F 150 2WD Lightning V8-5.4L SOHC SC VIN 3 (2001)
Multifunction Electronic Control Modules: Service and Repair
Central Security Module (CSM) Module
REMOVAL
1. Disconnect the battery ground cable.
2. Remove the central security module.
1
Disconnect C257.
2
Disconnect C256.
3
Remove the nuts.
NOTE: If C256 is disconnected first, an inadvertent IGNTAM alarm event (AL_EVT) will be stored and the alarm will sound when the battery is
connected. The alarm must be disarmed by the remote unlock button or a key in the door lock cylinder to UNLOCK. To avoid this condition,
disconnect (1) C257 before (2) C256 and reconnect (2) C256 before (1) C257.
INSTALLATION
1. To install, reverse the removal procedure.
^
Check for correct operation.
NOTE: To avoid inadvertent alarm activation, reconnect C256 first.
