F 150 2WD Pickup V8-5.4L Prop SOHC VIN Z (1998)
Alarm Module: Description and Operation
The RAP module controls the anti-theft system and the keyless entry system. The RAP module communicates with the GEM to request that the interior
lights be turned ON/OFF with use of the keyless entry remote transmitter, and the GEM communicates with the RAP module to inform when the door is
opened. REFER to Module Communications Network for inter-module communication.
The ignition lock anti-theft switch detects if the ignition key cylinder is broken or "slam pulled" during a theft. The ignition lock anti-theft switch is
always monitored by the Remote Anti-theft Personality (RAP) module. This allows the alarm system to be triggered if the ignition lock anti-theft switch
detects tampering of the ignition key cylinder (even in the event that the alarm is not active at the time).
The door open warning lamp switch communicates with the RAP module through the Generic Electronic Module (GEM). This input to the RAP module
will cause the anti-theft alarm to be sounded if the anti-theft alarm was armed.
The door disarm switches are attached to both the LH and RH lock cylinder. The door disarm switch must be triggered before the mechanical lock
unlocks. This prevents the anti-theft alarm from activating when it should have been disarmed.
In addition to the perimeter alarm that uses the door open warning lamp switch, the RAP module also uses the ignition lock anti-theft switch and the
autolock/relock feature to prevent theft of the vehicle. For a full description of the autolock/relock system, REFER to the Keyless Entry system.
