Circuit/System Testing
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Liftglass Ajar Switch Malfunction
- Ignition OFF, disconnect the harness connector at the liftgate window latch assembly.
- Test for less than 5 Ω between the ground circuit terminal 3 and ground.
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Ignition ON, verify the scan tool Liftgate Ajar Switch parameter is Inactive.
- If not the specified value, test the signal circuit terminal 4 for a short to ground. If the circuit tests normal, replace the liftgate module.
- Install a 3A fused jumper wire between the signal circuit terminal 4 and ground. Verify the scan tool Liftgate Ajar Switch parameter is Active.
- If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the liftgate module.
- If all circuits test normal, test or replace the liftgate window latch assembly.
Liftgate Latch Assembly Malfunction
- Ignition OFF, disconnect the harness connector at the liftgate latch assembly.
- Ignition ON, verify the scan tool LGM Latch Ratchet Sw. parameter is Inactive.
- If not the specified value, test the signal circuit terminal 6 for a short to ground. If the circuit tests normal, replace the liftgate module.
- Install a 3A fused jumper wire between the signal circuit terminal 6 and ground. Verify the scan tool LGM Latch Ratchet Sw. parameter is Active.
- If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the liftgate module.
- If all circuits test normal, test or replace the liftgate latch assembly.