3315402 - 1056BB Check efficiency of hot film air flow meter

Make sure that the ignition is off (STOP position), then disconnect the negative battery terminal (refer to op. 5530B10).Disconnect the electrical connection from the hot-film air flow meter.

	Name	Connector
-	Air flow meter	K41

Check the characteristic curve of the air flow meter, measuring the voltage between pins 3 and 5 in accordance with the air flow. 1, Air temperature sensor 2, 14 V supply 3 Earth 4, 5 V reference voltage 5, Output voltage (signal) -Check that the nominal resistance of the air sensor in the hot-film air flow meter corresponds to 2.0 kohm ± 5% between pins 1-3 at 25° C.