Rear Disc replacement -- Brake maintenance Mode

Faults and Technical chat for the Discovery Sport
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Badgerface
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Re: Rear Disc replacement -- Brake maintenance Mode

Post by Badgerface » Wed Dec 05, 2018 6:00 pm

Yes, but they degrade significantly owing to a manufacturing error.
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Comeinhandy
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Re: Rear Disc replacement -- Brake maintenance Mode

Post by Comeinhandy » Wed Dec 05, 2018 6:07 pm

They are all made of steel. Perhaps they may have some impurities in it perhaps that make them rust more. Only guessing. Probably a lot of other cars or aftermarket discs out there made of the same steel.


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Re: Rear Disc replacement -- Brake maintenance Mode

Post by Dashnine » Thu Dec 06, 2018 8:41 pm

Comeinhandy wrote:
Wed Dec 05, 2018 6:07 pm
They are all made of steel. Perhaps they may have some impurities in it perhaps that make them rust more. Only guessing. Probably a lot of other cars or aftermarket discs out there made of the same steel.
But discs don't usually rust on the pad path, they do maybe on the bell or on the outer diameter and the vent holes. It just seems that light, economical braking doesn't shift the beginnings of rust on the disc face and it gets worse and worse until it starts juddering and graunching.

That's the abnormal part, and either it'll just happen again unless I brake like a lunatic every now and again, or the replacement discs are of made of a less likely to rust steel (but I'm no metallurgist). I don't know if this is possible, I assume there are different grades of steel perhaps the replacements are from Sheffield rather than China....
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Re: Rear Disc replacement -- Brake maintenance Mode

Post by BobbyBox » Thu Dec 06, 2018 11:04 pm

Haggis wrote:
Wed Aug 01, 2018 6:57 pm
Hi all
Is there a way to release the electronic handbrake for the fit mechanic.
Disco is on for warranty work at present and also the back brakes but going by other rear brake posts it looks highly unlikely that they will change mine under warranty. I will argue but in the end will do them myself if I get no where.
Thanks
Yes, and you don't need any diagnostic tool or to unplug the EPB servo as has been suggested elsewhere:

2017.0 DISCOVERY SPORT (LC), 206-05
PARKING BRAKE AND ACTUATION
ELECTRONIC PARKING BRAKE
(EPB) SERVICE MODE
ACTIVATION AND
DEACTIVATION

GENERAL PROCEDURES
CAUTIONS:
The electric park brake (EPB) switch apply/release is inhibited
while in this mode (for safety of technicians fingers) so do not
drive the vehicle in this condition. Failure to follow this
instruction may cause personal injury.

This procedure requires the vehicle in the Park or Neutral
position, with the ignition turned ON (the engine must be
OFF) and the parking brake system released.
Once the rear brake pads or brake discs have been installed,
the Service Mode must be cancelled.

ACTIVATION

NOTE:
This procedure allows the parking brake to be released when
removing and installing new rear brake pads or brake discs.

1. Press and hold the parking brake switch in the release
position.
2. Wait one second.
3.Press and hold the accelerator pedal in the wide open throttle
position.
4. Wait one second.
5. Switch the ignition OFF and back ON immediately.

An audible noise will be heard to confirm that the parking brake
has been released in Service Mode.

6. Release the accelerator pedal and release the parking brake
switch to the neutral position.

DEACTIVATION

CAUTION:
This procedure requires the vehicle in the Park or Neutral
position, with the ignition turned ON (the engine must be OFF)
and the parking brake system in Service Mode.

1. Press and hold the parking brake switch in the apply position.
2. Wait one second.
3. Press and hold the accelerator pedal in the wide open throttle
position.
4. Wait one second.
5. Switch the ignition OFF and back ON immediately.

An audible noise will be heard to confirm that the parking brake
has been released from the Service Mode.

6. Release the accelerator pedal and release the parking brake
switch to the neutral position.

As always your success may vary across the model years.

BB
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Re: Rear Disc replacement -- Brake maintenance Mode

Post by Funkster » Sun Jan 13, 2019 10:06 am

Thanks for procedure above. Just tried it on my 15 reg DS. 2.2 engine. Worked a treat. Need to stick to the timings as I had a panic when I couldn't switch off service mode. Tried again with 1 sec between actions and it worked.

Ordered Brembo disks and pads for the rear. Car is out of warranty so no chance of the sorting it. Already had them changed under warranty around 10000miles ago. They just don't last.
Funkster :)

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