Measuring condition

After warming-up
At idling

Fig 1: Engine Control Module I/O Signal Graph
Courtesy of SUBARU OF AMERICA, INC.

Fig 2: Engine Control Module I/O Signal - Circuit Diagram (1 Of 4)
Courtesy of SUBARU OF AMERICA, INC.

Fig 3: Engine Control Module I/O Signal - Circuit Diagram (2 Of 4)
Courtesy of SUBARU OF AMERICA, INC.

Fig 4: Engine Control Module I/O Signal - Circuit Diagram (3 Of 4)
Courtesy of SUBARU OF AMERICA, INC.

Fig 5: Engine Control Module I/O Signal - Circuit Diagram (4 Of 4)
Courtesy of SUBARU OF AMERICA, INC.