DTC Troubleshooting

WARNING: This page is about a different car, the 2006 Suzuki XL-7. However, it is still accessible from the selected car via links, so may be relevant.

TEST PROCEDURE - ILLUMINATION CONTROL INPUT CIRCUIT OPEN

Step	Action	YES	NO
1	Disconnect illumination controller coupler from illumination controller. Check illumination controller referring to ILLUMINATION CONTROLLER INSPECTION . Is it good condition?	Go to Step 2.	Replace illumination controller.
2	With ignition switch ON, measure voltage between "RED/GRN" circuit terminal of illumination controller coupler and body ground. Is voltage 4.5 - 5.5 V?	Go to Step 3.	"RED/GRN" circuit open or short to ground. If wire and connection are OK, substitute a known-good BCM and recheck.
3	Measure resistance between illumination controller coupler and "G53-13" terminal of BCM connector. Is resistance infinity?	"GRY/YEL" wire open.	Replace BCM.