Thread: Descent control question

Its perfectly normal.

HDC (hill decent) uses the ABS modulator to "brake" the vehicle on and off whilst descending. What your hearing is ABS pump / modulator "doing its thing"

I'd have to agree with urban panzer the hill decent on our 2000 d2 is quiet noisy, coming from the abs modulator doing it's thing. I'm not surprised though it's a small motor working hard to pump fluid to the wheels it wants to slow down, works great and I don't always use it.

Hmm, hope its normal. Just dont remember it happening on the last Disco. I remember the clicking but not the cluncking type noise.

Originally Posted by Mudguard

Hmm, hope its normal. Just dont remember it happening on the last Disco. I remember the clicking but not the cluncking type noise.

Yep, it'll clunk alright!
I remember when I first used mine....I sh@t myself and turned it off!!
If your last one wasn't clunking but just clicking, it probably wasn't working properly!!

All as previous posts. If your last Disco clicked, I would say it had a problem.

Mine can sound like a hammer drill when working hard!

cheers

Cool, makes me feel better.

Originally Posted by Mudguard

Hmm, hope its normal. Just dont remember it happening on the last Disco. I remember the clicking but not the cluncking type noise.

The clunking could be the pads grabbing and letting go again?

But, HDC is a noisy contraption.

When it sounds like it's fallen off and going under the wheels it's fine. It's only when the 3 lights come on and it stops you need worry.