Volkswagen Jetta, Golf, GTI 1999, 2000
Electrical Equipment On Board Diagnostic (OBD)
Anti - theft immobilizer On Board Diagnostic (OBD) (Page 01-192)
An unauthorized ignition key is used.
an unauthorized engine control module is detected.
a malfunction is present in the induction coil of anti-theft immobilizer -D2-.
a malfunction is present in the data wiring.
Warning light does not light up when the ignition is switched on if:
the immobilizer control module has detected an authorized key.
the immobilizer control module has not detected an incorrect engine control module.
the immobilizer control module is currently "matching keys" and after matching the
keys no malfunction has occurred.
To troubleshoot, perform the On Board Diagnostic (OBD) program and retrieve the stored
information with either the VAG 1551/1552 Scan Tool or VAS 5051 Vehicle Diagnostic, Testing
and Information System.