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Home >> Toyota >> 2003 >> Matrix 2WD L4-1.8L (1ZZ-FE) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Component Tests and General Diagnostics >> ECM Power Source Circuit
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ECM Power Source Circuit

CIRCUIT DESCRIPTION

When the ignition switch is turned ON, battery positive voltage is applied to the coil which closes the contacts of the E.F.I. relay (Marking: E.F.I.) and supplies power to the terminal +B of the ECM.

Wiring Diagram:






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INSPECTION PROCEDURE