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944 Turbo s

911SSC

911SSC

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Hi Guys

Im new to the 944 game but have a 911 supersport in the garage , when i first start up after about a 30 secs or a so you hear what sounds like a motor whirl around the drivers door / under the dash area for a few seconds and then the big red light with the exclamation mark comes on , if i turn it off and then back on NO whirl of a motor and the light stays off.

Any ideas ??

Regards

Ian
 
ABS pump is cycling to test. This is normal. If there is a fault the main warning lamp will illuminate as well as the antilock lamp.

 
HI

Thank you that makes sense as the antilock lamp comes on as well .Just started it again the whirl was there but the light stayed out so i guess some intermittent fault.

Any ideas ?

regards

Ian

 
ABS relay, is the starting point then the ABS Motor earth

Due to the location of the pump they are very prone to corrosion, its behind the OS plastic arch liner in the wing well a real pita to get at

 
Does this happen agter you start moving? That is when it should cycle. If so it could equally be a sensor. As with most things I things I think there is a good guide at [link=http://www.clarks-garage.com]www.clarks-garage.com[/link]

 
Hi

Thanks for the answers, ill have to check all the points mentioned. I am having a rear wheel bearing done today and the guy said it could be that... i have my doubts but i'll now later

Cheers all

 
I've replaced the pump on both my cars.

It should self test at 5mph, if everything is well you don't get a light on the dash. If it is doing it when stationary then you're in luck and it may well be a sensor fault. I used to have a guid I found on Rennlist (I think) of what pins to multimeter on the ABS plug to check the sensors. I'd go there first as it is the easiest/cheapest potential fix, then the replay and then the pump.

 
[link=https://www.porscheclubgb.com/forum/FindPost/876786]https://www.porscheclubgb.om/forum/FindPost/876786[/link]

 
Hi

I hadn't answered as i thought i would see what happened after the bearing was change so far the light hasn't come on so either the fitter was correct in saying he has known them too come on when the bearing goes and says out when changed or just a coincidence but it has stayed off ever since it was changed

Regards

Ian

 
If the wheel bearing is allowed to severely fail, the central hub will stop running true and the air gap between the ring and the sensor increases, making a weaker signal, but that will only cause it to fail the 5mph self test.

 
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