Engine Operation, Checking

NOTE: This check will verify if the Engine Control Module recognizes the engine operating conditions


Special tools, testers and auxiliary items
- VAG 1551/1552 Scan Tool using VAG 1551/3 adaptor cable

Requirement
- Engine oil temperature 80 °C (176 °F) minimum

Test sequence
- Connect VAG 1551 (VAG 1552) Scan Tool
See 'Testing and Inspection, Procedures, Address word 01, VAG 1551 Scan Tool, connecting.' Testing and Inspection
- With engine idling, press 0 and 1 buttons to select Address Word 01: "engine electronics"

Display will appear as shown


Rapid data transfer HELP
Select function XX


- Press 0 and 8 buttons to select Function 08 "Read measuring value block"
- Press Q button to enter selection

Display will appear as shown


Read measuring value block HELP
Input display group number XXX


- Press 0, 0 and 5 buttons to select "Display group numbers"
- Press Q button to enter selection

Display will appear as shown (1 to 4 = Display zones)


Read measuring value block 5 ->
1 2 3 4


- Check whether ECM recognizes operating mode (Display zone 4)

Display group 5:

If specifications not obtained
- Check accelerator mechanism for ease of operation
- Check Throttle Valve Control Module
See 'Throttle Body, Testing and Inspection.