Automatic Test Sequence

Automatic Test Sequence

During test and assembly work malfunctions can be recognized from other control modules e.g. connector disconnected. Therefore on completion the DTC memories of all control modules must be checked and erased. To do
this:
- Connect VAG 1551 Scan tool (or VAG 1552) and select Motronic Engine Control Module (ECM) -J220- with the "Address word" 01. Engine must be running at idle speed. Connecting scan tool and selecting Motronic Engine Control Module (ECM) -J220-. [1][2][3]Connecting VAG 1551 Scan Tool
- Switch on scan tool printer with print button. Lamp in button must light up.
- Press button -0- twice for address word "Automatic test sequence" and confirm entry with -Q- button. VAG 1551 transmits all known address words one after another.

When a control module answers with its identification the number of stored DTCs appears on the display or "No DTC recognized."

Any system DTCs that are stored will be displayed one after the other and printed out. The VAG 1551 will then transmit the next address word.

The automatic test sequence has ended when following is indicated on display.


VAG - ON BOARD DIAGNOSTIC HELP
1 - Rapid data transfer*
2 - Blink code output*


* Appears alternately

- Erase all DTC memories and road test vehicle.
Observe the valid safety precautions during a test drive.

During the road test the following operating conditions must be fulfilled:
- The Engine Coolant Temperature (ECT) must exceed 85 °C

When the temperature is reached, the operating conditions must be attained several times:
- Idling
- Part throttle
- Wide Open Throttle (WOT)
- Overrun

- At WOT the speed must exceed 3500 RPM

- Again check DTC memory of all control modules using "automatic test sequence."

If no DTC is stored:

- Press -> button.

Indicated on display


Rapid data transfer HELP
Select function XX


- Press buttons -0- and -6- for function "End output" and confirm entry with -Q- button.
- Switch off ignition.


NOTE: If the On Board Diagnostic (OBD) has not detected a malfunction, use the appropriate DTC table for further Troubleshooting.