Normal Operation
WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
The Occupant Classification System Module (OCSM) monitors each Occupant Classification Sensor (OCS) weight sensor bolt and circuitry for faults. If the OCSM detects a fault, it will store DTC B1A59:01 in memory and send a message to the Restraints Control Module (RCM).
The RCM will store DTC B00A0:09 in memory and send a message to the Instrument Cluster (IC) module to illuminate the air bag warning indicator.
- DTC B1A59:01 (Sensor 5 Volt Supply: General Electrical Failure) - When the OCSM senses a short between the Belt Tension Sensor (BTS) VREF circuit and one of the OCS weight sensor bolt VREF circuits, a fault will be indicated.
- DTC B1A59:11 (Sensor 5 Volt Supply: Circuit Short To Ground) - When the OCSM senses a short to ground on any of the OCS weight sensor bolt or BTS VREF circuits, a fault will be indicated.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- OCSM
- OCS weight sensor bolt assembly