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#1 2024-09-08 11:11:37

mickthesick
Member
Registered: 2024-05-17
Posts: 2

Remote central locking stopped working

Hi all,

I've been enjoying the site while lurking in the shadows but now looking for some advice on where to go next with a remote locking issue - 56 reg mk1 ph2 Expert.

Remote was working fine and then over the weekend I noticed reduced range on the fob and then not working at all. Replaced the battery and done the reconnection process from the manual but no luck.

Central locking working on the key in drivers door but don't want to rely on that long term with the locks being as flakey as they are on these

Couldnt see a fuse for remote locking in the manual, unsure if there's anything else DIY style to try next. Any ideas? Thanks smile

Update: I posted this on Mk1 conversion FB group and got some info on wiring up a universal replacement fob but hoping to fix the original, preferably.

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#2 2024-09-08 22:56:43

RegW
Member
From: Bristol
Registered: 2024-04-21
Posts: 178

Re: Remote central locking stopped working

If a key in the drivers door activates the CL I doubt its the fuse
as I don't see a fuse purely for the RF side of the system.
If you want to look, I see fuses F8 and F9 supply unit 8630 the
'passenger compartment protection unit'
I'd have called it the 'central locking control unit' meself but meh, what do I know?

Did you actually test the new battery before fitting it?
IIRC My fob had 2016 cell in there which I managed to replace with a good quality 2032
when I renewed my fob as it has much higher capacity.
Also check you didn't lose the wee transponder chip when you were fiddling, I did that but
luckily noticed it drop on the floor and grabbed it sharpish.
(yeah i know that doesn't unlock the doors, but its easily done)
If the above is ok you may need someone to check the fob is actually transmitting as they can go wrong and the
switches especially will wear out eventually so  I'd be checking those too.

Last edited by RegW (2024-09-08 23:12:19)


When all else fails, RTFM

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#3 2024-09-09 00:21:46

kenbw2
Administrator
From: Preston
Registered: 2017-11-26
Posts: 1,386

Re: Remote central locking stopped working

RegW wrote:

If a key in the drivers door activates the CL I doubt its the fuse
as I don't see a fuse purely for the RF side of the system.

I know it's likely irrelevant but I know my old Peugeot 106 had a fuse for the infra-red CL sensor, that was distinct from the fuse for the CL itself


2000 Citroen Dispatch 1.9TD XUD9 Camper Conversion
1999 Citroen Dispatch 1.9D DW8 Disassembled Camper Conversion
1996 Peugeot 806 1.9TD XUD9 Spare vehicle
1998 Citroen Synergie 1.9TD XUD9 Snapped timing belt

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#4 2024-09-14 07:48:50

mickthesick
Member
Registered: 2024-05-17
Posts: 2

Re: Remote central locking stopped working

RegW wrote:

If a key in the drivers door activates the CL I doubt its the fuse
as I don't see a fuse purely for the RF side of the system.
If you want to look, I see fuses F8 and F9 supply unit 8630 the
'passenger compartment protection unit'
I'd have called it the 'central locking control unit' meself but meh, what do I know?

Did you actually test the new battery before fitting it?
IIRC My fob had 2016 cell in there which I managed to replace with a good quality 2032
when I renewed my fob as it has much higher capacity.
Also check you didn't lose the wee transponder chip when you were fiddling, I did that but
luckily noticed it drop on the floor and grabbed it sharpish.
(yeah i know that doesn't unlock the doors, but its easily done)
If the above is ok you may need someone to check the fob is actually transmitting as they can go wrong and the
switches especially will wear out eventually so  I'd be checking those too.


Thanks for that RegW, checked those fuses as well as fob battery, all good. Also the switches do seem to be causing a voltage drop when activated so as far as I can tell haven't failed. I'll bite the bullet and see if I can get someone to check the signal from the key next

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#5 2024-09-14 19:14:26

RegW
Member
From: Bristol
Registered: 2024-04-21
Posts: 178

Re: Remote central locking stopped working

Here's a weird thing that may work.
Disconnect the battery and wait for a few minutes before reconnecting it
to allow any voltage in PCB caps to drain off.
On some vehicles it has been known to reset the security system and
as its easy to do, worth a try.


When all else fails, RTFM

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#6 2024-09-23 19:41:05

woodbine
Member
From: Bristol, UK
Registered: 2018-11-01
Posts: 260

Re: Remote central locking stopped working

mickthesick wrote:

Replaced the battery and done the reconnection process from the manual but no luck.

Sorry to hijack, but can anyone tell me about the reconnection process please?

Few years ago my key fob stopped working. Tried a new battery, but still nothing. Didn't realise there were poss other steps I should have taken to set up the remote locking.

I've been using the key in the locks for several years now without problems. Is there anything else I should be checking or trying?


Fiat Scudo 2004 (54) 2.0 Jtd SX Dynamic Van

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#7 2024-09-23 23:26:34

Eddie Honda
Member
Registered: 2023-08-27
Posts: 8

Re: Remote central locking stopped working

Handle battery by edges and don't hold it between your thumb and forefinger top & bottom or use plastic tweezers.

Make sure the new battery is good and in date.

Make sure the contacts inside are making contact with the battery securely and the polarity is correct.

Re-sync the key with the car (if you've more than one, you might have to do them in turn in the same session)




It's been a long long time since I done a Peugeot RF key fob as both my more recent PSA vehicles are IR fobbed.

Last edited by Eddie Honda (2024-09-23 23:27:09)

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#8 2024-09-23 23:31:49

kenbw2
Administrator
From: Preston
Registered: 2017-11-26
Posts: 1,386

Re: Remote central locking stopped working

Screenshot-from-2024-09-23-23-30-38.png

Oooh Synergie! Same colour as my one too


2000 Citroen Dispatch 1.9TD XUD9 Camper Conversion
1999 Citroen Dispatch 1.9D DW8 Disassembled Camper Conversion
1996 Peugeot 806 1.9TD XUD9 Spare vehicle
1998 Citroen Synergie 1.9TD XUD9 Snapped timing belt

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#9 2024-09-24 00:59:38

OAT
Member
From: Borders/Dales
Registered: 2017-01-03
Posts: 942

Re: Remote central locking stopped working

kenbw2 wrote:

https://dispatchexpertscudo.org.uk/foru … -30-38.png

Oooh Synergie! Same colour as my one too

The very definition of "synergie"  smile

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#10 2024-09-25 05:04:06

Eddie Honda
Member
Registered: 2023-08-27
Posts: 8

Re: Remote central locking stopped working

kenbw2 wrote:

https://dispatchexpertscudo.org.uk/foru … -30-38.png

Oooh Synergie! Same colour as my one too


Yes, I can't remember what it's previous number plate was, but I think it's ex-Citroen UK. The colour is something like marchioness red pearl metallic. I don't have the code to hand.

Sadly missing its original 3 spoke Monaco alloy wheels.  sad

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