Vehicle & Technical > Discovery

ABS Works, but making funny sound

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Charlie716:
The reason for the constant draw is that the ABS never gets switched off, this is because if you had a the vehicle rolling with the engine off the system would still work, it's a safety feature.

The draw is so small, it has no real impact on the Battery unless for significant periods unused.

thermidorthelobster:
I've not noticed this on my TD5.  Daft question probably, but are you sure it's the ABS and not the SLABS?

Evilgoat:

--- Quote from: "Charlie716" ---The reason for the constant draw is that the ABS never gets switched off, this is because if you had a the vehicle rolling with the engine off the system would still work, it's a safety feature.

The draw is so small, it has no real impact on the Battery unless for significant periods unused.
--- End quote ---


I was about to comment then I stopped and realised the age of the kit in question.

Most ABS ECUs I've come accross do go off with the engine although I seem to remeber a conversation about some of the Jap systems staying active untill the wheels are stationary. I know the Audis is certainly off with the engine power, the ratinale being yes, the engine may die but you arent going to actually turn the key to the off position untill you arent at risk of becoming cannon fodder in the middle of the M25*

I would be interested in knowing what a main stealer would have to say about this though, the ABS shouldnt be doing anything at rest and ticking suggests that relays/modulators are doing something.

*possibly a bad example as that would imply you were moving to start off.

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