Switched 12V power inputs coming from the EFI Main Relay.
Fuel Injector Drives IGT1 - IGT8: Ignition Trigger Signals (Coil on Plug) IGF: Ignition Feedback Signal FC: Fuel Pump Relay Control Emissions & Control
5V reference power supplied by the ECU to sensors like the TPS and MAP/MAF. VG: The Mass Air Flow (MAF) sensor signal. 2uzfe ecu pinout
You cannot troubleshoot without the proper tools. Using a high-impedance digital multimeter and the reference chart below, you can diagnose the heart of the engine management system without a fancy scan tool.
2004 2UZ-FE Engine Repair Manual (FlipHTML5) : A comprehensive guide for mechanical and electrical systems. Switched 12V power inputs coming from the EFI Main Relay
These engines feature a mechanical throttle body with a traditional Throttle Position Sensor (TPS) and an Idle Air Control (IAC) valve. They utilize non-VVTi cylinder heads and a simpler 4-plug or 5-plug ECU configuration.
: The ECU manages 8 individual ignition coils and fuel injectors (Pins #10 through #80). Position Sensors : You cannot troubleshoot without the proper tools
Building An Engine Harness From Scratch // 2UZ V8 '74 Celica