4s-fe Ecu Pinout

The 4S-FE ECU requires stable 12V at pins via the EFI main relay. If the EFI relay clicks but the ECU doesn’t power on, check for blown fusible links (AM2, EFI fuse). Grounds at A10, A11, and C11 must be less than 0.5 ohms to battery negative.

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: Crankshaft and camshaft position signals for timing. OX : Oxygen sensor signal. THW / THA : Water and air temperature sensor inputs. Actuators : #10 / #20 : Injector pulse signals. ISC / ISCV : Idle Speed Control valve pins. W : Check engine light (warning lamp) output. Additional Resources 4s-fe ecu pinout

Are you performing an or trying to diagnose a specific fault code with your 4S-FE? The 4S-FE ECU requires stable 12V at pins

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