Discussion
Apache said:
I keep getting an intermittent ACS warning light come on but ABS always seems fine....anyone got any suggestions of where to look?
Perfectly normal behaviour on wet and slippery roads, mind you they are a bit too sensitive on BMWs for my liking, it's just letting you know that it's working...Salom said:
Apache said:
I keep getting an intermittent ACS warning light come on but ABS always seems fine....anyone got any suggestions of where to look?
Perfectly normal behaviour on wet and slippery roads, mind you they are a bit too sensitive on BMWs for my liking, it's just letting you know that it's working...It could be a wheel speed sensor misreading (No.7: http://www.realoem.com/bmw/showparts.do?model=BG12... )
(Usually brings up both the ASC & ABS lights on the dash but not always).
Worst case scenario is that the control module has gone faulty and needs replacing (it is a known problem!)
My ASC has been playing up for a couple of months, activating when the car's stationary, at parking speeds, switching the ASC & ABS lights on and off randomly while driving along (both at the same time on mine), causing an electrical buzzing noise from the control module behind the glovebox whilst driving along, all of which I suspect is due to the ASC control module having some sort of fault.
Took the car to BMW, no faults recorded, all sensors reading correctly, control unit operating correctly and didn't play up once in all the time they had the car.
The following day on the way to work: ASC & ABS lights came on out the blue.
They were still on after work so I went straight to BMW and just as I was parking up, they went out!
Strangely however, it appears to have fixed itself for the time being!
(Just more evidence to prove that My car is definitely female!
)
(Usually brings up both the ASC & ABS lights on the dash but not always).
Worst case scenario is that the control module has gone faulty and needs replacing (it is a known problem!)
My ASC has been playing up for a couple of months, activating when the car's stationary, at parking speeds, switching the ASC & ABS lights on and off randomly while driving along (both at the same time on mine), causing an electrical buzzing noise from the control module behind the glovebox whilst driving along, all of which I suspect is due to the ASC control module having some sort of fault.
Took the car to BMW, no faults recorded, all sensors reading correctly, control unit operating correctly and didn't play up once in all the time they had the car.
The following day on the way to work: ASC & ABS lights came on out the blue.
They were still on after work so I went straight to BMW and just as I was parking up, they went out!
Strangely however, it appears to have fixed itself for the time being!
(Just more evidence to prove that My car is definitely female!
)Apache said:
I'd have thought a sensor would give an ABS and an ASC light. I get no ABS or buzzing or anything
A failed sensor usually does bring up both ABS & ASC lights on the dash but it can bring up just the ASC light (rare, but possible).If the ASC light is on permanently then it should throw up a fault code (no guarantee though, as I say, My ASC has played up and showed no codes at all but that was an intermittent fault).
I think the buzzing noise that I get is merely to do with the issue My car seems to have/had, I don't think it's a standard symptom, but again, as I have previously posted, the control modules are known to go faulty.
(BTW, is there definitely a working bulb in the ABS warning lamp on the dashboard? I only ask because some unscrupulous owners have been known to remove the bulb when the ABS has played up in order to get past the MOT test).
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