Normal Operation
The Occupant Classification System Module (OCSM) monitors the pressure sensor and circuity for faults. If the OCSM detects a fault with the sensor or circuitry, it will store DTC B2290 in memory and send a message to the Restraints Control Module (RCM) which will store DTC B00A0:09 in memory and send a message to the Instrument Cluster (IC) module to illuminate the air bag warning indicator.
The Occupant Classification Sensor (OCS) system components are not to be installed separately. If a new OCS system component or seat cushion foam pad are needed, a new OCS system service kit must be installed as an assembly.
FAULT TRIGGER CONDITION CHART
| Fault PIDs(1) | Description | Fault Trigger Condition | ||
|---|---|---|---|---|
| 2290___12___OD and 2290___12___CM | Passenger Seat OCS Sensor No. 1 Circuit Short to Battery | When the OCSM senses a short to voltage on the bladder pressure sensor circuits, a fault will be indicated. | ||
| 2290___13___OD and 2290___13___CM | Passenger Seat OCS Sensor No. 1 Circuit Short to Ground | When the OCSM senses a short to ground on the bladder pressure sensor circuits, a fault will be indicated. | ||
| 2290___15___OD and 2290___15___CM | Passenger Seat OCS Sensor No. 1 Internal Fault | When the OCSM senses a internal failure with the bladder pressure sensor, a fault will be indicated. | ||
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This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Faulty OCS system component
- Pressure sensing fault
- Module mounting condition