If the mass air flow sensor does not pass the test, then you need to contact the service station, where additional diagnostics will be carried out. To check the mass air flow sensor, a control diode lamp is required.
Check the mass air flow sensor in the following order:
- Disconnect the plug-in block of the mass air flow sensor;
Pic. 204. View of the inside of the plug block of the mass air flow sensor: «1» and «4» - contacts for connecting a diode lamp
- connect the legs of the control diode lamp to the terminals «1» and «4» plug socket (pic. 204);
- with the help of an assistant, start the engine. If the lamp lights up, then, therefore, an electric current enters the mass air flow sensor.
Note. Other malfunctions of the mass air flow sensor can be determined and eliminated only if special devices from the company are available «Volkswagen».
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