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ehcsrop

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Posts posted by ehcsrop

    ABS lamp do I need a Bosch Hammer to reset

    in 964 Series

    Posted

    Hi all

    I am an ex main dealer Porsche tech (don't hang me for that), I mainly worked on 997, 996, Cayenne, Boxster, not much older stuff. I have been looking at a C4 964 for a mate. His ABS lamp, caution lamp and (excuse my ignorance) looks like a 4wd lamp? They were flashing on over bumps etc. I stripped out the front ABS sensors and cleaned them up, tested the sensors they are putting out ac volts. I checked continuity of the wiring looms for the front sensors up to the inside of the wings. I cleaned up the earth connections at the sensor and on the inner wings. I checked the ABS brain plug for seating along with the ABS relays all 3. The brake fluid level is OK. I refitted everything and now the lights are on constantly? I was doing an oil change too so had the front of the car jacked way up high and running the engine to warm it up prior to emptying the oil tank. If I have unplugged the sensors with the engine running would that cause the warning lamp to remain on? On this system do the faults have to be cleared with a Bosch Hammer etc or does the fault memory automatically self clear (volatile or non-volatile)? I tried disconnecting the earth from the battery for a few minutes already.

    Any help greatly appreciated. I may be able to help you guys with the newer stuff !!

    Many thanks

    Hi If you drive the car it should put the light out if all is ok!

    What faults would cause the lamps to stay on right from start up?

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