperature Valve Actuator Replacement - Right Side (See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service

and Repair/HVAC - Automatic/Temperature Valve Actuator Replacement - Right Side)

* Auxiliary Temperature Valve Actuator Replacement (Behr) (See: Heating and Air Conditioning/Air Door/Air Door Actuator /

Motor/Service and Repair/HVAC - Automatic/Auxiliary Temperature Valve Actuator Replacement (Behr))Auxiliary Temperature Valve

Actuator Replacement (Delphi) (See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service and Repair/HVAC -

Automatic/Auxiliary Temperature Valve Actuator Replacement (Delphi))

* Auxiliary Mode Valve Actuator Replacement (Behr) (See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service and

Repair/HVAC - Automatic/Auxiliary Mode Valve Actuator Replacement (Behr))Auxiliary Mode Valve Actuator Replacement (Delphi) (

See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service and Repair/HVAC - Automatic/Auxiliary Mode Valve

Actuator Replacement (Delphi))

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

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1200

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1200

* 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

DT-48493 Jumper Harness, 24 terminal

Circuit/System Verification

P0A2B and P0A31

1. Allow the vehicle to cool to ambient temperature by leaving the ignition OFF for 6 or more hours.

2. Ignition ON, observe Motor 1 temperature, Motor 2 temperature, and phase U, V, W inverter temperature scan tool parameters.

瀚慣he Motor 1 Temperature, Motor 2 Temperature, and phase U, V, W inverter temperature parameters should be within 28掳C (50掳F) of

each other and ambient temperature.

P0A2C, P0A2D, P0A32, and P0A33

Ignition ON, observe the MCM motor temperature scan tool parameter.

The motor temperature parameter should be between 0.29V and 4.42V.

Circuit/System Testing

1. Ignition OFF, disconnect the transmission X176 24-way harness connector.

Important: The ignition must be ON to test the low reference circuit. Other DTCs will set with the X176 connector disconnected.

2. Ignition ON, test the vehicle harness side for less than 8 ohms between the low reference circuit terminal 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 PIM.

3. Ignition ON, verify the scan tool motor temperature sensor parameter is greater than 4.42V.

瀚慖f less than the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the PIM.

4. Install a 3-amp fused jumper wire between the signal circuit terminal and the low reference circuit terminal. Verify the scan tool motor

temperature sensor parameter is less than 0.29V.

Important: If a short to voltage is found, test the motor temperature sensor for damage.

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

replace the PIM.

5. Connect the DT-48493 to the X176 transmission 24-way connector at the transmission. Measure and record the resistance between the sensor

signal and low reference terminals. Compare the actual sensor and circuit resistance to the expected sensor resistance. Refer to Temperature

Versus Resistance ().

瀚慖f the resistance is near the expected value, test the transmission internal harness signal circuit for a short to ground. If the circuit tests

normal, replace the drive motor w/generator.

瀚慖f the resistance is not near the expected value, test the transmission internal harness signal and low reference circuits for an open or

shorted together condition. If the circuits test normal, replace the drive motor w/generator.

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 PIM replacement, setup, and programming

* Transmission Control Wiring Harness Extension Harness Removal (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Service and Repair/Overhaul/2ML70 - Automatic Transmission/5. Transmission Control Wiring Harness Extension

Harness Removal)

* Drive Motor with Generator Assembly Removal - 1st Position (See: Transmission and Drivetrain/Automatic

2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1863

2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1863

* 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. Engine idling, observe the scan tool IAT Sensor parameter. The reading should be between -38 to +149锟斤拷C (-36 to +300F) depending on the

current ambient temperature and the vehicle operating conditions.

2. Operate the vehicle within the Conditions for Running the DTC to verify that 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 MAF/IAT sensor.

2. Ignition OFF, all vehicles systems OFF, this may take up to for 2 min, test for less than 5 ohm between the IAT low reference circuit terminal

A and ground.

锟斤拷If greater than the specified range, test the IAT low reference circuit for an open/high resistance. If the circuit tests normal, replace the

ECM.

3. Ignition ON, verify the scan tool IAT parameter is colder than -39锟斤拷C (-38锟斤拷F).

锟斤拷If warmer than the specified range, test the IAT signal circuit terminal B for a short to ground. If the circuit tests normal, replace the

ECM.

4. Install a 3 A fused jumper wire between the IAT signal circuit terminal B and ground. Verify the scan tool IAT parameter is warmer than 149

锟斤拷C (300锟斤拷F).

锟斤拷If colder than the specified range, test the IAT signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal,

replace the ECM.

5. If all circuits test normal, test or replace the MAF/IAT sensor.

Component Testing

Measure and record the resistance of the IAT sensor at various ambient temperatures, and then compare those measurements to the Temperature

Versus Resistance (See: Powertrain Management/Computers and Control Systems/Specifications/Temperature Versus Resistance) table.

Repair Instructions

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

* Mass Airflow Sensor with Intake Air Temperature Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Air

Flow Meter/Sensor/Service and Repair)

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

P0116

DTC P0116 (Without L96)

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.

2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1852

2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1852

* 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-35555 Metal Mityvac

* J-23738-A Mityvac

Circuit/System Verification

1. If DTC P0641 or P0651 are set, refer to DTC P0641 or P0651 (ECM) (See: P Code Charts/P0641).

2. Verify that restrictions do not exist in the exhaust system. Refer to Restricted Exhaust (See: Engine, Cooling and Exhaust/Exhaust

System/Testing and Inspection/Restricted Exhaust).

3. Verify that the engine is in good mechanical condition. Refer to Symptoms - Engine Mechanical (See: Engine, Cooling and

Exhaust/Engine/Testing and Inspection/Symptom Related Diagnostic Procedures/Symptoms - Engine Mechanical) for the 4.8L, 5.3L, 6.0L

and 6.2L engine.

4. Ignition OFF for 90 s, determine the current vehicle testing altitude. Ignition ON, observe the scan tool BARO Sensor parameter. Compare

the parameter to the Altitude Versus Barometric Pressure (See: Powertrain Management/Computers and Control

Systems/Specifications/Altitude Versus Barometric Pressure) table. The BARO sensor pressure parameter should be within the specified

range indicated in the table.

5. A skewed MAP sensor will also cause the first and second intake manifold models to disagree with the actual MAP sensor measurements.

Use the scan tool and compare the MAP Sensor parameter to a known good vehicle under various operating conditions. The readings should

be within 3 kPa of the known good vehicle.

6. Ignition ON, observe the scan tool MAP sensor parameter. Start the engine. The MAP Sensor parameter should change.

锟斤拷If the vehicle passes the Circuit System Verification Test, operate the vehicle within the Conditions for Running the DTC. You may also

operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records list.

Circuit/System Testing

Note: All electrical components and accessories must be turned OFF and allowed to power down.

1. Verify the integrity of the air induction system by inspecting for the following conditions:

* Any damaged components

* Loose or improper installation

* Improperly routed vacuum hoses

* Any vacuum leak

* Any type of restriction

* MAP sensor seal that is missing or damaged

2. Verify that restrictions do not exist in the MAP sensor vacuum source.

3. Verify that restrictions do not exist in the exhaust system. Refer to Restricted Exhaust (See: Engine, Cooling and Exhaust/Exhaust

System/Testing and Inspection/Restricted Exhaust).

4. Ignition OFF, disconnect the MAP harness connector at the MAP sensor.

5. Ignition OFF for 90 s, test for less than 5 ohm between the low reference circuit terminal A and ground.

锟斤拷If greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.

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

锟斤拷If 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 ECM.

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

7. Verify the scan tool MAP Sensor parameter is less than 12 kPa.

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

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

Sensor parameter is greater than 103 kPa.

2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1568

2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1568

* 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

Inspect for ECM P0335 or ECM P0336. With the engine running, observe the hybrid powertrain control module (HPCM) Engine Speed parameter

with a scan tool. The parameter should display the current engine speed, matching the tachometer and/or the ECM Engine Speed parameter.

If ECM DTCs P0335 or P0336 are set, diagnose them prior to diagnosing the HPCM DTC.

If the HPCM Engine Speed parameter displays a value other than the current engine speed, continue with Circuit/System Testing.

Circuit/System Testing

Attempt to crank and start the engine. Perform the appropriate diagnostic procedure as necessary.

Diagnosis if the Engine Does NOT Start

1. Ignition OFF, disconnect the CKP sensor connector.

2. Ignition ON, test for 4.8-5.2 volts on the CKP signal circuit, from the CKP connector terminal A and ground.

锟斤拷If within the specified range, reconnect the CKP connector and perform ECM DTC P0335 diagnostic procedure.

3. Ignition OFF, disconnect PIM connector X1.

4. Ignition ON, test for 4.8-5.2 volts on the CKP signal circuit, from the CKP sensor connector terminal A and ground.

锟斤拷If within the specified range, replace the drive motor generator power inverter control module (PIM).

5. Test the CKP signal circuit between CKP connector terminal A and PIM connector X1 terminal 26 for a short to ground if less than the

specified value or a short to voltage if greater than the specified value.

锟斤拷If the circuit tests normal, reconnect all connectors and perform ECM DTC P0335 diagnostic procedure.

Diagnosis if the Engine Starts

Note: Diagnose ECM DTCs P0335 and P0336 prior to performing this procedure.

1. Ignition OFF, disconnect PIM connector X1 and the CKP sensor connector.

2. Test for less than 5 ohms on the CKP low reference circuit, from connector X1 terminal 35 and ground.

锟斤拷If greater than the specified value, repair the low reference circuit for an open/high resistance.

3. Ignition ON, test for 4.8-5.2 volts on the CKP signal circuit, from the connector X1 terminal 26 and ground.

锟斤拷If less than the specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the drive motor

generator power inverter control module (PIM).

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 PIM replacement, programming, and setup

P1AC7

DTC P1AC6 or P1AC7

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.

2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1200

2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1200

* 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

DT-48493 Jumper Harness, 24 terminal

Circuit/System Verification

P0A2B and P0A31

1. Allow the vehicle to cool to ambient temperature by leaving the ignition OFF for 6 or more hours.

2. Ignition ON, observe Motor 1 temperature, Motor 2 temperature, and phase U, V, W inverter temperature scan tool parameters.

锟斤拷The Motor 1 Temperature, Motor 2 Temperature, and phase U, V, W inverter temperature parameters should be within 28锟斤拷C (50锟斤拷F) of

each other and ambient temperature.

P0A2C, P0A2D, P0A32, and P0A33

Ignition ON, observe the MCM motor temperature scan tool parameter.

The motor temperature parameter should be between 0.29V and 4.42V.

Circuit/System Testing

1. Ignition OFF, disconnect the transmission X176 24-way harness connector.

Important: The ignition must be ON to test the low reference circuit. Other DTCs will set with the X176 connector disconnected.

2. Ignition ON, test the vehicle harness side for less than 8 ohms between the low reference circuit terminal and ground.

锟斤拷If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the PIM.

3. Ignition ON, verify the scan tool motor temperature sensor parameter is greater than 4.42V.

锟斤拷If less than the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the PIM.

4. Install a 3-amp fused jumper wire between the signal circuit terminal and the low reference circuit terminal. Verify the scan tool motor

temperature sensor parameter is less than 0.29V.

Important: If a short to voltage is found, test the motor temperature sensor for damage.

锟斤拷If greater than the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal,

replace the PIM.

5. Connect the DT-48493 to the X176 transmission 24-way connector at the transmission. Measure and record the resistance between the sensor

signal and low reference terminals. Compare the actual sensor and circuit resistance to the expected sensor resistance. Refer to Temperature

Versus Resistance ().

锟斤拷If the resistance is near the expected value, test the transmission internal harness signal circuit for a short to ground. If the circuit tests

normal, replace the drive motor w/generator.

锟斤拷If the resistance is not near the expected value, test the transmission internal harness signal and low reference circuits for an open or

shorted together condition. If the circuits test normal, replace the drive motor w/generator.

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 PIM replacement, setup, and programming

* Transmission Control Wiring Harness Extension Harness Removal (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Service and Repair/Overhaul/2ML70 - Automatic Transmission/5. Transmission Control Wiring Harness Extension

Harness Removal)

* Drive Motor with Generator Assembly Removal - 1st Position (See: Transmission and Drivetrain/Automatic