General Information

Diagnostic Trouble Code (DTC) Table For Headlight Automatic Vertical Aim Control

Instrument Cluster Technology
The Audi A4 instrument cluster is available in two versions; the low-line version with "mini-check" system and the high-line version with an LCD multi-function display.
The mini-check system monitors the brake system, Engine Coolant Temperature (ECT), fuel level and engine oil pressure.
The multi-function display contains the following functions:
- Auto check system with radio station and telephone displays
- Ambient outside temperature display
- On-board computer display
- Transmission Range (TR) selector lever display for automatic transmission
- Navigation

The speedometer contains a LCD display for the odometer, a trip odometer and the Service Reminder Indicator (SRI).
Indicator lamps are integrated in the speedometer and tachometer.
Accessory instruments are integrated into the instrument cluster.
The instrument cluster is controlled by a microprocessor and has extensive On Board Diagnostic (OBD) capabilities. If any component exhibit signs of failure, a Diagnostic Trouble Code (DTC) is stored in the instrument cluster DTC memory. The DTC can then be identified using the VAG1551 or VAG1552 Scan Tool (ST).


NOTE: The descriptions in this Repair Manual reference the VAS5051 Diagnostic Operation Center (DOC) and the VAG1551 Scan Tool (ST).


The following Adaptations (adjustments) can be carried out using the tool:
- Adaptation of the fuel sensor characteristics
- Adaptation of the fuel consumption display
- Coding the language versions for the on-board computer and Auto Check system.
- Adaptation of the Service Reminder Indicator (SRI)
- Adaptation of the odometer after instrument cluster replacement.

Instrument Cluster Replacement Notes
- Do not disassemble the instrument cluster.
- All warning and indicator bulbs can be replaced separately. All other malfunctions require replacing the complete instrument cluster.
- If necessary, the instrument cluster should be exchanged within the parts exchange program.
- Fill in the Failure Description Form and send it in, together with the instrument cluster.
- The instrument cluster must be sent back in its original packaging.
- When replacing the instrument cluster, set the Odometer display and the Service Reminder Indicator (SRI) using the VAG1551 Scan Tool (ST). Programming and Relearning