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

On Board Diagnostic (OBD), Technical Data

Address Words:
Address word 00: Automatic Test Sequence - Ignition switched on -or- Engine running at idle
Address word 01: Engine Electronics - Ignition switched on -or- Engine running at idle
Address word 33: OBD II (generic scan tool) - Ignition switched on -or- Engine running at idle

Modes Under Address Word 33:
Mode 1: Transfer diagnostic data Ignition switched on -or- Engine running at idle
Mode 2: Transfer operating conditions Ignition switched on -or- Engine running at idle
Mode 3: Check DTC memory Ignition switched on -or- Engine running at idle
Mode 4: Erase diagnosis information Ignition switched on -or- Engine running at idle
Mode 5: Output of HO2S signals Ignition switched on -or- Engine running at idle
Mode 6: Transfer measuring values Ignition switched on -or- Engine running at idle
Mode 7: Check DTC memory Ignition switched on -or- Engine running at idle

- Under Address word 33, Mode 1 to Mode 7 can be addressed.
- Under Mode 1 individual measuring values can be displayed. Mode 1 is not recommended for use in an Audi Service department, because these values can be displayed much more precisely using address word 01 and "Basic Setting" function 04 or "Read Measuring Value Block" function 08.
- Mode 2 shows the operating conditions under which the stored malfunctions were recognized.
- With Mode 3, DTC memory is checked-with Mode 4, DTC memory is erased.
- Mode 5 shows the statistical value of the oxygen sensors as mandated by law. As these values have no direct bearing on oxygen sensor diagnosis, Mode 5 is of no particular value in an Audi Service department.
- Under Mode 6, values can be checked for components and systems that are not continuously monitored.
- With Mode 7 all malfunctions can be checked, even if they have not switched on the Malfunction Indicator Lamp (MIL) (if the MIL has not been switched on, there is no malfunction recognized under Mode 3)