Diagnostic Test

POWERTRAIN DTCS PRESENT
1. Ignition on.
2. With the scan tool, read DTCs in the Powertrain Control Module.
  Are there any active DTCs present?
  
  Yes
  - Refer to the DIAGNOSTIC CODE INDEX and perform the applicable diagnostic procedure.
  - Perform the TRANSFER CASE VERIFICATION TEST. Refer to TRANSFER CASE VERIFICATION TEST .
  No
  - Replace the Final Drive Control Module (FDCM) in accordance with the Service Information.
  - Perform the TRANSFER CASE VERIFICATION TEST. Refer to TRANSFER CASE VERIFICATION TEST .