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Need clarification Posted by Ari [Email]  (#2847) [Profile/Gallery]
(more from Ari) on Mon, 3 Dec 2007 06:11:38
In Reply to: It's snowing and freakin cold in Tahoe, Waveman, Sat, 1 Dec 2007 15:48:34 Members do not see ads below this line. - Help Keep This Site Online - Signup |
First, I assume you have ACC in your car - automatic climate control, not manual knobs.
Second - some clarification on what you're seeing. Under the panel at the base of the windshield, in the engine compartment. There is a rod that comes out horizontally from the heater/blower box that has an arm on it sticking up. Attached to the top of the arm is a stiff wire that goes back through a hole in the firewall. You SHOULD NOT be able to move the wire - it is attached to the arm of an electric servo inside the dash, and that arm won't move - only the servo can move it. As the ACC controls the heat, the servo moves the wire that moves the arm that turns the rod.
If you do have the ACC, the very first thing to do is to reset it. Push the AUTO and VENT buttons at the same time. The unit should start flashing 88 on the display, and will run through a program to move everything around. When it is finished, it will display a number showing the number of fault codes present. 0 means no codes. Press any button or AUTO to exit the diagnostic mode. If you see a number other than 0, press the VENT button button to display the codes one by one. Write them down.
Quite often all it takes is going through the self-test/self-calibration to set things right. Or it'll give you some faults. It isn't a perfect self- test; for example, it tells you if a servo doesn't move. But if the arm has fallen off the servo or the arm has broken off the rod, it doesn't tell you that the heater flap isn't moving - just if the servo moves.
A common problem is for the arm to break off the rod. If that is what happened, yes, you can turn the rod manually with a vice grips and hold it in place until it's repaired. Saab sells a kit (heater arm repair kit, really!) that splints the arm.
However, if the arm is still attached to the rod DON'T BREAK IT OFF! If the servo isn't moving, just slip the wire off the arm, rotate it to the right place, and worry about fixing the servo later.
If there is no wire - it fell off, you should be able to move the arm/rod.
So - run the self test. But also need some clarification on what is and isn't still attached.
posted by 192.249....
, Mon, 3 Dec 2007 06:11:38 <-- Viewing This Message
, Sat, 1 Dec 2007 21:40:49
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