| Immobilizer self-diagnosis |
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| In Germany the “online request with GeKo-SEAT” replaces the request of the 7 character PIN as of 01.07.2004. |
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| In other countries the “online request” replaces the request of the 7 character PIN as of 01.10.2004. |
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| Immobilizer self-diagnosis is now only possible with vehicle diagnosis, testing and information system -VAS 5051A- or the vehicle diagnosis and service information system -VAS 5052-. |
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| Not all self-diagnosis functions are possible due to the change-over to “online request with GeKo-SEAT”. |
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| Overview of functions available in self-diagnosis → Chapter. |
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| The functions which are no longer possible on vehicles up to 05.00 are replaced by the programmes in “Guided functions”. |
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| The functions which are no longer possible on vehicles as of 06.00 are replaced by the programmes in “Guided fault finding” and “Guided functions”. |
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| The “Guided fault finding” replaces the “Self-diagnosis” on vehicles after 06.00. |
| Up to 08.97: a first generation immobilizer is installed in the Alhambra. |
| Communications between the immobilizer control unit and the engine control unit take place on the W-wire. |
| From 09.97 to 05.00 a second generation immobilizer is installed in the Alhambra. |
| Communications between the immobilizer control unit and the engine control unit take place on the W-wire. |
| From 06.00 a third generation immobilizer is installed in the Alhambra, one of two versions is installed depending on the type of engine. |
| On one version the immobilizer control unit and engine control unit communicate with one another via the data bus, on the other version this communication is via W-wire. |
| The corresponding communication method should be determined beforehand using the display group 001 → Anchor via the “Read data block” function → Chapter. |
| Communications are implemented via the W-wire if the first display zone contains the Baud rate in the form of a number. |
| The text “data bus” means the communication is via data bus. |
| The immobilizer consist of: |
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| an immobilizer control unit, |
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| an adapted (matched) engine control unit, |
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| a reader coil on ignition lock, |
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| adapted (matched) ignition keys with electronic components (transponder and response reader memory), |
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| and the immobilizer warning lamp -K117-. |
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