2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 920

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 920

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 4.75-5.25 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 probe J 35616-2A, test for 4.75-5.25 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 probe 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

TCCM X2.

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.

10. Using the GY probe J 35616-2A, test for greater than 10 ohm between the rotational position sensor circuit, TCSCS X2 pin 11 and all other

pins of the TCCM X2.

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.

11. Test the RPS for proper operation.

Transfer Case Two/Four Wheel Drive Actuator Position Sensor/Rotational Position Sensor (RPS)

1. Key OFF. Disconnect the X1 connector at the RPS.

2. Remove the RPS from the transfer case.

3. Connect the RPS.

4. While monitoring the Rotational Position Sensor parameter in the Data Display section of the scan tool, rotate the center locating tab of the

RPS. The Rotational Position Sensor parameter reading should sweep between -146 and +204 degrees.

瀚慖f the RPS does not function as explained, replace the RPS.

Transfer Case Shift Control Module (TCCM)

1. Key OFF. Disconnect the X1 connector.