Engine Speed Signal, Checking

Engine speed signal, checking

NOTE: The signal is generated by the Engine speed (RPM) sensor -G28- and processed by the engine control module.

Determine the engine speed, as follows:

- Connect vehicle diagnostic, testing and information system VAS 5051 or V.A.G 1551 Scan Tool and select engine electronics control module with "Address word" 01. For this purpose, ignition must be switched on.

Indicated on display
Rapid data transfer HELP
Enter address word XX


- Check all control modules for a missing engine speed signal via "Automatic test sequence".
- Press "0" key twice for "automatic test sequence" function and confirm entry with Q key.

No DTCs relating to a "missing engine speed signal" should be stored in any of control modules.

If one of the control modules indicates a malfunction:

- Locate open circuit or short circuit between engine control module and control module concerned.