Minnie Pearl
Active Member
- Joined
- Oct 25, 2021
- Messages
- 52
- Reaction score
- 17
Anyone have proximity sensor or horn issues? Well today (8/15/22) in the Bryan, Wal Mart parking lot handicap spot (the first time I drove truck and only 4 miles from when I got it back on 8/1) as I pulled up to the sign post, the dash proximity display came on, the yellow, then red proximity sensor lights and alarm horn activated and stayed on, for the middle and right side sensors until I put the selector in Park. All this is normal as I had parked left of center of the concrete sign post. After shopping, I started the truck and backed out, the yellow and red displays were lite, and the alarm horn was on steady as I backed away. The displays cleared and the horn did too (normal for the distance from the post). The rear blind spot proximity sensors switched on, and a horn sounded, as there was an advancing truck behind me (again, normal). I pulled forward, back into the parking spot, reactivating the front yellow sensors and horn. The truck moved on, and I backed out of the spot again. The yellow displays cleared, but the horn did not. I stopped in the traffic lane and moved the gear shift from Reverse to Drive, & back to Reverse, then to Park, and repeated each move several times – no change, the warning horn still remained on. Inspection of the dash revealed there were no dash warning lights illuminated. I moved the truck out to a ‘clear, flat & open’ area of the parking lot, and tried these and additional efforts again. Adding such things as; radio off, front & rear proximity sensor switches off, parking brake on/off, AC off, transmission in Park, turning engine off (horn still on) only when I opened the door did the horn silence. However, when I closed the door and restarted the engine, the warning horn (without any sensor lights displayed) came on again. Every attempt to silence the horn failed and the horn stayed on for well over 20 minutes as I drove home, contacted the dealership, and performed troubleshooting techniques suggested by 'John', who could hear the horn blaring over the phone. Troubleshooting was basicly; inspect each sensor for mud and/or bug guts. There was very mild road grime/dust on the rear sensors, no mud or guts on the front. I cycled the power again, the horn was still blaring when I restarted the engine. The fifth time I shut the engine off, and restarted it, the horn cleared. I drove over to my apartment dempster and activated the proximity sensors again. I could not duplicate the fault condition with the warning horn locked on. It was decided by 'John', it would be non-productive to bring the vehicle in, since the proximity sensors were no longer malfunctioning. I am also having other ‘proximity sensor issues’, like picking up vehicles not in my lane on the highway which is affecting the ACC function and following distance. Also alarms for dips, curbs and weeds occur at weird times but not every time for the same obstacle. Those issues had not been there originally (August 2020 to Jan 2021), and now they seem to be getting worse. The original issues were not addressed on the July 25th service ticket, even though I spoke to the service writer, and proximity sensor issues were on the list of issues emailed him.
