2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 932

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 932

TCCM

1. Key OFF. Disconnect the TCCM X1 connector.

2. Key ON, engine OFF. Connect the EL-49742 - harness.

3. Test for 7.5-8.5 V between the incremental encoder sensor (8 V) supply pin, TCCM X1-9, and the ground terminal of the EL-49742 -

harness, black terminal.

瀚慖f the outside the specified range, replace TCCM.

4. Test for 7.5-8.5 V between the incremental encoder sensor (8 V) supply pin, TCCM X1-9, and the low reference pin, TCCM X1-10.

瀚慖f the outside the specified range, replace TCCM.

5. Test for 6.0-7.0 V between the incremental encoder impulse signal pin, TCCM X1-3, and the ground terminal of the EL-49742 - harness,

black terminal.

瀚慖f the outside the specified range, replace TCCM.

6. Key OFF. Connect the TCCM X1 connector. Disconnect the TCCM X2 connector.

7. Key OFF. Test for a diagnostic B+ (+0.0/-1.0 V) between the incremental encoder direction pin, TCCM X2-14, and the B+ terminal of the

EL-49742 - harness, red terminal.

瀚慖f the outside the specified range, replace TCCM.

8. Go to Circuit/System Testing.

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 TCSCM replacement, setup, and programming

* Transfer Case High/Low Clutch Reset (See: Transmission and Drivetrain/Transfer Case/Testing and Inspection/Symptom Related

Diagnostic Procedures/MP 3023/3024-NQH - Transfer Case/Transfer Case High/Low Clutch Reset)

* Transfer Case Two/Four Wheel Drive Actuator Replacement (See: Powertrain Management/Transmission Control Systems/Actuators and

Solenoids - Transmission and Drivetrain/Actuators and Solenoids - Transfer Case/Transfer Case Actuator/Service and Repair/MP 3010-NP0

- Transfer Case/Transfer Case Two/Four Wheel Drive Actuator Replacement)

MP 3010-NP0 - Transfer Case

DTC C0397

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.