ACC question - Saab 9000 Bulletin Board - Saabnet.com
NG900 & OG93 |
Vintage Models |
Clubs & SOC |
Other Cars |
Member Photo Galleries |
Member Directory |
*Buddy Registry |
*Mileage Registry |
What's New |
Photo of the Month |
[Main 9000 Bulletin Board | Post Followup | BBFAQ ]
[ Prev by Date ] [ Next by Date ] Member Login / Signup [Latest Member Gallery Photos]
Posted by skibumm100 [Email] (more from skibumm100) on Sat, 17 Feb 2018 07:07:28
When a late model (1996-97) 9000 is started during cold weather and the ACC is in "Auto" mode, the fan runs at some minimum speed until the engine warms up and then the fan speed increases to achieve the temp setting programmed. How does the ACC know the engine is warmed up and it's OK to speed up the blower fan? I assume it's a coolant temp sensor signal, possibly sent from the ECU, but I'm not sure. I can't remember if there's more than one coolant temp sensor. The only other possibility would be an air temp sensor somewhere in the HVAC ductwork. All of the 9000's I've had have worked this way except my 1996 model. It cranks the fan up to full speed right from the beginning and blows ice cold until the engine eventually warms up. I have it programmed to come up in manual but that requires button pushing to get things the way I want once the engine warms up. Kind of defeats automatic climate control. The system also does not recognize when it should automatically turn on the defrosters. Doesn't matter how cold it is outside, I have to turn them on manually. I have swapped out the ACC with a known good one, same results. TIA.
posted by 165.225.34...
Posts in this Thread:
- ACC question, skibumm100, Sat, 17 Feb 2018 07:07:28 <-- Viewing This Message
- Re: ACC question, sam96CS , Mon, 19 Feb 2018 20:35:15
- I dunno. My '96 works as you describe...., Noel , Sat, 17 Feb 2018 11:03:13
- Re: blower, Simon S, Sat, 17 Feb 2018 10:02:35
- Re: ACC question, Simon S, Sat, 17 Feb 2018 10:00:30
Post a Followup
No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.
This is a moderated bulletin board - Posting is a privilege, not a right.
Unsolicited commercial postings are not allowed (no spam). Please, no For Sale or Wanted postings, SERIOUSLY.
Classifieds are to be listed in The Saab Network Classifieds pages.
This is a problem solving forum for over 250,000 Saab owners, so expect to see
problems discussed here even though our cars are generally very reliable. This is not an anything goes
type of forum. Saabnet.com has been a moderated forum since 1988. For usage guidelines, see the
Saabnet.com Mission and Purpose Page. Please remember that you are
not anonymous. Site Contact | Site Donations | Other Sites by SP -
Your address is: 220.127.116.11 - Using CCBot/2.0 (https://commoncrawl.org/faq/) - Logged.
Site Members do not see red text instructions, bottom of the page anchor ads, or box ads.
Click here to see all
the Site Membership Benefits!