Question about Volkswagen Beetle

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Electronic immobilizer Dealer says they have to run a diagnostic to figure out if immobilizer is bad; another $200.00. The battery was dead on the car and they had to charge it to program the new key. The program fell off. So could that be a bad key? Bad immobilizer? Or the battery wasn't charged enough?

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  • 94 Answers

The "immobilizer" isn't just one specific part. It's a combination of parts. ECU, Instrument Panel, Key and a Relay Box. Saying "the immobilizer might be bad" is a sign to me that they have no idea what they are talking about. You'd be much better off taking it to an independent shop that specializes in German cars.

That said, a battery going dead doesn't cause the immobilizer to lose the key programming. HOwever, when you program keys, they must all be done at the same time. You can't add one individually, they have to be done all at once. And yes, you need special equipment to program a key. There is an aftermarket diagnostic equipment called "VCDS" or "VAG COM" that can be used for the same purposes, most independent shops will have one of these. You can also buy one yourself:

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

They have a comprehensive manual explaining the process of programming keys.

Posted on Oct 16, 2013

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Posted on Jan 02, 2017

  • 51 Answers

SOURCE: Battery Charge

The best way is to get a voltmeter and check the voltage of the battery with the truck running and not running. When the truck is running, the voltage across the battery terminals should be aboput 14.9 volts (showing the alternator is charging the battery). With the truck off, the battery voltage should be about 12 volts (showing that the battery is holding the charge). From there, you should be able to tell which is bad.

Posted on Aug 14, 2008

  • 12 Answers

SOURCE: Charging system

change your battery cables and check all wires on the alternator for loose connections, expecially the grounds.

Posted on Oct 12, 2008

BillB-SA
  • 2761 Answers

SOURCE: My 2000 Mercedes Benz S500 is dead- electronic key does not

It's not that unusual for a battery to fail that soon, and the "no lights, no nothing" says that it's the battery again. Your best bet at this point is to pull the battery and take it to the point of purchase for testing. They should either replace it under warranty or charge it for you. After you replace the battery you should have the charging/electrical system checked for possible shorts or power drains.
BillB

Posted on Feb 09, 2010

  • 1 Answer

SOURCE: My key has been getting

make sure shifter is all the way up in park and button is all the way out on shifter and key will come out ...safety issue. this should help.

Posted on Oct 27, 2010

alicantecoli
  • 22095 Answers

SOURCE: Renault Twingo with a key

yes i know what these cars are like ,a right pain in the you know where and the only solution is to calkl a truck and have it taken to the dealer ,its a europeon vehicle and uses encrypted software ,Now on earlier models you still get a spark and the immobilisor only shuts of the fuel pump so if you try running a hot wire direct to the fuel pump it should start anyway ,check for polarity on the sender unit where the fuel pump is ,access can be gained from under teh back seat on this vehicle ,if you do have to have it re-programmed then once its running with teh key cut the thrid wire on the immobilisor reader in the drivers side footwell with teh engine running and then it thinks it still has the key in the ignition .I HATE RENAULTS

Posted on Feb 15, 2011

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1 Answer

My immobilizer has trouble recognizing my key and often won't start the engine. The Honda Dealer says they want to run a $120 diagnostic test. Before I spend that money, what might be the problem?


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Wont start because of anti theft system it used to start for a short time now just turns over


my guess is that you posted all these related posts because you

never read the FSM chapters yet? in immo.>?

read chapter 8Q yet? ill post excerpts, and you can learn how it works?

Guess 2 , you are trying to fix it SCAN tool free? that will never happen, (get one, ? Innova 3160)

Connect the scan tool, crank for 5 seconds, behold , DTC errors

see those. post those and get help, or its all IMPOSSIBLE !!!

yours is KJ 06







Quote:

SENTRY KEY IMMOBILIZER SYSTEM

The Sentry Key Immobilizer System (SKIS) is available as a factory-installed option on this vehicle. Vehicles

equipped with the Vehicle Theft Alarm (VTA) are also equipped with SKIS. The SKIS provides passive vehicle protection

by preventing the engine from operating unless a valid electronically encoded key is detected in the ignition

lock cylinder.

The SKIS includes the following major components, which are described in further detail elsewhere in this service

information:

SENTRY KEY IMMOBILIZER SYSTEM

The Sentry Key Immobilizer System (SKIS) is designed to provide passive protection against unauthorized vehicle

use by disabling the engine after about two seconds of running, whenever any method other than a valid Sentry Key

is used to start the vehicle. The SKIS is considered a passive protection system because it is always active when

the ignition system is energized and does not require any customer intervention. The SKIS uses Radio Frequency

(RF) communication to obtain confirmation that the key in the ignition switch is a valid key for operating the vehicle.

The microprocessor-based SKIS hardware and software also uses electronic messages to communicate with other

electronic modules in the vehicle over the Programmable Communications Interface (PCI) data bus. (Refer to 8 -

ELECTRICAL/ELECTRONIC CONTROL MODULES/COMMUNICATION - OPERATION).

Pre-programmed Sentry Key transponders are provided with the vehicle from the factory. Each Sentry REmote Entry

Module (SKREEM) will recognize a maximum of eight Sentry Keys. If the customer would like additional keys other

than those provided with the vehicle, they may be purchased from any authorized dealer. These additional keys

must be programmed to the SKREEM in the vehicle in order for the system to recognize them as valid keys. This

can be done by the dealer using a diagnostic scan tool or, if Customer Learn programming is an available SKIS

feature in the market where the vehicle was purchased, the customer can program the additional keys, as long as

at least two valid Sentry Keys are already available. (Refer to 8 - ELECTRICAL/VEHICLE THEFT SECURITY -

STANDARD PROCEDURE - TRANSPONDER PROGRAMMING).

The SKREEM performs a self-test of the SKIS each time the ignition switch is turned to the ON position, and will

store fault information in the form of a Diagnostic Trouble Code (DTC) if a system malfunction is detected. The SKIS

can be diagnosed, and any stored DTC can be retrieved using a diagnostic scan tool. Refer to the appropriate

diagnostic information



page 68

SENTRY KEY IMMOBILIZER SYSTEM

WARNING: To avoid personal injury or death, on vehicles equipped with airbags, disable the supplemental

restraint system before attempting any steering wheel, steering column, airbag, occupant classification system,

seat belt tensioner, impact sensor, or instrument panel component diagnosis or service. Disconnect

and isolate the battery negative (ground) cable, then wait two minutes for the system capacitor to discharge

before performing further diagnosis or service. This is the only sure way to disable the supplemental

restraint system. Failure to take the proper precautions could result in accidental airbag deployment.

The hard wired Sentry Key Immobilizer System (SKIS) components and circuits may be diagnosed and tested using

conventional diagnostic tools and procedures. Refer to the appropriate wiring information. The wiring information

includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention,

connector pin-out information and location views for the various wire harness connectors, splices and grounds.

However, conventional diagnostic methods may not prove conclusive in the diagnosis of the Sentry Key REmote

Entry Module (SKREEM), the ElectroMechanical Instrument Cluster (EMIC), the Powertrain Control Module (PCM),

the Programmable Communications Interface (PCI) data bus, or the electronic message inputs used to provide the

electronic features of the SKIS. The most reliable, efficient, and accurate means to diagnose the SKREEM, the

EMIC, the PCM, the CAN data bus, and the electronic message inputs for the SKIS requires the use of a diagnostic

scan tool. Refer to the appropriate diagnostic informatio

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    tdisline_775.jpg


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    tdisline_775.jpg


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