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Immobilizer issue

Tiny
LHOS
  • MEMBER
  • 2002 VOLKSWAGEN PASSAT
  • 1.9L
  • 4 CYL
  • 2WD
  • MANUAL
  • 167,770 MILES
Hi.
Why sometimes when I disconnect battery immobilizer issue go disappear.
I mean which component resets itself in instruments cluster or in other disposition.
Please adapt your response to my car which is listed above 3bg 1.9 tdi 96kw
Regards.
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Saturday, January 27th, 2018 AT 10:28 AM

16 Replies

Tiny
KEN L
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Hello,

This means the immobilizer unit is having a problem and does not keep its memory. This will need to be replaced and programmed by a shop or some can be found online as a kit.

Please let us know what happens.

Cheers, Ken
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Sunday, January 28th, 2018 AT 1:49 PM
Tiny
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Hello,
In my passat the immo unit is included in cluster instruments (ref:8831129924 code barre : 110 080 198/002 ce 0682) it is an immobilizer III. My question is:
What part needs replacement?
Regards.
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Sunday, January 28th, 2018 AT 2:19 PM
Tiny
KEN L
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There are alarm control modules in all of the doors along with a central controller along with a module in the instrument cluster. I have heard of the drivers door module going out.

Lets start by checking the system fuses which there are five.

Here is a guide and the alarm wiring and fuse panel locations to help us get started testing:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

and

https://www.2carpros.com/articles/how-to-check-wiring

Please let us know what you find. We are interested to see what it is.

Cheers, Ken
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Monday, January 29th, 2018 AT 10:45 AM
Tiny
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Hello mr ken, concerning my model of car described above are you sure about this "There are alarm control modules in all of the doors along with a central controller along with a module in the instrument cluster".
From what I read on the net I understood that there is any relation between alarm, door lock system and immobilizer III on vw passat 2002 b5.5.
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Tuesday, January 30th, 2018 AT 9:14 AM
Tiny
KEN L
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Yes the have broken the system up into many controllers not just one centralized unit. You can see by the wiring diagrams how the system is set up. If I had to make a prediction I would say the drivers door module is out because they get the most abuse.
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Tuesday, January 30th, 2018 AT 10:45 AM
Tiny
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By saying yes, you mean that alarm, door lock and immobolizer systems have relationship?.
I said this cause some people think that the Alarm and door lock systems are completly managed by CCM module wich is situated under the driver's seat unlike the immobilizer system wich is situated on cluster instruments.
However you saw right, my car show, from time to time, rear door lock system issue.
Regards.
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Tuesday, January 30th, 2018 AT 11:25 AM
Tiny
KEN L
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Yes you can tell by the wiring diagrams they are all connected the CCM under the drivers seat but the drivers door module goes through the most abuse naturally.
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Wednesday, January 31st, 2018 AT 10:17 AM
Tiny
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Hi Mr ken, let's suppose the folowing hypothesis:
H0: a faulty driver door lock system cause "immobilizer active" issue.
H1: a faulty driver door lock system doesn't cause immobilizer active issue.
If I desconnect driver door lock system and immobilizer active issue disappear then H0 is true, else H1 is true.
H: hypothesis.
Are you ok.
I'll do this and i'll be back.
Regards.
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Thursday, February 1st, 2018 AT 8:50 AM
Tiny
KEN L
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Please do, I am interested to see what it is.
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Friday, February 2nd, 2018 AT 10:12 AM
Tiny
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Hi Mr Ken,
I depose CCM module, I make ignition on then the message "immobilizer active"com on.
I tried to start engine, it start and it shut down after 1 second.
Conclusion H1 hypothesis is true.
Let's chuck image of my experience:
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Saturday, February 3rd, 2018 AT 9:52 PM
Tiny
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By the way, I made a voltage mesurement on pins of green and blue connectors with ignition in on position. Any one can comment plz?
What I have to do in order to upload several imimage in one time
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Saturday, February 3rd, 2018 AT 11:31 PM
Tiny
KEN L
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Are you having problems uploading images? I am not sure what you are asking?
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Sunday, February 4th, 2018 AT 11:40 AM
Tiny
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I have many images to upload at the same time by one click. Can I do that. If yes how
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Sunday, February 4th, 2018 AT 12:08 PM
Tiny
KEN L
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Select an image and press upload. You can upload one at a time is how the system works.
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Sunday, February 4th, 2018 AT 12:21 PM
Tiny
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Ok. I try to test relay n 167 (i suppose that it was designed to command injection pump). I pick up the couvercle the turn ignition on. The relay shut for a moment then it open. Is this normal?
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Sunday, February 4th, 2018 AT 12:41 PM
Tiny
KEN L
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Yes, it sounds like a normal cycle.
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Monday, February 5th, 2018 AT 9:41 AM

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