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EC-412 < ECU DIAGNOSIS > [QR25DE] ECM 38 Ground R Throttle position sensor 2 Input [Ignition switch: ON] leased Less than 4.75V [Ignition switch: ON] pressed More than 0.36V 39 Ground R Refrigerant pressure sensor Input [Engine is running] fan motor switch: ON (Com- 1.0 - 4.0V 40 Ground G Sensor ground — [Engine is running] 0V 45 Ground B/W A/F sensor 1 (bank 1) Input [Ignition switch: ON] 2.2V 46 Ground Y Engine coolant temperature Input [Engine is running] 0 - 4.8V 47 Ground B Sensor power supply — [Ignition switch: ON] 5V 49 Ground L A/F sensor 1 Input [Engine is running] 1.8V 50 Ground L/Y Intake air temperature sen- Input [Engine is running] 0 - 4.8V 52 Ground LG Sensor ground — [Engine is running] 0V 56 Ground G/B Sensor ground — [Engine is running] 0V 58 Ground O Mass air flow sensor Input [Engine is running] 0.9 - 1.2V [Engine is running] 1.5 - 1.8V 59 Ground G/W Sensor power supply — [Ignition switch: ON] 5V 60 Ground Y/B Sensor ground — [Engine is running] 0V 61 Ground W Knock sensor Input [Engine is running] 2.5V 64 Ground B/R Sensor ground — [Engine is running] 0V Terminal No. Wire color Description Condition Value (Approx.) + -– Signal name Input/ Output |