Re: P0686, P0687, intermittent A/C - Saab 9-3SS Bulletin Board - Saabnet.com
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[This morning I made a point of setting "NO-AC" for my commute. While the CEL did eventually come on, it took 25 minutes instead of the usual 2 minutes]
That's a good piece of diagnostic sleuthing. It kind of point toward an overload of circuitry bringing down the voltage enough to make the ECM "think" the relay is not on. In computer lingo they call it life sustaining voltage or a brown out.
I have replaced a few cooling fans due to that they go bad either stops running or getting noisy and it would not be a long shot that as they get older nearing the end, they would start to draw more and more amperage overloading the circuits, and it could create something like this.
Anders
SWEDECAR
Posts in this Thread:
- P0686, P0687, intermittent A/C, TML , Wed, 13 Jun 2018 05:47:541
- Re: P0686, P0687, intermittent A/C, SWEDECAR , Wed, 13 Jun 2018 09:40:05
- Re: P0686, P0687, intermittent A/C, TML , Thu, 14 Jun 2018 04:10:41
- Re: P0686, P0687, intermittent A/C, SWEDECAR , Thu, 14 Jun 2018 10:06:40 <-- Viewing This Message
- Re: P0686, P0687, intermittent A/C, TML , Thu, 14 Jun 2018 13:40:12
- Re: P0686, P0687, intermittent A/C, SWEDECAR , Thu, 14 Jun 2018 14:25:34
- Re: P0686, P0687, intermittent A/C, TML , Wed, 27 Jun 2018 07:17:03
- Re: P0686, P0687, intermittent A/C, SWEDECAR , Wed, 27 Jun 2018 10:25:01
- Re: P0686, P0687, intermittent A/C, Stefan, Sun, 1 Jul 2018 02:02:43
- Re: P0686, P0687, intermittent A/C, TML , Sat, 30 Jun 2018 17:41:53
- Re: P0686, P0687, intermittent A/C, Bernie , Fri, 15 Jun 2018 20:14:03
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