91B7

91B7-MISSING/IMPLAUSIBLE BUSSED REAR LIGHT-ID MESSAGE

For a complete wiring diagram Consult Diagrams/Electrical.

Theory of Operation

When powered, the Occupant Restraint Controller (ORC) performs internal circuit and Bus communication tests. Active DTC's will be set if the ORC identifies internal circuit problems, missing or invalid Bus messages. The repair of this fault condition does not involve any external circuitry and centers on verifying the integrity of the module's internal circuitry and software validity

- When Monitored:
With the ignition ON, communication established with all modules, the ORC on board diagnostics continuously performs communication tests for valid messages transmitted between modules.

- Set Condition:
This DTC will be set active if the ORC does not receive a valid Bus message containing the Rear Light-ID Bus message.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

Diagnostic Test

1. REPLACE THE ORC
NOTE: Ensure that the battery is fully charged.

Turn the ignition ON.
With the scan tool, read DTCs.


Repair

WARNING: If the Occupant Restraint Controller (ORC) is dropped at any time, it must be replaced. Failure to take proper precautions could result in accidental airbag deployment and serious or fatal injury.

WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

- Replace the ORC.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST. Verification Tests