4s-fe Ecu Pinout [best] Jun 2026

He probed the corresponding wire on the harness—a white wire with a black stripe. He turned the key to 'On'. The multimeter read 0.00 volts. Nothing.

Electrical Load Signal System. Taillight Relay. AC2. Unknown. 12V To Aircon Computer. TE2. White-Blue. Check Connector. TE1. Gray. 4E-FE ECU Pinout and Wiring Guide | PDF | Throttle - Scribd 4s-fe ecu pinout

If you are working on a vintage Toyota—be it a Corona (ST150/160), Carina (AT190), Celica (ST182/184), or even a Camry (SV25)—the is a familiar sight. This 1.8-liter, fuel-injected, inline-4 cylinder engine is legendary for its durability and simplicity. However, as these vehicles approach 30 years old, wiring harnesses degrade, corrosion sets in, and mechanics need to diagnose ECU failures. He probed the corresponding wire on the harness—a

The 4S-FE ECU (especially 89661-20450) uses Japanese capacitors from the late 80s that leak. Open the ECU case. Look for brown goo, swollen caps, or corroded traces near the power supply pins (A1, A2). Symptoms: Nothing

The CarTechnology forum has archived threads specifically requesting 4S-FE pinouts for the ST190 Corona. Toyota 4S-FE ecu pin out please - Printable Version

Always check your ECU part number (e.g., 89661-05490 , 89661-2B250 ) before trusting any diagram. This guide covers the common 22-pin + 16-pin + 12-pin layout (Gen 2) found in most USDM 1992-1994 Camrys.