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Check The Mass Air Flow Sensor Unit
- Connect the battery positive terminal to terminal No. 1 and the battery ground terminal to terminal No. 2, the circuit tester positive terminal to terminal No. 3 and the circuit tester ground terminal to terminal No. 2.
Courtesy of SUBARU OF AMERICA, INC.
- Check the voltage changes when air is blown to the mass air flow sensor unit in arrow direction.
Courtesy of SUBARU OF AMERICA, INC.