ABS Output Tests

[eca02apc]

Hi All,

Long-time viewer, new poster here!

I've overhauled the brakes and performed a bleed of all 4 callipers, plus the clutch on my 2003 A4 1.8TQ, but the pedal still seems soft to me, with bite only starting around 1/4" from the top of the pedal. I suspect it may be due to air in the ABS module as the pedal firms up a little after doing a hard stop and making the ABS cut in.

I would like to perform the ABS output test whilst bleeding the brakes again, but I can't get it to work :-( Using the output test just comes back with test complete immediately and without running the ABS pump or anything. I followed the Ross-tech guide but to no avail - same test complete problem.

I've got a fully registered version of VAG-COM 409.1 but one of the cheap blue USB cables from eBay. Is this where my problem lies, or am I missing something?

Many thanks for your help.

[NHN]

Check on Ross-techs site of comparison of products.

[eca02apc]

Comparing interfaces or software version? Do you have a link?

[NHN]

Ross-Tech: VCDS: Function Table

If still in doubt, contact RT to see if you require the better cable for the specific access to the tests you're doing, if so then give me a shout as I sell this interface.