On Board Diagnostic,technical data: Equipment
WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2005 Audi allroad, 2004 Audi allroad, 2004 Audi A6, 2003 Audi allroad, and 2003 Audi A6. However, it is still accessible from the selected car via links, so may be relevant.
The advantages of OBD can only be fully exploited by using the vehicle diagnostic, testing and information system VAS5051 or the VAG1551 scan tool, in operating mode 1 "Rapid data transfer."
The DTC memory is equipped with a permanent memory and therefore does not depend on the voltage (power) supply.
The stored malfunctions will be displayed after checking the Diagnostic Trouble Code (DTC) memory. See DIAGNOSTIC TROUBLE CODE (DTC) MEMORY, CHECKING AND ERASING .
After eliminating malfunctions the DTC memory must be erased. See DIAGNOSTIC TROUBLE CODE (DTC) MEMORY, CHECKING AND ERASING .
NOTE:
- Every time the DTC memory is erased and the voltage supply to the Motronic Engine Control Module (ECM) - J220- has been interrupted a new readiness code must be generated. See READINESS CODE, GENERATING .
- The Exhaust Malfunction Indicator Light (MIL) in the instrument cluster will be switched on if the ECM recognizes malfunctions that have an effect (decrease emission values) on exhaust emissions. See EXHAUST MALFUNCTION INDICATOR LIGHT (MIL), SIGNIFICANCE .
- Malfunctions relating to the electronic throttle are also indicated by the Electronic Power Control (EPC) warning light in the instrument cluster.