Please explain this. I have not a clue how this is possible. I'm very interested.
There isn't a ton of info on the RossTech site about it, but this is their schpeel:
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Rosstech Website:
Procedure for Bleeding the ABS Brake Pump in many older VW Golf, GTI, Jetta, and Audi TT with Mk20 or Mk60:
[Select]
[03 - ABS Brakes]
[Basic Settings - 04]
Group 001 (may be group 002 in Mk3 VW Golf/Jetta)
[Go!]
This will trigger the ABS pump to turn on for about 10 seconds. You should hear the fairly loud pump clicking during this time.
Click the [Done, Go Back] button and you're all set.
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Rosstech lists the above procedure for "older cars".
Here is a much better explaination of the procedure (this is exactly what I did, no need for me to re-write it)
(click "on/off/next" instead of continue)
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From TDI Forums (posted by losvre):
tools & stuff you need
brake fluid (3L)
2 x 11mm spanners
2 x bleed tubes with one way valves on
2 x receptacle at least 1L in capacity
first you need access to the front bleed nipples, i jacked up the front, placed on axle stands and removed both wheels.
then put the spanner, bleed tube and receptacle on each side.
open the brake fluid resevoir and have your fluid ready to keep the resevoir topped up at all times. i got a friend to do this to speed things up, it's probably possible on your own but will take a while longer.
goto ABS, basic settings blah blah whatever it is and click from
000 up to
001 and then you get a MSG on the screen saying "PRESS AND HOLD PEDAL" or words to that effect. whilst doing this the ABS pump is activated and the pedal can be felt kicking back
(002) it stops pumping and your told to relase the pedal and open the front 2 bleed nipples, then you need to
click to continue
(003) it will tell you to wait for 10 secs whilst the ABS pump is activated and fluid is pumped out of the now open bleed nipples
(004) it tells you to pump the pedal 10 times and then close the bleed nipples, then you need to
click to continue
(005) "PRESS AND HOLD BRAKE PEDAL" untill told to stop
(006) it stops pumping and your told to relase the pedal and open the front 2 bleed nipples, then you need to
click to continue
(007) it will tell you to wait for 10 secs whilst the ABS pump is activated and fluid is pumped out of the now open bleed nipples
(008) it tells you to pump the pedal 10 times and then close the bleed nipples, then you need to
click to continue
(009) "PRESS AND HOLD BRAKE PEDAL" untill told to stop
(010) it stops pumping and your told to relase the pedal and open the front 2 bleed nipples, then you need to
click to continue
(011) it will tell you to wait for 10 secs whilst the ABS pump is activated and fluid is pumped out of the now open bleed nipples
(012) it tells you to pump the pedal 10 times and then close the bleed nipples, then you need to
click to continue
(013) "PRESS AND HOLD BRAKE PEDAL" untill told to stop
(014) it stops pumping and your told to relase the pedal and open the front 2 bleed nipples, then you need to
click to continue
(015) it will tell you to wait for 10 secs whilst the ABS pump is activated and fluid is pumped out of the now open bleed nipples
(016) it tells you to pump the pedal 10 times and then close the bleed nipples, then you need to
click to continue
(017) ABS BLEED PROCESS COMPLETE!
once your done approx one litre of fluid will have been expelled from each caliper
points to note, i did not go full travel on the pedal every time, i probably only used about 75% of the pedal travel and i pumped the pedal slowly to prevent damaging the master cylinder seal which everyone is always banging on about.
so from the above you can see it's 4 complete cycles, not 17 cycles as someone suggested but 17 is the number you'll see on the left at the end when it says it's completed.
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It isn't really practical for just bleeding the brakes, as it expels alot of fluid if you go through the whole thing, but if you stopped after one cycle it would probably be ok. I manually bled the brakes at each wheel after the fact just to make sure there was no air in the system, and there wasn't - the VCDS procedure expelled all of the air. I am super glad I ended up getting the cable, thanks again Ross-Tech! :clap:
This made sense for me because I had air in the master cylinder and probably the abs pump that I couldn't get out with a regular bleeding procedure. For small amounts of air in only the brake lines, it would probably be easier to just use the tried and true 2 man pump-and-run method that we all have done before (1 guy opens the screw, other guy pushes brake to floor, guy 1 closes screw, repeat x2 then switch to the next wheel).
