Toyota Tundra Service Manual: Components



    Front Propeller Shaft Assembly


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    Toyota Tundra Service Manual > Sfi System: ECM Power Source Circuit
    DESCRIPTION When the ignition switch is turned to ON, the battery voltage is applied to the IGSW terminal of the ECM. The output signal from the MREL terminal of the ECM causes a current to flow to the coil, closing the contacts of the integration relay (EFI relay) and supplying power to terminals + ...

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    Toyota Tundra Service Manual

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