Selectable Functions (Modes) Under Address Word 33, CARB/OBD II

Mode under address word 33:

Mode 1: Transfer diagnostic data Ignition on, or engine idling
Mode 2: Transfer operating conditions Ignition on, or engine idling
Mode 3: Checking DTC memory Ignition on, or engine idling
Mode 4: Erasing diagnostic information Ignition on, or engine idling
Mode 5: Output of oxygen sensor signals Ignition on, or engine idling
Mode 6: Transferring measured values Ignition on, or engine idling
Mode 7: Checking DTC memory Ignition on, or engine idling
Mode 8: Checking tank system for leaks Ignition on, or engine idling
Mode 9: Reading of vehicle information Allow engine to idle

Mode 1 to mode 9 can be selected under address word 33.

- Individual measured values can be read out under mode 1. Mode 1 is not recommended for the Audi workshop as this data can also be read out in greater detail under address word 01/function 04 or function 08.
- Mode 2 shows the operating conditions under which a malfunction was recognized.
- The DTC memory was checked with mode 3 and erased with mode 4.
- Under mode 5 the static size of the oxygen sensors required by law is shown. As these sizes are not directly related to the oxygen sensor diagnosis, mode 5 is insignificant for the Audi workshop.
- All measured values of components and systems which are not monitored continually can be checked with mode 6.
- Mode 7 can be used to malfunctions where the Malfunction Indicator Light (MIL) has not yet been switched on as the malfunction has not yet been confirmed (MIL is not on, no malfunction under mode 3).
- Mode 8 is used to check the tank for leaks.
- The following vehicle information can be read out with mode 9: VIN, part number and program/data status of engine control module and the check total (this value is an internally calculated value).