PC2CV wrote:
The only failure point at the MOT was an ABS light, It has a problem with the ABS block, according to the lexia tool. Took it out to realise that there is not much in there that can be worked on:
What was the fault code precisely ? What you have taken apart is the hydraulic block for the ABS, but unless the fault code explicitly suggests the hydraulic block is faulty I would have my doubts that it would be the problem.
The vast majority of ABS faults are electrical in nature, typically either wheel sensors or wiring. ECU failures are rare and I've actually never heard of anyone having to repair the hydraulic block itself...
If you have a Lexia finding the problem is going to be much easier. Aside from fault codes, you are able to test the wheel sensor speeds (jack the car up and spin the wheels and watch the reading on the Lexia) and also test the actuation of the hydraulic block - you do this by holding down the brake pedal firmly with something like a length of wood wedged against the seat then tell the Lexia to test a particular wheel - you then try spinning the wheel by hand with it raised off the ground and you'll find that during the test the wheel locks and unlocks repeatedly under computer control even though the brake pedal is held down.
This is an indication that the hydraulic actuator for that wheel is working as it should. The electrovalve controlled valves in the block turn off the brake on that wheel when energised, as their default mechanical position is of course for the brake to be enabled for safety reasons and the ECU will only disable the brake on an individual wheel under very specific and carefully controlled circumstances.
