Electrical Issues, This Is Impossible (i Think?)

[Muesli Camel]

Hi clever helpfull people,

 

further to my last post re the Sharan I have bought that is a non runner, the windows are working as is most of the central locking, I have looked under the passenger seat to check the control box and it is missing.

 

The wires are there that plug into it as is the relay (does anyone know what this relay is for) but no control box.

 

It is a 96 model so this is where it should be but its not!

 

The car turns over fine but doesn't fire, are they linked?

 

I have checked the function of the fuses and solenoids and all are ok.

 

How is it possible that the windows & locking work with no control box?

 

Can anyone of you brainiacs shed some light?

 

Thanks for reading my ramblings this far!

 

MC

[Mirez]

The windows are all wired direct hence why they work, the module you are missing is described as the "Anti-theft" module (anyone else see the irony there? lol) and controls the global opening/closing, remote and double door locking and the alarm. The PATS immobiliser seems to be an independant module located up behind the dash so the missing module shouldn't be inhibiting start.

 

I'd hazzard a guess though, the relay you are on about thats also missing... its not the interia switch that some fools removed? That lives down there as well and looks like a gold box with red button, it detects big impacts (crash) and cuts the fuel supply - if its been removed then again, no fuel will flow.

Edited February 13, 2010 by Mirez

[Muesli Camel]

The windows are all wired direct hence why they work, the module you are missing is described as the "Anti-theft" module (anyone else see the irony there? lol) and controls the global opening/closing, remote and double door locking and the alarm. The PATS immobiliser seems to be an independant module located up behind the dash so the missing module shouldn't be inhibiting start.

 

I'd hazzard a guess though, the relay you are on about thats also missing... its not the interia switch that some fools removed? That lives down there as well and looks like a gold box with red button, it detects big impacts (crash) and cuts the fuel supply - if its been removed then again, no fuel will flow.

 

Hi, thanks for you message,

 

The relay is still there and from memory has no 78 on it, the box that is missing that I have seen on other models has 2 or 3 plugs going into it and is the alarm box thing.

 

If this is missing will it explain why the car does not start but turns over freely enough?

[big_kev]

I think when the history of the car is suspect ( ie you don't know what bits have been removed ).

 

Then it would be easiest to use VagCom (or similar ) to diagnose the fault.

 

You could be chasing your tail for a long time if there are multiple faults.

 

Diagnostics would allow you to easily locate the faults.

[zorgman]

right then, the relay controls the rear hatch door nothing else, the inertia switch has a button on top press it in to check it infact you can short it out to test it, theres 2 types of units fitted called comfort control a 2 plug and 3 plug the 2 plug has no alarm the 3 plug has an alarm.

you need to check the basic items first have you a spark (only petrol models have the cut off switch) have you got petrol flowing by memory theres a valve like a tyre valve you can press in to check this

[Muesli Camel]

right then, the relay controls the rear hatch door nothing else, the inertia switch has a button on top press it in to check it infact you can short it out to test it, theres 2 types of units fitted called comfort control a 2 plug and 3 plug the 2 plug has no alarm the 3 plug has an alarm.

you need to check the basic items first have you a spark (only petrol models have the cut off switch) have you got petrol flowing by memory theres a valve like a tyre valve you can press in to check this

 

thanks I will check, Ihave vagcom and whilst it finds the car it says cannot communicate or something similar when I do a manual search.

[Muesli Camel]

right then, the relay controls the rear hatch door nothing else, the inertia switch has a button on top press it in to check it infact you can short it out to test it, theres 2 types of units fitted called comfort control a 2 plug and 3 plug the 2 plug has no alarm the 3 plug has an alarm.

you need to check the basic items first have you a spark (only petrol models have the cut off switch) have you got petrol flowing by memory theres a valve like a tyre valve you can press in to check this

 

thanks I will check, Ihave vagcom and whilst it finds the car it says cannot communicate or something similar when I do a manual search.

 

Right, further to the above, what I know about the car is that it worked well until the passenger footwell did its thing with a blocked drain and now it does not run.

 

Some bright spark has removed the box under the seat which is how I bought it.

 

I have checked the car over and there is no spark, will the lack of the box under the seat cause this or not?

 

Under the passenger seat there is the missing box and the 2 wires that run to it and that is all.

 

Anyone got any ideas?

 

Thanks for you time and wisdom,

 

MC

Edited February 14, 2010 by Muesli Camel

[zorgman]

hi

it should run without the box on the door there is a led does it flash at you when you turn ign on (not sure if it will do owt without box).

i would go thru checking all plugs under the bonnet, what engine is in it as im still non the wiser without knowing that

[big_kev]

thanks I will check, Ihave vagcom and whilst it finds the car it says cannot communicate or something similar when I do a manual search.

 

Try using vagcom to speak to the engine controller ( Module 01 ).

 

Hopefully the engine ECU has not been removed.

 

Also can you confirm that it is a manual gearbox ?

[zorgman]

just for knowledge the ecu is behind the clocks, sod of a job to get out if you dont have the knack of it, seems funny your vagcom is not picking car up have you got the ign turned on with lights shown on dash ie alt light

[Muesli Camel]

just for knowledge the ecu is behind the clocks, sod of a job to get out if you dont have the knack of it, seems funny your vagcom is not picking car up have you got the ign turned on with lights shown on dash ie alt light

 

Hi all,

 

it is the 1984cc VW engine with a manual gearbox, I cannot get the vagcom to talk to it, the system connects but doesn't find the boxes.

 

As this is the vw version, I am told it doesn't have the PATS system so am at a bit of a loss where the immobiliser fits in to the whole picture.

 

thanks,

 

MC