Honda/Acura Easy Backup Sensor Diagnostics

The 2016 Honda Pilot may have optional backup sensors.

A large number of today’s vehicles are equipped with backup or park assist sensors. Sensors can be damaged in collisions, making diagnosis difficult. However, Honda/Acura has an easier way to inform technicians which sensor may be damaged.

If the sensors are a factory accessory, they may not be able to be diagnosed with a scan tool. When the ignition is turned on, the sensors may beep one time. If the sensors beep more than once, the pattern of the beeps indicates which sensor or sensors are defective.

The document Model Series Backup Sensors User’s Information Manual can be found by searching for a year, model, and Accessory Related Info in the select subject dropdown. Per the Honda/Acura Repair Manual:

"Corner Sensors

  • Two fast beeps: right sensor is faulty.
  • Three fast beeps: left sensor is faulty.
  • Four fast beeps: both right and left sensors are faulty.

Center Sensors

  • Two slow beeps: right sensor is faulty.
  • Three slow beeps: left sensor is faulty.
  • Four slow beeps: both right and left sensors are faulty.

Be careful not to confuse the sensor sounds with sounds from other vehicle components."

Also noted, the sensors may not sound if the temperatures are below -4°F or above 122°F. This information helps technicians quickly locate which sensor is damaged. Visit techinfo.honda.com for more information.


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