Diagnostic Test

VERIFY THE DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, record and erase DTCs.
3. Test drive the vehicle. If equipped with a Terrain Selector Switch drive the vehicle in each Transfer Case range and verify proper operation in each range.
4. Ignition on, engine not running.
5. With the scan tool, read DTCs.
  Is the DTC active at this time?
  
  Yes
  - Go To 2
  No
  - Go To 5
AMBIENT TEMPERATURE SENSOR
1. With the scan tool, monitor the ambient temperature in the BCM.
  Is the ambient temperature at room temperature?
  
  Yes
  - Go To 3
  No
  - Replace the Ambient Temperature Sensor in accordance with the Service Information. Refer to SENSOR, AMBIENT TEMPERATURE, REMOVAL .
  - Perform the TRANSFER CASE VERIFICATION TEST. Refer to STANDARD PROCEDURE .
VERIFY SET CONDITION
NOTE:
Check with customer on driving terrain (e.g. mud, sand, snow) for set condition.
1. With the scan tool, erase DTCs.
2. Allow the System to cool down.
3. Test drive the vehicle on dry paved road. If equipped with a Terrain Selector Switch drive the vehicle in each Transfer Case range and verify proper operation in each range.
4. With the scan tool, read DTCs.
  Does the DTC remain active?
  
  Yes
  - Go To 4
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
  - Perform the TRANSFER CASE VERIFICATION TEST. Refer to STANDARD PROCEDURE .
REAR DRIVELINE MODULE (RDM)
1. Replace the Rear Driveline Module (RDM) in accordance with the Service Information.
2. Ignition on, engine not running.
3. With the scan tool, record and erase DTCs.
4. Test drive the vehicle. If equipped with a Terrain Selector Switch drive the vehicle in each Transfer Case range and verify proper operation in each range.
5. Ignition on, engine not running.
6. With the scan tool, read DTCs.
  Does the DTC remain active?
  
  Yes
  - Replace the Drive Train Control Module (DTCM) in accordance with the Service Information. Refer to MODULE, DRIVETRAIN CONTROL, REMOVAL .
  - Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Test complete.
INTERMITTENT WIRING AND CONNECTORS
1. Using the wiring diagram/schematic as a guide, inspect the wiring harness and connectors.
2. Wiggle test the wiring harness and connectors while monitoring the scan tool data relative to this circuit.
3. Look for the data to change or for the DTC to reset during the wiggle test.
4. While monitoring the scan tool data relative to this circuit, move the selector switch to each position several times.
5. Look for the data to change other than as expected or for the DTC to reset.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the TRANSFER CASE VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time.