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Discussion Starter · #1 ·
I have a new problem. This morning my daughter moved the bug so I could get my truck out of the driveway started right up no issues. Later it starts then dies --immobilizer right? The light in the dash is not on though and when I hook up the scan tool it goes for awhile then says no connection, so I can't get codes. When I put the key in turn it, it does the usual dings then a couple seconds later gives one beep from the instrument cluster. I tried disconnecting the battery and even touched the leads together. I also pulled the cluster to make sure connections were good and checked the wiring at the ignition. At a loss here any ideas?
 

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What year, engine and transmission; is the new beetle? What scan tool, are you using and do you have a aftermarket stereo installed? Have you had any charging problems with this car, lately?

Ross-Tech: VCDS: Afterrmarket Radio Problem
 

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I would recommend that you get it scanned with VCDS (Vag-Com), because some generic OBD-II/III scanners have difficulty communicating.
 

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Discussion Starter · #6 ·
Ok I got my scanner to connect and also tried one from the auto parts store. The only code I got was for the oxygen sensor that's been there for months. I figured out the beep was low fuel so that's gone. There is still no immobilizer light on, I did swap the instrument cluster with another I have and the immobilizer light shows up that one so the wiring between the ignition and dash is good. I'm wondering if it's low fuel pressure or maybe the light in the instrument cluster doesn't work.
 

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Well, a 2002 has the immobilizer III system; did you reprogram the new speedo cluster and do the key matching process? This is usually done with the Ross Tech VCDS. You would need the secret key code (SKC); which requires Vag Tacho to access and get out of the system. This is a somewhat involved; coding and key matching process.If you just swap in a different speedo cluster without doing any programming; the immobilizer will kick on and the car will start for a moment and then die. If you do not have the special tools and knowledge, about doing all the programming involved, repairing your original speedo cluster is probably the way to go and it is just plug/play, repairs complete. One vendor; we have had good results with is BBA REMAN; they offer a lifetime warranty and can repair the speedo cluster. You can find them on ebay and send your cluster into them for rebuilding:

https://www.google.com/search?q=bba...-8#q=ebay+bba+reman+new+beetle+speedo+cluster

The other option; some people, have go with is to eliminate or "delete", the immobilizer out of the ecu. This service, is provided by a number of vendors but Ian @ Reflect Tuning, does this at a affordable price. We have had a number of members do this and they have had positive results. Check it out here:

MK4 1.8T/VR6 ME7 Immobilizer II/III Defeat $50
The purchase of this item is for immo II/III removal from your ecu. Cost of purchase includes return shipping. You must pay to ship your ecu to us.


https://www.google.com/search?q=bba...ie=UTF-8#q=reflect+tuning+mark+iv+immo+delete




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Before, going down; a possible rabbit hole with the speedo cluster (which may not be the problem). I would reinstall the original speedo cluster and start testing for: 1. spark at the spark plug (confirming ignition is working) and 2. using some starting fluid and/or testing for correct fuel pressure. At a basic level; you need fuel and spark; for the car to run. Before, thinking the speedo cluster is the issue; I would try the above basics; to confirm that the ignition and fuel delivery system, are working as they should be. For the spark; removing one spark plug and grounding it; as your turn over the engine, is a quick way to see if there is spark and the ignition system is working.

Here are the service manual testing procedures:

ignition coil testing: (note engine code)

http://workshop-manuals.com/volkswa...esting_and_inspection/with_generic_scan_tool/

http://workshop-manuals.com/volkswa...esting_and_inspection/with_generic_scan_tool/

fuel pump testing:

http://workshop-manuals.com/volkswa...essure_vacuum_and_temperature_specifications/

Also, please; post any trouble codes you are getting; tell the the trouble code (numbers), NOT just the description, thanks.
 

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Discussion Starter · #11 ·
The original speedo is back in it, just did that as a wiring test. I don't think the car will run long enough to check fuel or spark but it does fire up so both are present initially. I think I'll sent the ECU in to have the immobilizer deleted not my favorite VW feature anyway.
 

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Before, sending in your ECU; you need to confirm you are getting spark and correct fuel pressure. Neither of these tests; require, the engine to be running to run the tests. As noted, pull out a spark plug and connect it to the spark plug wire, ground it to something like the head and have someone crank the engine, while you're observing the spark plug.

The fuel pressure; requires, a fuel pressure tester, these can be rented from most auto parts stores like Autozone or purchased from places like Harbor Freight (for as low as $20). Just spraying starter fluid; into the airbox, could be a quick way to do a quick check. You can check the fuel pressure; while someone turns over the engine for you and you observe the fuel pressure gauge, that can confirm it is in spec.

https://www.google.com/search?q=fue...rceid=chrome&ie=UTF-8#q=fuel+pressure+tester+

Do the correct testing; before, shipping out the ecu, which may not be the problem anyway.

What scan tool; are you using? You need a VW specific scan tool, to diagnose VW immobilizer problems. You typically, will get this trouble codes with a immobilizer issue and the immo light will flash.

17978/P1570/005488 - Ross-Tech Wiki

For a VW specific scan tool; check out the VAG 401 or Foxwell NT500 on amazon or the VW factory level VCDS by Ross Tech.

https://www.amazon.com/s/ref=nb_sb_noss?url=search-alias=automotive&field-keywords=vag+401+nt500

http://www.ross-tech.com/

You need to confirm the problem; through testing and reading the codes, before changing things and guessing at what the issue is. It could be something; pretty simple like a bad ignition switch or more in depth like a bad coil, ecu, fault in the immobilizer system or fuel pump, until you troubleshoot the issue, you won't know. We are here to help and do our best, to guide you through your testing and troubleshooting process! Print out the linked to service manual pages; related to the testing procedures and start, working through the testing steps. You can do it! :)
 
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