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.
Parking Aid Module
The parking aid module is connected to the ISO 9141 communication network. The parking aid module receives input from sensors in the rear bumper that detect close objects when the transmission is in REVERSE, and the vehicle speed is above 0 km/h (0 mph) and below 8 km/h (5 mph). The ISO 9141 communication network does not function if the wire is shorted to ground or battery voltage. Check the network circuit between the parking aid module C4014 and the DLC C251. Total resistance value must not be more than 5 ohms. If the resistance is more than 5 ohms, there is an open circuit in the ISO 9141 communication network, damage to the DLC C251, damage to the parking aid module connector, or a problem in the in-line connector. For additional information, refer to PARKING AID .
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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.