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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) 13A-329 . CIRCUIT OPERATION • The injector power is supplied from the injector relay (terminal No. 3). • The ECM controls the injector by turning the power transistor in the ECM "ON" and "OFF". . TECHNICAL DESCRIPTION • The amount of fuel injected by the injector is con- trolled by the amount of continuity time the coil is . DESCRIPTIONS OF MONITOR METHODS The ECM detects open circuit and short malfunction. . MONITOR EXECUTION Continuous . AK704256 Connectors: A-25X, A-34X MFI relay Injector relay A-34X A-25X AB AK704255AB Connector: A-39 A-39 (B) AK704227 Connector: B-09 ECM B-09 (GR) AB AK704266 AB Connector: B-104 B-104 (GR) Injector No. 4 AK704258 AB Connector: C-50 C-50 (B) AK704259AB Connectors: C-304, C-317 ETACS-ECU C-304 C-317 |