I have a 1986 E30 325e, stock. It has been non-op for 5 years and I'm getting it rolling again. The ABS system and dash light worked fine for a long time but not long before being parked, the light started to occasionally gone on briefly then off again. Can not confirm if the actual ABS braking worked.
Currently, the ABS dash light goes on when the key is in the on and start postions and remains on after the car starts and moves.
What's been tried so far without success:
1) Inspected and cleaned all four wheel sensors
2) Cleaned the sensor rings
3) Visually inspected sensor wiring from sensor to where it enters body
3) Inspected the over-voltage relay, the silver metal cube above the ECU, fuse wire inside was intact, tested continuity with meter
4) checked fuse in main fuse box
5) removed, inspected, and reseated relays in the ECU fuse box, no electrical testing
From reading, it seems this issue is a ECU system fault and not a sensor related issue.
What's next?
1) I can check power to ECU
2) Is there further testing or taking measurement before swapping parts?
3) Seems like there isn't much more to probe as it all feeds into the ECU that controls the dash light.
Currently, the ABS dash light goes on when the key is in the on and start postions and remains on after the car starts and moves.
What's been tried so far without success:
1) Inspected and cleaned all four wheel sensors
2) Cleaned the sensor rings
3) Visually inspected sensor wiring from sensor to where it enters body
3) Inspected the over-voltage relay, the silver metal cube above the ECU, fuse wire inside was intact, tested continuity with meter
4) checked fuse in main fuse box
5) removed, inspected, and reseated relays in the ECU fuse box, no electrical testing
From reading, it seems this issue is a ECU system fault and not a sensor related issue.
What's next?
1) I can check power to ECU
2) Is there further testing or taking measurement before swapping parts?
3) Seems like there isn't much more to probe as it all feeds into the ECU that controls the dash light.
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