About Trouble Codes

Automatic vertical headlight aim control system


NOTES:
- All possible malfunctions recognized by the automatic vertical headlight aim control system and printed out by the VAG 1551 Scan Tool (ST) are listed on the following pages according to the 5-digit DTC.
- The 5-digit DTC numbers are only shown on the printout.
- Before replacing a component suspected of malfunctioning, check all related wiring connections, harness connections and Ground (GND) connections according to the appropriate wiring diagram.
- After completing necessary repairs, connect the VAG 1551 scan tool, check DTC memory (scan tool function 02) and, if necessary, erase DTC memory (scan tool function 05)
- DTC memory contains all static and sporadic faults. A malfunction is recognized as static if it exists for at least 2 seconds. If a static malfunction is no longer present after 2 seconds it will be classified as a sporadic malfunction and identified by the letters "ISP" in the lower right of the VAG 1551 scan tool display.
- When the ignition is switched on, all malfunctions present are identified as "sporadic" and are only stored as static malfunctions if they are detected in the next check routine.
- A sporadic malfunction will be erased if it no longer exists after 50 driving cycles (ignition on for at least 5 minutes, road speed above 30 km/h or 18 mph).