No OCM Message

NO OCM MESSAGE







Theory of Operation

When powered, the Occupant Classification Module (OCM) broadcasts a status message on the Bus once every second. The Occupant Restraint controller (ORC) monitors the bus for the OCM messages. The ORC will set this DTC if the messages are not received.

- When Monitored:
With the ignition on.

- Set Condition:
The Occupant Classification Module (OCM) broadcasts a status message on the Bus once every second. The ORC will set this DTC if the OCM status message is not received for 10 consecutive seconds.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Restraints System Pre-Diagnostic Procedure.

1. DETERMINE ACTIVE OR STORED DTC

NOTE: Ensure that the battery is fully charged.

1. Turn the ignition on.
2. With the scan tool, read the ORC DTC.

Does the scan tool display an active: NO OCM MESSAGE DTC?

Yes

- Go To 2

No

- Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. Restraint System Intermittent Test.

2. VERIFY THAT THE OCM IS ACTIVE ON THE BUS
1. With the scan tool, attempt to communicate with the OCM.

Does the scan tool communicate with the OCM?

Yes

- WARNING: If the Occupant Restraint Controller (ORC) is dropped at any time, it must be replaced. Failure to take the proper precautions could result in accidental airbag deployment and serious or fatal injury.
WARNING: Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

- Replace the ORC.
- Perform the RESTRAINT SYSTEM VERIFICATION TEST. Restraints System Verification Test.

No

- Perform the NO RESPONSE FROM OCCUPANT CLASSIFICATION MODULE. No Response From OCM (Occupant Classification Module).