Inspection of BCM and Its Circuits: Notes
WARNING: This page is about a different car, the 2011 Suzuki SX4. 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:
If you connect a voltmeter or ohmmeter directly to the BCM by disconnecting the BCM connectors, you can damage the BCM. Never connect a voltmeter or an ohmmeter directly to any terminal on the BCM by disconnecting the BCM connectors.