Circuit/System Testing
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at the I/P multifunction switch assembly.
- Test for less than 1.0 ohm between ground circuit terminal 3 and ground.
- If greater than the specified range, test the ground circuit for a short to voltage or an open/high resistance.
- Ignition ON, transmission in REVERSE, verify that the scan tool Park Assist System Status parameter is Enable.
- If not the specified value, test the signal circuit terminal 2 for a short to ground. If the circuit tests normal, test or replace the object alarm module.
- Connect a 10A fused jumper wire between signal circuit terminal 2 and ground.
- Ignition ON, transmission in REVERSE, verify that the scan tool Park Assist System Status parameter is Disable.
- If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, test or replace the object alarm module.
- If all circuits test normal, test or replace the I/P multifunction switch assembly.