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Old 21st December 2017, 04:58 PM
snapdragon snapdragon is offline
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Join Date: Nov 2011
Posts: 1,669
Default !!!!Electronic Parking Brake Malfunction!!! Workshop!

It must be that time of the year again.

I replaced the left side connector and caliper with motor over a year ago and did a really good job of the wiring repair, I'm sure it is not that and have tested the pins of the plug that goes into the control module - At the control unit plug, the readings are the same on the left and right and as directly at the caliper plug, so think the wiring and motor are OK.

Attachment 17648 Attachment 17650

For around a month, I had intermittent parking brake error messages
and the left side has had "clamping for not reached" and "implausible pad wear" errors. See screenshot, group 3 is 13A left and over 15A right. 15.0A is the minimum permitted.

Attachment 17647

After lots of playing with VAGCOM, doing adaptations, pad wear recodes, fault code resets, disconnecting the battery, it got worse and sticks on almost every time I disengage it, and I have to turn car off for a few minutes and retry and then so far has been ok. The errors are permanent now.

The control module, and caliper connector were already replaced by Audi under warranty for the original owner in 2007 so the module is a year newer than the car. They made a mess of the connector which is why I had to do it again. As you can see below, the software version is 0230

Attachment 17649

I was wondering if other A8'ers can tell me their SW version from their VCDS scans and the model year of car.
Also, the label on the control module says 023 on it and I wondered if that was to do with factory SW version.

I saw one on ebay that had a 2013 manufacturing date! but the listing was pulled by the seller.


Address 53: Parking Brake Labels: 4E0-910-801.clb
Control Module Part Number: 4E0 910 801 D HW: 4E0 907 801 B
Component and/or Version: EPB A4EC0230 H03 0230
Software Coding: 0000221
Work Shop Code: WSC 00097 210 194805
VCID: 20446925F3957546B1-8075
3 Faults Found:

02432 - Supply Voltage for Left Parking Brake Motor (V282)
011 - Open Circuit - MIL ON
Freeze Frame:
Fault Status: 11111011
Fault Priority: 1
Fault Frequency: 8
Reset counter: 41
Mileage: 415760 km
Time Indication: 0
Date: 2017.12.18
Time: 08:56:39

Freeze Frame:
Voltage: 13.35 V
Count: 116

02596 - Rear Brake Pads Worn
008 - Implausible Signal
Freeze Frame:
Fault Status: 01111000
Fault Priority: 6
Fault Frequency: 2
Reset counter: 37
Time Indication: 0

Freeze Frame:
Voltage: 9.52 V
Count: 61

02428 - Left Parking Brake Motor (V282) Clamping Force Not Reached
000 - - - Intermittent
Freeze Frame:
Fault Status: 00110000
Fault Priority: 4
Fault Frequency: 4
Reset counter: 81
Time Indication: 0

Freeze Frame:
Voltage: 10.87 V
Count: 14

Last edited by snapdragon; 23rd April 2020 at 08:18 AM.
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