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Do not tap into the VC (A11) pin for aftermarket sensors. That 5V supply is only for the factory AFM and TPS. Use your standalone’s dedicated 5V reference instead.
This guide is for educational purposes. Wiring colors and pin locations can vary based on the specific vehicle model and production year. Always consult a factory service manual for your specific chassis before making wiring modifications. 4s-fe ecu pinout
(MAP) sensors are providing steady voltage readings; incorrect data here can cause rich/lean running conditions. Are you currently working on an engine swap or diagnosing a specific fault like a no-start or rough idle? 4E-FE ECU Pinout and Wiring Details | PDF - Scribd Do not tap into the VC (A11) pin for aftermarket sensors
The CarTechnology forum has archived threads specifically requesting 4S-FE pinouts for the ST190 Corona. Toyota 4S-FE ecu pin out please - Printable Version This guide is for educational purposes
If you have no power at the +B pin, check your EFI fuse and the EFI relay.
: Idle switch signal; tells the ECU the throttle is fully closed.
