Preconditions for the test:
Engine running.
No faults stored.
Note:
For testing knock sensors.
Procedure:
Choose the function: Knock control.
Keep the engine speed above 2600 rpm.
The diagnostic status field changes from ”Test off” to ”Test on”.
Maintain engine speed above 2600 rpm until the diagnostic status field changes to ”Sys. OK/ Sys. not OK!”.