Circuit/System Testing

WARNING: This page is about a different car, the 2007 Suzuki XL7. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: It is recommended that component testing is performed before circuit testing when diagnosing steering wheel controls.

WARNING: Refer to SIR CAUTION .

Ignition OFF, disconnect the harness connector at the right steering wheel control switch.
Ignition ON, test for ignition voltage between the ignition circuit terminal 3 and ground.
- If less than specified value, test the ignition circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the BCM.
Test for the 0 volts between the signal circuit terminal 4 and ground.
- If greater than specified value, test the signal circuit for a short to voltage. If the circuit tests normal, replace the BCM.
Test for ignition voltage between the ignition circuit terminal 3 and the signal circuit terminal 4.
- If less than specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the BCM.
Ignition OFF, disconnect the C1 harness connector at the BCM.
Test for infinite resistance between the signal circuit terminal 6 and ground.
- If not the specified value, test the signal circuit for a short to ground.
If all circuits test normal, test or replace switch.