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Old 11th June 2017, 11:41 AM
JulianHicks JulianHicks is offline
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Join Date: Jan 2016
Location: Ashford, Kent
Posts: 246
Question Could I easily adjust the EPB pad thickness? ...

I've had a few quirks on my A8's EPB in recent weeks but I've only just started to have the 'pad alarm' each time I start the car with the following VCDS faults logged after I clear the ECU DTCs.
Code:
-------------------------------------------------------------------------------
Address 53: Parking Brake        Labels: 4E0-910-801.clb
   Part No SW: 4E0 910 801 A    HW: 4E0 907 801 
   Component: EPB  AV1C1010   H01 1010  
   Revision: AV1C1010    
   Coding: 0000221
   Shop #: WSC 13765 210 01865
   VCID: 1D31BE15C4600FAF07-8048

2 Faults Found:
02596 - Rear Brake Pads Worn 
            002 - Lower Limit Exceeded
             Freeze Frame:
                    Fault Status: 01100010
                    Fault Priority: 6
                    Fault Frequency: 6
                    Reset counter: 42
                    Mileage: 367920 km
                    Time Indication: 0
                    Date: 2017.06.05
                    Time: 14:14:55

             Freeze Frame:
                    Voltage: 12.42 V
                    Count: 60

02596 - Rear Brake Pads Worn 
            008 - Implausible Signal
             Freeze Frame:
                    Fault Status: 01111000
                    Fault Priority: 6
                    Fault Frequency: 2
                    Reset counter: 42
                    Mileage: 366704 km
                    Time Indication: 0
                    Date: 2017.04.24
                    Time: 10:03:12

             Freeze Frame:
                    Voltage: 12.63 V
                    Count: 61


-------------------------------------------------------------------------------
The MVBs show a pad thickness of 2mm but the quick visual I did yesterday seems to indicate there's about 5mm!

I suspect the 'pad warning' comes up when the mechanism thinks the pad thickness is below 3mm. For 'economic reasons', I'd like to try and adjust the thickness up to 4mm to give me a few months more before possible replacement. Trouble is, it's not clear how I just do a 'thickness adjust' in isolation on an otherwise working system.

Can I do it 'engine on' as I don't have a battery charger/power supply?
Do I need to open/close manually with lever or electronically with VCDS before trying to adjust?
I've looked at the VCDS Wiki and it's not particularly helpful as to what's needed in what order?

Any advice gratefully received ...

Thanks - Julian
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