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Disco 3 (LR3) EPB Problem help required please.

Discussion in 'Land Rover Discovery' started by terrykl, Jan 9, 2022.

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  1. biketeacherdave

    biketeacherdave Well-Known Member

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    I think you mite need to find a id bluetooth unit then. It has an unlatch function that allows service and replacment of the parking brake. It basically unwinds the cable by reversing the motor.
     
    gstuart likes this.
  2. gstuart

    gstuart D3 Grandad

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    Hi

    out of curiosity how did u set up ur rear shoes plse ,

    ie, can u remember what was the torque rating on the large centre nut and how many clicks did u release the shoes by pls , I’m just wondering if maybe the shoes arnt set up so every time u apply the switch the cables become to tight , force sensor senses that and automatically releases the cable again

    just an idea just in case the shoes weren't released by enough clicks , if u don’t mind sharing what u need as there might be something we see in what u did, plse don’t think I’m trying to teach u how to suck eggs
     
  3. Nodge68

    Nodge68 Well-Known Member

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    The IID has an EPB module re-latch option, the Icarsoft I930 doesn't.
    I'm thinking you need access to be better diagnostic unit, one that has EPB re-latch capability.
     
  4. marjon

    marjon Well-Known Member Full Member

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    the car should go through a relatch itself according to the files I have (l322 if it makes a diff) first pull relatches second applies brake.
    But the OP has had his out repaired so was relatched manually.

    J
     
  5. Nodge68

    Nodge68 Well-Known Member

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    I can't remember about the full re-latch process. I generally just replace the cables if damage, or bin the module, if it gives other trouble.
    I've never had much success fixing them, so don't waste my time on them.
    It's bad enough to install, without the bloody things not working once it's been fitted.

    It sounds like a manual re-latch isn't recognised, as its not been through the software.

    Definitely a better diagnostic device is needed really.
     
    marjon likes this.
  6. marjon

    marjon Well-Known Member Full Member

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    agree.

    Wonder if he pulled the emergency cable with the brake on (cos op can get it on) then let it do itself relatch???

    J
     
  7. terrykl

    terrykl Member

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    I tightened the halfshaft retaining nut to 350 Nm. I adjusted the toothed wheel adjuster up until drum would not move, painted a white dot on one tooth and clicked it out until white dot returned to same position. Drum now turns but not sure what torque is acceptable?? My good neighbour is as mechanic and tested my vehicle with bluetooth unit and found the same C1A53 error. He tried cleared faults then used unlatch function which
    did not work but then nothing else would either. So I still have the C1A53 error.
     
  8. terrykl

    terrykl Member

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  9. terrykl

    terrykl Member

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    Frustration ongoing!
    I bought a actuator unit from a vehicle dismantler but it arrived dripping water so I returned it. Sourced another unit and fitted it.
    Went through the latch up procedure using the EPB switch and the unit appears to have worked leaving the brake on.
    Problem now is I can't release the brake.
    The EPB switch has no response pulling up or pushing down.
    Pulled the emergency release cable and repeated latch up, same problem no switch response.
    No EPB error code found.
    I did find Transfer module going to earth but it still functions!
    Any ideas?
     
  10. Nodge68

    Nodge68 Well-Known Member

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    Have you coded the replacement module to the vehicle?
    The vehicle needs to know the module exists, and has to have a matching VIN, or the EPB won't work.
     
  11. marjon

    marjon Well-Known Member Full Member

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    Please refresh you had the same “no release “ on your old 1. Sounds like switch or the bit in between ( sorry not close to wiring dia) but thought the switch would show a fault if it failed in either direction.

    does that need coding/vin too? :rolleyes: Somebody needs to help JLR someone with sense maybe:eek:

    J
     
  12. Nodge68

    Nodge68 Well-Known Member

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    Yes, it's for security, so the VIN and mileage is stored in several modules, including the EPB module.
     
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  13. marjon

    marjon Well-Known Member Full Member

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    I understand the need for security but that’s bonkers;)

    J
     
  14. Nodge68

    Nodge68 Well-Known Member

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    It's what reduces thefts, at least without the keys. Of course these days, crooks just break into your house to steal the keys, as modern vehicles are virtually impossible to steal without them.
     
  15. terrykl

    terrykl Member

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    How do you code the replacement module to the vehicle?
     
  16. Nodge68

    Nodge68 Well-Known Member

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    I used my IID, but you can use SDD with a Mongoose interface, and I guess other LR specific diagnostic equipment too.
     
  17. terrykl

    terrykl Member

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    Good news my neighbour came and coded the replacement module to the vehicle, it now functions correctly!
    Just bedding in to do and it's back on the road.
    Thanks for everybody's help and suggestions.
     
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