Diagnostic Test

VERIFY THE DTC ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, record and erase DTCs.
3. Test drive the vehicle.
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
  - Test complete.
(T315) SHIFT MOTOR CONTROL A CIRCUIT SHORTED TO GROUND
1. Turn the ignition off to the lock position.
2. Disconnect the ECC Actuator C2 harness connector.
3. Disconnect the DTCM C2 harness connector.
4. Ignition on, engine not running.
5. Measure the resistance between ground and the (T315) Shift Motor Control A circuit at the Transfer Case Shift Motor/Mode Sensor Assembly harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Repair the (T315) Shift Motor Control A circuit for a short to ground.
  - Perform the TRANSFER CASE VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 3
(T316) SHIFT MOTOR CONTROL B CIRCUIT SHORTED TO GROUND
1. Measure the resistance between ground and the (T316) Shift Motor Control B circuit at the Transfer Case Motor/Mode Sensor Assembly harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Repair the (T316) Shift Motor Control B circuit for a short to ground.
  - Perform the TRANSFER CASE VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 4
(T315) SHIFT MOTOR CONTROL A CIRCUIT SHORTED TO THE (T316) SHIFT MOTOR CONTROL B CIRCUIT
1. Measure the resistance between the (T315) Shift Motor Control A circuit and the (T316) Shift Motor Control B circuit at the ECC Actuator harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Repair the (T315) Shift Motor Control A circuit and the (T316) Shift Motor Control B circuit for a short.
  - Perform the TRANSFER CASE VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - 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 .
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.
5. While monitoring the scan tool data relative to this circuit, move the selector switch to each position several times.
6. Look for the data to change other than as expected or for the DTC to reset.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Test complete.