Ford 2003 Mustang Workshop Manual page 4014

Driver Air Bag Module
The driver air bag module:
is installed as an assembly.
is mounted in the center of the steering wheel.
Clockspring
The clockspring:
is mounted on the steering column, behind the steering wheel.
provides a continuous electrical path from the restraints control module (RCM) to the driver air
bag.
Passenger Air Bag Module
The passenger air bag module:
is installed as an assembly.
is mounted in the RH side of the instrument panel.
Restraints Control Module (RCM)
The restraints control module (RCM) performs the following functions:
signals the inflators to deploy the air bags in the event of a deployable crash.
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 or historical diagnostic trouble
codes (DTCs).
signals the generic electronic module (GEM) to activate a chime if the air bag indicator is not
available and another SRS fault exists.
NOTE: The safing sensor is internal to the RCM and is not repaired separately.
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 bag indicator located in the instrument cluster.
When the ignition is cycled (turned off and then on), the air bag indicator will begin its prove out
sequence. During prove out the air bag indicator will illuminate for six seconds, go off for two seconds
and then, if a system fault exists, flash the two-digit LFC. The air bag indicator will flash the LFC five
times, then it will remain illuminated for the rest of the key cycle. The RCM will also communicate the