2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 917
1. Ignition OFF. Disconnect the X1 harness connector at the TCEM.
2. Ignition ON, engine OFF. Install EL-49742 - harness.
3. Using the purple probes J 35616-4A, connect a test lamp between the motor control A circuit, TCEM X1 pin A and the ground terminal of
EL-49742 - harness, black terminal.
4. Using the Transfer Case Motor Control function of the Special Function feature of the scan tool, command the motor forward and reverse.
When commanded forward, the test light should illuminate for 10 seconds and turn OFF. When commanded reverse, the test light should turn
OFF.
瀚慖f the test light stays ON when commanded OFF, test the motor control A circuit for a short to voltage. If all circuits and connections test
normal, reprogram the TCCM. If the DTC continues to set replace the TCCM.
瀚慖f the test light does not illuminate when commanded ON, test the motor control A circuit for an open or short to ground. If all circuits
and connections test normal, reprogram the TCCM. If the DTC continues to set replace the TCCM.
5. Using the purple probes J 35616-4A, connect a test lamp between the motor control B circuit, TCEM X1 pin D and the ground terminal of
EL-49742 - harness, black terminal.
6. Using the Transfer Case Motor Control function of the Special Function feature of the scan tool, command the motor forward and reverse.
When commanded forward, the test light should turn OFF. When commanded reverse, the test light should illuminate for 10 seconds and turn
OFF.
瀚慖f the test light stays ON when commanded OFF, test the motor control B circuit for a short to voltage. If all circuits and connections test
normal, reprogram the TCCM. If the DTC continues to set replace the TCCM.
瀚慖f the test light does not illuminate when commanded ON, test the motor control B circuit for an open or short to ground. If all circuits
and connections test normal, reprogram the TCCM. If the DTC continues to set replace the TCCM.
7. Using the purple probes J 35616-4A, connect a test lamp between the motor control A circuit, TCEM X1 pin A and a good ground.
8. Using the Transfer Case Motor Control function of the Special Function feature of the scan tool, command the motor forward and reverse.
When commanded Forward/Counter CW, the test light should illuminate dimly for 10 seconds and turn OFF. When commanded
Reverse/Clockwise, the test light should turn OFF.
瀚慖f the test light stays ON after the 10 seconds, test the motor control A circuit for a short to voltage. If all circuits and connections test
normal, reprogram the TCCM. If the DTC continues to set replace the TCCM.
瀚慖f the test light does not illuminate at all, test the motor control A circuit for an open or short to ground. If all circuits and connections test
normal, reprogram the TCCM. If the DTC continues to set replace the TCCM.
9. Using the purple probes J 35616-4A, connect a test lamp between the motor control B circuit, TCEM X1 pin D and a good ground.
10. Using the Transfer Case Motor Control function of the Special Function feature of the scan tool, command the motor forward and reverse.
When commanded Forward/Counter CW, the test light should turn OFF. When commanded Reverse/Clockwise, the test light should
illuminate dimly for 10 seconds and turn OFF.
瀚慖f the test light stays ON after the 10 seconds, test the motor control B circuit for a short to voltage. If all circuits and connections test
normal, reprogram the TCCM. If the DTC continues to set replace the TCCM.
瀚慖f the test light does not illuminate at all, test the motor control B circuit for an open or short to ground. If all circuits and connections test
normal, reprogram the TCCM. If the DTC continues to set replace the TCCM.
11. Using the purple probes J 35616-4A, connect a test lamp between the motor control A circuit, TCEM X1 pin A and the B+ terminal of
EL-49742 - harness, red terminal.
12. Using the Transfer Case Motor Control function of the Special Function feature of the scan tool, command the motor forward and reverse.
When commanded Forward/Counter CW, the test light should illuminate dimly for 10 seconds and turn OFF. When commanded
Reverse/Clockwise, the test light should illuminate brightly for 10 seconds and turn OFF.
瀚慖f the test light stays ON after the 10 seconds, test the motor control A circuit for a short to voltage. If all circuits and connections test
normal, reprogram the TCCM. If the DTC continues to set replace the TCCM.
瀚慖f the test light does not illuminate at all, test the motor control A circuit for an open or short to ground. If all circuits and connections test
normal, reprogram the TCCM. If the DTC continues to set replace the TCCM.
13. Using the purple probes J 35616-4A, connect a test lamp between the motor control B circuit, TCEM X1 pin D and the B+ terminal of
EL-49742 - harness, red terminal.
14. Using the Transfer Case Motor Control function of the Special Function feature of the scan tool, command the motor forward and reverse.
When commanded Forward/Counter CW, the test light should illuminate brightly for 10 seconds and turn OFF. When commanded
Reverse/Clockwise, the test light should illuminate dimly for 10 seconds and turn OFF.
瀚慖f the test light stays ON after the 10 seconds, test the motor control B circuit for a short to voltage. If all circuits and connections test
normal, reprogram the TCCM. If the DTC continues to set replace the TCCM.
瀚慖f the test light does not illuminate at all, test the motor control B circuit for an open or short to ground. If all circuits and connections test
normal, reprogram the TCCM. If the DTC continues to set replace the TCCM.
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