Measuring condition

After warming-up
At idling

Fig 1: Input/Output Signal Waveforms
Courtesy of SUBARU OF AMERICA, INC.

Fig 2: Engine Control Module (ECM) I/O Signal - Circuit Diagram (1 Of 4)

Courtesy of SUBARU OF AMERICA, INC.

Fig 3: Engine Control Module (ECM) I/O Signal - Circuit Diagram (2 Of 4)

Courtesy of SUBARU OF AMERICA, INC.

Fig 4: Engine Control Module (ECM) I/O Signal - Circuit Diagram (3 Of 4)

Courtesy of SUBARU OF AMERICA, INC.

Fig 5: Engine Control Module (ECM) I/O Signal - Circuit Diagram (4 Of 4)

Courtesy of SUBARU OF AMERICA, INC.