Inspection of ICM and Its Circuit: 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.
Reference: IMMOBILIZER CONTROL SYSTEM WIRING CIRCUIT DIAGRAM
ICM and its circuit can be checked at ICM wiring connector by measuring voltage.
CAUTION:
If you connect a voltmeter or ohmmeter directly to the ICM by disconnecting the ICM connector, you can damage the ICM. Never connect a voltmeter or an ohmmeter directly to any terminal on the ICM by disconnecting the ICM connector.