Engine Controls - Pin Voltage Charts: Testing

ECM circuits are checked at ECM connectors. See Fig 1 -Fig 2 . Testing may be performed with ignition off, with ignition on and engine off, and/or with ignition on and engine running. Test between indicated terminal and good body ground. See Fig 3 -Fig 14 . When testing pin voltage, carefully backprobe terminal at harness side of ECM connector.
If voltage is not as specified, test, repair or replace circuit or affected component. Retest circuit to verify repair has been made. Unless stated otherwise, perform all tests with ECM harness connected.

Fig 1: Identifying ECM Connector Terminals (Forester, Impreza 2.2L, Impreza 2.5L, Legacy 2.2L & Outback Sport 2.2L)

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Fig 2: Identifying ECM Connector Terminals (Legacy 2.5L & Outback 2.5L)

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Fig 3: Identifying ECM Connector Terminals, Circuits & Voltage (Forester - 1 Of 3)

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Fig 4: Identifying ECM Connector Terminals, Circuits & Voltage (Forester - 2 Of 3)

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Fig 5: Identifying ECM Connector Terminals, Circuits & Voltage (Forester - 3 Of 3)

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Fig 6: Identifying ECM Connector Terminals (Impreza, Outback Sport & Legacy 2.2L - California Emissions - 1 Of 3)

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Fig 7: Identifying ECM Connector Terminals (Impreza, Outback Sport & Legacy 2.2L - California Emissions - 2 Of 3)

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Fig 8: Identifying ECM Connector Terminals (Impreza, Outback Sport & Legacy 2.2L - California Emissions - 3 Of 3)

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Fig 9: Identifying ECM Connector Terminals (Impreza, Outback Sport & Legacy 2.2L - Federal Emissions & Impreza 2.5L - 1 Of 3)

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Fig 10: Identifying ECM Connector Terminals (Impreza, Outback Sport & Legacy 2.2L - Federal Emissions & Impreza 2.5L - 2 Of 3)

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Fig 11: Identifying ECM Connector Terminals (Impreza, Outback Sport & Legacy 2.2L - Federal Emissions & Impreza 2.5L - 3 Of 3)

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Fig 12: Identifying ECM Connector Terminals (Legacy 2.5L & Outback 2.5L - 1 Of 3)

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Fig 13: Identifying ECM Connector Terminals (Legacy 2.5L & Outback 2.5L - 2 Of 3)

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Fig 14: Identifying ECM Connector Terminals (Legacy 2.5L & Outback 2.5L - 3 Of 3)

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