Restraints Control Module (RCM): Notes
NOTE:
Diagnosis by substitution from a donor vehicle is NOT
acceptable. Substitution of control modules does not guarantee confirmation of a fault and may also cause additional faults in the vehicle being checked and/or the donor vehicle.
The Restraints Control Module (RCM) is installed on the top of the transmission tunnel, in line with the 'B' pillars, and controls operation of the Supplemental Restraint System (SRS).
The main functions of the RCM include:
- Crash detection and recording
- Airbag and pretensioner firing
- Self-test and system monitoring, with status indication via the airbag warning indicator and non-volatile storage of fault information.
- Supply of yaw rate and lateral acceleration data for the Anti-lock Brake System (ABS) control module
- Control of the pedestrian protection system (where fitted)
The RCM determines which elements of the SRS are to be deployed by using two internal areas:
- Crash severity evaluation
- Deployment handler