P0103

DTC P0103 Mass Air Flow Sensor (AFS) Circuit High Voltage

DESCRIPTION

The Mass Air Flow sensor (AFS) is located near the air cleaner.

The sensor measures the mass of air passing through the air intake and generates a voltage signal. ECU receives the voltage generated by the sensor and uses the signal to set fuel injector base pulse width and ignition timing.

The resistance of the sensor decreases as mass air flow increases. Voltage and current flow is increased to maintain the film's temperature and resistivity.

DTC Detection Condition:

Circuit Diagram:

Part 1:

Part 2:

TEST PROCEDURE