2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 930

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 930

C0396 02 and C0396 04

* All shifting disabled.

* The SERVICE 4WD indicator remains illuminated for the remainder of the current ignition cycle.

Conditions for Clearing the DTC

* The transfer case shift control module clears the DTC once the conditions for setting the DTC are no longer present.

* A history DTC clears after 40 consecutive warm up cycles without a fault present.

* History DTCs can be cleared using a scan tool.

Diagnostic Aids

* The incremental position sensor and the rotational position sensor both show position in degrees, and should track each other. Monitor these

sensors for erratic or unreasonable readings.

* If the incremental position sensor is determined to be bad, the entire transfer case actuator will have to be replaced as the incremental sensor

is part of the actuator and cannot be replaced independently.

* The transfer case fill and drain plugs are good sources for ground.

Reference Information

Schematic Reference

Transfer Case Control Schematics (See: Transmission and Drivetrain/Transfer Case/Diagrams/Electrical Diagrams/MP 3023/3024-NQH -

Transfer Case)

Connector End View Reference

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

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.

Special Tools

* EL-49741 - 9 V+ Power Source Harness

* EL-49742 - Battery Voltage B+ and Ground Source Harness

* J 35616 - GM-Approved Terminal Test Kit

Circuit/System Verification

1. Key ON, engine OFF.

2. Connect a scan tool.

3. Monitor the IPS and RPS parameters on the scan tool. Using the transfer case encoder motor, shift the transfer case into all modes. The IPS

and RPS parameters should track each other.

Circuit/System Testing

Note: When test probing harness terminals, it is imperative to use the proper test probe from the most current version of the J 35616 - kit. Use of

an improper test probe may deform the terminal, resulting in intermittent open conditions.

1. Key OFF. Disconnect the X1 connector at the transfer case encoder motor (TCEM).

2. Key ON, engine OFF.

3. Using the PU probe J 35616-4A, test for 7.50-8.50 V between the incremental encoder sensor (8 V) supply circuit, TCEM X1 pin G and a

good ground.

瀚慖f the voltage is greater than the specified range, test the affected circuit for a short to voltage. If all circuits and connections test normal,

test the TCCM for proper operation.

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

all circuits and connections test normal, TCCM for proper operation.

4. Using the PU probe J 35616-4A, test for 7.50-8.50 V between the incremental encoder sensor (8 V) supply circuit, TCEM X1 pin G and the