Diagnostic Test

TRANSMISSION DTCS PRESENT
1. Ignition on, engine not running.
2. With the scan tool, read DTCs in the Transmission Control Module.
  Are there any DTCs present?
  
  Yes
  - Perform the appropriate diagnostic procedure. Refer to DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Diagnosis and Testing .
  No
  - Replace the Final Drive Control Module (FDCM) in accordance with the Service Information.
  - Perform TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Final Drive Control (FDCM) - Standard Procedure .