Diagnostic Test

DTC IS ACTIVE
NOTE: Check with customer on driving terrain (e.g. mud, sand, snow) for set condition.

NOTE: Diagnose and repair any system voltage or Transfer Case related DTCs in the Final Drive Control Module (FDCM) before continuing with this test.
1. Ignition on, engine not running.
2. With the scan tool, erase DTCs in the FDCM.
3. Test drive the vehicle.
4. With the scan tool, read DTCs in the FDCM.
  Does this DTC reset?
  
  Yes
  - Go to 2
  No
  - Go to 3
AMBIENT TEMPERATURE SENSOR
1. With the scan tool, monitor the ambient temperature in the Front Control Module (FCM).
  Is the ambient temperature at room temperature?
  
  Yes
  - Replace the Final Drive Control Module (FDCM) in accordance with the Service Information.
  - Perform the TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Final Drive Control (FDCM) - Standard Procedure .
  No
  - Replace the Ambient Temperature Sensor in accordance with the Service Information.
  - Perform the TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Final Drive Control (FDCM) - Standard Procedure .
INTERMITTENT WIRING HARNESS AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. Using the wiring diagram/schematic as a guide, inspect the wiring harness and connectors.
3. Wiggle test the wiring harness and connectors while monitoring the scan tool data relative to this circuit.
4. Look for the data to change or for the DTC to reset during the wiggle test.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Final Drive Control (FDCM) - Standard Procedure .
  No
  - Test complete.