[Willx]

After leaving the dealership service department for another issue, I was driving around and suddenly started receiving this error message and random "BRAKE" messages from the FCW system. I pulled over to clean the radar sensor and noticed the plastic square molding with the round cutout around the radar sensor was no longer on the truck. I'm not sure if it was removed and never put back on by the service tech, or it popped off by itself.

By the time I realized what was wrong, the service department was already closed. I'm assuming the missing piece is causing the error messages. I'll update this post when I get a chance to go back to the dealership again. Just figured I'd share with you guys if you ever come across this.

Interesting, Please post a picture of that piece missing.

Thanks!

 

[Willx]

Sorry it took so long to reply, I was away on vacation. The first picture is what it is supposed to look like. The second picture shows the missing piece on my truck. I brought it to the service department today and they have to order the part. They "strongly feel" the missing cover is causing all of the error messages. I'll post the results when the part comes in.

Yes the alignment is off and the piece provides a reference angle for the view of the sensor. They are correct, it is very likely this is the cause.

As another poster noted, I wonder if this has happened before?

 

[Willx]

I wonder why Jeep put our ACC sensors in such a vulnerable spot? My MDX had the sensor in the grill behind a clear piece of plastic. It seems like that is a better solution when it comes to dealing with road debris...

I don't have enough info on the MDX to compare but on the Jeeps and similar FCA systems, there needs to be an angle distance variance between the camera and proximity sensor on the bumper. I suppose it could be higher but the masking in the system would not be nearly as affective if it was further off the ground.

Think headlights, the higher they are, the tougher it is to get good distance down the road without lighting to high in the vision area.

It is a performance balance. The closer that sensor is to the road the better it works as you drive over different grades.