EPB issue

[dazzer1975]

Hi guys,

So had an epb error come up on the dash, after acquiring vcds I did the scan below:


VCDS Version: Release 15.7.0 (x64) Running on Windows 8.1 x64
Data version: 20150820
www.Ross-Tech.com (http://www.ross-tech.com/)


Tuesday,25,August,2015,11:36:47:50853


Chassis Type: 3C (3C0)
Scan: 01 03 08 09 15 16 17 19 25 42 44 46 52 53 56 62 72


VIN: WVWZZZ3CZ8E225844 Mileage: 126020km-78305miles


01-Engine -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
25-Immobilizer -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: Malfunction 0010
52-Door Elect, Pass. -- Status: OK 0000
53-Parking Brake -- Status: Malfunction 0010
56-Radio -- Status: OK 0000
62-Door, Rear Left -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000

-------------------------------------------------------------------------------
Address 01: Engine (CBA) Labels: 03L-906-022-CBA.clb
Part No SW: 03L 906 022 FN HW: 03L 907 309
Component: R4 2,0L EDC G000SG 2643
Revision: --H01--- Serial number: VWZCZ000000000
Coding: 0000072
Shop #: WSC 84224 297 673320
VCID: 76E3B6B60101988E7F-8022


No fault code found.
Readiness: 0 0 0 0 0


-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 3C0-614-109-C4.clb
Part No SW: 3C0 614 109 K HW: 3C0 614 109 K
Component: J104 C4 440 V2 0005
Revision: --020--- Serial number: 00000785474829
Coding: 0001291
Shop #: WSC 05311 000 00000
VCID: 2643A6F69121A80E0F-8072


No fault code found.


-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 1K0-820-047.lbl
Part No SW: 1K0 820 047 HN HW: 1K0 820 047 HN
Component: Climatic PQ35 142 1111
Revision: 00142031 Serial number: 00000000000000
Shop #: WSC 00000 000 00000
VCID: 77FDBBB2060BE18664-8022


No fault code found.


-------------------------------------------------------------------------------
Address 09: Cent. Elect. Labels: 3C0-937-049-30-H.lbl
Part No SW: 3C0 937 049 AJ HW: 3C0 937 049 AJ
Component: Bordnetz-SG H54 2202
Revision: 00H54000 Serial number: 01000008245774
Coding: 00888F0700041A00470A00000F000000000859435C00010000 0000000000
Shop #: WSC 05124 000 00000
VCID: 71E985AA686FBFB6AA-8024


Subsystem 1 - Part No: 3C2 955 119 B Labels: 1KX-955-119.CLB
Component: Wischer 180308 022 0601
Coding: 00046997
Shop #: WSC 05124


No fault code found.


-------------------------------------------------------------------------------
Address 15: Airbags Labels: 5N0-959-655.lbl
Part No SW: 5N0 959 655 A HW: 5N0 959 655 A
Component: J234__006 VW10 HI 1815
Revision: 19013000 Serial number: 0039DP6VL0G
Coding: 0012342
Shop #: WSC 05311 000 00000
VCID: 3B7567827AA305E640-806E


Subsystem 1 - Serial number: 6333FTS661430718


Subsystem 2 - Serial number: 6343FTS604940718


Subsystem 3 - Serial number: 6353ETS647SUSVNP


Subsystem 4 - Serial number: 6363ETS6AV5USVNP


Subsystem 5 - Serial number: 00000000000000000


Subsystem 6 - Serial number: 00000000000000000


No fault code found.


-------------------------------------------------------------------------------
Address 16: Steering wheel Labels: 3C0-953-549-SW20.lbl
Part No SW: 3C0 953 549 AE HW: 3C0 953 549 AE
Component: J0527 0020
Revision: 00026000 Serial number: 3C9953507AT
Coding: 0000112
Shop #: WSC 05311 000 00000
VCID: 6FED83D27E5BA946BC-803A


Subsystem 1 - Part No: XXXXXXXXXXX
Component: E0221 002 0010


No fault code found.


-------------------------------------------------------------------------------
Address 17: Instruments Labels: 3C0-920-xxx-17.lbl
Part No SW: 3C0 920 971 E HW: 3C0 920 971 E
Component: KOMBIINSTRUMENT VD1 1216
Revision: V0002000 Serial number: 00000000000000
Coding: 0007405
Shop #: WSC 42850 001 1048576
VCID: 275DABF2962BB10634-8072


No fault code found.


-------------------------------------------------------------------------------
Address 19: CAN Gateway Labels: 3C0-907-530-V2.clb
Part No SW: 3C0 907 530 E HW: 3C0 907 951
Component: J533__Gateway H10 0080
Revision: H10 Serial number: 1200P0841205C3
Coding: F9807F060002022003
Shop #: WSC 05311 000 00000
VCID: 2345BFE2E2135D2668-8076


No fault code found.


-------------------------------------------------------------------------------
Address 25: Immobilizer Labels: 3C0-959-433-25.clb
Part No SW: 3C0 959 433 R HW: 3C0 959 433 R
Component: IMMO 042 0383
Revision: 00042000 Serial number: VWZCZ000000000
Shop #: WSC 131071 1023 2097151
VCID: 39797D8A709F37F652-806C


Subsystem 1 - Part No: 3C0 905 861 G
Component: ELV 027 0380
3C0905861G ELV 027 0380


No fault code found.


-------------------------------------------------------------------------------
Address 42: Door Elect, Driver Labels: 1K0-959-701-MIN3.lbl
Part No SW: 1K0 959 701 P HW: 1K0 959 793 L
Component: J386 TUER-SG FT 1132
Revision: 32008001 Serial number: 00000003588323
Coding: 0000693
Shop #: WSC 05311 000 00000
VCID: 3B7567827AA305E640-806E


No fault code found.


-------------------------------------------------------------------------------
Address 44: Steering Assist Labels: 1Kx-909-14x-44.clb
Part No: 1K2 909 144 M
Component: EPS_ZFLS Kl.134 H08 1901
Shop #: WSC 02069 000 90108
VCID: 366376B64181D88EBF-8062


No fault code found.


-------------------------------------------------------------------------------
Address 46: Central Conv. Labels: 3C0-959-433-46.clb
Part No SW: 3C0 959 433 R HW: 3C0 959 433 R
Component: KSG PQ46 ELV 042 0472
Revision: 00042000 Serial number: VWZCZ000000000
Coding: 0191020051030E763004941570085FCE107C01
Shop #: WSC 05311 000 00000
VCID: 39797D8A709F37F652-806C


Subsystem 1 - Part No: 1K0 951 605 D
Component: LIN BACKUP HORN H08 9001


Subsystem 2 - Part No: 3C0 951 171 C
Component: Neigungssensor 004 0611


Subsystem 3 - Part No: 3C0 951 171 C
Component: Innenraumueberw.004 0611


3 Faults Found:
01135 - Interior Monitoring Sensors
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 4
Fault Frequency: 1
Reset counter: 48
Time Indication: 0


00323 - Vehicle Inclination Sensor (G384)
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 4
Fault Frequency: 1
Reset counter: 48
Mileage: 125020 km
Time Indication: 0
Date: 2015.06.13
Time: 16:44:39


01134 - Alarm Horn (H12)
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 4
Fault Frequency: 1
Reset counter: 48
Mileage: 125020 km
Time Indication: 0
Date: 2015.06.13
Time: 16:44:39




-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. Labels: 1K0-959-702-MIN3.lbl
Part No SW: 1K0 959 702 P HW: 1K0 959 792 L
Component: J387 TUER-SG BT 1132
Revision: 32008001 Serial number: 00000042388326
Coding: 0000692
Shop #: WSC 05311 000 00000
VCID: 3C77649E7FAD02DE49-8068


No fault code found.


-------------------------------------------------------------------------------
Address 53: Parking Brake Labels: 5N0-907-801.clb
Part No SW: 3C0 907 801 J HW: 3C0 907 801 J
Component: J540 EPB3 VW-09393 0009
Revision: 008 Serial number: 00000000420868
Coding: 0000057
Shop #: WSC 05311 000 00000
VCID: 2959ADCA803F877622-807C


3 Faults Found:
03200 - Switch for Electric Parking Brake (E538)
012 - Electrical Fault in Circuit - Intermittent
Freeze Frame:
Fault Status: 00111100
Fault Priority: 1
Fault Frequency: 3
Reset counter: 43
Time Indication: 0


Freeze Frame:
Voltage: 11.70 V
Count: 10
-
Hex Value: 0x0171
Hex Value: 0x0088
Hex Value: 0x1010


02845 - Function Display in Instrument Cluster (!)
007 - Short to Ground - MIL ON
Freeze Frame:
Fault Status: 11100111
Fault Priority: 2
Fault Frequency: 32
Reset counter: 44
Mileage: 125848 km
Time Indication: 0
Date: 2015.08.19
Time: 20:04:01


Freeze Frame:
Voltage: 10.50 V
Count: 78
Speed: 0.0 km/h
Hex Value: 0x1271
Hex Value: 0x0001
Hex Value: 0x1010


02442 - Function Lamp in Control Head
009 - Open or Short to Ground - Intermittent
Freeze Frame:
Fault Status: 00101001
Fault Priority: 2
Fault Frequency: 3
Reset counter: 83
Time Indication: 0


Freeze Frame:
Voltage: 12.10 V
Count: 81
Speed: 0.0 km/h
Hex Value: 0x0871
Hex Value: 0x0008
Hex Value: 0x1010




-------------------------------------------------------------------------------
Address 56: Radio Labels: 1K0-035-1xx-56.lbl
Part No: 1K0 035 186 AD
Component: Radio GR0 034 0033
Revision: 0003404S Serial number: VWZ2Z2H7076732
Coding: 0040400
Shop #: WSC 05314 000 00000
VCID: 68DFE8CE5BB57E7EFD-803C


No fault code found.


-------------------------------------------------------------------------------
Address 62: Door, Rear Left Labels: 1K0-959-703-GEN3.lbl
Part No SW: 1K0 959 703 AB HW: 1K0 959 795 L
Component: J388 TUER-SG HL 0307
Revision: 41004101 Serial number: 00000000326557
Coding: 0000144
Shop #: WSC 05311 000 00000
VCID: 70EF80AE6365B6BEA5-8024


No fault code found.


-------------------------------------------------------------------------------
Address 72: Door, Rear Right Labels: 1K0-959-704-GEN3.lbl
Part No SW: 1K0 959 704 AB HW: 1K0 959 794 L
Component: J389 TUER-SG HR 0307
Revision: 41004101 Serial number: 00000000322858
Coding: 0000144
Shop #: WSC 05311 000 00000
VCID: 71E985AA686FBFB6AA-8024


No fault code found.


End-------------------------(Elapsed Time: 01:37)--------------------------






So, I wasn't too worried about the alarm errors as that could have been me earlier in the year accidently setting alarm off and turning the interior sensors off.... anyway I have just refitted a new vw epb switch, rescanned and cleared the errors.

Turned the ignition on and I am still getting the epb error light come up on the dash and the dis saying to consult handbook etc, so I did a rescan and every error barring this one had disappeared:


Address 53: Parking Brake Labels: 5N0-907-801.clb
Part No SW: 3C0 907 801 J HW: 3C0 907 801 J
Component: J540 EPB3 VW-09393 0009
Revision: 008 Serial number: 00000000420868
Coding: 0000057
Shop #: WSC 05311 000 00000
VCID: 2959ADCA803F877622-807C


1 Fault Found:
02845 - Function Display in Instrument Cluster (!)
007 - Short to Ground - MIL ON
Freeze Frame:
Fault Status: 11100111
Fault Priority: 2
Fault Frequency: 4
Reset counter: 44
Mileage: 126025 km
Time Indication: 0
Date: 2015.08.26
Time: 17:54:53


Freeze Frame:
Voltage: 11.50 V
Count: 78
Speed: 0.0 km/h
Hex Value: 0x1261
Hex Value: 0x0001
Hex Value: 0x1010



So, I went to ross tech error code wiki and discovered this:
02845 - Ross-Tech Wiki (http://wiki.ross-tech.com/wiki/index.php/02845)

02845 - Function Display in Instrument Cluster (!): Short to GroundPossible Symptoms

Malfunction Indicator Light (MIL) ON
Red Brake light or Electro-Mechanical Parking Brake (EPB) light ON
Auto-Hold function in Electro-Mechanical Parking Brake (EPB) disabled

Possible Causes

When found in the Electro-Mechanical Parking Brake (EPB) control module this may be caused to a software problem as noted below.

Possible Solutions

When found in the [53] - Parking Brake control module on the VW Passat (http://wiki.ross-tech.com/wiki/index.php/VW_Passat_(3C)) or VW Passat CC (http://wiki.ross-tech.com/wiki/index.php/VW_Passat_CC_(35)) RoW (Rest of World) vehicles would refer to TPI 2021874








I tried googling TPI 2021874 but it just sent me to a thread on this site about different error codes...but obviously all within the epb module


So, wondering what my next move should be, has anyone any ideas?

Cheers

[DMitch16]

Might need a software update via VAS (VW dealer or independent with VAS diagnostic equipment). VAS is able to connect to the "Mothership" in Germany whereas VCDS cannot.

RichardSEL has a lot of dealings with software updates. Mine was updated at the same time the injectors were replaced under recall.

[dazzer1975]

Might need a software update via VAS (VW dealer or independent with VAS diagnostic equipment). VAS is able to connect to the "Mothership" in Germany whereas VCDS cannot.

RichardSEL has a lot of dealings with software updates. Mine was updated at the same time the injectors were replaced under recall.


Yer im thinking after reading around its software...but, being pessimistic im expecting it to need a new ecu...will ring vw in morning and see if they can reflash....just a bit of a gamble as if it does need a new ecu, then the extra cost of the reflash will be a waste

[RichardSEL]

The re-flash is one hour at an indie. My VW dealer wanted two. But with a CC you shouldn't need it as you've got 3C0 907 801 J. That would've been re-written from manufacture to avoid the "False DTCs" problem (in reality it provided more protection for the switching transistors in the EPB module that had originally been under-rated). But that's in reference to the earlier TPI 2015075 that covers my '06MY B6 Passat. (I can send you that if you PM me again your email address) I have the same module as you, but after the two stage flash on mine ended up at version "GX"

For the TPI 2021874 VW do get very possessive nerdy about their TPIs, especially over here. The only way to be kept uptodate as a lowly member of the public is by subscribing to Erwin. But then you'd only get the NAR ones. There's many US ones for download cultivated by the moderator of VW Vortex forum nater. But his list only goes up to 2009. See:
VWVortex.com - ****Official B6 TSB Thread - Every TSB .pdf is inside!**** (Links work) (http://forums.vwvortex.com/showthread.php?3966208-****Official-B6-TSB-Thread-Every-TSB-pdf-is-inside!****-%28Links-work%29)

To see whether there's a recall outstanding for your car enter your VIN into:
UK: (Safety recalls only) Check for Safety Recalls : Volkswagen UK (http://www.volkswagen.co.uk/owners/recallsSubmit)
NAR (Recalls & Service Lookup):
VW Recalls | Service Campaigns | Volkswagen (http://www.vw.com/content/vwcom/en/owners-recalls.html)

See whether this clears your outstanding EPB fault reporting:

0. Turn parking brake off. EPB button unlit
1. Select control module address [53 - Parking Brake]
2. Select [Basic settings - 04] and use Group 006
3. Listen carefully, and you should hear the EPB close. When it closes you'll see Basic Settings at the top of your screen say "ON"
4. Click [Done], [Go Back] Then [Basic Settings - 04] and use Group 010. This performs a function test on the EPB which will cycle a number of times. When it's done Basic Settings at the top of your screen will show "ON"
5. Click [Done], [Go Back], then [Fault Codes - 02] If each procedure's completed correctly you should see "No Fault Codes Found"
6. Cycle the EPB a few times to ensure all's now working correctly

Post what Module 53 now reads?

Best I can do for now...

[dazzer1975]

Hi Richard,

I am fast becoming aware that you are the 'oracle' lol i bet there is not much you don't know about passats lol

I came across erwin the other night and bookmarked it for if I ever attempted repairs, would be worth a few euros to read through and print off some info

I also found your post about the flashing issue and the modules affected re B and G iirc...I took a little solace from knowing mine isn't one of those specifically affected, but still understand the ecu as being sensitive all the same to low voltages etc etc


I did a recall check via vw site soon after buying the car and again just a few days ago...nothing came up so that is something I suppose lol

Brilliant stuff, many thanks for the suggestion of cycling the functions etc, I will give that a go and report back...at this stage anything that may prevent a very costly repair is always welcome...thank you for the help and suggestions

p.s, i have an estate not a cc...I dont think that will make any difference but just mentioned in case

[dazzer1975]

Hi Richard,

Well, just done the above suggested steps in vcds and immediately hit an issue. Group 6 when inputted and hitting go comes up with error not available, so tried group 10 to do the function test and that worked perfectly, came out ran a scan, cleared the faults, reran the scan after cycling epb on and off via switch a few times and error remains


I have taken a couple of vids to show the procedure and to record the sound of the epb motors cycling on and off...unsure if any use, but they both sound to be cycling on and off fine, yet group 6 non availability would presumably be commensurate with an issue?

Also, unsure if the voltage readings during function test is correct, they were both at 0 (despite unfocused pic but you didn't miss anything) and only registered voltage right at the end...is that normal?



https://youtu.be/7kBP8DMaqp4


Just a vid to relay the sound of the motors cycling on and off via epb switch

Epb motors cycling via epb switch - YouTube (https://youtu.be/IjGHTIQk6-s)


Error code remains unchanged:

Address 53: Parking Brake Labels: 5N0-907-801.clb
Part No SW: 3C0 907 801 J HW: 3C0 907 801 J
Component: J540 EPB3 VW-09393 0009
Revision: 008 Serial number: 00000000420868
Coding: 0000057
Shop #: WSC 05311 000 00000
VCID: 2959ADCA803F877622-807C

1 Fault Found:
02845 - Function Display in Instrument Cluster (!)
007 - Short to Ground - MIL ON
Freeze Frame:
Fault Status: 11100111
Fault Priority: 2
Fault Frequency: 3
Reset counter: 44
Mileage: 126025 km
Time Indication: 0
Date: 2015.08.26
Time: 23:16:59

Freeze Frame:
Voltage: 12.10 V
Count: 78
Speed: 0.0 km/h
Hex Value: 0x1461
Hex Value: 0x0008
Hex Value: 0x1010

[dazzer1975]

Quick update,

managed to find a local-ish indy garage, they are going to do a scan with their gear for 25, they've quoted 450 for epb ecu supply n fit which I thought was quite good, but he didn't seem to think it would be that, more like the motor/calipers...anyway, let them have a look and they can sort it out...can't handle error codes and warning lights, need it sorting

Fingers crossed, they get it sorted first time and its not a case of chase the fault

[RichardSEL]

There's just so much good info, a lot of it spread across may sites on the interweb, that I collect the most useful and sub them into .docs.
Started with headunits (coz I got sold with my '06MY at one year old a sad RCD500 without MP3 or Bluetooth. This on the so-called fully loaded SEL) And it kinda went from there. Still, beats amateur radio or stamp collecting. Must get out more...
Not an oracle or sage. I'll leave that to those who are/have been mechanics and give of their experience in here for free :beerchug:

I'd be surprised if your remaining fault is the EPB module itself. But, if there's been a EPB motor fault for some time, then it's not unknown for it to take down the controller eventually.

As you've now got the full VCDS genuine and registered, try Ross-Tech's own forum? It's a fast track into Ross-Tech's own one-year from purchase free advice centre run from their own server:
Ross-Tech Forums (http://forums.ross-tech.com/forum.php)
There's Ross-Tech's own sponsored public forum at:
VAG-COM Diagnostic Forum (http://forums.vwvortex.com/forumdisplay.php?510-VAG-COM-Diagnostic-Forum)
Both will need your full Autoscan for authentication
Or email:
support@ross-tech.com
I've given them this thread's URL in case they can answer here.

If they don't know the answer to why you're getting nothing in Group 6 then noone will. If you've retracted and opened the EPB several times without lock-up then that does indicate there's no motor fault either. The low voltage you're registering (11.7, 12.1V) could indicate a wiring or plug fault. Have you actually had the wheels off to see whether there's a crack lengthwise along either of the EPB motors? I've given them this thread's URL in case they can answer here.

If you can hang on to your £450 for a little longer, let's see if spending that can be avoided?

[dazzer1975]

Hi Richard,

That degree of organisation can only be praised, it is something I aspire to but doubtful I'd achieve...I think I will start trying myself though, will prove to be a very useful repository of information. LOL Stamp collecting and radio, perhaps you could combine getting out more by going hilltop dx'ing (or whatever the technical name is) lol

The guy I spoke to at the garage sounded taken aback when I mentioned the ecu, he said much more likely to be the motor/caliper

You know, I never even considered asking ross tech for help/further info, good shout, I will register on the forum and see if they can shed any light...and wow, thank you very much for your help and thought to share this thread, that is really very much appreciated, thank you very much Richard.

Yer the fact the brakes engage and disengage every time (upto now fingers crossed and wood touched) is what was pushing me towards the ecu, but of course, as you say, there could be any number of issues along the braking system that perhaps would lead to the issues experienced

I haven't had the wheels off yet, I will take them off over the weekend and see if I can spot any immediately apparent issues with the motors.

Thanks for your help, you have been brilliant

[dazzer1975]

So just to update for anyone else with the same faults:


Dropped car off at garage this morning, they've just rang to say it is the epb ecu that's gone...Might help others pin down the same fault going off the vagcom codes etc

[RichardSEL]

Just seen the useful stuff in Ross-Tech support forum for your fault.

Would suggest you check with VW spares with your VIN to check the replacement cost of your EPB module, and what the latest update version letter is. You're showing currently 3C0 907 801 J

If you're using a VW main agent service dept. their parts are warrantied for a year and the work for two years AFAICR. Get your old module back. There's some places that do repairs on them, so if changeout fixes your issues a repaired module would have some second hand value. I read that:
CHEAP Bosch 5.3 ABS REPAIR VW Passat Audi A4 A6 A8 S4 (http://www.cheapabs.com/)
will also re-build an ABS controller module. Mebe worth an email if you get your old one back?

[dazzer1975]

Hi Richard,

Thanks for your help and info...as usual lol

The car is with an indy vw garage: Bullen Automotive Bury | Bury Car Servicing - Mechanical Repairs - MOT Testing - Tyres & Exhaust Replacement (http://www.bullenauto.co.uk/) not half a mile from the vw dealers I use for servicing but vw pricing for repais scares me (440 for rear caliper unfitted as an e.g.)

Even if the car is done today, which it should be, I can't collect until Friday morning, but will request the old module back, will also run a scan on vcda and see if it all reports back as should do...will try the 006 and 007 group test closing and opening calipers via vcds too...

Bookmarked that site, thank you for the heads up... I have a nagging doubt in the back of my mind that some issue other than the ecu within the braking system is what caused the ecu to fry...I fear, but hope otherwise, that I haven't heard the last from the epb system

[dazzer1975]

Right, just to conclude the thread and hopefully the epb saga...for the time being...

It was the ecu that had failed...no idea why, but all is resolved (for now anyway)

Here are the relevant auto scans pre and post ecu swap

Code:
Address 53: Parking Brake Labels: 5N0-907-801.clb
Part No SW: 3C0 907 801 J HW: 3C0 907 801 J
Component: J540 EPB3 VW-09393 0009
Revision: 008 Serial number: 00000000420868
Coding: 0000057
Shop #: WSC 05311 000 00000
VCID: 2959ADCA803F877622-807C

1 Fault Found:
02845 - Function Display in Instrument Cluster (!)
007 - Short to Ground - MIL ON
Freeze Frame:
Fault Status: 11100111
Fault Priority: 2
Fault Frequency: 4
Reset counter: 44
Mileage: 126025 km
Time Indication: 0
Date: 2015.08.26
Time: 17:54:53

Freeze Frame:
Voltage: 11.50 V
Count: 78
Speed: 0.0 km/h
Hex Value: 0x1261
Hex Value: 0x0001
Hex Value: 0x1010
Post ecu fix:

Code:
Address 53: Parking Brake Labels: 3AA-907-801.clb
Part No SW: 3AA 907 801 J HW: 3AA 907 801 J
Component: J540 EPB4 VW-63206 0012
Revision: H19 Serial number: 00000000565277
Coding: 0021057
Shop #: WSC 05311 210 01865
VCID: 387F788E4B952EFEAD-806C

No fault code found.

[DMitch16]

I'd still be wary of the caliper motors if they have never been changed. If you have the original TRW units with the motor casing design flaw they may eventually crack, let moisture in and slowly start to corrode and seize the motor gearing inside.

[dazzer1975]

oh it is without question im expecting at some point during my ownership of the car the rears will need replacing...I doubt ill be getting rid within the next 7 or so years...if all goes well

[RichardSEL]

The indie has changed your EPB module from:
Part No SW: 3C0 907 801 J HW: 3C0 907 801 J
to
Part No SW: 3AA 907 801 J HW: 3AA 907 801 J
And changed your coding (what functions of this module are switched on or off) from
Coding: 0000057
to
Coding: 0021057

Check that this different module part number is correct for your car via dealer spares and your VIN
I will ask Andy what's been switched on or off with the different coding

Did you get your old module back?
Did you (or they) check your EPB motors for lengthwise crack?

[dazzer1975]

Hi Richard,

I presumed the coding change was down to the gen 4 ecu going in replacing the gen 3 ecu and associated coding?

No I didn't ask for the old ecu, To be fair, the cost of getting it repaired in america then maybe selling for 50 quid when i could use the money to go towards the rear motors/calipers i just thought to leave it...There is a thread on ukpassats on the removal of the rear epb motors and sealing and rectifying any cracks but mine both appear to be in decent undamaged condition. However, knowing what I now do, they will be getting checked regularly


I do though, have at the back of my mind that something caused the ecu to fry...as opposed the ecu just failing on its own accord (which is possible)...in which case, the original fault is still present...but i am a pessimistic worrying type to start with


edit* just found this which explains the coding and is down to the later/newer ecu going in:

VW PASSAT 2.0 TDI 3C 2009 model help how to code EPB module (http://forums.ross-tech.com/showthread.php?901-VW-PASSAT-2-0-TDI-3C-2009-model-help-how-to-code-EPB-module)

I am now engaged in establishing a pissrat specific emergency repair budget, while this fault caught me off guard, it certainly opened my eyes to the costly nature of vw fixes...and the cambelt is due in the next 6 months too :( lol

[RichardSEL]

Yes, it's best practice to note the features switched on in a module before changing. And switch on those features when the module's been changed. Difficulties have been occuring when updating for example CANbus module from "C" to "Q" to cure battery drain issues after updating headunit. Not just copy the code from old module to new
Gen 4 from Gen 3 eh? I must have Gen 0 :nervous:

Did domething happen to cause the EPB module to go faulty (but still report to CANbus) ? As Dana says in that thread, and for my earlier Gen needing a flash update, "they're buggy". If you've got no motor cracks then relax

[dazzer1975]

Far as im aware only coding needed with regards turning on or off is for abs or epb ecu if autohold fitted or not?

I think just swapping the code is sufficient if replacing part number for part number...obviously though if changing to a new/revised/whatever part then the coding will need to be reconfigured....from what i can gather from reading around this issue recently anyway...if my ecu was swapped out like for like old coding for that and abs module would suffice

Nothing happened i can detect... put key in and fault came on dash...completely out of the blue no issues no warnings nothing...was very weird


I still dont understand how the epb could operate ...although tbf the autohold did stop working so that perhaps is where the ecu comes into play?


P.s. have epb motors been known to fail while being externally visually undamaged?...


P.p.s i reviewed my dashcam footage from when the car was in the garage and what stood out of the frankly boring vid was a snippet where the technician speaking to manager said he had never seen it before...ecu failing with no motor issue... so IF it was one of those unfortunate instances of electrickery doodads failing then it must be extremely rare?





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