CL V6-3.2L SOHC (2002)
Alarm Module: Description and Operation
How the Circuit Works.
The immobilizer system is designed to prevent the car from being started without the owner's ignition key. If an attempt is made to start the car with any
other key, the immobilizer system will disable the car's fuel supply.
The immobilizer system consists of the ignition key, immobilizer receiver unit, immobilizer indicator, PGM-FI main relay, fuel pump, and the PCM.
With the ignition switch in ON (II) or START (III), the immobilizer receiver unit and the PCM receive an "ignition on" signal through fuse 46 and the
PGM-FI main relay. The PCM then sends power to the ignition key transponder through the immobilizer receiver unit. The transponder then sends a
coded signal back to the PCM through the receiver. If the signal is correct, the PCM will energize the car's fuel supply system by grounding the PGM-FI
main relay. The immobilizer indicator light flashes a code to indicate that the correct key has been inserted. If the ignition key signal is not correct, the
PCM will not energize the car's fuel supply system by not grounding the PGM-FI main relay. The immobilizer indicator light then flashes a code to
indicate that an incorrect key has been inserted.