LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Dodge and Ram >> 2013 >> Durango R/T, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 659 ((Drivetrain Control Module (DTCM) - Electrical Diagnostics)) >> DTC Troubleshooting >> C140A-Transfer Case Motor - Performance >> Diagnostic Test
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Test

WARNING: This page is about a different car, the 2015 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. DTC ACTIVE 
    1. Turn the ignition on.
    2. With the scan tool, record and erase DTCM DTCs.
    3. Test drive the vehicle.
    4. Turn the ignition on.
    5. With the scan tool, read DTCs.

      Is DTC active?

      Yes 

      • Go To  2

      No 

      • Go To  5
  2. (T315) STEP MOTOR CONTROL A CIRCUIT SHORTED TO GROUND 
    1. Turn the ignition off to the lock position
    2. Disconnect the Transfer Case Shift Motor/Mode Sensor Assembly harness connector.
    3. Disconnect the DTCM C2 harness connector.
    4. Turn the ignition on.
    5. Check for continuity between ground and the (T315) Step Motor Control A circuit at the Transfer Case Shift Motor/Mode Sensor Assembly harness connector.

      Is there continuity between ground and the (T315) Step Motor Control A circuit?

      Yes 

      • Repair the (T315) Step Motor Control A circuit for a short to ground.
      • Perform the TRANSFER CASE VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  3
  3. (T316) STEP MOTOR CONTROL B CIRCUIT SHORTED TO GROUND 
    1. Check for continuity between ground and the (T316) Step Motor Control B circuit at the Transfer Case Motor/Mode Sensor Assembly harness connector.

      Is there continuity between ground and the (T316) Step Motor Control B circuit?

      Yes 

      • Repair the (T316) Step Motor Control B circuit for a short to ground.
      • Perform the TRANSFER CASE VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  4
  4. (T315) STEP MOTOR CONTROL A CIRCUIT SHORTED TO THE (T316) SHIFT MOTOR CONTROL B CIRCUIT 
    1. Measure the resistance between the (T315) Step Motor Control A circuit and the (T316) Step Motor Control B circuit at the Transfer Case Motor/Mode Sensor Assembly harness connector.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Repair the (T315) Step Motor Control A circuit and the (T316) Step 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.
      • Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  5. 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 

      No 

      • Test complete.


  1. CHECK FOR AN ACTIVE DTC 
    1. Turn the ignition on.
    2. With the scan tool, read DTCM DTCs and record on work order.

      Is the DTC active at this time?

      Yes 

      • Go To  2

      No 

      • Go To  7
  2. TRANSFER CASE MOTOR (AWD) OPERATION 
    1. Turn the ignition off.
    2. Disconnect the Transfer Case Motor (AWD) C1 harness connector.
    3. Turn the ignition on.
    4. Using a 12-volt test light, jump across from the (T315) Shift Motor Control A circuit and the (T316) Shift Control Motor B circuit at the Transfer Case Motor C1 harness connector.
    5. With the scan tool, actuate the Transfer Case Motor (AWD).

      Does the test light illuminate brightly when flashing on and off?

      Yes 

      • Go To  6

      No 

      • Go To  3
  3. (T316) SHIFT CONTROL MOTOR B CIRCUIT OPEN 
    1. Measure the resistance of the (T316) Shift Control Motor B circuit between the Transfer Case Motor (AWD) C1 harness connector and the DTCM harness connector.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  4

      No 

      • Repair the open in the (T316) Shift Control Motor B circuit.
      • Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  4. (T315) SHIFT MOTOR CONTROL A CIRCUIT OPEN 
    1. Measure the resistance of the (T315) Shift Motor Control A circuit between the Transfer Case Motor (AWD) C1 harness connector and the DTCM harness connector.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  5

      No 

      • Repair the open in the (T315) Shift Motor Control A circuit.
      • Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  5. DRIVE TRAIN CONTROL MODULE (DTCM) 
    NOTE:

    Before continuing, check the DTCM harness connector terminals for corrosion, damage or terminal push out. Repair as necessary.

    1. Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.

      Were any problems found?

      Yes 

      No 

  6. TRANSFER CASE MOTOR (AWD) 
    NOTE:

    Before continuing, check the Transfer Case Motor jumper harness connector terminals for corrosion, damage or terminals push out, repair/replace as necessary.

    1. Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.

      Were any problems found?

      Yes 

      No 

  7. INTERMITTENT WIRING AND CONNECTORS 
    1. The conditions necessary to set this DTC are not present at this time.
    2. Using the schematics as a guide, inspect the wiring harness and connectors specific to this circuit.
    3. Wiggle test the wiring harness and connectors while checking for shorted and open circuits.
    4. With the scan tool, monitor the data related to this circuit while performing the wiggle test. Look for the data to change or for the DTC to reset.

      Were any problems found?

      Yes 

      No 

      • Test Complete.
scientia non olet · About LEMON Manuals