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.
Object Alarm Sensor
The rear object alarm systems are equipped with 4 ultrasonic sensors located on the rear bumpers of the vehicle. These sensors are used to monitor how close the vehicle is to an object. The object alarm sensors receive the echo signals reflected off an object of interest while the vehicle is backing up at speeds less than 8 km/h (5 mph). The object alarm sensor is a three wire sensor comprising of the supply voltage circuit, signal circuit and the low reference circuit. Power is provided to the object alarm sensor via the supply voltage circuit from the object alarm module. The object alarm module also provides ground to the object alarm sensor via the object alarm sensor low reference circuit. The typical object detection alarm sensor signal voltage when the system is active is between 7.2 V - 9.2 V.
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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.