Diagnostic Test

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

Fig 1: Checking CAN C BUS (+) Circuit
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the Instrument Cluster harness connector.

Disconnect the harness connectors of the other modules on the CAN Bus network.

NOTE: Check connectors - Clean/repair as necessary.

Measure the resistance of the CAN C Bus (+) circuit from the Instrument Cluster harness connector to the harness connectors of the other modules on the CAN Bus network.

Is the resistance below 1.0 ohm?

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

Fig 2: Checking CAN C BUS (-) Circuit
Courtesy of DAIMLERCHRYSLER CORP.

With the ignition off.

Measure the resistance of the CAN C Bus (-) circuit from the Instrument Cluster harness connector to the harness connectors of the other modules on the CAN Bus network.

Is the resistance below 1.0 ohm?

Yes
1. Replace the Instrument Cluster. (Refer to ELECTRICAL/INSTRUMENT CLUSTER - REMOVAL) .
2. Perform ABS VERIFICATION TEST .
No
1. Repair the CAN C Bus (-) circuit for an open.
2. Perform ABS VERIFICATION TEST .