Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSDODGE AND RAM20151500 SPECIAL SERVICEREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTCOMMUNICATION DEVICES(DRIVETRAIN CONTROL MODULE (DTCM) - ELECTRICAL DIAGNOSTICS - 1500)DIAGNOSIS AND TESTINGC140A-TRANSFER CASE MOTOR PERFORMANCEDIAGNOSTIC TEST

2015 Dodge and Ram 1500 Special Service

Diagnostic Test

2015 Dodge and Ram 1500 Special ServiceSECTION 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
  - Go To 5
(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. Ignition on, engine not running.
5. Measure the resistance between ground and the (T315) Step 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) Step Motor Control A circuit for a short to ground.
  - Perform the TRANSFER CASE VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 3
(T316) STEP MOTOR CONTROL B CIRCUIT SHORTED TO GROUND
1. Measure the resistance between ground and the (T316) Step 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) Step Motor Control B circuit for a short to ground.
  - Perform the TRANSFER CASE VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 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 5.0 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 .
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 for corrosion, water intrusion, proper pin tension and bent or broken pins/terminal ends.
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.

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.