G3Z
Member Since: 16 Dec 2018
Location: South Wales
Posts: 537
  
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| Strange EPB problems…Help! |
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Morning all.
After endless fault hunting I’ve hit a brick wall with the EPB.
Replaced module off a stripped D4, handbrake cables, shoes, discs, pads etc etc all new. Adjustment procedure all done.
Amber warning light and park brake fault on the dash. Checked the fuse and XYZ (manual D3).
Handbrake only works when the handbrake switch is held up. Will not stay on. It releases itself when you let go of the handbrake switch. All fault codes are U codes and are permanent.
I can only explain the module sounds like a battery drill running out of battery. Starts off fast and then goes really slow toward the end of applying the handbrake. Sounds silky smooth, but slow… as if it’s almost running out of battery at the end (if it were a drill to describe it)
At a bit of a dead end.
Would a wrong shoe adjustment cause U codes?
Thank you in advance. Defender 110 2.4 TDCi Utility Station Wagon.
2007 Disco 3 GS TDV6 Manual
200,000+ mile club 😎
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 22nd Sep 2022 8:34 am |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10359
 
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Don’t D4 have a different can bus speed ?
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| 22nd Sep 2022 8:53 am |
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G3Z
Member Since: 16 Dec 2018
Location: South Wales
Posts: 537
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I’m all ears - happy to learn..   I wasn’t aware of differences in Canbus speeds. Would that explain the U codes? Defender 110 2.4 TDCi Utility Station Wagon.
2007 Disco 3 GS TDV6 Manual
200,000+ mile club 😎
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| 22nd Sep 2022 9:02 am |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10359
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Yeah that would explain U codes.
Maybe someone else can confirm.
But you could check the part numbers of both modules to see if they are the same
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| 22nd Sep 2022 12:34 pm |
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G3Z
Member Since: 16 Dec 2018
Location: South Wales
Posts: 537
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I was hoping you’d give your opinion Mikey.
Thank you for confirming.. 
Back under the car then 
It’s strange how it works with the epb switch works held up though? Defender 110 2.4 TDCi Utility Station Wagon.
2007 Disco 3 GS TDV6 Manual
200,000+ mile club 😎
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| 22nd Sep 2022 4:52 pm |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10359
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I guess it’s a backup emergency mode incase the can bus goes down.
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| 22nd Sep 2022 6:21 pm |
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G3Z
Member Since: 16 Dec 2018
Location: South Wales
Posts: 537
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That makes sense - thanks for the help as usual all. MUCH appreciated!
I will report back once I have fitted a D3 module  Defender 110 2.4 TDCi Utility Station Wagon.
2007 Disco 3 GS TDV6 Manual
200,000+ mile club 😎
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| 22nd Sep 2022 7:10 pm |
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Flatlander
Member Since: 20 Jul 2015
Location: Here
Posts: 575
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What was the problem with your original module? if it was mechanical, you could just swap the control board, which can be done in situ if you unbolt and rotate the module 180deg. on the cables....
The switch connects directly to the module so CAN frame size makes no difference to the switch operation
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| 22nd Sep 2022 8:00 pm |
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