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Diagnostic Test

  1. 1) T-CASE POSITION SENSOR VOLTAGE BELOW 0.4 VOLTS 

    Ignition on, engine not running.

    With the scan tool, read the T-Case Position Sensor voltage in the Final Drive Control Module.

    Is the voltage below 0.4 volts? 

    Yes 

    1. Go to  2).

    No 

    1. Go to  7).
  2. 2) (K504) DRIVETRAIN 5 VOLT SUPPLY CIRCUIT VOLTAGE 
    Fig 1: Checking Drivetrain 5 Volt Supply Circuit Voltage
    GC0027378Courtesy of CHRYSLER LLC

    Turn the ignition off to the lock position

    Disconnect the Transfer Case Motor harness connector.

    Ignition on, engine not running.

    Measure the voltage of the (K504) Drivetrain 5-volt Supply circuit.

    Is the voltage below 0.2 volts? 

    Yes 

    1. Go to  3).

    No 

    1. Go to  5).
  3. 3) (K504) DRIVETRAIN 5 VOLT SUPPLY CIRCUIT OPEN 
    Fig 2: Checking Drivetrain 5 Volt Supply Circuit High Resistance
    GC0027379Courtesy of CHRYSLER LLC

    Turn the ignition off to the lock position

    Disconnect the Final Drive Control Module C2 harness connector.

    Measure the resistance of the (K504) Drivetrain 5-volt Supply circuit between the Transfer Case Motor harness connector and the Final Drive Control Module C2 harness connector.

    Is the resistance above 5.0 ohms? 

    Yes 

    1. Repair the (K504) Drivetrain 5-volt Supply circuit for an open.
    2. Perform TRANSFER CASE VERIFICATION TEST .

    No 

    1. Go to  4).
  4. 4) (K504) DRIVETRAIN 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND 
    Fig 3: Checking Drivetrain 5 Volt Supply Circuit For Short To Ground
    GC0027380Courtesy of CHRYSLER LLC

    Measure the resistance between ground and the (K504) Drivetrain 5-volt Supply circuit.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Repair the (K504) Drivetrain 5-volt Supply circuit for a short to ground.
    2. Perform TRANSFER CASE VERIFICATION TEST .

    No 

    1. Replace the Final Drive Control Module in accordance with the Service Information.
    2. Perform TRANSFER CASE VERIFICATION TEST .
  5. 5) TRANSFER CASE MOTOR 

    With the scan tool, read the T-Case Position Sensor voltage in the Final Drive Control Module.

    Is the voltage above 4.5 volts? 

    Yes 

    1. Replace the Transfer Case Motor in accordance with the Service Information.
    2. Perform TRANSFER CASE VERIFICATION TEST .

    No 

    1. Go to  6).
  6. 6) (T313) MODE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND 
    Fig 4: Checking Mode Sensor Signal Circuit For Short To Ground
    GC0027383Courtesy of CHRYSLER LLC

    Measure the resistance between ground and the (T313) Mode Sensor Signal circuit.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Repair the (T313) Mode Sensor Signal circuit for a short to ground.
    2. Perform TRANSFER CASE VERIFICATION TEST .

    No 

    1. Replace the Final Drive Control Module in accordance with the Service Information.
    2. Perform TRANSFER CASE VERIFICATION TEST .
  7. 7) INTERMITTENT WIRING AND CONNECTORS 

    The conditions necessary to set this DTC are not present at this time.

    Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.

    While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors.

    Look for the data to change or for the DTC to reset during the wiggle test.

    Were any problems found? 

    Yes 

    1. Repair as necessary.
    2. Perform TRANSFER CASE VERIFICATION TEST .

    No 

    1. Test complete.
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