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Switched +12V power input from the EFI main relay.
Throttle Position Sensor (TPS) signals. VTA tracks throttle angle; IDL signals when the throttle is fully closed (idle). 3s-fe ecu pinout pdf
While the physical position of a pin changes between models, Toyota's acronyms and terminal labels remained remarkably consistent during this era. Below is a comprehensive index of standard 3S-FE ECU pin functions: Power Supply & Ground Circuits
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The 3S‑FE ECU pinout is a cornerstone for anyone looking to modify, diagnose, or simply understand Subaru engine electronics. By consulting the official PDF, respecting voltage limits, and following best‑practice wiring techniques, you can safely expand the capabilities of your vehicle without compromising reliability.
Wire the FC (Fuel Control) pin to the negative side of your circuit opening relay to automate fuel pump activation. Finding and Downloading a 3S-FE ECU Pinout PDF Throttle Position Sensor (TPS) signals
A valuable resource for older Camry 3S-FE (1987-1991) pinouts.