Diagnostic Test
WARNING: This page is about a different variant/trim than selected.
- CHECK THE FCM FOR DTCS
- With the scan tool, check for FCM DTCs.
Does the FCM report the DTC U0001-CAN C BUS DTC or U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE MODULE?
Yes
- Refer to DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure and Non DTC Based Diagnostics for diagnostic procedures and other possible causes.
- 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 FCM DTCs.
- CHECK FOR ABS DTCS
- With the scan tool, read ABS DTCs.
Are there any ABS DTCs present?
Yes
- Refer to ABS - ELECTRICAL DIAGNOSTICS 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 with the Service Information.
- Perform NAG1 TRANSMISSION VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure
- With the scan tool, read ABS DTCs.