Skoda immobilisor

Mike400 · 11-06-2007, 12:00

Ive posted on here before, but to summarise:

Car turns over but wont start.

Plugs dry.

Guessing it must be immobilisor.

According to handbook, you can disable the immobilisor using some sort of code?

If the immobilisor is faulty will this work? and what do you do?

I dont have the code so im reluctant to pay skoda for the code if it wont work on a faulty immob.

TeflonTom · 11-06-2007, 12:58

are you sure it's the immobilizer??

normally it will fire up and run for a few seconds before the immbilzer cuts it off, i would suggest checking the crank sensor is working first

philje123 · 11-06-2007, 13:16

look at the light on the dashboard... if its flashing steady and quite slow then the imobiliser is active.

There is a button somewhere to disable it if you dont have the remote fob. My button is on the bottom of the gear stick, underneath the gaitor.

Mike400 · 12-06-2007, 20:42

Mines the non-keyfob immobiliser.

Its the one with the transponder in the key

No light on dashboard. Well if there is, ive never seen it lol

Trouble only started after mechanic fitted new clutch, so possibly the crank sensor has got damaged while the gearbox was out?

I know its very hard to diagnose a fault in this way. Mobile mechanics have said they wont waste my time coming out in case its the immobiliser as it would then have to go to Skoda main dealer.

So im very tempted to just go to skoda tomorrow, and buy a crank sensor. And if that doesnt fix it, I guess ive no choice but to get it towed to skoda dealer for them to sort it.

philje123 · 13-06-2007, 10:12

Quote:

Originally Posted by Mike400

Trouble only started after mechanic fitted new clutch, so possibly the crank sensor has got damaged while the gearbox was out?

Yes! this is very possible! If the crank sensor isnt removed before the gearbox is taken off the flyweel shifts slightly and damages the sensor... the same this happened to me when i had my new engine fitted. They didnt remove the sensor and it had a big scrape/chunk out of the bottom.

Just have a look at it... is located on the top of the gear box over the flyweel and is just a case of removing one bolt and just pulls out.

Good luck.

I know where you can get one pretty cheap from btw if your stuck... but i would try and get the money off the mechanic that did it and order new from skoda as they should have known to remove the sensor.

Mike400 · 13-06-2007, 10:31

I took the sensor out last night, no physical damage, looks fine from the outside.

philje123 · 13-06-2007, 13:48

oh... well looks like it isnt the sensor then.

You sure you dont have a keyfob with it? mine has a chip in the key as well as the keyfob.

Does it have central locking?

Mine used to have the skoda alarm system too but was removed by the previous owner... but the functionality of the remote locking/imobiliser remains.

On mine you unlock the doors with the remote and the imobiliser light flashes rapidly then once the key has been turned the light goes off and the car can be started.

You sure its not any other probs? when did this start and was it working ok before.. you done anything/been under bonnet at all that could have triggered the problem?

Mike400 · 13-06-2007, 14:50

No, no central locking or anything like that, pretty basic.

According to handbook there is just the transponder in the key.

No physical damage wouldnt nes. mean its not the crank sensor im thinking.

It had an intermittent starting problem upto now, now it just wont start at all

As the plugs are dry im guessing something is stopping the fuel pump doing its job.

but whether the immob is stopping it (maybe not if you are right teflon tom in that the car should start then cut out) or its the crank sensor, is a mystery

philje123, how much are you looking for that crank sensor? if its cheap and working ill maybe give it a punt, as it would at least cancel that out.

Mike400 · 13-06-2007, 14:52

Oh just to add -

I would leave it with mechanic who done the clutch as it seems too much of a coincidence, but when we got the car back from him we didnt need it for a few weeks, so we really have left it too long to be going back to him

TeflonTom · 14-06-2007, 00:16

just had another thought on this... does the fuel pump run when you try to start it??

you can lift up the rear seat and put your ear to the black cover, you should hear it whiring.... if it is running then it's not the immobilizer, because this cuts off the fuel pump relay

philje123 · 14-06-2007, 06:53

The immobiliser wouldnt allow the car to start at all... at least mine doesnt... if i dont deactivate it the engine just turns over and over without anything happening at all.

And it is true about the crank sensor... doesnt have to have physical damage for it to be knackered... i got mine through a site... you register and then put in your details about your car and what part your after and you get loads of companies ringing you back with prices... got mine for i think £27 inc vat and p&p.

I think in either case of the immobiliser or crank sensor that the fuel pump wouldnt be working as the immobiliser stops it and if the crank sensor isnt telling the ecu that the engine is turning, then it wont bother supplying fuel to it... i think.

TeflonTom · 14-06-2007, 09:01

Quote:

Originally Posted by philje123

I think in either case of the immobiliser or crank sensor that the fuel pump wouldnt be working as the immobiliser stops it and if the crank sensor isnt telling the ecu that the engine is turning, then it wont bother supplying fuel to it... i think.

yeah kinda

if the crank sensor isn't working the fuel pump will run, but you wont get any sparks and the injectors wont work

philje123 · 14-06-2007, 13:01

i see... so if he can find out if the fuel pump is running or not then he'll know for sure if its the immobiliser or sensor... hopefully... lol

TeflonTom · 14-06-2007, 13:13

Quote:

Originally Posted by philje123

i see... so if he can find out if the fuel pump is running or not then he'll know for sure if its the immobiliser or sensor... hopefully... lol

Mike400 · 18-06-2007, 10:21

Thanks again, the knowledge on here is pretty usefull!

Ok

If I connect a test lamp to the connection to the fuel pump I should have an answer there, although I think I already know the answer as I cant hear it when I try and start.

as for the crank sensor, what resistance should it show when the engine is turning over?

So if its the immobilisor, how to deactivate it? The handbook mentions a code, which I dont have (I can get it from skoda?), but how do you enter the code? Is it a sequence of key turns or something?

philje123 · 18-06-2007, 10:29

Quote:

Originally Posted by Mike400

So if its the immobilisor, how to deactivate it? The handbook mentions a code, which I dont have (I can get it from skoda?), but how do you enter the code? Is it a sequence of key turns or something?

I think the code it refers to is the code you need to get another key encoded... which you already have... there should be a button somewhere.... try my suggestion.... lift up the bottom of the gearstick gaitor and have a look in there... mine was attached to the middle of the the gearstick.

Mike400 · 18-06-2007, 12:00

Def no button under the gear gaitor,

Whats the point in having an immob fitted to your car when there is a switch under the gear gaitor? surely something like that would become common knowledge amongst thieves pretty quickly?

Oh the code mentioned in the handbook is referred to as an "immobilser deactivation code"
so i assume its a code you put in using a key sequence in the ignition or something.

My old rover had one, it was something like 4335, and to enter it you turned the key left 4 times, then right 3 times and so on.

11-06-2007, 12:00	#1
Mike400 Briskodian Join Date: Nov 2006 Posts: 19 Thanks: 0 Thanked 0 Times in 0 Posts	Skoda immobilisor Ive posted on here before, but to summarise: Car turns over but wont start. Plugs dry. Guessing it must be immobilisor. According to handbook, you can disable the immobilisor using some sort of code? If the immobilisor is faulty will this work? and what do you do? I dont have the code so im reluctant to pay skoda for the code if it wont work on a faulty immob.

11-06-2007, 12:58	#2
TeflonTom Briskodian Join Date: May 2006 Location: Hayling Island, Hampshire Posts: 7,469 Thanks: 30 Thanked 169 Times in 145 Posts	Re: Skoda immobilisor are you sure it's the immobilizer?? normally it will fire up and run for a few seconds before the immbilzer cuts it off, i would suggest checking the crank sensor is working first __________________

11-06-2007, 13:16	#3
philje123 Nelly the Felly Join Date: Feb 2007 Location: York Posts: 1,583 Thanks: 44 Thanked 78 Times in 74 Posts	Re: Skoda immobilisor look at the light on the dashboard... if its flashing steady and quite slow then the imobiliser is active. There is a button somewhere to disable it if you dont have the remote fob. My button is on the bottom of the gear stick, underneath the gaitor.

12-06-2007, 20:42	#4
Mike400 Briskodian Join Date: Nov 2006 Posts: 19 Thanks: 0 Thanked 0 Times in 0 Posts	Re: Skoda immobilisor Mines the non-keyfob immobiliser. Its the one with the transponder in the key No light on dashboard. Well if there is, ive never seen it lol Trouble only started after mechanic fitted new clutch, so possibly the crank sensor has got damaged while the gearbox was out? I know its very hard to diagnose a fault in this way. Mobile mechanics have said they wont waste my time coming out in case its the immobiliser as it would then have to go to Skoda main dealer. So im very tempted to just go to skoda tomorrow, and buy a crank sensor. And if that doesnt fix it, I guess ive no choice but to get it towed to skoda dealer for them to sort it.

13-06-2007, 10:31	#6
Mike400 Briskodian Join Date: Nov 2006 Posts: 19 Thanks: 0 Thanked 0 Times in 0 Posts	Re: Skoda immobilisor I took the sensor out last night, no physical damage, looks fine from the outside.

13-06-2007, 13:48	#7
philje123 Nelly the Felly Join Date: Feb 2007 Location: York Posts: 1,583 Thanks: 44 Thanked 78 Times in 74 Posts	Re: Skoda immobilisor oh... well looks like it isnt the sensor then. You sure you dont have a keyfob with it? mine has a chip in the key as well as the keyfob. Does it have central locking? Mine used to have the skoda alarm system too but was removed by the previous owner... but the functionality of the remote locking/imobiliser remains. On mine you unlock the doors with the remote and the imobiliser light flashes rapidly then once the key has been turned the light goes off and the car can be started. You sure its not any other probs? when did this start and was it working ok before.. you done anything/been under bonnet at all that could have triggered the problem?

13-06-2007, 14:50	#8
Mike400 Briskodian Join Date: Nov 2006 Posts: 19 Thanks: 0 Thanked 0 Times in 0 Posts	Re: Skoda immobilisor No, no central locking or anything like that, pretty basic. According to handbook there is just the transponder in the key. No physical damage wouldnt nes. mean its not the crank sensor im thinking. It had an intermittent starting problem upto now, now it just wont start at all As the plugs are dry im guessing something is stopping the fuel pump doing its job. but whether the immob is stopping it (maybe not if you are right teflon tom in that the car should start then cut out) or its the crank sensor, is a mystery philje123, how much are you looking for that crank sensor? if its cheap and working ill maybe give it a punt, as it would at least cancel that out.

13-06-2007, 14:52	#9
Mike400 Briskodian Join Date: Nov 2006 Posts: 19 Thanks: 0 Thanked 0 Times in 0 Posts	Re: Skoda immobilisor Oh just to add - I would leave it with mechanic who done the clutch as it seems too much of a coincidence, but when we got the car back from him we didnt need it for a few weeks, so we really have left it too long to be going back to him

14-06-2007, 00:16	#10
TeflonTom Briskodian Join Date: May 2006 Location: Hayling Island, Hampshire Posts: 7,469 Thanks: 30 Thanked 169 Times in 145 Posts	Re: Skoda immobilisor just had another thought on this... does the fuel pump run when you try to start it?? you can lift up the rear seat and put your ear to the black cover, you should hear it whiring.... if it is running then it's not the immobilizer, because this cuts off the fuel pump relay __________________

14-06-2007, 06:53	#11
philje123 Nelly the Felly Join Date: Feb 2007 Location: York Posts: 1,583 Thanks: 44 Thanked 78 Times in 74 Posts	Re: Skoda immobilisor The immobiliser wouldnt allow the car to start at all... at least mine doesnt... if i dont deactivate it the engine just turns over and over without anything happening at all. And it is true about the crank sensor... doesnt have to have physical damage for it to be knackered... i got mine through a site... you register and then put in your details about your car and what part your after and you get loads of companies ringing you back with prices... got mine for i think £27 inc vat and p&p. I think in either case of the immobiliser or crank sensor that the fuel pump wouldnt be working as the immobiliser stops it and if the crank sensor isnt telling the ecu that the engine is turning, then it wont bother supplying fuel to it... i think.

14-06-2007, 13:01	#13
philje123 Nelly the Felly Join Date: Feb 2007 Location: York Posts: 1,583 Thanks: 44 Thanked 78 Times in 74 Posts	Re: Skoda immobilisor i see... so if he can find out if the fuel pump is running or not then he'll know for sure if its the immobiliser or sensor... hopefully... lol

18-06-2007, 10:21	#15
Mike400 Briskodian Join Date: Nov 2006 Posts: 19 Thanks: 0 Thanked 0 Times in 0 Posts	Re: Skoda immobilisor Thanks again, the knowledge on here is pretty usefull! Ok If I connect a test lamp to the connection to the fuel pump I should have an answer there, although I think I already know the answer as I cant hear it when I try and start. as for the crank sensor, what resistance should it show when the engine is turning over? So if its the immobilisor, how to deactivate it? The handbook mentions a code, which I dont have (I can get it from skoda?), but how do you enter the code? Is it a sequence of key turns or something?

18-06-2007, 12:00	#17
Mike400 Briskodian Join Date: Nov 2006 Posts: 19 Thanks: 0 Thanked 0 Times in 0 Posts	Re: Skoda immobilisor Def no button under the gear gaitor, Whats the point in having an immob fitted to your car when there is a switch under the gear gaitor? surely something like that would become common knowledge amongst thieves pretty quickly? Oh the code mentioned in the handbook is referred to as an "immobilser deactivation code" so i assume its a code you put in using a key sequence in the ignition or something. My old rover had one, it was something like 4335, and to enter it you turned the key left 4 times, then right 3 times and so on.

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