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Home >> Volvo >> 1992 >> 740 Base, 4D Sedan, AW70 >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Engine Sensors & Switches >> Notes
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Engine Sensors & Switches: Notes

CAUTION: To prevent damage to Electronic Control Unit (ECU), ensure ignition switch is in OFF position before disconnecting or connecting ignition or fuel injection ECU.