Diagnostic Test

1) MEASURE THE RESISTANCE OF THE CAN B BUS (+) CIRCUIT

Fig 1: Checking CAN B Bus (+) Circuit Resistance
Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the CAB harness connector.

Disconnect the BCM harness connector.

NOTE: Check connectors - Clean/repair as necessary.

Measure the resistance of the CAN B Bus (+) circuit from the CAB harness connector to the BCM harness connector.

Is the resistance below 1.0 ohm?

Yes
1. Go to 2).
No
1. Repair the CAN B Bus (+) circuit for an open.
2. Perform BODY VERIFICATION TEST .
2) MEASURE THE RESISTANCE OF THE CAN B BUS (-) CIRCUIT

Fig 2: Measuring Resistance Of CAN B Bus (-) Circuit
Courtesy of CHRYSLER LLC

Measure the resistance of the CAN B Bus (-) circuit from the CAB harness connector to the BCM harness connector.

Is the resistance below 1.0 ohm?

Yes
1. Replace the Controller Antilock Brake Module. Refer to REMOVAL .
2. Perform BODY VERIFICATION TEST .
No
1. Repair the CAN B Bus (-) circuit for an open.
2. Perform BODY VERIFICATION TEST .