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YOUR RESEARCHABS issue at race car - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Leading reported evidence
Disconnect we got rear wheel lock -up
Performed · outcome unconfirmed
No successful repair reported for this finding.
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Performed · outcome unconfirmed · Original poster
When the wheel sensor was disconnected we got rear wheel lock -up but no light.
ABS issue at race car - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Leading evidence: 'Disconnect we got rear wheel lock -up' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Disconnect we got rear wheel lock -up' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Test with and without one wheel sensor (left rear) connected
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No successful repair reported for this finding.
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Performed · outcome unconfirmed · Original poster
I have tested both with and without one wheel sensor (left rear) connected but I can't get the light to get active.
ABS issue at race car - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Disconnect wheel speed sensor
Suggestion or failed attempt
No successful repair reported for this finding.
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Suggestion · Original poster
Is it even a valid test to disconnect a wheel speed sensor?
ABS issue at race car - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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7 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
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I have an endurance race car with ABS from a 2000 Boxter (the race car is a 924/944). The ABS is stand alone and not connected to the anything else then the sensors, battery and ground. At the latest race we got a few lock-ups so my plan is to connect the MIL-light for the ABS but I'm not sure how that is supposed to work. My hope was to get some support from the experts here
Is the MIL active high or active low? I have tested both with and without one wheel sensor (left rear) connected but I can't get the light to get active. When the wheel sensor was disconnected we got rear wheel lock -up but no light.
Does the MIL need something else to work? Is it even a valid test to disconnect a wheel speed sensor?
It's not the best feeling to not know if the ABS works at the end of a long straight...
If more information is needed to be able to help, just let mee know.
Thanks in advance!
I'm not sure this is the right place to ask this type of question, so please feel free to move it to a better place.
pm me and i can email you wiring diagrams from shop manual if that helps (but 22 MB ...). you should also confirm part # on your abs pump as they differ depending on options - psm, e-diff, etc.
porsche stabilty management. here's a link to the PET with the various abs pumps available ...
https://www.********************************************.c om/porsche-parts/hardparts.php?dir=986-97-04§ion=605-00
>>> replace the **** with auto atlanta (one word) and fix 'com'
This is little strange, the P/N list at the link below does nor include the pump I have. Can it be different numbers in US and EU? MIne is from EU.
The number marked at the pump is 98635575500 and it is a 5.3 model
For model years 97 - 00 it lists the warning light at pin 21
Same for model years 01 - 02 but it mentions 'not used'. I guess it would still operate though.
This is a source reference. Confirm exact model applicability in the original material.
