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Weird ECU glitch
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=88&t=29042		 Page 1 of 1
Author:  toy4everyseason [ Tue Jan 29, 2008 10:56 pm ]
Post subject:  Weird ECU glitch
This cold afternoon I noticed something weird on my Jeep. I had no instrument panel warning lights, my seatbelt light was the only one on(my seat belt was on). My transmission selection panel showed I was in park but yet I was driving down the street. When I turned off the Jeep the instrument panel stayed on. Not wanting to come out to a dead battery I disconnected the negative battery terminal. I hooked up the battery and the problem is gone..... odd. What really sucks is I have a dealership with a small service department so it will have to wait 2 weeks till it can be looked at. :x
Author:  Diggerfreek [ Wed Jan 30, 2008 12:09 am ]
Post subject: 
I just posted you problem on a nitro forum so we will see what they come up with
Author:  Diggerfreek [ Wed Jan 30, 2008 7:14 pm ]
Post subject: 
so far this is all

Single word .Yes . Computer glitch .Disconnect an reboot with re-connect did the trick. just my .02 worth
Roadie
Author:  toy4everyseason [ Wed Jan 30, 2008 8:06 pm ]
Post subject: 
thats what I thought. I just wanted to let other owners know about it so they reset thier ECU before it drains the battery.
Author:  KK [ Thu Jan 31, 2008 5:10 pm ]
Post subject:  That's odd for sure
I've not experienced that and hope it doesn't happen to me. Sorry 'bout your luck and thanks for tip about re-settting ECU if it does occur.
Author:  John91C [ Thu Jan 31, 2008 6:44 pm ]
Post subject: 
I didn't have any problems with the ECU like you did but last night when I was in a mini-snow storm my back-up sensors stopped working and on the EVIC it showed Rear sensor malfunction contact dealer or something to that effect. I saw a light coat of snow on the rear bumpers covering the sensors. I'm thinking the sensors weren't working with the snow. After the snow melted off the bumper the sensors worked perfectly. Anyone else have this problem?
Author:  Diggerfreek [ Thu Jan 31, 2008 7:50 pm ]
Post subject: 
must be a problem with ice...made the car think the sensor was bad because of the signal
Author:  toy4everyseason [ Thu Jan 31, 2008 11:46 pm ]
Post subject: 
yep those sensor work like radar guns. They send out some sound wave and they calculate the distance by how long it takes for the sound to come back. If there is ice, the sound wave is disrupted and it reads as a bad signal. Next time just knock off the snow or ice and you'll be good to go.
Author:  Limitedguy [ Fri Feb 01, 2008 3:10 pm ]
Post subject: 
They work on the Ultrasonic principle, as toy4everyseason stated. A sound wave pings off the object that is being detected. The technology has been around a long time. It was used in Motion detectors for security systems in the 70's, until it was determined to be too unstable. They constantly false alarmed and thats when infrared technology became the standard. http://f2.pg.briefcase.yahoo.com/bc/trdstr2000@sbcglobal.net/lst?.dir=/Mopar+Park+Sense&.scrumb=qJ4KV7CcPKj that link has an explanation of it.
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