Diagnostic Test
- CHECK THE TIPM FOR DTCS
- With the scan tool, check for TIPM DTCs.
Does the TIPM report the U0002-CAN C BUS OFF PERFORMANCE or U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE MODULE?
Yes
- Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Diagnosis and Testing and U0002-CAN C BUS OFF PERFORMANCE for U0002-CAN C BUS OFF PERFORMANCE first if it is present.
- Perform NAG1 TRANSMISSION VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .
No
- Go to step 2
- With the scan tool, check for TIPM DTCs.
- CHECK FOR ABS DTCS
- With the scan tool, check for ABS DTCs.
Are there any ABS DTCs present?
Yes
- Refer to DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Diagnosis and Testing and perform the appropriate symptom.
- Perform NAG1 TRANSMISSION VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .
No
- 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 to the Service Information.
- Perform NAG1 TRANSMISSION VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .
- With the scan tool, check for ABS DTCs.