Restraints Control Module (RCM)

WARNING: This page is about a different car, the 2013 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: If a vehicle has been in a crash, inspect the restraints control module (RCM) and the impact sensor (if equipped) mounting areas for deformation. If damaged, restore the mounting areas to the original production configuration. A new RCM and sensors must be installed whether or not the airbags have deployed. Failure to follow these instructions may result in serious personal injury or death in a crash.

NOTE: Carrying out Programmable Module Installation (PMI) will not enable the 911 assist option that is disabled.

The RCM carries out the following functions:

Activates the driver, passenger and/or side air bag modules depending upon vehicle impact severity and the sensor inputs.
Activates the driver and passenger retractor pretensioner(s) to control the tension of the driver and passenger safety belts in the event of a deployable crash
Monitors the SRS for faults
Sends a message to the IPC to illuminate the air bag warning indicator if a fault is detected
Communicates through the Data Link Connector (DLC) the current or historical DTCs

The RCM monitors the SRS for possible faults. If a fault is detected, the RCM will request the IPC to illuminate the air bag warning indicator. When the ignition is turned OFF and then ON, the IPC will prove out the air bag warning indicator by lighting for 6 seconds. If no faults are detected by the RCM, the IPC will turn the air bag warning indicator off and it will remain off. If the RCM detects a fault, it will send a message to the IPC to turn the air bag warning indicator on and it will remain on for the rest of the ignition cycle. If the RCM requests illumination of the air bag warning indicator and the air bag warning indicator does not function, the IPC will automatically activate an audible chime. The chime is a series of 5 sets of 5 tone bursts. If the chime is heard, the SRS and the air bag warning indicator require repair.

The RCM includes a backup power supply. This feature provides sufficient backup power to deploy the air bags in the event that the ignition circuit is lost or damaged during impact. The backup power supply will deplete its stored energy approximately one minute after power and/or ground has been removed from the RCM.