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Home >> Mazda >> 1987 >> 626 Base >> Repair and Diagnosis >> Engine Performance >> System >> Fuel INJ - MPFI System >> Testing >> Shift Indicator Light >> 626
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Shift Indicator Light: 626

Warm engine to normal operating temperature. Increase engine speed to 3000 RPM. Make sure voltage at terminal "1S" of ECU is below 1.5 volts. Allow engine to idle and measure voltage at terminal "1S" of ECU. Voltmeter reading should be about 12 volts.