T100 SR5 Extra Cab Pickup 4WD V6-3.4L (5VZ-FE) (1998)
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Engine Control Module: Testing and Inspection
Related Diagnostic Procedures
ECM Power Source Circuit
CIRCUIT DESCRIPTION
When the ignition switch is turned ON, battery positive voltage is applied to the coil, closing the contacts of the EFI main relay (Marking: EFI)
and supplying power to the terminal +B of the ECM.
DETECTING CONDITION
WIRING DIAGRAM
Step 1
