Second-hand Electric stationery brake not recognised

[AinurC5X7]

Thank you for the sharing. I'm living with it, but it's an annoyance especially when doing short trips and the fault comes on. Most of the time the parking brake still functions. However it's irritating that the suspension becomes less compliant with the fault is triggered.

And to think that it works flawlessly again when csr is left for at least 15 minutes, and the fault comes on not from the use of the parking brake but simply from the act of shutting down the engine (whether parking brake is engaged or not).

[AinurC5X7]

I may have a new lead. I've been using diagbox 7.83,and from reading of the forums, it seems that after version 7.62, much of the telecoding functions were removed or hidden, as telecoding moved online.

Just managed to install version 7.62,but haven't got the opportunity to try it yet.

Hoping some telecoding option appears!

[GiveMeABreak]

That is correct, leave it at 7,62

[AinurC5X7]

I notice that just a fraction of a second before the parkbrake fault warning appears on the dash, it clearly shows 'automatic park brake applied' then parkbrake fault.

This happens even when the parkbrake has been applied or the automatic parkbrake application is disabled from the comfort menu.

I suspect the BSI or ESP ECU may be applying the parkbrake a second time.

Perhaps, I can try to disable the auto parkbrake application in the BSI or ESP ECU.

[GiveMeABreak]

There's no option to do this that I can see, short of selecting manual handbrake, then you won't have any brake operating. That's why there is. or was (depending on your BSI software and whether it has been updated or not) the option in the comfort menu for automatic application or not. I always had mine off as I didn't like the resistance when driving off, preferring to manually apply and release as I needed.

[AinurC5X7]

Thanks for the reply. Gone thru diagbox 7.62, more options for manual configuration of BSI and ESP, but nothing specifically to disable automatic activation of the parking brake.

I wonder if I can try keeping the parking brake ECU as 'present' in the BSI but not present in the ESP.

I think unless the replacement parking brake can be coded to allow communication with the ESP ECU, it's still no go.

Wish there was a trick to prevent the waking up of the electronic parking brake automatically.

My BSI is noted to be from 2011, but the EPB ECU is Teves but 2015.

I think one solution would be to update my BSI to the latest version, as I understand that the later versions do not have the option to disable the auto engagement of the EPB when turning off the engine.

I suspect, the newer designed EPB (without the plastic release cable) incorporates the automatic engagement from the EPB ECU without the need for signal from the BSI/ ESP.

That wound explain the double activation of the EPB after shutdown.

If that's the case, I'm wondering, how does one do an update of the BSI?

[GiveMeABreak]

No you can't as the ESP is the controlling ECU - that will throw up more faults.

The BSI software update, apart from removing that option, also removes the Indexing of the rear view mirrors - so if you have that option like I did, then that will no longer work.

[AinurC5X7]

I see.

Interestingly, I may have accidentally stumbled on a workaround.

Was playing with the ignition, and found that once the parkbrake fault has come on, if I turned off the ignition, then waited a few seconds then turned on the ignition, then wait for the dash to show the 'oil level correct' message, and immediately (but before the parkbrake fault has a chance to appear) start the engine. Interestingly, the parkbrake fault does not come on. This is confirmed by pressing the check button, which then says 'no fault'.

I can't be sure if the above is the correct procedure that can be replicated everytime, it's good enough for me. Sure beats having to wait 15 minutes for the fault to disappear.

Will try again tomorrow to get the exact steps right.

[AinurC5X7]

You're probably right. I may be wrong, but it seems to be a common problem ya this 'parkbrake fault' in Peugeot and Citroens?

[GiveMeABreak]

Not very common - never had an issue with mine - and of members in our X7 poll here, only 2% had an EPB issue.

[AinurC5X7]

I did it!

Anyone still keen to find a workaround to this problem?

[AinurC5X7]

This worked for me.

I had suspected that my 2011 BSI is not communicating with the newer designed EPB (TEVES 2015).

Did this last night:
1) Used diagbox 7.58, then went to the fault checking page, cleared all faults (some remained permanent though).

2) Went to BSI, look for vehicle configuration, then disable secondary electronic parking brake. Change it to not present.

3) Go to 'ECU present' tab, look for secondary electronic parking brake and change it to missing.

4) Do a global fault test to make sure no fault in BSI

Result:

1) No more of the parkbrake fault /anti rollback error appearing after ignition shut down.

2) Parking brake light on the trigger button lights up when headlamps are turned on, but the red light never comes on anymore

3) The parking brake works as usual (all the time now, whereas when the parkbrake fault is triggered, the EPB may or may not respond to the trigger button) minus the red light on the button nor any signs of engagement on the dash. Hill start seems to be working I think, or maybe it's the ESP working on the hill start using the brakes)

4) Car no more in safe mode, and suspension is incredibly soft and compliant (becomes stiff otherwise when the parkbrake fault is triggered-just the way I like it!)

Happy days!

[AinurC5X7]

I think the EPB now works without the BSI being it's master. And the trigger button of the EPB, thankfully has direct connection with the EPB ECU, hence why activation and deactivation still works despite the BSI not recognising it's presence (as deleted it the BSI list in the vehicle config and ECUs present).

[AinurC5X7]

Short of getting a recon EPB, perhaps this may allow newer EPBs to be installed, even the much despised so called China copies.

[lenny1972]

Great news. I'm wondering if the hill-holder is still working. Did you try?