Air Flow Meter (LMM)

Air Flow Meter (LMM):

Check LMM signal:

•D• 200 - The value Up/Uv (Up = Potentiometer voltage, Uv = Supply voltage of 5 V) indicates the voltage ratio derived from the position of the air vane in the air flow meter. At idle speed, this value is at 0.2 to 0.3, at full load it increases to 0.9. The value 0.02 is indicated if the supply voltage or signal line is interrupted.

Check voltage supply:

With the ignition ON, the air flow meter is supplied with 5 V by the DME control unit Pin 12 (+) and Pin 26 (-). For wiring diagram of air flow meter, see Diagrams / Electrical.