Because the EF-SE system utilizes a legacy Japanese OBD-1 protocol, checking fault codes does not require an expensive scan tool:
Over time, the wiring loom near the exhaust manifold can become brittle and melt, causing 12V power wires to short to the ground or signal wires. This can instantly fry ECU pathways.
[Your Name] Vehicle: Daihatsu Hijet (S85 / S83 / S110 chassis) – EFSE engine (carbureted 550cc) daihatsu hijet efse ecu pinout hot
The Electronic Control Unit (ECU) manages the Electronic Fuel Injection (EFI) system by processing signals from various sensors and controlling actuators like injectors and the fuel pump. In many Hijet models, the ECU is located behind the dashboard or glove compartment area. Critical ECU Pinout Terminals
For serious performance builds (especially EF-DET turbo swaps or other engine conversions), replacing the factory ECU with a programmable unit like Link, MOTEC, or HKS Power FC provides unlimited tuning flexibility. However, this requires building a custom wiring harness and extensive dyno tuning. Because the EF-SE system utilizes a legacy Japanese
If you are troubleshooting a "no start" or performance issue:
On the EFSE, the Idle Air Control Valve is electronically controlled by the ECU (look for the ISC pins on the connector). In many Hijet models, the ECU is located
Managed by a specialized Denso or Daihatsu ECU, which constantly takes readings from sensors (O2 sensor, throttle position, coolant temperature) and adjusts fuel-to-air ratios. Unraveling the ECU Pinout (The 16-Pin Connector)
The most reliable source is the official Daihatsu workshop manual for your Hijet's specific model year. These are available for purchase online from sites like tradebit.com and emanuals.com, or you can find physical copies (such as the "Daihatsu EFSE, EFVE, EFVN, EFDET Series Engine Factory Service Manual"). Be aware that pinouts can change slightly between model years.
Connect a jumper wire between and Plug 1, Pin 1 (E1) . Turn the vehicle ignition to the ON position.