Digital multimeter (DMM), back-probe pins (or paperclips), wiring diagram.
Unlike carbureted Hijets, the EFSE relies entirely on sensors and actuators. If the ECU loses power, ground, or a critical 5V reference, the vehicle is a brick.
Kenji wiped his forehead, leaving a streak of black oil. "The manual I found is for the older EF-VE. This is the SE. The pins are mirrored, or worse."
Daihatsu uses a logical color code, but age fades the wires. Use this translator: