Question about 1991 Porsche 944

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I have problems with the ABS system on my 1990 Porsche 944S2. The ABS lamp goes out when thw engine is started, but as soon as the car rolls, the warning light comes on. How do I locate the fault?

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My 1990 944 Turbo has the same symptom. Porsche checked the ABS system using the link to the onboard computer - They identified the right rear sensor - I changed that and it still failed. Turns out it is probably the ABS pump right rear actuator. If I take off fast in a straight line I can prevent the ABS from failing.

Posted on Jan 11, 2010

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Suspect abs fault. to check this use a multi-meter on voltage ac because the sesnors generates alternating current jack the vehicle up locate the sensor wires spin the wheel and see if you get voltage, do this to all four wheels. the one with no voltage is faulty. Or you can can the resistance in the winding. no resistance open circuit. hope this helps

Posted on Aug 19, 2009

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The ABS sensors need replaced. they are located at each wheel

Posted on Jun 28, 2009

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Meaning of ABS light


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Check with Porsche service (your closest dealer) for recalls or TSB (Technical Service Bulletins) related to your concern and check the cayman/boxster owners clubs for similar posts and resolutions.

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Get a wiring diagram and check for good grounds at the appropriate locations for a 1990 SAAB; also check for possible shorting out of the ignition switch under fault conditions.

The best source of info on this car is the "Bentley Bible" aka the Saab 900 Official Service Manual, costs about $40 from Amazon!

16 valve manual: http://www.amazon.com/Saab-900-Valve-Service-Manual/dp/0837603137

8 valve manual :http://www.amazon.com/Eight-Official-Service-Manual-1981-1988/dp/0837603102

The ABS system is complex, and best worked on by a trained and trusted professional.

Hope this points you in the right direction!

Saabreur

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