2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 912
connections test normal, test the TCCM.
6. Using the purple probes J 35616-4A, test for a diagnostic B+ (+0.0/-1.0 V) between the motor A circuit, TCEM harness X1 pin A, and a
good ground.
瀚慖f the voltage is less than the specified range, test the motor A circuit for an open/high resistance, short to ground or short together
condition. If all circuits and connections test normal, test the TCCM.
7. Remove the encoder motor from transfer case. Using a paint pen or marker, place indexing marks on the encoder motor output gear and the
mounting surface of the encoder motor.
8. Connect the X1 connector at the transfer case encoder motor (TCEM). Position the TCEM so that the indexing marks are visible from the
side of the vehicle.
9. Remove key. Wait 30 seconds. Key ON, engine OFF. Clear codes.
10. Block wheels. Parking brake engaged. Transmission in Neutral. Using the Transfer Case Motor Control function of the Special Function
feature of the scan tool, command the encoder motor forward and reverse. When commanded forward, the encoder motor drive gear should
rotate in one direction. When commanded reverse, the encoder motor drive gear should rotate in the opposite direction.
瀚慖f the encoder motor drive gear is unable to rotate, test the TCEM.
11. Inspect the transfer case actuator shaft gear for a binding condition. If binding, remove the transfer case and repair the binding condition.
12. Test the TCEM.
Component Testing
Transfer Case Encoder Motor (TCEM) - Actuator Lock, Motor A and Motor B
1. Remove the encoder motor from transfer case. Using a paint pen or marker, place indexing marks on the encoder motor drive gear and the
mounting surface of the encoder motor.
2. Using a purple probe J-35616-5, attach the red lead from one of the EL-49741 - harnesses to the battery positive voltage terminal of the
TCEM, pin B.
3. Using a purple probe J-35616-5, attach the black lead from this same jumper harness to the lock solenoid control terminal of the TCEM, pin
C.
4. Attach a 9 volt battery to this harness (not included). You will hear the encoder motor unlock.
5. Using a purple probe J-35616-5, attach the red lead from the other EL-49741 - jumper harness to the motor control A terminal of the TCEM,
pin A.
6. Using a purple probe J-35616-5, attach the black lead from this same jumper harness to the motor control B terminal of the TCEM, pin D.
7. Touch the battery terminals of the 9 volt battery to the battery terminals of the jumper harness. This should rotate the encoder motor drive
gear in either a clockwise or counterclockwise rotation depending on battery orientation.
瀚慖f the encoder motor drive gear does not rotate, replace the encoder motor.
8. Using the purple probes J 35616-5, test for between 0.3-40 ohm between the motor control A circuit TCEM X1 pin A and the motor control
B circuit TCEM X1 pin D.
瀚慖f greater than the specified range, replace the encoder motor.
瀚慖f less than the specified range, replace the encoder motor.
9. Using the purple probes J 35616-5, test for greater than 10 ohm between the following circuits and the encoder motor case:
* Motor control A, TCEM harness X1 pin A.
* Motor control B, TCEM harness X1 pin D.
瀚慖f outside the specified range, replace the encoder motor.
10. Using the purple probes J 35616-5, test for greater than 1 M ohm between the motor control A circuit, TCEM X1 pin A and all other pins on
the TCEM harness X1 except the motor control B, TCEM X1 pin D.
瀚慖f outside the specified range, replace the encoder motor.
11. Using the purple probes J 35616-5, test for greater than 1 M ohm between the motor control B circuit, TCEM X1 pin D. and all other pins on
the TCEM harness X1 except the motor control A circuit, TCEM X1 pin A.
瀚慖f outside the specified range, replace the encoder motor.
12. Test the TCCM.
TCCM
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.
Showing posts with label test the TCCM.. Show all posts
Showing posts with label test the TCCM.. Show all posts
Monday, November 18, 2019
2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 894
2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 894
test the TCCM.
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.
6. Test the TCEM.
Component Testing
Transfer Case Encoder Motor (TCEM) - Actuator Lock, Motor A and Motor B
1. Remove the encoder motor from transfer case. Using a paint pen or marker, place indexing marks on the encoder motor drive gear and the
mounting surface of the encoder motor.
2. Install EL-49742 - harness.
3. Using a purple probe J-35616-5, attach the red lead from the EL-49742 - jumper harness to the motor control A terminal of the TCEM, pin A.
4. Using a purple probe J-35616-5, touch the black lead from this same jumper harness to the motor control B terminal of the TCEM, pin D.
The encoder motor drive gear should not rotate.
瀚慖f the encoder motor rotates, replace the encoder motor.
5. Disconnect the black lead of theEL-49742 - jumper harness from the motor control B terminal of the TCEM, pin D.
6. Using a purple probe J-35616-5, attach the red lead from the EL-49741 - harness to the battery positive voltage terminal of the TCEM, pin B.
7. Using a purple probe J-35616-5, attach the black lead from this same jumper harness to the lock solenoid control terminal of the TCEM, pin
C.
8. Attach a 9 volt battery to this harness (not included). You should hear the encoder motor unlock.
9. Touch the black lead fromEL-49742 - jumper harness to the motor control B terminal of the transfer case encoder motor, pin D. The encoder
motor drive gear should rotate.
瀚慖f the encoder motor drive gear does not rotate, replace the encoder motor.
10. Using the purple probe J 35616-5, test for between 10-30 ohm between the battery positive voltage circuit TCEM, pin B and the lock
solenoid control circuit TCEM pin C.
瀚慖f outside the specified range, replace the encoder motor.
11. Using the purple probe J 35616-5, test for greater than 1 M ohm between the following circuits and the encoder motor case:
* Battery positive voltage circuit TCEM, pin B.
* Lock solenoid control circuit TCEM pin C.
瀚慖f less than the specified value, replace the encoder motor.
12. Using the purple probe J 35616-5, test for greater than 1 M ohm between the battery positive voltage circuit TCEM, pin B and all other pins
on the TCEM X1 except the lock solenoid control circuit TCEM, pin C.
瀚慖f less than the specified value, replace the encoder motor.
13. Using the purple probe J 35616-5, test for greater than 1 M ohm between the lock solenoid control circuit TCEM, pin C and all other pins on
the TCEM X1 except the battery positive voltage circuit TCEM, pin B.
瀚慖f less than the specified value, replace the encoder motor.
14. Test the TCCM.
Transfer Case Shift Control Module (TCCM)
1. Ignition OFF. Disconnect the X1 harness connector at the TCEM.
2. Ignition ON, engine OFF. Install EL-49742 - harness.
3. Block wheels. Parking brake engaged. Transmission in Neutral.
4. Using the purple probe J 35616-4A, connect a test lamp between the battery positive voltage circuit, TCEM X1 pin B and the ground
terminal of EL-49742 - harness, black terminal. The test light should illuminate.
瀚慖f the test light does not illuminate, test the battery positive voltage 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 probe J 35616-4A, connect a test lamp between the battery positive voltage circuit, TCEM X1 pin B and the lock solenoid
control circuit, TCEM X1 pin C. The test light should not illuminate.
瀚慖f the test light illuminates, test the lock solenoid control circuit for a short to ground. If all circuits and connections test normal,
reprogram the TCCM. If the DTC continues to set replace the TCCM.
6. Using the Transfer Case Lock function of the Special Function feature of the scan tool, command the transfer case lock ON and OFF. When
the lock is commanded ON, release solenoid de-energized, the test light should not illuminate. When the lock is commanded OFF, release
test the TCCM.
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.
6. Test the TCEM.
Component Testing
Transfer Case Encoder Motor (TCEM) - Actuator Lock, Motor A and Motor B
1. Remove the encoder motor from transfer case. Using a paint pen or marker, place indexing marks on the encoder motor drive gear and the
mounting surface of the encoder motor.
2. Install EL-49742 - harness.
3. Using a purple probe J-35616-5, attach the red lead from the EL-49742 - jumper harness to the motor control A terminal of the TCEM, pin A.
4. Using a purple probe J-35616-5, touch the black lead from this same jumper harness to the motor control B terminal of the TCEM, pin D.
The encoder motor drive gear should not rotate.
瀚慖f the encoder motor rotates, replace the encoder motor.
5. Disconnect the black lead of theEL-49742 - jumper harness from the motor control B terminal of the TCEM, pin D.
6. Using a purple probe J-35616-5, attach the red lead from the EL-49741 - harness to the battery positive voltage terminal of the TCEM, pin B.
7. Using a purple probe J-35616-5, attach the black lead from this same jumper harness to the lock solenoid control terminal of the TCEM, pin
C.
8. Attach a 9 volt battery to this harness (not included). You should hear the encoder motor unlock.
9. Touch the black lead fromEL-49742 - jumper harness to the motor control B terminal of the transfer case encoder motor, pin D. The encoder
motor drive gear should rotate.
瀚慖f the encoder motor drive gear does not rotate, replace the encoder motor.
10. Using the purple probe J 35616-5, test for between 10-30 ohm between the battery positive voltage circuit TCEM, pin B and the lock
solenoid control circuit TCEM pin C.
瀚慖f outside the specified range, replace the encoder motor.
11. Using the purple probe J 35616-5, test for greater than 1 M ohm between the following circuits and the encoder motor case:
* Battery positive voltage circuit TCEM, pin B.
* Lock solenoid control circuit TCEM pin C.
瀚慖f less than the specified value, replace the encoder motor.
12. Using the purple probe J 35616-5, test for greater than 1 M ohm between the battery positive voltage circuit TCEM, pin B and all other pins
on the TCEM X1 except the lock solenoid control circuit TCEM, pin C.
瀚慖f less than the specified value, replace the encoder motor.
13. Using the purple probe J 35616-5, test for greater than 1 M ohm between the lock solenoid control circuit TCEM, pin C and all other pins on
the TCEM X1 except the battery positive voltage circuit TCEM, pin B.
瀚慖f less than the specified value, replace the encoder motor.
14. Test the TCCM.
Transfer Case Shift Control Module (TCCM)
1. Ignition OFF. Disconnect the X1 harness connector at the TCEM.
2. Ignition ON, engine OFF. Install EL-49742 - harness.
3. Block wheels. Parking brake engaged. Transmission in Neutral.
4. Using the purple probe J 35616-4A, connect a test lamp between the battery positive voltage circuit, TCEM X1 pin B and the ground
terminal of EL-49742 - harness, black terminal. The test light should illuminate.
瀚慖f the test light does not illuminate, test the battery positive voltage 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 probe J 35616-4A, connect a test lamp between the battery positive voltage circuit, TCEM X1 pin B and the lock solenoid
control circuit, TCEM X1 pin C. The test light should not illuminate.
瀚慖f the test light illuminates, test the lock solenoid control circuit for a short to ground. If all circuits and connections test normal,
reprogram the TCCM. If the DTC continues to set replace the TCCM.
6. Using the Transfer Case Lock function of the Special Function feature of the scan tool, command the transfer case lock ON and OFF. When
the lock is commanded ON, release solenoid de-energized, the test light should not illuminate. When the lock is commanded OFF, release
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