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 hood ajar switch is part of the hood latch and uses two resistors to determine the state of the hood. The body control module (BCM) apply a reference voltage on the hood ajar switch signal circuit. With the hood closed, the hood ajar switch opens and the hood ajar switch signal circuit is grounded through a 750 ohm and a 6K ohms resistor in series. When the hood is opened, the hood ajar switch closes and the hood ajar switch signal circuit is from ground through only the 750 ohm resistor. The BCM then sends a serial data message indicating the status of the hood to the instrument panel cluster (IPC), which will illuminate or displays the hood ajar indicator indicator/message as appropriate.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.