2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 923

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 923

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. Using the TCSCS, select each transfer case mode/range while monitoring the Rotational Position Sensor parameter and the Incremental

Position Sensor parameter on the scan tool, The Rotational Position Sensor parameter and the Incremental Position Sensor parameter should

track within 5 degrees of 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 from the transfer case two/four wheel drive actuator position sensor also known as the rotational

position sensor (RPS).

2. Key ON, engine OFF.

3. Using the GY probe J 35616-2A, test for 4.8-5.2 V between the 5-volt reference circuit, RPS X1 pin B and a good ground (the ground

terminal of the EL-49742 - harness, black terminal).

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

connections test normal, test the TCCM for proper operation.

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.

4. Using the GY probes J 35616-2A, test for 4.8-5.2 V between the 5-volt reference circuit, RPS X1 pin B and the low reference circuit, RPS

X1 pin A.

瀚慖f the voltage is less than the specified range, test the low reference circuit for an open/high resistance. If all circuits and connections test

normal, test the TCCM for proper operation.

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

normal, test the TCCM for proper operation.

5. Using the GY probes J 35616-2A, test for 4.5-5.0 V between the rotary position sensor signal circuit, RPS X1 pin C and a good ground.

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

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

瀚慖f the voltage is greater than the specified range, test the rotary position sensor signal circuit for a short to voltage. If all circuits and

connections test normal, test the TCCM for proper operation.

6. Using the GY probe J 35616-2A, test for greater than 500 ohm between the low reference circuit, RPS X1 pin A and all other pins of the RPS

X1.

瀚慖f the resistance is less than the specified range, test the affected circuits for a shorted together condition. If all circuits and connections

test normal, test the TCCM for proper operation.

7. Using the GY probe J 35616-2A, test for greater than 500 ohm between the 5-volt reference circuit, RPS X1 pin B and all other pins of the

RPS X1.

瀚慖f the resistance is less than the specified range, test the affected circuits for a shorted together condition. If all circuits and connections

test normal, test the TCCM for proper operation.

8. Key OFF. Disconnect TCCM connector X2.

9. Using the GY probe J 35616-2A, test for greater than 10 ohm between the low reference circuit, TCSCS X2 pin 9 and all other pins of the