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Sunday, December 1, 2019

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1288

DTCs P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, and P0393 are Type B DTCs.

Conditions for Clearing the DTC

DTCs P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, and P0393 are Type B DTCs.

Diagnostic Aids

The following conditions can also set the DTC:

* Physical damage to the camshaft position sensor or the reluctor wheel

* Excessive play or looseness of the camshaft position sensor or the reluctor wheel

* Improper installation of the camshaft position sensor or the reluctor wheel

* Foreign material passing between the camshaft position sensor and the reluctor wheel

* Excessive air gap between the camshaft position sensor and the reluctor wheel

* The cylinder 1 intake camshaft position sensor is used for injector and ignition system synchronization. A stalling condition will occur if the

CMP sensor signal is intermittent and a DTC will not set. Inspect all cylinder 1 intake camshaft position sensor circuits for poor connections.

Reference Information

Schematic Reference

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

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

Connector End View Reference

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

Description and Operation

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

Actuator System)

Electrical Information Reference

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

Testing/Circuit Testing)

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

Procedures/Connector Repairs/Connector Repairs)

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

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

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

Repairs/Wiring Repairs)

DTC Type Reference

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

(DTC) Type Definitions)

Scan Tool Reference

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

Circuit/System Verification

1. Ignition ON, observe the DTC information with a scan tool. DTC P0651, P0652 or P0653 should not be set.

瀚慖f a DTC is set, refer to DTC P0641-P0643, P0651-P0653, or P0697-P0699 (ECM, LAU) ( See: P Code Charts/P0641/ECM).

2. Engine idling, observe the DTC information with a scan tool. DTC P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368,

P0391, P0392, or P0393 should not set.

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, remove the fuse that supplies B+ to terminal 56-X2 of the ECM.

2. Disconnect the harness connector at the appropriate camshaft position sensor.

Note: The control module or the sensor may be damaged if the circuit is shorted to B+ voltage.

3. Test for 5 ohm or less between the low reference circuit terminal 1 and ground.

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 605

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 605

Circuit/System Description

The front seat heating elements are controlled by a common high current relay internal to the heated seat module (HSM) and on the low side by

individual element control circuits. The HSM connects the seat heater element supply voltage circuits to a common reference point. This reference

point is biased to approximately 2.5 V. Before the HSM will allow heated seat operation, it checks to see if the heating element supply voltage

circuits and control circuits are shorted to ground or battery voltage. Once the HSM verifies that it is not closing to a shorted heating element, it

allows heated seat operation. After which it continues to monitor for a shorted circuit.

Conditions for Running the DTC

The HSM must be powered.

Conditions for Setting the DTC

B2508 02

Before the heated seats are activated, the HSM detects a short to ground on the seat heating element supply voltage circuit or control circuit.

B2508 01

Before the heated seats are activated, the HSM detects a short to battery voltage on the seat heating element supply voltage circuit or control circuit.

Action Taken When the DTC Sets

The heated seat function for both seats will be disabled.

Conditions for Clearing the DTC

* The current DTC clears when the malfunction is no longer present and the power mode changes to OFF then back to ACC or RUN.

* The history DTC will clear after 50 consecutive fault-free ignition cycles have occurred.

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 604

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 604

1. Install a 20A fused jumper wire between the control terminal 1 and 12 volts. Momentarily install a jumper wire between the control terminal

3 and ground. The liftgate latch assembly should perform the CINCH or RELEASE function.

瀚慖f the function does not perform as specified, replace the liftgate latch assembly.

2. Reverse the jumper wires; the liftgate latch assembly should perform the RELEASE or CINCH function.

瀚慖f the function does not perform as specified, replace the liftgate latch assembly.

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 LGM replacement, setup and programming

HP2 W/O Memory

DTC B2508 or B2509 (HP2 w/o Memory)

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 B2508 01

- Seat Heater Relay Circuit Short to Battery

DTC B2508 02

- Seat Heater Relay Circuit Short to Ground

Diagnostic Fault Information

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 603

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 603

Important: Before testing can be performed the liftgate must be opened. Refer to Opening the Liftgate Without Electrical Power (See:

Body and Frame/Doors, Hood and Trunk/Trunk / Liftgate/Service and Repair/Procedures) for the appropriate procedure.

Whenever the LGM loses power or is disconnected, the ignition must be cycled OFF then ON in order to reactivate the LGM.

Reference Information

Schematic Reference

Liftgate Schematics (See: Body and Frame/Doors, Hood and Trunk/Trunk / Liftgate/Diagrams/Electrical Diagrams)

Connector End View Reference

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

Description and Operation

Liftgate Description and Operation (See: Body and Frame/Doors, Hood and Trunk/Trunk / Liftgate/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

Ignition ON, command the liftgate to OPEN and CLOSE with the scan tool. The liftgate latch assembly should release the liftgate allowing the

liftgate to open.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the liftgate latch assembly.

2. Test for less than 5 ohms between the control circuit terminal 1 and ground.

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

the LGM.

3. Test for less than 5 ohms between the control circuit terminal 3 and ground.

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

the LGM.

4. Connect a test lamp between control circuit terminal 1 and ground.

5. Ignition ON, command the liftgate to OPEN by pressing and releasing the liftgate interior switch. The test lamp should illuminate while

commanding the OPEN state.

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 LGM.

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 LGM.

6. Ignition OFF, connect a test lamp between the control circuit terminal 3 and ground.

7. Connect a 3A fused jumper wire between the signal circuit terminal 6 and ground.

8. Ignition ON, command the liftgate to CLOSE by pressing and releasing the liftgate interior switch. The test lamp should illuminate while

commanding the CLOSE state.

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 LGM.

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 LGM.

9. If all circuits test normal, test or replace the liftgate latch assembly.

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1495

(DTC) Type Definitions)

Scan Tool Reference

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

Circuit/System Verification

1. Ignition ON, review the Failure Records when the DTC set. Verify the scan tool ECT Sensor parameter is less than 125掳C (257掳F).

瀚慖f greater than the specified range, refer to Engine Overheating (See: Engine, Cooling and Exhaust/Cooling System/Testing and

Inspection/Symptom Related Diagnostic Procedures/Engine Overheating).

2. Engine running, accessories OFF, measure and record the battery voltage at the battery terminals with a DMM. The voltage should be

between 12.6-15.0 volts.

瀚慖f not within the specified range, or the charge indicator light is ON, refer to Charging System Test (See: Starting and Charging/Testing

and Inspection/Component Tests and General Diagnostics/Charging System Test).

3. Perform the Transmission Fluid Level and Condition Check (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing

and Inspection/Component Tests and General Diagnostics/6T70/6T75 - Automatic Transmission/Transmission Fluid Level and Condition

Check) to verify correct fluid level and condition.

4. Perform the Transmission Fluid Cooler Flushing and Flow Test (See: Transmission and Drivetrain/Automatic

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

Transmission/Transmission Fluid Cooler Flushing and Flow Test) to verify proper transmission oil cooler flow.

5. Operate the vehicle within the conditions for running and setting the DTC until normal engine temperature is reached. Verify the scan tool

TCM Temperature parameter is less than 146掳C (295掳F).

瀚慖f greater than the specified range, inspect the transmission cooling system for obstructions to the airflow of the radiator or transmission

due to debris, kinked, or damaged transmission fluid lines, or damage to the transmission cooler. If all the items test normal, replace the

control solenoid valve assembly.

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.

Repair Instructions

Important:

* 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

P0638

DTC P0638, P2100-P2103, or P2119 (Without 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 P0638

- Throttle Actuator Control (TAC) Command Performance

DTC P2100

- Throttle Actuator Control (TAC) Motor Control Circuit

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 602

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 602

Circuit/System Description

The latch motor is a bi-directional motor and cinch or unlatch operation is the result of the direction of the motor rotation. The liftgate module

(LGM) controls the latch motor through the control circuits by supplying power and ground in the appropriate polarity. The motor control circuits

are monitored by the LGM prior to activation for a high or low condition and during motor operation for an insufficient current flow condition.

Conditions for Running the DTC

The system voltage is 9-16 volts.

Conditions for Setting the DTC

B2495 01

The LGM detects a short to voltage in the liftgate latch motor open control circuit or the liftgate latch motor close control circuit.

B2495 02

The LGM detects a short to ground in the liftgate latch motor open control circuit or the liftgate latch motor close control circuit.

B2495 04

The LGM detects an open/high resistance in the liftgate latch motor open control circuit or the liftgate latch motor close control circuit.

Action Taken When the DTC Sets

The liftgate will be inoperative in the power and manual modes

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.

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2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 601

1. Ignition OFF, disconnect the harness connector at the liftgate handle switch.

2. Test for infinite resistance between the signal terminal A and the ground terminal B with the switch in the open position.

瀚慖f not the specified value, replace the liftgate handle switch.

3. Test for less than 2 ohms between the signal terminal A and the ground terminal B with the switch in the closed position.

瀚慖f greater than the specified range, replace the liftgate handle switch.

Repair Instructions

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

* Liftgate Release Switch Replacement (Except Avalanche and Escalade EXT) (See: Body and Frame/Doors, Hood and Trunk/Trunk /

Liftgate/Trunk / Liftgate Switch/Service and Repair/Liftgate Release Switch Replacement (Except Avalanche and Escalade EXT))

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

B2495

DTC B2495

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 B2495 01

- Endgate/Liftgate Latch Control Circuit Short to Battery

DTC B2495 02

- Endgate/Liftgate Latch Control Circuit Short to Ground

DTC B2495 04

- Endgate/Liftgate Latch Control Circuit Open Circuit

Diagnostic Fault Information

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2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 600

Conditions for Setting the DTC

The liftgate release switch signal circuit is active for longer than 10 minutes.

Action Taken When the DTC Sets

The liftgate latch will be inoperative from the liftgate handle switch.

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 become a history DTC.

* A history DTC will clear after 50 ignition cycles

Diagnostic Aids

Before testing can be performed the liftgate must be opened. Refer to Opening the Liftgate Without Electrical Power (See: Body and

Frame/Doors, Hood and Trunk/Trunk / Liftgate/Service and Repair/Procedures) for the appropriate procedure.

Reference Information

Schematic Reference

Release Systems Schematics (See: Body and Frame/Locks/Diagrams/Electrical Diagrams/Release Systems Schematics)

Connector End View Reference

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

Description and Operation

Liftgate Description and Operation (See: Body and Frame/Doors, Hood and Trunk/Trunk / Liftgate/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

Ignition ON, observe the scan tool Liftgate Handle Sw. parameter while pressing the liftgate handle switch. The reading should change between

Active and Inactive.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the liftgate handle switch.

2. Test for less than 1.0 ohm between the ground circuit terminal B and ground.

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

3. Ignition ON, verify the scan tool Liftgate Handle Sw. parameter is Inactive.

瀚慖f not the specified value, test the signal circuit terminal A for a short to ground. If the circuit tests normal, replace the BCM.

4. Install a 3A fused jumper wire between the signal circuit terminal A and the ground circuit terminal B. Verify the scan tool Liftgate Handle

Sw. parameter is Active.

瀚慖f not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the

BCM.

5. If all circuits test normal, test or replace the liftgate handle switch.

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2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 60

P0C14 - P1101

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1473

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

瀚慖f the circuit tests normal and the B+ circuit fuse is open, test the control circuit terminal 87 for a short to ground.

4. Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal 87 and ground.

瀚慖f the test lamp illuminates, test the control circuit for a short to voltage.

5. Parking brake applied and the transmission is in NEUTRAL or PARK. Momentarily install a 30 A fused jumper wire between the B+ circuit

terminal 30 and the control circuit terminal 87. Verify the starter is activated.

瀚慖f the starter does not activate, test the control circuit for an open/high resistance. If the circuit tests normal, test or replace the starter.

6. Ignition OFF, connect a test lamp between the control circuit terminal 86 and the ground circuit terminal 85.

7. Transmission in park or neutral, cycle the ignition between the OFF and CRANK position. 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 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.

8. If all circuits tests normal, replace the KR27 starter relay.

Component Testing

Relay Test

1. Ignition OFF, disconnect the starter relay.

2. Test for 60-180 Ohms between terminals 85 and 86.

瀚慖f not within the specified range, replace the relay.

3. Test for infinite resistance between the following terminals:

* 30 and 86

* 30 and 87

* 30 and 85

* 85 and 87

瀚慖f not the specified value, replace the relay.

4. Install a 20 A fused jumper wire between relay terminal 85 and 12 V. Install a jumper wire between relay terminal 86 and ground. Test for

less than 2 Ohms between terminals 30 and 87.

瀚慖f greater than specified range, replace the relay.

Repair Instructions

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

* Relay Replacement (Attached to Wire Harness) (See: Power and Ground Distribution/Power Distribution Relay/Service and Repair/Relay

Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (See: Power and Ground Distribution/Power

Distribution Relay/Service and Repair/Relay Replacement (Within an Electrical Center))

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

P0616

DTC P0615, P0616, or P0617