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The gauge of absolute pressure in an inlet collector (MAF) with the IAT

The gauge of absolute pressure in the intake manifold is a sense resistor. It measures the pressure in the intake manifold which varies depending on operating conditions of the engine and is converted into a voltage. The sensor is also used to measure atmospheric pressure at engine start and ensures operating conditions of the engine at different altitudes above sea level. Based on information from the sensor ECU regulates the amount of fuel supplied to the engine, and changes the ignition timing.

Check

PERFORMANCE ORDER

1. Connect a voltmeter between terminals 1 and 4 of the sensor connector. 2. Measure the voltage. Output voltage with the ignition on and engine stopped: 4-5 In The output voltage at a frequency of idling: 0.5-2.0 In 3. If the sensor output voltage is not correct, replace the sensor.