Body Control Module: Description and Operation

BCM General Description

The BCM incorporates relays and controllers which are used for the following systems and controls them.

- Power door lock
- Keyless entry (if equipped)
- Door lock function of keyless start system (if equipped)
- Rear wiper
- Interior light / luggage room light
- Rear end door window defogger and door mirror heater (if equipped)
- DRL (if equipped)
- Auto-on headlight (if equipped)
- Front fog light (if equipped)
- Theft deterrent light
- Panic alarm function
- Clearance light
- Illumination control (if equipped)
- Tire Pressure Monitoring System (TPMS) (if equipped)

Also, the BCM has a function to cause the interior light and open door warning light in the combination meter to turn off when any door is left open for longer than 15 minutes to reduce wasteful battery consumption.

In addition, it is possible to check operation of actuator which is controlled by BCM by using the output test function of SUZUKI scan tool to operate actuator similarly.