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HOMESERVICE MANUALSDODGE AND RAM20151500 SPECIAL SERVICEREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTCOMMUNICATION DEVICES(DRIVETRAIN CONTROL MODULE (DTCM) - ELECTRICAL DIAGNOSTICS - 1500)DIAGNOSIS AND TESTINGC1477-TRANSFER CASE CLUTCH OVER TEMPERATUREDIAGNOSTIC TEST
2015 Dodge and Ram 1500 Special Service

Diagnostic Test

2015 Dodge and Ram 1500 Special ServiceSECTION Diagnostic Test
  1. ANTI-LOCK BRAKE SYSTEM (ABS) MODULE DTCS PRESENT 
    1. Ignition on, engine not running.
    2. With the scan tool, read DTCs in the ABS Module.

      Are there any ABS DTCs present?

      Yes 

      No 

      • Go To  2
  2. VERIFY THE DTC IS ACTIVE 
    1. With the scan tool, read DTCs.

      Is the DTC active at this time?

      Yes 

      • Go To  3

      No 

      • Go To  6
  3. VERIFY SET CONDITION 
    NOTE:

    Check with customer on the driving terrain when the code set (e.g. mud, sand, snow).

    1. Allow the Transfer Case to cool down.
    2. With the scan tool, erase DTCs.
    3. Test drive vehicle on a straight dry paved road.
    4. With the scan tool, read DTCs.

      Is the status Active for this DTC?

      Yes 

      • Go To  4

      No 

      • Go To  6
  4. (K504) DRIVE TRAIN 5-VOLT SUPPLY 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 harness connector.
    4. Measure the resistance between ground and the (K504) Drive Train 5-volt Supply circuit.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Repair the (K504) Drive Train 5-volt Supply circuit for a short to ground.
      • Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  5
  5. DRIVE TRAIN CONTROL MODULE (DTCM) 
    1. Using the wiring diagram/schematic as a guide, inspect all wiring and connectors that pertain to this circuit.

      Were any problems found?

      Yes 

      No 

      • Replace the Drive Train Control Module (DTCM) in accordance with the Service Information.
      • Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  6. 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 (if equipped).
    6. Look for the data to change other than as expected or for the DTC to reset.

      Were there any problems found?

      Yes 

      No 

      • Test Complete.
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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.