Inspection of 4WD Control Module and Its Circuits: Notes
WARNING: This page is about a different car, the 2007 Suzuki SX4. However, it is still accessible from the selected car via links, so may be relevant.
4WD control module and its circuits can be checked at coupler connected to 4WD control module by measuring voltage, pulse signal.
CAUTION:
4WD control module cannot be checked by itself. It is strictly prohibited to connect voltmeter or ohmmeter to 4WD control module with couplers disconnected from it.