X7 Electric handbrake

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GiveMeABreak
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Re: X7 Electric handbrake

Post by GiveMeABreak » 26 Nov 2018, 13:13

I can only explain what should happen when changing rear pads:
Parking brake is released and diagnostic tool used to put the EPB into 'Removal Position'
Battery disconnected (risk of EPB re-engaging)
Carry out work
Reconnect Battery procedure
Use diagnostic to reconnect EPB, or long pull up on parking brake switch to initialise. Calibration may need to be done afterwards.

There are a multitude of faults that can occur after incorrect operation or otherwise - and the codes I have basically repeat what Lexia is saying in your screenshots.

You must make sure the EPB is not applying itself once the battery is connected back up - hence the need to put the ignition on, foot on brake and then hold down EPB button for 5-10 seconds, then switch off. Then you can try the emergency release. If you are saying it won't release then I'm not sure what has happened.

Remember the ESP controls all functions of the EPB. When there is a fault with the system it will disable all the auto functions - so I would expect it to be reporting the status as shown, plus the car isn't running so half those functions won't be active anyway.

U1219 - which really only tells us what we know in that the data isn't what is expected - that the EPB is not happy as the cables are not set properly.
Click Table to Zoom
X7 U1219.PNG

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Re: X7 Electric handbrake

Post by RichardW » 26 Nov 2018, 13:30

I fear you might have had an expensive day, Steve....

https://www.frenchcarforum.co.uk/forum/ ... =3&t=53941 is similar to yours in that cable pulled in during brake change

https://www.frenchcarforum.co.uk/forum/ ... =3&t=60013 is about someone trying to get replacement cables

Can't see you've got any choice but to get the unit off, and open it up and see what is going on inside....

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Re: X7 Electric handbrake

Post by GiveMeABreak » 26 Nov 2018, 13:47

That's what I think has happened in that the unattached cable has now wound back in and beyond when battery was reconnected when the EPB was reapplied. You can see the internals of the unit in my post that Richard linked to.

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Re: X7 Electric handbrake

Post by Trainman » 26 Nov 2018, 13:53

Damn and Blast it and other such phrases........

Is there a process for the removal? can the cable be released after I get the unit off?

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Re: X7 Electric handbrake

Post by Trainman » 26 Nov 2018, 14:06

I think I've realise where I made a balls of it........ 8-[

I didn't disconnect the battery :oops:

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Re: X7 Electric handbrake

Post by GiveMeABreak » 26 Nov 2018, 14:11

I have the procedures that I can put up (it will take 40 mins or so) - however, I'm not sure what sort of luck others have had as Citroen say:
  • CAUTION: The parking brake cables and the unlock cable cannot be separated from the electrically controlled parking brake unit (FSE).
  • CAUTION: Prohibition on opening the electric parking brake system in after sales. If a malfunctioning of the electric parking brake system is diagnosed, it is necessary to replace it.
So there are no 'repair manuals' for this system apart from the internal workings I have posted. Let me know if you want these - but I fear it will be very much virgin territory once you get in there.

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Re: X7 Electric handbrake

Post by Trainman » 26 Nov 2018, 14:15

great, so basically, it's going to need a new one

i wonder if its actually worth bothering with taking it off

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Re: X7 Electric handbrake

Post by GiveMeABreak » 26 Nov 2018, 14:18

The whole unit with cables is £977.84 inc. VAT, Part No: 1612865480 Steve - unless you can secure a second hand one or are feeling adventurous!

That Citroen advice may just be to the workshop techs - in that they do not provide a repair procedure - so replace unit type of mentality - that's not to say others have not tried a repair though as I'm sure some have.

Also, this video is for a 508 using Diagbox - and this shows the menus to put the EPGB into removal mode at time index 0:39. You can go back and pause it to see the menu steps from the Global Test - and from there into the EPB. You can also see the calibration menu etc.


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Re: X7 Electric handbrake

Post by myglaren » 26 Nov 2018, 14:21

What a nightmare Steve. Hope you can fix without having to replace it.
If the only option is replacement then you can't make it any worse by opening it up for a look.
Fingers crossed.

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Re: X7 Electric handbrake

Post by Trainman » 26 Nov 2018, 15:23

i've watch the video and retrying things, it looks like I have no choice but to remove the handbrake mechanisim from under the car.

is there a removal procedure somewhere?

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Re: X7 Electric handbrake

Post by GiveMeABreak » 26 Nov 2018, 15:24

I take you want this then - you'll have to give me 20-30 mins - I'll try and get this up for you now as I have to go to the vets shortly.

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Re: X7 Electric handbrake

Post by Trainman » 26 Nov 2018, 15:30

no rush, not getting this done tonight

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Re: X7 Electric handbrake

Post by Stickyfinger » 26 Nov 2018, 15:48

There is a guy in Turkey who has worked out how to dissemble the Auto handbrake unit.....I will try and contact him.

Alasdair K Johnston......1 min....tag

Hello Turkey !

Please excuse me using English....

A while ago I noticed a post by one of your members who had worked out how to disassemble (take apart) a C5x7 Auto Handbrake unit.....can anybody show me the link to his work on the unit as I cannot find the correct Turkish terms/word to search the site.

Many thanks friends
Last edited by Stickyfinger on 26 Nov 2018, 15:53, edited 1 time in total.

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Re: X7 Electric handbrake

Post by GiveMeABreak » 26 Nov 2018, 15:50

C5 X7 Electronic Parking Brake Removal Procedure
  • Slacken the parking brake.
  • Raise and support the vehicle, with the rear wheels hanging free.
  • Place the electric parking brake in the removal position; Using a diagnostic tool.
N.B. : In the event of a failure of the electric parking brake or a flat battery, the use of the backup unlock control allows the mechanical release of the electric parking brake.

Disconnect the battery.

BSI Rest / Battery Disconnect / Reconnect Procedure
X7 EPB A.PNG
X7 EPB B.PNG
Remove the glove box (1).
Unclip: The gear lever gaiter (2).
Remove:
  • The centre console fascia trim (3)
  • The oddments tray trim (4)
Pull the handle (5).
Immobilise the electrically controlled parking brake manual unlock cable (6) (at "a"); Using universal pliers .
Uncouple the handle (5) from the electric parking brake manual release cable (6); By means of a screwdriver.
X7 EPB C.PNG
X7 EPB D.PNG
Remove the under body protections (7), (8).Extract the electrically controlled parking brake manual unlock cable (6) from its housing (at "b").
Unclip the electrically controlled parking brake manual unlock cable (6) from the fuel tank (at "c").
X7 EPB E.PNG
X7 EPB F.PNG
On each side:
  • Uncouple the handbrake cable from its housing (7) ( as "d")
  • Unclip the parking brake cable guides (7) (at "e", "f")
  • Remove bolts (8)
  • Release the parking brake cable (7) from the guides
Remove the protector (9).
Disconnect the connector (at "g").
X7 EPB G.PNG
Intentionally Blank
Unscrew the nuts (10).
Remove: The electric secondary brake unit (11).
Intentionally Blank
Refitting

Refit: The electric secondary brake unit (11).
Tighten the nuts (10) to 0,8 ± 0,2 daN.m.
Connect the connector (at "g").
Refit the protector (9).
CAUTION: Respect the routing of the manual unlock cable (6) and of the parking brake cables (7).

On each side:
  • Position: The handbrake cable (7)
  • Clip the guide of the parking brake cable (7) (at "e", "f")
  • Couple the parking brake cable (7) (at "d")
  • Refit bolt (8) ; Tighten to 0,8 ± 0,2 daN.m
Clip the electrically controlled parking brake manual unlock cable (6) to the fuel tank (at "c").
Engage the electrically controlled parking brake manual unlock cable (6) in its housing (at "b").
Immobilise the electrically controlled parking brake manual unlock cable (6) (at "a"); Using universal pliers .
Couple that handle the (5) to the electrically controlled parking brake manual unlock cable (6).

Refit: The underbody protectors (8) and (7).
Return the vehicle to its wheels.

Refit:
  • The oddments tray trim (4)
  • The centre console fascia trim (3)
Clip in place: The gear lever gaiter (2).
Refit: The glove box (1).
Reconnect the battery (follow reconnection procedure).
CAUTION: Before carrying out the handbrake calibration procedure, ensure that the ferrules of the hand brake cables (7) are correctly positioned in the caliper levers (at "d").
  • Carry out the electric parking brake calibration procedure; Using a diagnostic tool.
  • Activate the electric handbrake control.
  • Check the immobilisation of the wheels.

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Re: X7 Electric handbrake

Post by Trainman » 26 Nov 2018, 16:13

Oh that looks like fun 🙄 NOT!!

It can wait until next week, looks like I’m using the Quasqai this week. Thanks to everybody for getting me this far at least, I really do appreciate it, 👋