Normal Operation
WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. 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, B0090:81, B0090:93 or B0090:96 in memory and send a message to the Instrument Cluster (IC) module 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 feed circuit of the LH front severity impact sensor, 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, open on the 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