2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 927
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 probes 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
low reference circuit, TCEM X1 pin H.
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.
瀚慖f the voltage is less than the specified range, test the low reference circuit for a short to ground, an open/high resistance or short to
voltage. If all circuits and connections test normal, test the TCCM for proper operation.
5. Using the PU probe J 35616-4A, test for 6.0-7.0 V between the incremental encoder impulse signal circuit, TCEM X1 pin E 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, test the TCCM for proper operation.
6. Using the PU probe J 35616-4A, test for 6.0-7.0 V between the incremental encoder direction signal circuit, TCEM X1 pin F 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, test the TCCM for proper operation.
7. Using the PU probe J 35616-4A, test for greater than 500 ohm between the incremental encoder sensor (8 V) supply circuit, TCEM X1 pin G
and all other pins of the TCEM 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. Using the PU probe J 35616-4A, test for greater than 500 ohm between the incremental encoder impulse signal circuit, TCEM X1 pin E and
all other pins of the TCEM 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.
9. Using the PU probe J 35616-4A, test for greater than 10 ohm between the incremental encoder direction signal circuit, TCEM X1 pin F and
all other pins of the TCEM 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.
10. Using the PU probe J 35616-4A, test for greater than 10 ohm between the low reference circuit, TCEM X1 pin H and all other pins of the
TCEM 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.
11. Test the TCEM for proper operation.
Component Testing
Incremental Position Sensor
1. Set parking brake.
2. Block wheels.
3. Remove the encoder motor from transfer case. Using a paint pen or marker, place indexing marks on the shift detent lever receiver and the
mounting surface of the encoder motor.
4. Connect encoder motor to engine harness.
5. Key ON, engine OFF.
6. Transmission in Neutral.
7. Attach scan tool. Clear codes. DTC C0569-4B may remain in memory.
Note: You must perform the Transfer Case High/Low Clutch Reset (See: Transmission and Drivetrain/Transfer Case/Testing and
Inspection/Symptom Related Diagnostic Procedures/MP 3010-NP0/Transfer Case High/Low Clutch Reset) procedure after performing the
next step.
8. Monitor the following parameters while using the Transfer Case Motor Control function of the Special Function feature of the scan tool to
Showing posts with label 瀚慖f the voltage is less than the specified range. Show all posts
Showing posts with label 瀚慖f the voltage is less than the specified range. Show all posts
Monday, November 18, 2019
Monday, November 11, 2019
2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 328
2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 328
瀚慖f the voltage is less than the specified range, test the AWD indicator control circuit for an open/high resistance or short to power. If all
circuits and connections test normal, test the TCCM for proper operation.
5. Key OFF. Using the L-BU probe J 35616-64B, test for greater than 10 ohm between the indicator dimming control circuit, TCSCS X1 pin 4
and all other pins of the TCSCS 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.
6. Disconnect TCCM connector X1.
7. Using the L-BU probe J 35616-64B, test for greater than 10 ohm between the 4 High indicator control circuit, TCSCS X1 pin 7 and all other
pins of the TCSCS 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. Test the TCSCS for proper operation.
Component Testing
BCM
1. Key OFF. Disconnect the X1 connector at the TCSCS.
2. Using the L-BU probe J 35616-64B, connect a test light between the indicator dimming control circuit, TCSCS harness X1 pin 4 and a good
ground.
3. Key ON, engine OFF. When the daylight running lights (DRL) sensor commands the headlights ON, the test light should be dull or OFF.
瀚慖f the test light is bright, test the indicator dimming control circuit for a short to voltage condition. If all circuits and connections test
normal, replace the BCM.
Note: When the DRL sensor turns the headlights OFF, the indicator dimming control circuit voltage, TCSCS X1 pin 4, will go from a
diagnostic B+ to a true B+.
4. Place a shop light on the DRL sensor. When the headlights go out the test light should illuminate brightly.
瀚慖f the test light is dull or OFF, test the indicator dimming control circuit for an open/high resistance or short to ground condition. If all
circuits and connections test normal, replace the BCM.
TCCM
1. Key OFF. Disconnect the X1 connector at the TCSCS.
2. Key ON, engine OFF.
3. Using the L-BU probe J 35616-64B, test for 4.5-5.5 V between the 5-volt reference circuit, TCSCS harness X1 pin 11 and a good ground.
瀚慖f the voltage is greater than the specified range, test the 5-volt reference circuit for a short to voltage. If all circuits and connections test
normal, replace the TCCM.
瀚慖f the voltage is less than the specified range, test the 5-volt reference circuit for an open/high resistance or short to ground. If all circuits
and connections test normal, replace the TCCM.
4. Using the L-BU probe J 35616-64B, connect a test light between the 5-volt reference circuit, TCSCS harness X1 pin 11 and a good ground.
The test light should illuminate dimly.
瀚慖f the test light does not illuminate, obtain a different test light and repeat step 4.
5. Key OFF. Wait 30 seconds for the TCCM to shut down.
Note: The TCCM must see the added resistance of the test light on the control circuit at key ON or the TCCM will shut the control circuit
drivers OFF. Volt meters will not work for this test.
6. Using the L-BU probe J 35616-64B, connect a test light between the TCSCS harness as specified below for the LED control circuit being
tested.
7. Key ON, engine OFF.
8. Using the Special Function ability of the scan tool, command the affected LED ON and OFF. The test light should turn ON (dimly) and OFF
as commanded.
瀚慖f the test light remains illuminated when commanded OFF, test the affected control circuit for a short to ground. If all circuits and
connections test normal, replace the TCCM.
瀚慖f the test light remains OFF when commanded ON, test the affected control circuit for an open/high resistance or short to voltage. If all
circuits and connections test normal, replace the TCCM.
瀚慖f the voltage is less than the specified range, test the AWD indicator control circuit for an open/high resistance or short to power. If all
circuits and connections test normal, test the TCCM for proper operation.
5. Key OFF. Using the L-BU probe J 35616-64B, test for greater than 10 ohm between the indicator dimming control circuit, TCSCS X1 pin 4
and all other pins of the TCSCS 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.
6. Disconnect TCCM connector X1.
7. Using the L-BU probe J 35616-64B, test for greater than 10 ohm between the 4 High indicator control circuit, TCSCS X1 pin 7 and all other
pins of the TCSCS 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. Test the TCSCS for proper operation.
Component Testing
BCM
1. Key OFF. Disconnect the X1 connector at the TCSCS.
2. Using the L-BU probe J 35616-64B, connect a test light between the indicator dimming control circuit, TCSCS harness X1 pin 4 and a good
ground.
3. Key ON, engine OFF. When the daylight running lights (DRL) sensor commands the headlights ON, the test light should be dull or OFF.
瀚慖f the test light is bright, test the indicator dimming control circuit for a short to voltage condition. If all circuits and connections test
normal, replace the BCM.
Note: When the DRL sensor turns the headlights OFF, the indicator dimming control circuit voltage, TCSCS X1 pin 4, will go from a
diagnostic B+ to a true B+.
4. Place a shop light on the DRL sensor. When the headlights go out the test light should illuminate brightly.
瀚慖f the test light is dull or OFF, test the indicator dimming control circuit for an open/high resistance or short to ground condition. If all
circuits and connections test normal, replace the BCM.
TCCM
1. Key OFF. Disconnect the X1 connector at the TCSCS.
2. Key ON, engine OFF.
3. Using the L-BU probe J 35616-64B, test for 4.5-5.5 V between the 5-volt reference circuit, TCSCS harness X1 pin 11 and a good ground.
瀚慖f the voltage is greater than the specified range, test the 5-volt reference circuit for a short to voltage. If all circuits and connections test
normal, replace the TCCM.
瀚慖f the voltage is less than the specified range, test the 5-volt reference circuit for an open/high resistance or short to ground. If all circuits
and connections test normal, replace the TCCM.
4. Using the L-BU probe J 35616-64B, connect a test light between the 5-volt reference circuit, TCSCS harness X1 pin 11 and a good ground.
The test light should illuminate dimly.
瀚慖f the test light does not illuminate, obtain a different test light and repeat step 4.
5. Key OFF. Wait 30 seconds for the TCCM to shut down.
Note: The TCCM must see the added resistance of the test light on the control circuit at key ON or the TCCM will shut the control circuit
drivers OFF. Volt meters will not work for this test.
6. Using the L-BU probe J 35616-64B, connect a test light between the TCSCS harness as specified below for the LED control circuit being
tested.
7. Key ON, engine OFF.
8. Using the Special Function ability of the scan tool, command the affected LED ON and OFF. The test light should turn ON (dimly) and OFF
as commanded.
瀚慖f the test light remains illuminated when commanded OFF, test the affected control circuit for a short to ground. If all circuits and
connections test normal, replace the TCCM.
瀚慖f the test light remains OFF when commanded ON, test the affected control circuit for an open/high resistance or short to voltage. If all
circuits and connections test normal, replace the TCCM.
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