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Discussion Starter · #1 · (Edited)
How to troubleshoot a code 00778 for a steering angle sensor (w/auto-scan)?

Got my new Ross-Tech interface this week and scanned for codes. I have the ESP light staying on (triangle, circle, exclamation point). The scan showed a steering angle sensor (G85) that had no signal communication (00778). Anyone suggest a logic tree to troubleshoot this? I also got the Bentley Repair Manual, maybe it has a method, but I missed it. The fuses are good. Is there ohm checks or something I can do on the sensor behind the steering wheel instead of shotgun maintenance and just swap parts? Thanks for any inputs.:beer:
 

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Discussion Starter · #3 · (Edited)
I'll have to run it again. I tried to save it and I didn't know till after the fact I could paste into word. I would have thought a "save as" message would have popped up with me choosing where I wanted to save it. I wrote down:

00778 steering angle sensor (G85)
004 - no signal communication

Thanks.
 

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Discussion Starter · #5 ·
If you clicked [Save] then the file should be stored here on your PC (assuming you're using VCDS Release 908.2 and it's installed in the default directory):

C:\Ross-Tech\VCDS\Logs\
Thanks. :thumbup:

Thursday,17,June,2010,15:33:59:43936
VCDS Version: Release 908.2
Data version: 20100326



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Address 03: ABS Brakes Labels: 1C0-907-37x-ESP-F.lbl
Control Module Part Number: 1C0 907 379 M
Component and/or Version: ESP FRONT MK60 0102
Software Coding: 0019970
Work Shop Code: WSC 24140 444 58899
1 Fault Found:

00778 - Steering Angle Sensor (G85)
004 - No Signal/Communication

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Chassis Type: 9M - VW Jetta IV
Scan: 01 02 03 08 15 16 17 19 22 29 35 36 37 39 46 47 55 56 57 75
76

VIN: 3VWVH69M93M123415 Mileage: 99270km/61683miles
-------------------------------------------------------------------------------
Address 01: Engine Labels: 022-906-032-BDF.lbl
Part No: 022 906 032 CS
Component: 2.8-LEV-Mj03 G 1482
Coding: 00032
Shop #: WSC 07458
3VWVH69M93M123415 VWZ7Z0B6206263

No fault code found.
Readiness: 0000 0000

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 1C0-907-37x-ESP-F.lbl
Part No: 1C0 907 379 M
Component: ESP FRONT MK60 0102
Coding: 0019970
Shop #: WSC 24140 444 58899

1 Fault Found:
00778 - Steering Angle Sensor (G85)
004 - No Signal/Communication

-------------------------------------------------------------------------------
Address 15: Airbags Labels: 6Q0-909-605-VW5.lbl
Part No: 1C0 909 605 F
Component: 04 AIRBAG VW61 0202 0001
Coding: 12340
Shop #: WSC 00066

1 Fault Found:
00532 - Supply Voltage B+
07-10 - Signal too Low - Intermittent

-------------------------------------------------------------------------------
Address 17: Instruments Labels: 1J0-920-xx5-17.lbl
Part No: 1J0 920 906 J
Component: KOMBI+WEGFAHRSP VDO V64
Coding: 07234
Shop #: WSC 00000
3VWVH69M93M123415 VWZ7Z0B6206263

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway Labels: 6N0-909-901-19.lbl
Part No: 6N0 909 901
Component: Gateway KCAN 0001
Coding: 00006
Shop #: WSC 00028

1 Fault Found:
00778 - Steering Angle Sensor (G85)
49-00 - No Communications

-------------------------------------------------------------------------------
Address 46: Central Conv. Labels: 1C0-959-799.lbl
Part No: 1C0 959 799 C
Component: 1H Komfortgerát HLO 0003
Coding: 00258
Shop #: WSC 00028

Part No: 1C1959801A
Component: 1H Tõrsteuer.FS KLO 0009

Part No: 1C1959802A
Component: 1H Tõrsteuer.BF KLO 0009

Part No: 1C0959811A
Component: 1H Tõrsteuer.HL KLO 0009

Part No: 1C0959812A
Component: 1H Tõrsteuer.HR KLO 0009

1 Fault Found:
00928 - Locking Module for Central Locking; Front Driver Side (F220)
27-00 - Implausible Signal

-------------------------------------------------------------------------------
Address 56: Radio Labels: 3B7-035-1xx-56.lbl
Part No: 3B7 035 180 E
Component: RADIO 3CP 0004
Coding: 00033
Shop #: WSC 00001

1 Fault Found:
00856 - Radio Antenna
36-00 - Open Circuit

End ---------------------------------------------------------------------
 

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Discussion Starter · #8 ·

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Discussion Starter · #9 ·

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[Select]
[03 - Brake Electronics]
[Measuring Blocks - 08]
Group 004
[Go!]
Check field 1, the value has to be between -4.5 and +4.5 ° when the steering wheel is straight.

Also note, if the sensor displays 0.0 ° turn the wheel left and right to make sure it's actually reading. If it's stuck on zero, you have a problem.

If the readings look good, try to run the Basic Setting for Steering Angle (G85) as described here: http://wiki.ross-tech.com/wiki/index.php/VW_Golf_(1J)_Brake_Electronics_(MK60)#Basic_Setting
 

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Discussion Starter · #11 ·
Well, it's been awhile, but I finally hooked up to the car. I think I did everything right and got a sensor signal of 0. I turned the wheel and got no readings at all. Two things here:

1. About 10 days ago I went over a RR crossing and got some wheel hop on the gas with a quick twitch of the steering wheel. Surprisingly, the light went off. I pushed the ESP switch and it came on. Hit the ESP switch again and it went off. That lasted for a couple miles until I got home. The next day, the light was on again.

2. I think the steering wheel may be off a smidge maybe a couple degrees? Not sure, but it doesn't seem perfect.
 

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Don't worry about the mechanicals (for now) if the car still drives straight.
If you got 0* and no change when you turned the wheel it sounds very much like a clock-spring or wiring to it.
Did you at least try and run the G85/ steering angle calibration? It could be as simple as that-- clear the other error codes also, and it never hurts to recode the can gateway after you clear the errors it had (just go to coding and recode to same- 00006?).
Then clear errors in ABS and engine modules if one pops up- THEN check/ calibrate G85. Seems a little redundant but from my experience the DTCs in the other modules create problems and prevent progress.
After that I'll pull the steering wheel and physically look at the clockspring/ connectors- look for the little clear window on the upper right- it should have a yellow mark in it.
:thumbup:
 

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Discussion Starter · #14 ·
Don't worry about the mechanicals (for now) if the car still drives straight.
If you got 0* and no change when you turned the wheel it sounds very much like a clock-spring or wiring to it.
Did you at least try and run the G85/ steering angle calibration? It could be as simple as that-- clear the other error codes also, and it never hurts to recode the can gateway after you clear the errors it had (just go to coding and recode to same- 00006?).
Then clear errors in ABS and engine modules if one pops up- THEN check/ calibrate G85. Seems a little redundant but from my experience the DTCs in the other modules create problems and prevent progress.
After that I'll pull the steering wheel and physically look at the clockspring/ connectors- look for the little clear window on the upper right- it should have a yellow mark in it.
:thumbup:

Thanks,

I'm new to this VAGCOM stuff (Sciroccos are much simpler!:D) and am leery about going in and making changes. I'm assuming clearing codes is okay and if there is an issue, they'll just return with no harm? "Recode the can gateway"?.....:screwy::confused::D
TMI!
 

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Just select the CAN gateway from the modules then -- > Coding then ---> Do It!
The number in the field will probably be 00006, whatever it is you don't need to change it, you're just telling the CAN to look at whats installed and initialize communication with it.
It's helpful anytime you make any changes- it's like a 'refresh' of what the ECU is monitoring.
Clearing codes is fine, but generally try and keep track (by copy-ing is easiest) of what's currently in error, so you know what's persistent and what's intermittent or new.
 

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I didn't read through the whole post but it appears you have a clock spring problem. If you removed the steering wheel at all you probably broke it. Check to see if you're getting an angle on it. If not you can reset it. Go to ross-tech and search that code there is a quick diy on re calibrating it.
 

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Discussion Starter · #17 · (Edited)
I tried going to module 19 CAN gateway and didn't get any communication. Doesn't CAN start with 04 models (based on the interface I needed for my 03 is KII-USB)?

Also went to basic settings and got as far as typing Group 060 and "do it" and it wouldn't allow me to turn on basic settings.....there was an error and the screen did not mention anything about "Activate Basic Settings".

Now that I finally got my radio code from the dealer and can disconnect the battery, I'm going to pull the steering wheel off and look for something obvious.
 

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The Gateway is integral with the instrument cluster on the Mk4 platform, but it should communicate. It is shown in the original scan above. Try scanning the Gateway with the engine running to rule out low voltage, just don't code the GW while running.

Just to clarify, this car has an internal CAN network that the various modules use to communicate to each other on. The scan tool (VCDS or dealer) communicates to the Mk4 via the old school "K" line, not CAN as the Mk5 and newer do.

--

Please try these steps:
[Select]
[03 - Brake Electronics]
[Coding-II - 11]
Enter 40168, to enable the basic setting.
[Do it!]
[Basic Settings - 04]
Group 060
[Go!]
Activate the Basic Setting.
[ON/OFF/Next]
After a successful basic setting, field 2 should say "OK".
[Done, Go Back]
To make sure the basic setting was successful, check the sensor again.
[Measuring Blocks - 08]
Group 004
[Go!]
Check field 1, the value has to be between -4.5 and +4.5 °.
[Done, Go Back]
[Close Controller, Go Back - 06]

If that doesn't work you might have a problem, such as a faulty sensor or wiring, that is preventing the calibration.
 

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Discussion Starter · #19 ·
--

Please try these steps:
[Select]
[03 - Brake Electronics]
[Coding-II - 11]
Enter 40168, to enable the basic setting.
[Do it!]
[Basic Settings - 04]
Group 060
[Go!]
Activate the Basic Setting.
[ON/OFF/Next]
After a successful basic setting, field 2 should say "OK".
[Done, Go Back]
To make sure the basic setting was successful, check the sensor again.
[Measuring Blocks - 08]
Group 004
[Go!]
Check field 1, the value has to be between -4.5 and +4.5 °.
[Done, Go Back]
[Close Controller, Go Back - 06]

If that doesn't work you might have a problem, such as a faulty sensor or wiring, that is preventing the calibration.
I clicked on the [ON/OFF/NEXT] That is where I got an error. Because of the intermittent time it worked as stated previously, I think I'll check the steering column components. Thanks.
 

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Discussion Starter · #20 ·
Finally took the steering wheel off and took off the angle sensor to look for anything obvious. Couldn't find anything and put it back together and the light was gone. Hit the ESP switch a few times and the light went off/on as required. The yellow flag was shown in the upper right window.........I don't know. We'll see if it comes back.
 
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