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Old 06-15-2018, 11:16 AM   #1
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ABS unit Error codes and ABS unit question

Hi,

My 1999 9-3 is showing error lights on my dashboard. The following lights are on:
- ABS Light
- Brake Light
- Emergency Light (exclamation point)


I am still diagnosing the exact problem but I assume I need a new ABS unit. Any insight on this issue?


Also, how can I tell what model ABS unit that is currently in the car? Any way to check by VIN? I'm trying to not remove the ABS unit.


Thanks!
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Old 06-15-2018, 01:01 PM   #2
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You don't need to remove the whole thing, you only need to remove the black plastic control box with the 4 torx screws that are visible, and it will slide out. It's got a contact ribbon card on it like a Nintendo cartridge, and that black plastic part will have the P/N.

IIRC the difference between them that matters to you is whether or not the car has stability control or not, which unless your car is a Viggen it's extremely unlikely that it would.

You don't need to remove the whole brake ABS pump and valve block with the brake lines attached, and when you remove the electrical module the car is still drivable.
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Old 06-15-2018, 05:15 PM   #3
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Don't assume that it's the ABS computer. It could be a bad wheel sensor as well (or sensor connector). If you can find someone with a Tech II to scan it, that will likely tell you exactly what's wrong.
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Old 06-22-2018, 11:07 AM   #4
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From past experience on my 2000 9-5 aero this is the ABS control unit. When it goes bad you have the Christmas tree and you loose your speedometer. Easy fix (6 torx screw) well documented on YouTube. I got a spare one with the same number at the junkyard (works but need to be paired with the car to get the traction control working) and sent mine to be rebuilt as I don’t know how long the used one will work. The rebuild one won’t need to paired as it come from my car. Cheap ABS inc in Kansas for $110.
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