Diagnostic Trouble Code (DTC) table

NOTE:

All possible malfunctions recognized by the automatic vertical headlight aim control system and printed out by the VAG1551 Scan Tool (ST) are listed on the following sections 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. Refer to "Wiring Diagrams, Troubleshooting & Component Locations" binder.
After completing necessary repairs, connect the VAG1551 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 "/SP" in the lower right of the VAG1551 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).

DTC	Possible causes	Corrective action
VAG 1551 Scan Tool display
00625
Vehicle Speed Signal
Implausible signal	Open circuit or short circuit between instrument cluster and control module.	Check wiring for open circuit or short circuit according to wiring diagram.
00774
Level Control System Sensor, LR-G76
Short circuit to B+	Open circuit or short circuit between left rear level control system sensor -G76- and control module	Check wiring for open circuit or short circuit according to wiring diagram.
Open/short circuit to Ground	-G76- faulty	Replace -G76-.
00776
Level Control System Sensor, LF-G78
Short circuit to B+	Open circuit or short circuit between left front level control system sensor -G78- and control module	Check wiring for open, short circuit according to wiring diagram.
Open/short circuit to Ground	-G78- faulty	Replace -G78-.

DTC	Possible causes	Corrective action
VAG 1551 Scan Tool display
01537
Sender for Veh. Level/Supp. Volt.
Short circuit to B+	Open circuit or short circuit to B+/Ground between control module and vehicle level sensor	Check wiring for open circuit or short circuit according to wiring diagram.
Open/short circuit to Ground
01538
Motors for Beam Adjustment-V48/V49
Short circuit to B+	Short circuit to B+/Ground between left headlight beam adjusting motor -V48-, right headlight beam adjusting motor -V49- and control module	Check wiring for open circuit or, short circuit according to wiring diagram.
Short circuit to Ground	-V48-, -V49- faulty	Replace -V48-, -V49-.
01539
Headlights Not Set	Basic setting 2 (in display group 002) not performed	Perform basic setting. Refer to Basic Setting (function 04) .
65535
Control Module Malfunctioning	Automatic vertical headlight aim control system control module -J431- faulty	Replace control module.