Can Bus Communication General Malfunction

WHEN MONITORED
With the ignition on.

SET CONDITION
CAN Bus communication failure between the Instrument Cluster and the CAN Bus network.

POSSIBLE CAUSES
- CAN bus circuit(s) open
- Instrument cluster

Diagnostic Test




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

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.

Q: Is the resistance below 1.0 ohm?


YES: Go to 2
NO: Repair the CAN C Bus (+) circuit for an open. Perform ABS VERIFICATION TEST.




2. MEASURE THE RESISTANCE OF THE CAN C BUS (-) CIRCUIT

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.

Q: Is the resistance below 1.0 ohm?

YES: Replace the Instrument Cluster. Perform ABS VERIFICATION TEST.
NO: Repair the CAN C Bus (-) circuit for an open. Perform ABS VERIFICATION TEST.