Measuring condition

After warming-up
At idling

Fig 1: ECM Input/Output Signals Chart
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Fig 2: ECM - Circuit Diagram (1 Of 4)

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Fig 3: ECM - Circuit Diagram (2 Of 4)

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Fig 4: ECM - Circuit Diagram (3 Of 4)

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Fig 5: ECM - Circuit Diagram (4 Of 4)

Courtesy of SUBARU OF AMERICA, INC.