toyota Workshop Repair Guides

Toyota Workshop Service and Repair Manuals

Component Tests and General Diagnostics|Page 1582 > < Engine Control Module|Diagrams|Connector Views|Page 1579
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Engine Control Module: Component Tests and General Diagnostics

ECM Power Source Circuit

CIRCUIT DESCRIPTION

When the ignition switch is turned to ON, positive battery voltage is applied to the coil, closing the contacts of the EFI main relay (Marked: EFI) and
supplying power to terminal +B of the ECM.

Wiring Diagram

Component Tests and General Diagnostics|Page 1582 > < Engine Control Module|Diagrams|Connector Views|Page 1579