Talk:Anti-lock braking system

Original post from alex:

Ok here it goes : It all started with an AIRBAG light on, and after some searching I believed the culprit might have been the clock spring so I went ahead and replaced it (http://forums.audiworld.com/showthread.php?t=1589550 ), well after everything is plugged back and finished there are 2 fault codes in the ABS controller :

00778 - Steering Angle Sensor (G85) 66-10 - Not Matched - Intermittent 01044 - Control Module Incorrectly Coded 35-00 - -

So the ABS controller needs to be recoded FIRST (seems that every time a component is removed the ABS codes set back to all 0-s ) and then the new (or used) clock spring needs recalibration- this is the order to get this done ! of course this is done if the alignment is correct, the car tracks straight and all the ABS components are in good working order condition. if you can't connect to the ABS controller to read faults standing still that means your module is bad (and over 20mph the ABS will cut connection with the com port /VAG !), so the following will not work.

Here are the steps :

1) Key on, start the car move the steering wheel 10* right then left ( about ½ turn each way is enough) then set the steering wheel straight as it would be if driven in straight line ,

2) Go ahead and start driving for about 50feet with the steering wheel in that straight position and keep it that way w/o moving it ( this is all it took me to get this done, others said they had to drive a longer distance - honestly I don't think it's even needed).

3) Connect with VAG :

Goto 03 -Brakes/ABS Pick (left middle) Login 11 - 09495 - DO IT Recode - Coding:04395 AND Workshop Code - 06435- DO IT.

( the code 09495 is for a B5, s4 manual trans , h2p brakes : other cars need different codes !!!! See page 20 of this document : http://vwforum.vwforum.ro/index.php?act=attach&type=post&id=128417 )

4) Now it's time to recalibrate the clock spring ( all this time the steering wheel has no moved, if it did , it's ok you start from this step on - just make sure that now the ABS controller window in BAG doesn't list all zeros for SOFT : 00000 coding and SHOP#: WSC 00000, if it does start from step 1). Clear all the codes in the ABS , get out of it (close controller) and get back in it , now the ABS Controller window should read : SOFT CODING 04395 and SHOP# WSC 06435,

[Login - 11] Enter 40168 [Do It!] Now chec what's in this measuring block 001: go to [Basic Settings - 04] Group 001 [Go!]

It should say that the clock spring is calibrated and ok, and NO error messages ! if you have error messages, you have start again from step 4 ( turn off the engine , start it back up , turn the steering ½ turn each side , drive straight 50feet , with the wheel straight the whole time , leave it that way with engine running , carry on the calibration WITHOUT MOVING THE WHEEL ! )

5) Check fault codes and you'll see this : 01486 - System function test activated Now it's time to carry on the test, I had to do this a couple times .. to get all the lights off the dash . ABS light was last . I basically needed to take the car for a drive around , make a few turns , hit the brakes , come to a stop .. and eventually all went away never to come back &#61514;

Here are ROSS-Tech instructions to complete the test ( this did NOT work for me ) : Notes Pre-Conditions Instructions After doing all this the ABS light stayed ON and I had to stop the car, upon startup all the lights were back up and apparently the system only wanted to start the self testing again , as it was still looking for some data ..not sure what , but I went for a drive and one by one all lights went away.
 * The ESP road test serves to check the plausibility of the signals from the lateral acceleration sender, rotation rate sender and pressure sender.
 * It should always be carried out after removing or replacing any parts of the ESP system.
 * It is not possible to cancel the ESP road test after it has been started. The complete test procedure must be performed.
 * ABS/EDS Warning Light (K47) ON and ASR/ESP Indicator Light (K86) ON.
 * Engine RUNNING.
 * Vehicle standing.
 * Press brake pedal firmly until the ASR/ESP Indicator Light (K86) goes OFF. A brake pressure of at least 35 bar needs to be reached for this. (this did not work for me - I had to drive a bit and when I came to stop the ESP light went away, pressing the pedal standing still did nothing )
 * Start road test (Do this on an enclosed site or make sure to drive according to traffic regulations).
 * Make a right turn, then a left turn (or vice versa). A rotation rate (turn rate) of ~10 °/s must be reached while driving these turns.
 * The ABS/EDS Warning Light (K47) should now have turned OFF.
 * A common example for turns like this is driving turns with a radius of 10 to 12 meters (30 to 40 feet) with a speed of 15 to 30 kph (9 to 18 mph).
 * The ABS, EDS, ASR and ESP functions may NOT get activated during these test.
 * Doing other maneuvers between the turns will have no influence on the ESP System Function Test.