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Thread: Central Electrics Gremlins

  1. #11
    Ross-Tech Employee Jef's Avatar
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    In my drunken state, I kind of messed up like the dog does to my carpet here in my basement office every damn morning now.... Your ABS module is dead, I had incorrectly stated it talks VCDS, but it does not. At least I was correct about the ECM giving it a big fat 0.

    Get a test light and verify you have good power and grounds for the ABS module. /2 /6 and /23 are powers. /1 and /5 are grounds. /11 is data for scan tool. If powers/grounds/data are in place then you have a bad module. These ABS modules can be swapped out without cracking open the system. Pull the left front fender liner out and you can remove the ABS brain from the valve block, pretty easy to do. The only "tricky" part I would say is... if you go with a used part, it must be a matching part number to the original... and since the original is dead, it is a touch difficult to verify just what part number that would be.
    Jef
    Ross Tech Support Team, Alpha Squad
    Auto-Scan, learn it, love it, live it... then check the fuses.

  2. #12
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    Well, I've downloaded the erWin manuals that I'd never heard of till a week ago. Now if I only knew what to do with them... I've taken a look at the brakes manual (helpful) and the wiring manual (less helpful as it has no index or TOC and is about a million pages long). To MasterTommy's point, it'd be darn good to make a conclusive and comprehensive diagnosis so that I could get at least a good "guesstimate" as to the end-game cost for repairs. I just haven't a clue where to start. Another thread suggested perhaps a fuse under the ECU cover had blown but darn me if I could find the thing in the wiring manual. Where would you knowledgable and experienced types start in order to build a comprehensive estimate?

  3. #13
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    Quote Originally Posted by Jef View Post
    In my drunken state, I kind of messed up like the dog does to my carpet here in my basement office every damn morning now.... Your ABS module is dead, I had incorrectly stated it talks VCDS, but it does not. At least I was correct about the ECM giving it a big fat 0.

    Get a test light and verify you have good power and grounds for the ABS module. /2 /6 and /23 are powers. /1 and /5 are grounds. /11 is data for scan tool. If powers/grounds/data are in place then you have a bad module. These ABS modules can be swapped out without cracking open the system. Pull the left front fender liner out and you can remove the ABS brain from the valve block, pretty easy to do. The only "tricky" part I would say is... if you go with a used part, it must be a matching part number to the original... and since the original is dead, it is a touch difficult to verify just what part number that would be.
    Thanks Jef, we could compare bad canines but trust me, that's one thing I'd win in this forum. So ABS dead, Check. I'm kind of trying to figure out what else might be dead or in need of repair also. I can't afford to keep wrenching on this thing every time I get a moment off. I presume the pin-outs you've stated above are on the connector attached to the ABS control module correct? Could I not just verify those readings with a multimeter rather than rigging up a light? Regarding the part number issue, is it not the same for new or used? I have to verify the exact part number either way, yes/no?

  4. #14
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    Hi Jef,

    Here are my readings:

    Pin 2 = 12 Volts / Pin 6 = 12 Volts / Pin 23 = 0 Volts / Pin 11 = 12 Volts (not sure if that matters..) Pins 1 & 5 are good grounds.

    So how important is pin 23 and its voltage? I ask because I've got "0" volts on pin 23. I am unable to find the exact pin-out for J104 (I think its J104, but the connector attached to the ABS Control Module) nor can I find an actual schematic or pin by pin wiring diagram. The next obvious question is what supplies this voltage to pin 23 and where does it originate from, route through, etc. I've emailed the erwin folks for a little guidance on the manuals but in the meantime thought I'd share my findings with you in hopes you'd share a bit more insight with me.

    Thanks.

  5. #15
    Ross-Tech Employee Jef's Avatar
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    /23, 1.0mm² sw/br gets power from fuse S7 which looks to be a 10A fuse.... so maybe this just needs fuse S7 to be replaced.

    I would suggest you purchase the cheapest erwin.audi.com package and print-to-PDF everything, including wiring diagrams. If you are unsure how to read factory wiring diagrams, I've got you covered:

    https://www.ross-tech.com/training/
    Jef
    Ross Tech Support Team, Alpha Squad
    Auto-Scan, learn it, love it, live it... then check the fuses.

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  7. #16
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    Yep, you do! Found it in the wiring manual with a little instruction.. Just went out with a flashlight and pulled it, fuse is indeed blown. Now why it blew is the next question. It's gonna kill me to have to wait until after work tomorrow to swap it out and see what happens but at least its progress! I'll update after I test tomorrow.

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  9. #17
    Ross-Tech Employee Jef's Avatar
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    Unplug the ABS module then replace the fuse again... if it pops, wiring. If not, looks like an ABS module issue.
    Jef
    Ross Tech Support Team, Alpha Squad
    Auto-Scan, learn it, love it, live it... then check the fuses.

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  11. #18
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    Well, I replaced the fuse, ran an autoscan, cleared the faults, drove the car around then ran another scan. So far the fuse has not blown again. What's even more exciting is that several other errors have cleared as well and my speedometer is working again. Whoo!! I do still have a lingering issue with the license plate light which I believe to be an electrical or wiring problem (hasn't worked since I've owned the car) and I've got an airbag fault that seems to be intermittent which has also been the case since I've owned the car. I'll call those my "known issues". Most intriguing however is the new fault I'm seeing which is a "steering angle sensor" and I notice that is also in the ABS module. So perhaps that unit may be defunct after all or I have more troubleshooting to do. I'm including the latest scan below. From a forum "best practice" standpoint should I create a new post for this issue or continue on in this thread? Not sure how you guys like to organize such things but do want to be a good citizen of the community so to speak. Much thanks for all your help thus far.

    Code:
    Thursday,15,August,2019,18:00:14:23170
    VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
    VCDS Version: 19.6.1.0 (x64)  HEX-V2 CB: 0.4508.4
    Data version: 20190529 DS308.0
    www.Ross-Tech.com
    
    
    VIN: WAULC68E05A114733   License Plate: TONY A4
    Mileage: 274950km-170846mi   Repair Order: new fuse after clearing dtc
    
    
    
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    
    
    Chassis Type: 8E (8E - Audi A4/S4/RS4 B6/B7 (2001 > 2008))
    Scan: 01 02 03 08 09 0F 11 15 16 17 18 25 36 37 45 46 55 56 57 65
              67 69 75 76 77
     
    VIN: WAULC68E05A114733   Mileage: 274950km-170846miles
    -------------------------------------------------------------------------------
    Address 01: Engine        Labels: 06B-909-518-AMB.lbl
       Part No SW: 8E0 909 518 BC    HW: 8E0 909 018 A
       Component: 1.8L R4/5VT     G   0020  
       Revision: 00000000    Serial number: AUZ6Z0D0371349
       Coding: 0016751
       Shop #: WSC 11111 111 45799
       VCID: 72BDDAB038BA89B7CCD-5160
    
    No fault code found.
    Readiness: 0010 0100
    
    -------------------------------------------------------------------------------
    Address 02: Auto Trans        Labels: 01V-927-156.lbl
       Part No: 8E0 927 156 AA
       Component: AG5 01V 1.8l5VT USA 0505  
       Coding: 0001002
       Shop #: WSC 06325 000 00000
       VCID: 6D87C9CC2184564F11F-5160
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 03: ABS Brakes        Labels: 8E0-614-517.lbl
       Part No: 8E0 614 517 A
       Component: ABS/ESP allrad      4529  
       Coding: 04277
       Shop #: WSC 06435  
       VCID: 2615F6E0C1F2A517905-51A8
    
    3 Faults Found:
    00778 - Steering Angle Sensor (G85) 
                37-10 - Faulty - Intermittent
    01826 - Sensor for Steering Angle (G85); Supply Voltage Terminal 30 
                35-00 - -
    00778 - Steering Angle Sensor (G85) 
                27-00 - Implausible Signal
    
    -------------------------------------------------------------------------------
    Address 08: Auto HVAC        Labels: 8E0-820-043.lbl
       Part No: 8E0 820 043 AD
       Component:   A4 Klimaautomat   1424  
       Coding: 00000
       Shop #: WSC 06325  
       VCID: 6393AFF4F240103FB7B-513C
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 09: Cent. Elect.        Labels: 8E0-907-279-8E2.lbl
       Part No: 8E0 907 279 E
       Component: int. Lastmodul  USA 0305  
       Coding: 00003
       Shop #: WSC 00000  
       VCID: 34311CA8072EC7871E1-4B00
    
    1 Fault Found:
    01504 - Bulb for License-Plate Light (X) 
                57-00 - Electric Circuit Failure
    
    -------------------------------------------------------------------------------
    Address 15: Airbags        Labels: 8E0-959-655-84.lbl
       Part No: 8E0 959 655 K
       Component: Airbag 8.4EP        1001  
       Coding: 0010607
       Shop #: WSC 06325 000 00000
       VCID: 3FDB43843B6814DFF33-5184
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 16: Steering wheel        Labels: 8E0-953-549.lbl
       Part No: 8E0 953 549 N
       Component: Lenks·ulenmodul     0611  
       Coding: 01041
       Shop #: WSC 11111  
       VCID: 3E253E8039621DD7F85-4B00
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 17: Instruments        Labels: 8E0-920-9xx-8E2.lbl
       Part No: 8E0 920 950 P
       Component: KOMBI+WEGFAHRS. RB4 D42  
       Coding: 01231
       Shop #: WSC 03131  
       VCID: 363526A01152D597205-5160
       WAULC68E05A114733     AUZ6Z0D0371349
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 46: Central Conv.        Labels:. 8E0-959-433-MAX.clb
       Part No: 8E0 959 433 BB
       Component: Komfortger·t T7B    1612  
       Coding: 11788
       Shop #: WSC 06325  
       VCID: 72BDDAB03DBA89B7CCD-4B00
    
       Subsystem 1 - Part No: 8E1959801
       Component: Tırsteuer.FS BRM 0205  
    
       Subsystem 2 - Part No: 8E1959802E
       Component: Tırsteuer.BF BRM 0205  
    
       Subsystem 3 - Part No: 8E0959801A
       Component: Tırsteuer.HL BRM 0205  
    
       Subsystem 4 - Part No: 8E0959802A
       Component: Tırsteuer.HR BRM 0205  
    
    No fault code found.
    
    End----------(Elapsed Time: 05:51, VBatt start/end: 12.4V/12.3V)-----------

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  13. #19
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    Thank you!!

    So I've taken your collective and well stated counsel and have been making progress bit by bit with much - much help from Jef at Ross-Tech. I wanted to say thanks to all of you in this incredibly helpful community. I'm blown away every single day by the kindness and generosity extended by the people in this forum. My car isn't 100% yet - quite a ways to go for that - but now I actually believe I can get it there with your help. I am indebted to you all. Thanks again.

  14. #20
    Ross-Tech Employee Jef's Avatar
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    3 Faults Found:
    00778 - Steering Angle Sensor (G85)
    37-10 - Faulty - Intermittent
    01826 - Sensor for Steering Angle (G85); Supply Voltage Terminal 30
    35-00 - -
    00778 - Steering Angle Sensor (G85)
    27-00 - Implausible Signal
    Try doing the Steering Angle Sensor (G85) Calibration.

    The 01826, in most cases, doing some figure 8s in a parking lot, then drive down the road a mile or 1, more figure 8s, then drive back and that code can be cleared out.
    Jef
    Ross Tech Support Team, Alpha Squad
    Auto-Scan, learn it, love it, live it... then check the fuses.

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