Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Circuit/System Description
The BCM supplies a 12V signal to 2 ajar switches to indicate the status of the liftgate. The liftgate ajar switches are normally open when the liftgate and liftglass are fully closed. When the liftgate or liftglass is opened, the ajar switch contacts close providing a path to ground. The instrument panel cluster (IPC) receives a serial data message from the BCM indicating the liftgate ajar status and the driver information center (DIC) will display the REAR ACCESS OPEN message.
The rear window wiper motor also monitors the liftgate ajar signal circuit and will disable the rear wiper function if it detects that the liftgate or liftglass is open or ajar.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.