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Author Topic: rear disc brakes not working mk3 16v gti with ABS  (Read 1408 times)

Offline jmorris

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rear disc brakes not working mk3 16v gti with ABS
« on: 06 February 2011, 17:20 »
Hi guys, i have a problem with my mk3. My rear brakes arent working. if i crack the bleed nipple with my foot on the brakes no fluid comes out. the front brakes work fine. i have checked for blockages but there isnt any.
Any ideas?
thanks in advance
jake
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Offline Mike87Turbo

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Re: rear disc brakes not working mk3 16v gti with ABS
« Reply #1 on: 06 February 2011, 18:05 »
It could be that the nipples themselves are blocked. And the lack of rear brakes could be caliper pistons/sliders/pads sticking. Try stripping the lot down and seeing if anythings stuck.
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Offline jmorris

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Re: rear disc brakes not working mk3 16v gti with ABS
« Reply #2 on: 06 February 2011, 18:34 »
ive stripped it all down and it all seems ok, i can get fluid out whilst running the abs bleeding sequence with vagcom but cannot get a drop out of it otherwise
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Offline AudiA8Quattro

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Re: rear disc brakes not working mk3 16v gti with ABS
« Reply #3 on: 06 February 2011, 20:56 »
ABS pump is f**ked?
Did you get any fault codes?
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Offline jmorris

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Re: rear disc brakes not working mk3 16v gti with ABS
« Reply #4 on: 06 February 2011, 21:20 »
only fault code is speed sensor, When  was using vcds  i could only get fluid out when the pump wasnt running (when i had to depress the pedal) what are the symptoms of a dodgy pump? the front brakes work fine :undecided:
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Offline AudiA8Quattro

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Re: rear disc brakes not working mk3 16v gti with ABS
« Reply #5 on: 06 February 2011, 22:13 »
If the fluid only comes out the rears with the pump not running, then that would suggest that is the problem..
You could also try disconnecting the rear pressure regulator(if fitted), to see if that's the problem.
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Offline jmorris

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Re: rear disc brakes not working mk3 16v gti with ABS
« Reply #6 on: 07 February 2011, 08:47 »
It's quite hard to explain fully but ill try...
When normally driving the front brakes work but lock up under heavy braking .the rears do not work at all.if you open the rear bleedd nipples no fluid comes out regardless of whether the engine is running or not.however when connected up to vcds and running the ABS pump bleeding cycle you het fluid when the program says "depress pedal" in step 3. At any other point in the cycle you get nothing what so ever.
Hope this is clearer
Jake
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Offline boneybradley

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Re: rear disc brakes not working mk3 16v gti with ABS
« Reply #7 on: 07 February 2011, 09:46 »
is the abs ecu under the rear seat as these models have a seperate pressure regulator and if that is stuck it could cause similar issues (more so if the car is lowered!)
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Offline jmorris

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Re: rear disc brakes not working mk3 16v gti with ABS
« Reply #8 on: 07 February 2011, 18:12 »
just checked under the seat- no abs controller, where do you guys reckon i should start first? abs pump? the pump part number is 1H2 614 217 B 63 . are any others compaible?
cheers
jake
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