Does anyone else have issues with the EXT temp responding "--"? I know this seems minor compared to all of the other posts, but if it's not expensive (< $40 or so) I want to fix it. It's just one of those things that bugs me.
It looks like the RAVE manual suggests that EXT responding "--" relates to an open circuit, and that it is related to the Ambient Temperature Sensor. I can't find one of these on-line, but I'm also not sure that it isn't just a fuse or loose wire/connection.

It would also be very helpful to know if this could cause any other issues other then just not knowing what temperature it has to be outside for my blinkers not to work?

 

Seriously nothing?

 

Figured I'd give this question one more shot. Then I'll let it die the slow painful death it probably deserves.

 

Sorry bud, haven't had that problem on mine. (yet)

 

There is a self test for the HVAC controls on a DII, it tells you how in the RAVE manual, I dont know where in the RAVE you will have to look for it.

It could be a blown fuse, it could be a severed wire to the temp probe or the temp probe is just bust.
If so you can replace it.

There is a little probe behind the grill, make sure it is still plugged in and then follow the wires as far back as you can, I am betting on a bad probe or severed wire.
You can splice the wire and replace the probe, it is make by Gentex.
www.gentex.com
Magna Donnelly made the DI mirrors and Gentex made the DII mirrors.

 

A manual diagnostic check includes a check of the sunlight sensor, and is initiated by pressing and holding the AUTO switch and the air distribution switch, then turning the ignition switch from off to on. The audible warning sounds once and the indications on the control panel display illuminate. FC is shown in the LH temperature window and the results of the check are shown as a two digit fault code in the RH temperature window. If a fault is detected, the audible warning sounds three times and the AUTO window on the display flashes on and off for 20 seconds. If more than one
fault is detected, the fault codes cycle in numerical order, at 1 Hz. The audible warning sounds as each fault code is shown. In low light conditions, to avoid false sunlight sensor fault indications, the sunlight sensor should be illuminated with a strong light source.

Edit: RAVE section 82-21 Air conditioning/Description and operation/Operation
Code: 12 Ambient temperature sensor
Fault:Open or short circuit
Default value:10C (50F) Cooling fan permanently on
Display shows "- -" if external air temperature selected

 

You actually waited 6 months for someone to hand feed you the answer? Download the Rave CD and do some reading, spread those wings and fly. This one should be easy as Spike suggested.

Edit: well I guess good thing comes to those who wait.