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/Vehicle - Off
- Disconnect the electrical connector: X4 @ K9 Body Control Module
- Ignition - On/Vehicle - In Service Mode
- Test for less than 1 V between the test points: Control circuit terminal 10 X4 @ Control module harness & Ground
- If 1 V or greater
Replace the component: X51A Fuse Block - Instrument Panel
- Go to next step: If less than 1 V
- If 1 V or greater
- Momentarily connect a 3 A fused jumper wire between the test points: Control circuit terminal 10 X4 & B+
Verify the component produces a clicking sound: KR113 Child Security Lock Disable Relay
- If a click cannot be heard or felt
Replace the component: X51A Fuse Block - Instrument Panel
- Go to next step: If a click can be heard or felt
- If a click cannot be heard or felt
- Replace the component: K9 Body Control Module