Immobilizer, troubleshooting procedure: Malfunction:

WARNING: This page does not describe the selected car, but rather 27 other vehicles, including the 2002 Volkswagen Cabrio, 2001 Volkswagen Cabrio, 2000 Volkswagen Cabrio, 1999 Volkswagen Jetta, and 1999 Volkswagen Golf. However, it is still accessible from the selected car via links, so may be relevant.

Engine does not start

When started, engine starts and then switches off after approx. 1 second.

Connect VAG1551 Scan Tool (ST) and initiate On Board Diagnostic (OBD).
Select Engine Control Module (ECM) using address word 01.
Check DTC memory (function 02).

Key adaptation malfunctioning or incorrect

DTC 01179 "Key programming incorrect" is stored in DTC memory of control module for anti - theft immobilizer.

Select control module for anti -theft immobilizer using address word 25.

Example of indication on display:

Fig 1: Identifying VAG 1551 Scan Tool Display (Cabrio From May 1999 - Malfunction)

Courtesy of VOLKSWAGEN OF AMERICA, INC.

Compare 14-digit identification number indicated at right in display with identification number on key chain.
NOTE: If the two identification numbers do not match, use the identification number indicated in the display to acquire the relevant secret number from the responsible distributor or importer.
Adapt all keys after entering the correct secret number. See IGNITION KEYS, MATCHING (ADAPTATION) .