audi a2 abs

[sam sam]

i have a x regd audi a2 1.4 se 41k miles, the abs warning light is permanently on and the power steering light also, does not seem to be a problem with the car. the garage says it is either a sensor on the steering that requires replacing £40 + fitting or most probably it could be the power steering rack £600 + fitting, they are unsure what the the correct solution is
This information as been taken from the diagnostic codes, has anybody else encountered this problem, and if so what was the remedy

[Crasher]

Hello and welcome. We need those codes posting to be of more help. You say there isn't a problem with the car but is the steering heavy? The racks aren’t always the fault in fact it is rare but the pumps are always going faulty. Has the car taken a knock to the left front corner that you know of?

[sam sam]

the steering is ok, the only thing that is not working is the ABS. I have contacted the garage ref the codes. the car has never been in an accident

[sam sam]

the ref code is 00778, hope this is ok

[Crasher]

That is a problem with the steering angle sensor, has the steering wheel been off or the tracking adjusted?

[sam sam]

Thats exactly what the garage said, they have spoken with the Audi dealership, who said they could replace the steering angle sensor, but in their experience this does not always work and they have had also to replace the power steering rack, how does this all relate to the non functioning of the ABS.
I have owned the car for over 2 years and have never had the steering wheel off or the tracking done
The cost of the repair will be around £1000 with parts

[Crasher]

First of all I would ask them to reset the steering angle sensor which is done by connecting a suitable diagnostic computer and then start the engine, turn the steering one turn to the right and one turn to the left. Drive a short distance in a straight line on a level surface at a speed not higher than 15 mph. If the steering wheel is straight during the test drive then stop the vehicle with the wheels pointed straight ahead. The steering wheel must not be moved again until after the reset procedure is completed. With the engine still running, Select 03 ABS brakes, then Login 11 and enter the code 40168, click “Do It!” and exit Login 11. Enter Basic Settings 04, group 060 and click “Go!”. This will store the zero (centred) position of the steering wheel. There should be a displayed message that reads: "Steer. angle sender compens OK". Click “Done, Go Back” and try it.

[bumblebees]

Crasher: please help...or anyone else. My wife was hit on last friday and idiot ran away. I have tried fixing and replacing the damaged steering rack as the front wheel steering rod ends had bent. I replaced with a second one and even bought new steering rods to make sure. the steering is worse..... In my attempt its brought all the lights ON. ABS etc. The steering is now going crazy....heavy light heavy light making it very difficult to drive. I have then gon and replaced the steering rack still no problem. The electrick pum keeps making a noise so i presume it is working. I cant seem to figure the exact centre of the steeing wheel as i thot it was steering column sensor that had gone as Sensor was saying CODE 85. does anyone know how i can resolve this. Regards

[Crasher]

Hello Me Bee. It sounds like you have some sort of diagnostic equipment, what is it and can it do Measuring Blocks and Basic Settings? Which year and engine code is the A2? It is very important I know which exact model year it is, there were some major changes.

[bumblebees]

Evening Stuart,

Thanks for prompt reply. Mine Engine number is BBY476346. registered 05 2004. Hope this helps

[Crasher]

Your A2 has the later CAN BUS system. With the faults you have it is imperative that the first step is a full vehicle systems fault code read, print out the codes and then clear the codes. Then take the car for a test drive if possible and more than likely one of more codes will come back and so a re-read and print out those codes can be compared with the first read and we can take the next step. Some codes you can get may only come back after a quite lengthy drive along a mixture of roads, in particular, a long straight. There are certain fundamental errors you could have made involving centring the rack, it is extremely important that the rack is precisely centred at 72.5-mm (dimension A) with the subframe aligned with special locking pins and with the steering wheel in the dead centre position (only possible by using the Measuring Blocks function of the ABS system on a diagnostic display in Display Group 004, Zone 1) only then should the column be connected to the steering box. Next the tracking must be set so that the wheels are pointing directly straight ahead at zero degrees; the setting is a very precise and slightly odd 4′ ± 5′. It is important that the front wheel camber of - 35′ ± 20′ is correct BEFORE setting the tracking. Then you have to perform the Basic Settings procedure by logging into the ABS system using code 40168 and then perform the zero compensation setting of the steering angle sensor in Basic Settings 04, Group 060. When this is done, hopefully you will have no further problems but if you do, you will have to work through the fault codes as they come up until the system is happy. The other potential problem is of course the rack you have fitted. There are four racks used on UK spec A2's from 2000 to 2004 and the one for the 2004/5 models is specific only to cars of the 2004/2005 model years so cars from VIN WAUZZZ8Z14N000001 onwards.

http://i222.photobucket.com/albums/dd20/Crasher1964/A2rackcentering_zpse908ba52.jpg (http://s222.photobucket.com/user/Crasher1964/media/A2rackcentering_zpse908ba52.jpg.html)