**RESOLVED** Unable to complete Steering Limit Stop Adaption

[jason_rmh]

Background...
My Mk5 has been parked up for a few weeks. The battery went completely flat.
Last week connected the battery to my CTEk battery charger / maintainer for a few days.
Car now starts, electrics work etc.
The car has then been sat for another week, but still starts fine.

I get the expected power steering, ABS and traction control lights on the dash.
So set about completing the basic settings / adaptation as I have done before.
This time, the Steering Limit Stop incorrectly coded fault will not clear.
Steering angle sensor in measuring blocks does not change from 0 in VCDS when the wheel is turned.
On running a full scan, I found that the Steering Module (16) is showing:

Code: [Select]

Address 16: Steering Wheel
01044 - Control module incorrectly coded.

Address 44: Steering Assist
02546 - Steering Limit Stop
   005 - No or incorrect basic setting / adaptation

00778 - Steering Angle Sensor (G85)
   000 - -
     Freeze frame:
This fault will not clear and is probably preventing me from performing Steering Limit Stop adaption?

• I have completed the G85 Steering Angle Sensor basic settings, from the ABS Module (03): http://wiki.ross-tech.com/wiki/index.php/VW_Golf_(1K)_Brake_Electronics_(MK60)
• I completed the Steering Limit Stop Adaption from the Steering Assist module (44) : http://wiki.ross-tech.com/wiki/index.php/VW_Golf_(1K)_Steering_Assist#Steering_Limit_Stop_Adaptation
• I have been for a test drive, driven in figure of eight, etc.

I think the incorrectly coded error on steering module is preventing me doing the steering limit stop.
I have put the car back on charge to see if battery voltage is causing any of my issues.

Failing that, any ideas on Steering Module incorrectly coded?
Its set to 000532 which it has been since fitting Mk6 MFSW a few years back.
Nothing has been removed, just the battery went flat.

I'll post a scan shortly.
Thanks
Jason

[jason_rmh]

I changed steering wheel coding from 0000532 to 0000534 rear wiper, on-board computer via wiper stalk).

This gets rid of the incorrectly coded error, although mfsw no longer works, but just to eliminate things...

With module 16 no longer showing errors, measuring blocks for steering angle sensor still don't register when the steering wheel is turned. Eg. Stays at 0.

I'm hoping the steering angle sensor or steering wheel control module hasn't randomly gone faulty...

Edit: the incorrectly coded error came back so I have set the coding back to 0000532.

Maybe the steering wheel control module is faulty?
Jas

[jason_rmh]

Even though I have done the G85 basic settings, measuring blocks show G85 has not be initialised.
This in turn means the steering stop limit cannot be completed.

After a bit of googling it is possible the problem could also be a faulty wheel speed sensor. which prevents G85 being adapted correctly.
Although I have no errors logged, I'm going to log the wheel speed sensor signals in graphic mode in VCDS.
This will show if any of them are not operating correctly.

I'll also check sensor, wiring and rotor.

For now, I have no power steering 

[jason_rmh]

I figured this out so here it is in case it helps others...

Symptoms
My battery had gone totally flat as the car had been sat for a while.
On re charging the battery, all the warning lights were on the dash.
I could not clear the ABS / Power Steering / Traction Controls lights.

My issue was that the G85 Steering Angle Sensor would appear to accept basic settings, but they were not taking effect.
Steering angle in measuring blocks (ABS, group 4) was showing 0 degrees, even when turning the steering wheel.
As a result, power steering was disabled and ABS was cutting in when coming to a normal stop at junctions, round abouts etc.

The error regarding Steering incorrectly coded was a red herring (and is still happening intermittently).

Cause
On the mk5 golf with MK60 ABS, the G85 basic settings are done via module 03 - ABS (not 44 - Steering Assist).
G85 will not accept basic settings if there are faults present in the ABS module.
Although I had no faults present, I started to wonder if the ABS may be faulty.
I read this on Ross Tech website:
Check all Adaptation values in the #44-Steering Assist controller.
Verify all of the WSS (Wheel Speed Sensor) values are plausible in the 03-ABS controller!

Diagnosis
On the mk5, each wheel bearing has a sensor ring built into it which is read by a wheel speed sensor which mounts in the hub.
Rear bearings causing ABS issues seems a common issue on the mk5.
So, I used VCDS Graph mode to log the wheel speed sensors:

Goto Module 03 - ABS, log group 1 and click Graph.


Starting logging and drive at slow speed, approx 20mph.
The graph shows a line for each wheel speed sensor.


You can clearly see, the rear right sensor is not consistent with the others. 
So, I ordered a pair of rear wheel bearings, do them both at the same time.

Resolution
Now, on the Mk5 there are 2 options for rear wheel bearings, normally denoted by the internal diameter of the bearing, 30mm or 32mm.
It is possible to tell which you need, as they are physically different in appearance.

Jack up the rear of the car and look at the rear face of the hub.
This is mine (30mm) from the rear when mounted on the car (new one):


If you see a cast metal surface, you need 30mm (type 2 on picture below).
If you see a smooth metal surface, you need 32mm (type 1 on picture below)..


I only now know this as the parts guy supplied me the wrong one, even after checking my reg no, and I obviously found out when the car is stripped down!
So I sourced a new set locally.

Old bearing before removal, its heavily corroded:


Old bearing removed, you can see the actual speed sensor mounted through the hub:


Here is the faulty rear right bearing. You can see the damage sensor coating that corresponds with the bad reading on the VCDS graph.


I think this was was damaged as the speed sensor had been touch the surface of the bearing, wearing away the coating.
The speed sensor itself is moutned with a single torx screw, I think it had been overtighted, forcing the sensor further in.

New one:


So, rear wheel bearings and sensors replaced.


Then I did another log of the speed sensors to prove the issue is resolved:


Basic Settings
Then I did basic settings as usual, this time everything went to plan:

First, Basic Setting for Sensor for Steering Angle (G85):
This is done from the ABS module, not Steering Assist.
http://wiki.ross-tech.com/wiki/index.php/VW_Golf_(1K)_Brake_Electronics_(MK60)

Then Steering Limit Stop Adaptation:
http://wiki.ross-tech.com/wiki/index.php/VW_Golf_(1K)_Steering_Assist#Steering_Limit_Stop_Adaptation

Finally, if you have the ABS test function activated, its easy to do if you are near a round about or have a large car park with no obstacles.
Press the brake pedal hard while stationary to start the test, the traction control liight will flash to signify the test has been strated.
Drive straight (towards the round about, no faster than 20mph).
Drive steadily around the round about, trying to keep the steering wheel at about 40 degrees. After about 5m of turning the lights should go out.
Here are the offical instructions:
http://wiki.ross-tech.com/wiki/index.php/ESP_System_Function_Test

Anyway, a bit of a pain, but all sorted, hope this helps someone!

Jas
 

[99hagued]

Good work mate, useful info 

[grey golfster]

Another example of this forum at it's very best!
Even down to the"resolved" in the header!
Top work, many thanks!

 

This post alone should be worth a forum donation from a few of the tightwads out there! 
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[Tommihayes]

Great post mate. I've got a plethora of abs errors and will be referring to this over the coming weeks! Great forum etiquette completing your work and completing the post.

[jason_rmh]

No problem, I've gained plenty of help and knowledge by others doing the same, given I couldn't find much on this particular issue so hopefully it helps others.

Jas

[doylebros]

Well done to you

I only hope a the Mods adds it to the following thread

http://www.mk5golfgti.co.uk/forum/index.php/topic,52731.0.html

So other members can find it to refer too, cause the wheel bearing size identification pointer alone will save so many people so much time!

[mkmg76]

Excellent work and a very detailed write up. Well done. 

If I may add for anyone who reads this in future, there are certain brands which supply the bearings without the extra detailing on the rear. Optimal is one and FEBI or Bendix are others so a visual inspection is not 100% confirmation of the type required. So really, your only option if you don't have access to an OE parts lookup service is measurement of the hub when the bearing is removed.

For details you might want to have a look at my thread for details. Page 3 in particular deals with these bearings specifically.

HTH 

[Andy]

Excellent news Jason and glad you got it sorted

[v4rley]

@jason_rmh thanks for this info 

Think I have the same issue a you, just wanted to see if you agree.

I had an issue with a rear wss which was changed and still persisted so my next route is to replace the hub / bearing. In the mean time I though I wouldn’t perform a battery drain test, I did this and upon reconnecting the battery i have been left with heavy steering and yellow wheel on the dash. The G85 doesn’t show any change when moving the wheel always showing 0 it won’t let me perform the basic setting. I tried by removing the wss code but still wouldn’t work but obviously you didn’t have a code either

[jason_rmh]

@jason_rmh thanks for this info 

Think I have the same issue a you, just wanted to see if you agree.

I had an issue with a rear wss which was changed and still persisted so my next route is to replace the hub / bearing. In the mean time I though I wouldn’t perform a battery drain test, I did this and upon reconnecting the battery i have been left with heavy steering and yellow wheel on the dash. The G85 doesn’t show any change when moving the wheel always showing 0 it won’t let me perform the basic setting. I tried by removing the wss code but still wouldn’t work but obviously you didn’t have a code either

Sounds like a similar issue.
What lead you to replace the wheel speed sensor?
Also, did you check the loom to the sensors? The same symptoms can be caused by a broken wire to the wss.

Have you got vcds? If so, do a logging test as I did above, this will show if all wss are behaving correctly and identify the problem one, if any.

If one is not working correctly, you won't be able to do basic settings.
It's a pain, because something isn't right, but there are no errors to point you to the problem.

Jas

[v4rley]

Wow what a response time. 

I got code 00290 for rear left G46 failure, when removed it was worn on the tip and suspect the abs ring is corroded didn’t inspect the loom.
I have a noisy wheel bearing and typically changed the rear right bearing last year but obviously was the wrong one.

Yeah will do some logging at some point, bit fed up with vcds as been on it most of last night and today trying to do basic settings even tried a know working G85.

Just didn’t expect the rear to have any effect on the front steering bit guess the system all one. Thanks will report back once new bearing fitted

[jason_rmh]

It all seems to be black magic, but the wss on all wheels seems to be needed by the abs unit which in turn is required for power steering, traction control etc.

Hopefully the log will show a dodgy reading from the suspect bearing to help pinpoint the issue.

It took me a good few days of head scratching to get to the end result.

Keep us posted!
Jas