Disco 3 (LR3) EPB Problem help required please.

biketeacherdave · Jan 16, 2022

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 · Jan 16, 2022

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

Nodge68 · Jan 16, 2022

terrykl said:
No I only have the iCarsoft Multi-system Scanner i930.

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.

marjon · Jan 16, 2022

Nodge68 said:
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.

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

Nodge68 · Jan 16, 2022

marjon said:
But the OP has had his out repaired so was relatched manually.

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 · Jan 16, 2022

Nodge68 said:
It sounds like a manual re-latch isn't recognised, as its not been through the software.

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

terrykl · Jan 17, 2022

gstuart said:
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

biketeacherdave said:
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 said:
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

biketeacherdave said:
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.

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.

terrykl · Jan 29, 2022

terrykl said:
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.

terrykl · Jan 29, 2022

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?

Nodge68 · Jan 29, 2022

terrykl said:
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.

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.

marjon · Jan 29, 2022

terrykl said:
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?

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.

Nodge68 said:
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.

does that need coding/vin too?

Somebody needs to help JLR someone with sense maybe

J

Nodge68 · Jan 29, 2022

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

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

marjon · Jan 29, 2022

Nodge68 said:
Yes, it's for security, so the VIN and mileage is stored in several modules, including the EPB module.

I understand the need for security but that’s bonkers

J

Nodge68 · Jan 29, 2022

marjon said:
I understand the need for security but that’s bonkers

J

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.

terrykl · Jan 30, 2022

Nodge68 said:
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.

How do you code the replacement module to the vehicle?

Nodge68 · Jan 30, 2022

terrykl said:
How do you code the replacement module to the vehicle?

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

terrykl · Feb 5, 2022

Nodge68 said:
I used my IID, but you can use SDD with a Mongoose interface, and I guess other LR specific diagnostic equipment too.

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.

Disco 3 (LR3) EPB Problem help required please.

biketeacherdave

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