Download 2018 Honda Ridgeline Backup Sensors User’s Information Manual – How the Backup Sensors Work Backup Sensors The sensors are ready for operation when the backup sensor switch is turned to ON, and the shift lever is moved to Reverse. The sensors operate by emitting ultrasonic waves. They calculate the distance between each sensor and an object by measuring the time it takes for the ultrasonic waves to reach the sensor after being reflected by an object. The sensors are designed to beep when the rear bumper is approaching an object. The sensors detect the closest object. The sensors may not detect taller vehicles or objects.
While driving in reverse and towing, the system will beep. When this occurs, turn the backup sensor switch to OFF. The sensors may not work if the object has an odd shape or is made of a material that does not reflect ultrasonic waves. The sensors may not work if your garage door uses electronic sensors. The sensors may not work if the ambient air temperature is below -4° F (-20° C) or above 122° F (50° C). Limitations The system may sound a warning even if there is no object behind the vehicle: • If a sensor is covered with frozen water. • If a sensor is covered with snow, dirt, or mud. When driving in reverse, the sensors may sound continuously under the following conditions: