Inspection of BCM and Its Circuits: Notes
WARNING: This page is about a different car, the 2008 Suzuki Grand Vitara and 2007 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.
BCM and its circuits can be checked at BCM wiring couplers by measuring voltage and resistance.
CAUTION:
BCM cannot be checked by itself. It is strictly prohibited to connect voltmeter or ohmmeter to BCM with couplers disconnected from it.