2000 Saab 93 Mechanics Advice Needed
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- Опубликовано: 30 апр 2024
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I own a 2000 93 convertible since new. 57,000 miles. Was wife’s car before it became a hobby car. The 2 speed fan works through 2 relays. One relay circuit feeds through a resistor which often fails with age and one feeds full 12 volts to the same fan when the engines needs more added cooling. The fastest speed comes on only when needed. The AC normally runs the low speed fan. The temp gauge doesn’t necessary show overheating. I would check the relays first. Even the low speed fan does not always need to run depending on temperature. A relay could be sticking.
Check the radiator fans relay unit (located on top of the radiator fan cover). Sometimes the relays stick inside and causes power to go to the fan constantly instead of turning off when the key is off.
Dont know anything about the model but by experience.
Fan relay
Coolant temp sensor
Or if ot uses a fan ecu
The 2 fan relays actually are in the fuse panel under the hood drivers side. Does the low speed fan setting come on as needed without the AC? It should cycle. You can swap the 2 relays also to confirm if it is the high temp fan relay sticking. I meant to mention that the gauge temp sensor on that car is separate to the coolant sensor used for fan activation.
Difficult to say from the description but the no start condition could be something else entirely like you suggested. On all of the SAABs I've had (a couple of dozen) it's totally normal for the fans to kick on after the car has been shut down as a safeguard for the turbocharger and to help mitigate heat soak. Going to the most obvious thing first, are you certain that the battery is healthy? Can you check for a system electrical drain when the car is sitting?
Nice Saab!🤩
Jon, I love you, and God bless you, this is the exact car I imagined you driving...😅
It's my son's. :)
IIRC the fan control on the OG9-3 is controlled via the DICE unit, then 3 relays (depending upon if AC is on, whether the car is overheating, etc). I'd start with the relay, that's the most likely cause. The fan coming on (and then staying on for a minute or two after you turn the car off) is completely normal for Saabs, especially with Automatic Climate Control (he'll have the electronic climate panel instead of the physical knobs). If the relay does nothing, try the temp sensor, they're cheap and easy to change and an incorrect value can make the DICE engage the fans to stop an overheating situation.
Depending on if his 2000 is technically a leftover 1999 build, it'll have 2 temp sensors... One on the intake manifold that gives your ECU the temp, and one on the side of the head that controls the fan and gauge cluster. If his doesn't have two, then it'll just have the one by the thermostat housing
Thanks. :)
@@AllCarswithJon Please update us when you find the fix!
Sounds like a bad radiator fan relay. There is a low speed fan relay and a high speed fan relay on that model. They are labeled D and I respectively. Yank them both, and take it to somewhere like Autozone and have them match them. They should be a standard 4 blade relay and should only be around $10/piece.
I had a 93 aero that had all sorts of issues and every issue I had, the answer was to change the ecu... however, the ecu and each car is 'married' ... so you can't just get another ecu and swap it out... you have to get another ecu and a Tech 2 computer with SAAB chip and deep dive into the ecu and convince it that the ecu belongs in the car. There is alot of info on line about it. I was told I would have to send the ecu to the US from Australia to have it sorted, so they could clone it and send me another one back... that works... maybe. Saab cars are absolutely AWESOME to drive... but the stand alone, totally dependant computer system makes them a 'Geeks only' car to have any success with them. When they work, they are fantastic... when they don't... they are an expensive nightmare. Greetings from Down Under
Sounds like my Volvo problem too. Thanks for the comment!
A lot of people who have no idea what they’re doing will blame the ECU. On SAABs it does happen but it’s rarely the ECU and almost always something else they don’t know how to diagnose or fix.
I was really wishing that it would be something what I know owning the 2004 Saab 95 2.0t Wagon. Sounds like a sensor problem. By the way these cars have three critical areas what fail way more than others so keep these in mind. Crank position sensor, fuel pump and most importantly the DIC = Direct ignition cassette on top of the engine. I hope even my little humble answer helps.
Thanks for the feedback!
On my 2000 9-3 the fans would always run after shutting the car down on hot days to cool off the engine. Pretty sure that’s a feature of the car but it certainly shouldn’t run so long as to kill the battery 🤔
Jon got that nice house in the nice older development 80s/90s old money vibe going. I'd imagine he's got at least a million in the 401
Sorry to be the bearer of bad news but Saabs are REALLY difficult to get parts for and they were so quirky and unique that most mechanics don't know shit about them, unless they're older and specialized/or worked on a lot of them back in the day. I'd sell it before something major goes wrong. If you're cool with dumping money into it, keep it.
Not my car, it's my sons. He has two friends who are Saab fans and have a ton of experience with the cars, so at least he has a bit of support there.
But he loves his Saab. One day he'll get tired of it I'm sure. :)
Parts are not that difficult to find, especially for his son's model. Anyone who's impatient or lazy shouldn't own these cars to begin with. The national chains aren't going to have many parts but there's a huge network of SAAB owners, Ebay, junkyards and esaabparts.
Not a Saab mechanic, but sounds more like a faulty relay to me.
Jon, I know nothing about a Saab. But I have an idea, just put a switch on the fan.
Wire in a manual off switch....
cool idea, then we get to see this car featured on Just Rolled In some time in the future ... "Customer states, 'another shop' installed ...."
Just another Saab story. Sorry!
ugh... :)
Take the car to Pick-N-Pull. Get your $300 and be done with it.🙂