Inspection of 4WD Control Module and Its Circuits: Notes
WARNING: This page is about a different car, the 2010 Suzuki Kizashi. However, it is still accessible from the selected car via links, so may be relevant.
4WD control module and its circuits can be checked by measuring voltage and pulse signal at connector connected to 4WD control module.
CAUTION:
4WD control module cannot be checked by itself. It is strictly prohibited to connect voltmeter or ohmmeter to 4WD control module with connectors disconnected from it.