FORD 2004 F-150 v.1 - Manual (Page 122)

If the air bag has deployed, the air bag will not function
again and must be replaced immediately. If the air bag is not
replaced, the unrepaired area will increase the risk of injury in a
collision.
The SRS consists of:
• driver and passenger air bag modules (which include the inflators,
covers and air bags),
• Occupation Classification Sensor (OCS)
• one or more impact and safing sensors, passenger air bag On/Off
switch (if equipped) and diagnostic monitor (RCM)
• a readiness light and tone,
• and the electrical wiring which connects the components.
The RCM (restraints control module) monitors its own internal circuits
and the supplemental air bag electrical system wiring (including the
passenger air bag On/Off switch, the impact sensors, the system wiring,
the air bag system readiness light, the air bag back up power and the air
bag ignitors).
Determining if the system is operational
The SRS uses readiness lights in the instrument cluster and the
passenger air bag on/off switch or a tone to indicate the condition of the
system. Refer to the Air bag readiness section in the Instrument
cluster chapter or Passenger air bag on/off switch section in this
chapter. Routine maintenance of the air bag is not required.
A difficulty with the system is indicated by one or more of the following:
• The readiness lights will either
flash or stay lit.
• The readiness lights will not
illuminate immediately after
ignition is turned on.
• A series of five beeps will be heard. The tone pattern will repeat
periodically until the problem and/or light are repaired.
If any of these things happen, even intermittently, have the SRS serviced
at your dealership or by a qualified technician immediately. Unless
serviced, the system may not function properly in the event of a
collision.
Seating and Safety Restraints
122