Ford Workshop Manuals
E 150 V8-4.6L SOHC VIN W (2004)
Relays and Modules > Relays and Modules - Restraint Systems > Air Bag Control Module > Component Information > Service Precautions > Page 1968
Air Bag Control Module: Description and Operation
RESTRAINTS CONTROL MODULE (RCM)
WARNING: The restraints control module (RCM) orientation is critical for correct air bag supplemental restraint system (SRS) operation.
When installing a new restraints control module (RCM), always make sure the correct RCM is being installed. If an incorrect RCM is installed,
The RCM has a protective cover that must be removed prior to removal of the RCM or during diagnostic procedures.
The restraints control module (RCM) is attached to a bracket, mounted under the front driver seat. The RCM carries out the following functions:
supplies current flow to the inflators to deploy the air bags in the event of a deployable crash.
activates the safety belt buckle pretensioners to remove slack from the safety belt.
monitors the air bag supplemental restraint system (SRS) for faults.
illuminates the air bag indicator if a fault is detected.
flashes the air bag indicator to indicate the lamp fault code (LFC) detected.
communicates through the data link connector (DLC) the current (on-demand) or historical (continuous) diagnostic trouble codes (DTCs).
signals the instrument cluster module to activate a chime if the air bag indicator is not available and another SRS fault exists.
contains an internal safing sensor which is not serviced separately.
records deployment event data.
The RCM monitors the SRS for possible faults. If a fault is detected while the ignition switch is in the RUN position, the RCM will illuminate the air
When the ignition is cycled (turned off and then on), the air bag indicator will remain lit for six seconds and then go out. If an SRS fault exists, the air
LFCs are prioritized. If two or more faults occur at the same time, the fault having the highest priority will be displayed first. After that fault has been
The RCM includes a backup power supply. This feature provides sufficient energy to deploy the front air bags and safety belt buckle pretensioners in
|[PREV PAGE] [NEXT PAGE]|