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Thread: Parking Brake Switch Faults

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  1. Parking Brake Switch Faults 
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    Grateful for any Help, Comment or Views,

    Last night on my way home after starting my car and driving off from a steep hill, the Parking light Warning light started and the parking brake fails to operate. I did stop and tried to reset them to no avail and called out the AA. The mechanic was very helpful and check that the rear wheels were not binding and diagnosed the problem as likely to be the Parking Brake Button Electrical Button faults in the electrical circuit, he gave a Fault code of P098B. This code came from the Bosch diagnostic system he used. I understand that parking switch faults are fairly common as drinks often get spilt on the console? I have looked for this fault code but it does not appear on the Ross-Tech site and very limited information on the WWW, so any Ideas where I can get more information?
    Today I have checked all the fuses and they are OK and done a hardware reset ( removed the battery earth lease for a few seconds), but no change to fault conditions.
    I connected up VCDS and did a brake Caliper test under module 53 and that passed and the brake servos motors worked? However, the following code we highlighted:-

    -------------------------------------------------------------------------------
    Address 01: Engine Labels: 03G-906-016-BLB.clb
    Part No SW: 03G 906 016 MH HW: 03G 906 016 MH
    Component: R4 2,0L EDC G000SG 1144
    Revision: --H06--- Serial number:
    Coding: 0000072
    Shop #: WSC 02325 785 00200
    VCID: 75E791961CB65CB6B75-8020

    1 Fault Found:
    006215 - Please check DTC Memory of ABS Controller
    P1847 - 000 -
    Freeze Frame:
    Fault Status: 01100000
    Fault Priority: 6
    Fault Frequency: 2
    Reset counter: 255
    Mileage: 251410 km
    Time Indication: 0
    Date: 2021.10.06
    Time: 11:49:06

    Freeze Frame:
    RPM: 0 /min
    Speed: 0.0 km/h
    Load: 0.0 %
    Voltage: 11.86 V
    Bin. Bits: 00001000
    Torque: 0.0 Nm
    Bin. Bits: 00000100

    Readiness: 0 0 1 1 1

    -------------------------------------------------------------------------------
    Address 03: ABS Brakes Labels: 4F0-910-517.lbl
    Part No SW: 4F0 910 517 AC HW: 4F0 614 517 T
    Component: ESP8 front H01 0070
    Revision: 00000000 Serial number: 00000000000000
    Coding: 0020855
    Shop #: WSC 02325 785 00200
    VCID: 65C7C1D6AC16AC36075-8030

    1 Fault Found:
    00473 - Control Module for Elect. Park/Hand Brake (J540)
    013 - Check DTC Memory
    Freeze Frame:
    Fault Status: 01101101
    Fault Priority: 3
    Fault Frequency: 1
    Reset counter: 3
    Mileage: 251410 km
    Time Indication: 0
    Date: 2021.10.06
    Time: 11:54:46

    Freeze Frame:
    Hex Value: 0x0000
    Hex Value: 0x02A2
    Hex Value: 0x0035
    Hex Value: 0x0190
    Hex Value: 0x00FF


    -------------------------------------------------------------------------------
    Address 53: Parking Brake Labels: 4F0-910-801.clb
    Part No SW: 4F0 910 801 C HW: 4F0 907 801 A
    Component: EPB CDEC0080 H04 0080
    Revision: --H04---
    Coding: 0000111
    Shop #: WSC 02145 785 00200
    VCID: 204990C2F3B4891EB43-8075

    2 Faults Found:
    01087 - Basic Setting Not Performed
    000 - - - MIL ON
    Freeze Frame:
    Fault Status: 11100000
    Fault Priority: 4
    Fault Frequency: 6
    Reset counter: 3
    Mileage: 251408 km
    Time Indication: 0
    Date: 2021.10.06
    Time: 11:07:13

    Freeze Frame:
    Voltage: 12.84 V
    Count: 170

    02443 - Control Head
    012 - Electrical Fault in Circuit - MIL ON
    Freeze Frame:
    Fault Status: 11101100
    Fault Priority: 2
    Fault Frequency: 26
    Reset counter: 0
    Time Indication: 0
    Date: 2064.00.00
    Time: 00:00:00

    Freeze Frame:
    Voltage: 10.97 V
    Count: 40


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

    My next step is to order a Parking Brake switch which is going to be a bit of a faff to fit, so in the meantime, I thought I would ask if anybody has had a similar problems with their parking Brake? So I would be grateful for any Help, Comments or Views,

    BR,


    Oobals
     
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  2. Re: Parking Brake Switch Faults 
    #2
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    01087 - Basic Setting Not Performed - I haven't been there done that but from this error i would try a re-learn, as if you had changed pads. it might get you away but there must be something else up for it to forget its settings?
    Stewart
    2007 A6 quattro 3.0 TDI Manual
    1986 coupe quattro (kv) square wheels.
    1972 mini 1400 100BHP A series
     
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  3. Re: Parking Brake Switch Faults 
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    Dear All,

    I replaced the Parking brake switch, but be warned that A6 C6 parking switch 4F2927225A is for lefthand drive cars, but mine is righthand drive and needed 4F2927225B. Alas, I did not read the small print and ordered the A version. However, with minor modifications to the bottom of the old button lever, I swapped the parts to get the correct curvature profile on the MMI console. It took quite a bit of work to clear the fault codes and reset the parking brake with the VCDS, but all fault code cleared and the parking brake reset and work fine now! it took a few hours to do as there is a lot of trim to remove and put back on the central MMI console.

    BR,

    Oobals

     
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