A photo of a factory wiring diagram page or a hand-drawn pin map would be huge.
#10, #20, #30 (Injectors): The ECU triggers the fuel injectors by grounding these pins.
The Daihatsu Hijet EF-SE Engine Control Unit (typically manufactured by Denso) uses a divided into a 22-pin plug (Plug 1) and a 12-pin plug (Plug 2) .
A loose or corroded ground forces current to take an alternate path, increasing resistance and generating immense heat. daihatsu hijet efse ecu pinout hot
EF-SE ECUs are robust, but the is often the culprit. Electrical issues account for approximately 90% of Hijet problems—corroded connectors, broken wires, and failed relays are far more common than ECU failure.
The , equipped with the robust and efficient EF-SE 660cc engine, is a stalwart of Kei truck and van utility. However, as these vehicles age or face demanding loads, electrical issues—specifically relating to the Engine Control Unit (ECU)—become common. A frequently reported, critical issue is the EF-SE ECU connector getting "hot" , suggesting excessive resistance or short circuits within the wiring harness.
When pulling plugs out of the ECU or pinning new components, detach the negative battery cable first to prevent accidental shorts. A photo of a factory wiring diagram page
: Manifold Absolute Pressure (MAP) sensor or similar voltage supply. G1 / G3 : Camshaft or Crankshaft position sensor signals. Auxiliary :
Switch your key to the "ON" position. Measure between the VC pin and a clean metal chassis point. It should read a precise 4.95V to 5.05V. If it reads well below 5V or registers 0V, the ECU is either shut down or the circuit is shorted to ground.
Keep this printed in your glovebox:
Usually a single 26-pin or 24-pin square plug.
The EF-SE ECU uses a (typically 3 to 4 separate connectors). Based on factory service electrical manuals for S200P/S210P/S320V/S330V, the following table synthesizes the critical pin functions. Always verify with a multimeter before cutting or splicing wires.
Since generic pinouts can be risky, here is the safest way to map your specific EFSE harness without blowing components: A loose or corroded ground forces current to