Diagnostic Test

WARNING: This page is about a different variant/trim than selected.

CHECK IF DTC IS CURRENT
1. Using the scan tool, read TCM DTCs.
2. Record the Environmental Data and any DTCs.
3. Clear DTCs.
4. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
5. Read TCM DTCs.
  Did the DTC reset?
  
  Yes
  - Go To 2
  No
  - Go To 4
CHECK THE COMMON SENSOR GROUND CIRCUITS FOR AN OPEN
1. Disconnect the TCM C2 harness connector.
2. Disconnect the Transmission Oil Temperature sensor.
3. Measure the resistance of the Common Sensor ground circuits between the Common Sensor Ground circuits in the appropriate terminal of the TCM C2 harness connector.
  Is the resistance less that 5.0 Ohms?
  
  Yes
  - Go To 3
  No
  - Inspect the harness for an open in the Transmission Temperature Sensor ground circuit. If no open is found, replace the Transmission Temperature sensor.
  - Perform the C635 DDCT VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (T54) TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT FOR AN OPEN
1. Measure the resistance of the (T54) Transmission Temperature Sensor signal circuit between the Electrohydraulic C1 harness connector and the appropriate terminal of the TCM 2 harness connector.
  Is the resistance less that 5.0 Ohms?
  
  Yes
  - Using the schematics as a guide, check the Transmission Control Module (TCM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the TCM in accordance with the Service Information.
  - Perform the C635 DDCT VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Inspect the harness for an open in the (T54) Transmission Temperature Sensor circuit. If no open is found, replace the Transmission Temperature sensor.
  - Perform the C635 DDCT VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK WIRING AND CONNECTORS
1. The conditions necessary to set the DTC are not present at this time.
2. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
3. Wiggle the wires while checking for shorted and open circuits.
4. Check for any Service Bulletins that may apply.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the C635 DDCT VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Test Complete.