Engine Speed (RPM) Signal, 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 VAG1551 scan tool and select engine electronics control module by entering address word "01". When doing this the ignition must be switched on. Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks/Connecting VAS5051 or VAG1551" Testing and Inspection

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 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. The readiness code must be generated if the DTC memory was erased.
Refer to "Monitors, Trips and/or Drive Cycle (Readiness Codes)/Readiness Code" Testing and Inspection
Refer to "Monitors, Trips and/or Drive Cycle (Readiness Codes)/Generating Readiness Code" Testing and Inspection