Diagnostic Test

DTC IS ACTIVE
NOTE: Diagnose and repair any system voltage or Transfer Case related DTCs in the Final Drive Control Module before continuing with this test.
1. Ignition on, engine not running.
2. With the scan tool, erase DTCs.
3. Test drive the vehicle.
4. During the test drive, move the Transfer Case Selector Switch to each position several times in accordance with the Service Information.
5. With the scan tool, read DTCs.
  Does this DTC reset?
  
  Yes
  - Go to step 2
  No
  - Go to step 4
TRANSFER CASE SELECTOR SWITCH
1. Using the SYSTEM WIRING DIAGRAMS as a guide, inspect the wiring and connectors relative to this circuit.
2. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Final Drive Control (FDCM) - Standard Procedure .
  No
  - Go to step 3
FINAL DRIVE CONTROL MODULE (FDCM)
1. Turn the ignition off to the lock position
2. Replace the Transfer Case Selector Switch in accordance with the Service Information.
3. Ignition on, engine not running.
4. With the scan tool, erase DTCs.
5. Test drive the vehicle.
6. During the test drive, move the Transfer Case Selector Switch to each position several times in accordance with the Service Information.
7. With the scan tool, read DTCs.
  Does this DTC reset?
  
  Yes
  - 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 .
  No
  - Test Complete.
  - Perform TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Final Drive Control (FDCM) - Standard Procedure .
INTERMITTENT WIRING AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. Using the SYSTEM WIRING DIAGRAMS as a guide, inspect the wiring and connectors.
3. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors.
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 TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Final Drive Control (FDCM) - Standard Procedure .
  No
  - Test complete.