Selectable Functions Using Address Word 01: "Engine Electronics"
Use the following table to determine which prerequisites are required to select the desired Functions:
| Function | Prerequisite | |||||
|---|---|---|---|---|---|---|
| VAG1551/VAG1552 scan tools | Engine stationary, ignition switched ON | Engine running at Idle | Vehicle being driven | |||
| 01 | Check ECM version | YES | YES | YES | ||
| 02 | Check DTC memory | YES(1) | YES | YES | ||
| 03 | Output Diagnostic Test Mode (DTM) | YES | YES | NO | ||
| 04 | Basic setting | NO | YES | NO | ||
| 05 | Erase DTC memory | YES | YES | YES | ||
| 06 | End output | YES | YES | YES | ||
| 07 | Code control module | YES | NO | NO | ||
| 08 | Read measuring value block | YES | YES | YES | ||
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Address word 33, CARB / OBD II, Selectable Functions (modes)
| Function | Prerequisite | |||
|---|---|---|---|---|
| VAG1551/VAG1552 scan tool | Engine stationary, ignition switched ON | Engine Idling | Vehicle being driven | |
| Mode 1 | Transfer diagnostic data | YES | YES | YES |
| Mode 2 | Transfer operating conditions | YES | YES | YES |
| Mode 3 | Check DTC memory | YES | YES | YES |
| Mode 4 | Erase DTC memory (diagnostic data) | YES | YES | YES |
| Mode 6 | Transfer measured values | YES | YES | YES |
| Mode 7 | Check DTC memory | YES | YES | YES |
Individual measurement values can be displayed in mode 1 but this method is not recommended for VW workshops because expanded data is available using address word 01, function 04 or function 08.
Mode 2 shows the operating conditions under which a malfunction was detected.
DTC memory is checked via mode 3 and is erased via mode 4.
Use mode 6 to check measured values of components and systems which are not continually being monitored.
Use mode 7 to display malfunctions that have been recognized once by on board diagnostic but did not switch ON the malfunction indicator lamp -K83-. Malfunctions may not necessarily be present, correspondingly no malfunctions will be revealed via mode 3. However, if malfunctions stored via mode 7 repeat, they will be displayed via mode 3 and erased via mode 7.