00779 - Outside Air Temperature Sensor (G17): Open or Short to Plus
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From: Greater Sacramento
00779 - Outside Air Temperature Sensor (G17): Open or Short to Plus
My outside air temperature sensor stopped working after working around the lower dash area. Readings are completely random or the cluster display is completely blank in the temperature (middle section). Does anybody know where the wiring for the air temperature sensor is under the lower dash? I'm thinking I may have accidently disconnected/forgot to disconnect a wire...
Thanks
Thanks
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It has to be integrated into one of the 3 ...>>>
Multiconnector plugs. All signals into the cluster are through them. Several large harnesses that I doubt you could have damaged. Maybe you bent a pin upon reinstall? I'd pull the plugs, inspect and re-install..
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Really?.......>>
Odd....Maybe a break in a wire in one of the harnesses....That would be about impossible to find unfortunately...
Have you checked the ambient sensor up in the grill? Check that and the plug. Some guys have occasionally found them missing with the wires dangling....:-)
Have you checked the ambient sensor up in the grill? Check that and the plug. Some guys have occasionally found them missing with the wires dangling....:-)
Thread Starter
AudiWorld Member
Joined: Nov 2007
Posts: 518
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From: Greater Sacramento
I haven't - I'll check it tomorrow. No idea why that would have disconnected...
I disconnected the battery one day, tore into the lower dash segments, ran some power wiring to the rear of the car and put it all back together.
Who knows though, a gremlin probably did it.
Who knows though, a gremlin probably did it.
Thread Starter
AudiWorld Member
Joined: Nov 2007
Posts: 518
Likes: 4
From: Greater Sacramento
Hmm... looking at the Bentley wiring diagrams and it looks like it connects through...
<center><img src="http://i267.photobucket.com/albums/ii295/TTeuer/G17-E87.jpg"></center><p>the AC H/U as well? I did disconnect that unit. Would it make sense to take that out and check all of the connections?
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Thread Starter
AudiWorld Member
Joined: Nov 2007
Posts: 518
Likes: 4
From: Greater Sacramento
Checked the wires up front and behind the AC Control Unit (E87)...
Didn't find anything wrong. I guess I'll have to lower the dash and see if I somehow screwed up a connection up under the cluster area...
Is it possible that the sensor just went bad?
Is it possible that the sensor just went bad?