Old Style Key Pad Immobilizer Removal?

OAT · 2021-12-30 15:45:05

My 1999 model has a key pad immobilizer fitted which is becoming increasingly difficult to use and I want to remove it before it fails altogether and leaves me stranded.

The key pad is in the lower dash pocket to the right of the steering column and has rubberised buttons to enter a 4 digit code. The relevant buttons have shown increasing wear over the years and one in particular is now very tricky to use. I have to poke it vigorously with a pen cap or similar to get it to register.

So I would like to remove the unit but am concerned that there may be complications. Although it is a simple and primitive device, surely they have protected it from merely being removed?

Any advice on taking it out?

Alternately, has anyone got instructions for setting and changing the code?

I could then at least reset it to buttons that have never been used and so should still be reliable.

Casper · 2021-12-30 16:33:07

Some of the early Pug ones it was just a simple case of ignition on. Disarm and take the multiplug out the back. Start engine and that was it.

kenbw2 · 2021-12-30 18:11:48

I know my old Synergie had one of those pads and for reasons I never understood I never had to use it. I was terrified of disconnecting the battery though, which made changing the starter motor a sparky experience.

Yea maybe changing the code is your best bet

Worst case scenario you just destroy the immobiliser part on the fuel pump. Garage job but solves the problem

OAT · 2021-12-30 19:19:19

Casper wrote:

Some of the early Pug ones it was just a simple case of ignition on. Disarm and take the multiplug out the back. Start engine and that was it.

That makes sense. Allowing anyone who knew the code to remove it. And should just plug right back if it doesn't work. I just read though that this is only effective until the battery is removed or goes flat. I may try this after doing a reset.

Have found this too:-

Turn on ignition (dont start engine)
Enter current code (red light goes green)
Press C button once
Enter in new 4 digit code
Press C button again once
New code is now entered and confirmed by 4 beeps
Start engine

NB - Original code retained in memory for 3 turns on of the ignition switch, if new code forgotten re-enter the old one.
After 3 ignition switch operations original code lost and no way back!!
https://www.honestjohn.co.uk/forum/post … tm?t=22208

kenbw2 wrote:

Worst case scenario you just destroy the immobiliser part on the fuel pump. Garage job but solves the problem

https://www.youtube.com/watch?v=3r_H125imwc

Don't fancy this yikes :-

Last edited by OAT (2021-12-30 19:22:50)

JohnDragonMan · 2021-12-30 20:44:57

i know its a bit of a pain but if you have the old XUD engine you can just change the injector pump to the older style single wire type (just feeds with an ignition live). i have done it on a 306. i was going to change the timing belt and water pump anyway. so it did not make the job that much bigger.

Pathfinder100 · 2021-12-30 22:40:21

OAT wrote:

https://www.youtube.com/watch?v=3r_H125imwc
Don't fancy this :-

Seems less of a ball ache than say changing the clutch or gearbox (or practically any job on these vans).

kenbw2 · 2021-12-31 01:57:52

Pathfinder100 wrote:

OAT wrote:
https://www.youtube.com/watch?v=3r_H125imwc
Don't fancy this :-
Seems less of a ball ache than say changing the clutch or gearbox (or practically any job on these vans).

Looks like an easy job as long as you do everything right and don't mess up neutral

I had Diesel Dave do the immobiliser jobby on mine when I swapped Lucas to Bosch

Last edited by kenbw2 (2021-12-31 01:58:46)

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#1 2021-12-30 15:45:05

Old Style Key Pad Immobilizer Removal?

#2 2021-12-30 16:33:07

Re: Old Style Key Pad Immobilizer Removal?

#3 2021-12-30 18:11:48

Re: Old Style Key Pad Immobilizer Removal?

#4 2021-12-30 19:19:19

Re: Old Style Key Pad Immobilizer Removal?

#5 2021-12-30 20:44:57

Re: Old Style Key Pad Immobilizer Removal?

#6 2021-12-30 22:40:21

Re: Old Style Key Pad Immobilizer Removal?

#7 2021-12-31 01:57:52

Re: Old Style Key Pad Immobilizer Removal?

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