Circuit/System Testing
WARNING: This page is about a different car, the 2018 Buick Envision. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the X2 harness connector at the K171 Hands-Free Liftgate Sensor Control Module.
- Test for less than 1 Ω between the B275A Hands-Free Liftgate Sensor - Upper signal circuit terminal 1 and the signal circuit terminal 2.
- If 1 Ω or greater
Replace the B275A Hands-Free Liftgate Sensor - Upper
- Go to next step: If less than 1 Ω
- If 1 Ω or greater
- Ignition OFF, disconnect the X3 harness connector at the K171 Hands-Free Liftgate Sensor Control Module.
- Test for less than 1 Ω between the B275B Hands-Free Liftgate Sensor-Lower signal circuit terminal 1 and the signal circuit terminal 2.
- If 1 Ω or greater
Replace the B275B Hands-Free Liftgate Sensor-Lower
- Go to next step: If less than 1 Ω
- If 1 Ω or greater
- If all circuits test normal, replace the K171 Hands-Free Liftgate Sensor Control Module.