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D3 - Axles, Brakes, Suspension and Steering Brakes, Springs, shocks, steering racks, steering columns, suspension arms, wheel hubs etc. |
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#1
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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 ------------------------------------------------------------------------------- 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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Audi A8 3.0TDi MY2016 in Nautilus Silver. Audi A8 3.0TDI MY2005 in Midnight Blue. Gone since 2018, after 10 years! |
#2
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I would imagine you'd have to do the whole procedure like you were changing the pads, but input your new thickness.
Never tried it though so can't say for sure if it will accept part worn values
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Del |
#3
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Unless the pad sensor wire has come adrift. Happened to Conquistador.
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Current: MY2019.5 Ford Ranger Wildtrak 2.0 BiTurbo A8/S8 - A gap to fill. Multi-Franchise Main Dealer during the day, Amateur vehicle enthusiast by night. |
#4
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As far as I know, it'll accept part worn values. The procedure is on the ross-tech wiki
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2010 Jag XF 3.0D Portfolio S I know.. I know.. |
#5
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I have done this before, yes it works but you need to follow the written procedure for pads change to the letter, not just play around from memory like I did at first which caused even more error codes.
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#6
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Thanks for all your replies Guys.
After trying to work out exactly what had to be done to just adjust pad thickness, I found the Ross-tech Wiki had too little detail. Somewhere else on the web had a more precise process which was basically: 1) Adjust the pad thickness [as per Ross Tech] 2) Then run the Function test [not sure that's explained on Ross Tech clearly]. Not forgetting the 'wait 30 secs' after function text completes. 3) Clear the DTCs This gave me confidence to have a go; however, that didn't work even after 4 attempts! [there's a Ross -tech Video saying you might have to do it several times, but I'm not sure why it would work on a 4th attempt if it didn't work on the first three ]. After that, I still had the same fault codes and the 'yellow' brake alarm in the DIS. As a result decided I needed to spend some money and got my local [non Audi] Audi specialist to put new pads in anyway. No faults now but they would have done the proper Open Caliper, replace Pads, Close Caliper, Thickness Adjust, Function test, etc. As an aside I asked for the old pads; the outer pads [the ones I could see] were 5mm - the inner ones were 2-3mm. And I see from the instructions that pad replacement should be done at 3mm, so they were due anyway. Julian
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Audi A8 3.0TDi MY2016 in Nautilus Silver. Audi A8 3.0TDI MY2005 in Midnight Blue. Gone since 2018, after 10 years! |
#7
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No sensors on the Parking Brake [back] pads on A8s
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Audi A8 3.0TDi MY2016 in Nautilus Silver. Audi A8 3.0TDI MY2005 in Midnight Blue. Gone since 2018, after 10 years! |
#8
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I had the same experience on my D3, the Inner Pads always wore much more than the outer which meant the usual quick visual through the wheel spokes was useless.
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#9
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It might just be due to an incorrect calibration or no calibration being carried out last time they were changed. I had this on a D3 and it nearly caused the rear discs to be toast but they were just saved in time
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Confidence is the feeling you have before you know better . . . . Audi A8 D2 3.7 Quattro Sport 1999 FL - Melange 2nd Place Winner - A8-Freunde Annual German Meet 2012 at Edersee 20" x 9" Bentley GTC Wheels with 385mm W12 Front Discs & Bentley Caliper Covers, Front Lowered on Coilovers, Xenons, Combined DRLs and LED Foglights to modified OEM front fog lamp position, Alcantara/Leather, Full Black Alcantara headlining + pillars and blind shelf, Bespoke Flat Bottomed Sports Steering Wheel, Dark Myrtle Wood, Autodim Mirrors, Bose, Blinds, Digital TV, Ski Hatch, Modified rear exhaust section for extra V8 Burble Audi S8 D2 Final Edition 2002, Avus Silver with Red Leather Interior Tiptronic with Sport mode button, Sony rear entertainment package, Bose sound system, Audi Navigation Plus, 20 inch Final Edition alloys, Full Cat Back Stainless Milltek exhaust, giving a great V8 burble Audi A8L D2 4.2 Petrol with LPG - Ebony Black Audi A8L D4 FL 4.0T Petrol twin turbo - Havana Black Audi A2 1.6 FSi Sport - Dolphin Grey with Votex body kit and Red Leather Interior and some other A8's A8L's and Mercs |
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