Vehicle Security System Alarm Operation
The vehicle security system is triggered by:
- Opening a door
- Opening the hood.
Once the vehicle security system is in armed phase, if the smart entrance control unit receives a ground signal at terminal 1, 2, or 3 (Crew Cab) or 6 (hood switch), the vehicle security system will be triggered. The horn and headlamps operate intermittently and the starting system is interrupted.
With the ignition switch in the ON or START position, power is supplied:
- Through 10A fuse [No. 5, located in the fuse block (J/B)].
- To vehicle security relay terminal 2.
If the vehicle security system is triggered, ground is supplied:
- To vehicle security relay terminal 1
- Through smart entrance control unit terminal 40.
With power and ground supplied, starter motor circuit is interrupted. The starter motor will not crank and the engine will not start.
Power is supplied at all times:
- Through 15A fuse (No. 32, located in fuse and fusible link box)
- To horn relay terminal 3.
When the vehicle security system is triggered, power is supplied intermittently:
- To vehicle security lamp relay terminal 1
- Through smart entrance control unit terminal 39.
Ground is supplied:
- To vehicle security lamp relay terminal 2
- Through body grounds E54 and E12.
When the vehicle security system is triggered, ground is supplied intermittently:
- To horn relay terminal 2
- Through smart entrance control unit terminal 42.
The horn and headlamps operate intermittently.
The alarm automatically turns off after 50 seconds but will reactivate if the vehicle is tampered with again.