Engine Speed (RPM) Signal, Checking

Additional signals, checking

Engine Speed (RPM) signal, checking

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

To obtain engine speed, proceed as follows:
- Connect Vehicle Diagnostic, Testing and Information System VAS5051 or VAG 1551 Scan Tool and select engine electronics control module by entering address word "01", [1][2]Scan Tool Connecting and Initial Checks. When doing this the ignition must be switched on.

Indicated on display

Rapid data transfer HELP
Enter address word XX

- Check all control modules for a missing RPM signal via the "Automatic Test sequence."

- Press -0- button twice to select "Automatic Test Sequence" function and confirm entry by pressing -Q- button.

No malfunctions relating to a missing "Engine Speed (RPM) signal" should be stored in any of the control modules.

If one of the control modules indicates a malfunction:
- Check for open circuit or short circuit between engine control module and the control module concerned.

- Display readiness code, Readiness Code Reading. Readiness code must be generated if DTC memory was erased, Readiness Code, Generating