Diagnostic Test

Ignition on, engine not running.

With the scan tool, read DTCs in the FDCM.

Is the status Active for this DTC? 

Yes 

1. Go to  2).

No 

1. Go to  4).

Fig 1: Checking Drivetrain 5 Volt Supply Circuit High Resistance

Courtesy of CHRYSLER LLC

Turn the ignition off to the lock position

Disconnect the Transfer Case Motor harness connector.

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  3).

Fig 2: Checking Drivetrain Sensor Return Circuit High Resistance

Courtesy of CHRYSLER LLC

Measure the resistance of the (K594) Drivetrain Sensor Return 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 (K594) Drivetrain Sensor Return circuit for an open.
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 .

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.