Normal Operation
WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
The Restraints Control Module (RCM) checks the LH front impact severity sensor and circuits for the following faults:
- Open circuit
- Short to voltage
- Short to ground
- Faulted LH front impact severity sensor
If a fault is detected, the RCM will store DTC B0090:11 or B0090:93 in memory and send a message to the Instrument Panel Cluster (IPC) to illuminate the air bag warning indicator.
- DTC B0090:11 (Left Frontal Restraints Sensor: Circuit Short to Ground) - When the RCM senses a short to ground on the LH front severity impact sensor feed circuit, a fault will be indicated.
- DTC B0090:93 (Left Frontal Restraints Sensor: No Operation) - When the RCM senses a faulted sensor, a short to voltage on the feed circuit or an open feed or return circuit, a fault will be indicated.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- LH front impact severity sensor
- RCM