Tacoma PreRunner Reg Cab 2WD L4-2.7L (3RZ-FE) (1999)
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Engine Control Module: Testing and Inspection
Related Diagnostic Procedures
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 terminal +B of the ECM.
WIRING DIAGRAM
Step 1
