If you are stranded with a hot ECU that refuses to power the main relay (Pin 4 no ground), you can force power:
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.
: RPM and engine timing reference inputs generated by the distributor or crank sensor pickup.
Clean the pins with electronic cleaner. Use a small pick tool to lightly tighten the tension of the female pins inside the connector so they grip the male pins on the ECU tightly. 4. Overloaded Circuits (Injectors/Sensor Harness)
Daihatsu Hijet EFSE ECU Pinout / Wiring Diagram (Hot Start & No-Start Help) daihatsu hijet efse ecu pinout hot
Here’s a forum-style post tailored for someone searching for the (likely chasing a hot start or wiring issue). You can post this on a minitruck forum, Facebook group, or technical blog.
If you are undertaking a heavy diagnostic or engine rebuild, having access to official literature and community forums can save you hours of guesswork.
This pin must alternate rapidly between 0.1V and 0.9V at least 8 times over a 10-second window when the fuel management system drops into closed-loop operation. A static 0.45V reading points to a broken wire line or a faulty sensor element. Troubleshooting Common Electrical Faults No Spark / No Injection Pulse
Measure the resistance between the E1 pin and the vehicle frame. Any reading above 0.2 Ohms points to a rusted ground strap or a corroded engine block connector that needs to be cleaned. 5. Safety Protocols for EF-SE Electrical Work If you are stranded with a hot ECU
Are you currently troubleshooting a , such as a no-start condition or a sensor error code? EF Engine ECU Pinouts - DIY or TECHNICAL - Live To Dai
| Condition | Pins that become hot (12V) | |-----------|----------------------------| | | Pin 1 (constant), Pin 15 (main relay feed) | | Key ON (RUN) | Pin 27 (+12V ignition), Pin 4 (injector 12V) | | Key START | Pin 21 (starter signal) – hot only while cranking | | Engine running | Pin 8 (fuel pump – ground trigger, not 12V, but activates relay), Pin 20 (distributor sync) |
Detailed diagrams for specific chassis (e.g., S200P, S210P) are available in the Daihatsu Hijet English Electrical Service Manual or through technical communities like Live To Dai pin numbering for a 2-plug or 3-plug connector layout? EF Engine ECU Pinouts - DIY or TECHNICAL - Live To Dai
: Feeds variable voltage (0.1V – 0.9V) from the exhaust sensor to execute closed-loop fueling control. Clean the pins with electronic cleaner
) when probing ECU terminals to avoid internal circuit damage. Common Components for EF-SE
Ground (GND / Earth)
Pin 10 is often used as a dedicated earth (ground).
Some owners abandon the EF-SE entirely, swapping in the turbocharged engine or even other Daihatsu motors. If performing an engine swap, the EF-SE ECU will not control a different engine correctly. Options include:
The configuration is a critical piece of technical data required to diagnose, wire, or modify the 659cc three-cylinder electronic fuel-injected (EFI) engine common in S200-series Kei trucks. Demystifying the exact placement of power supplies, grounding loops, and critical sensor feeds on the engine control unit allows mechanics and owners to handle everything from standard engine swaps to complex aftermarket wiring modifications. Understanding the exact terminal configurations prevents hardware damage and streamlines diagnostic tasks on the vehicle's electrical platform. Understanding the Daihatsu EF-SE Architecture
EF Engine ECU Pinouts * E1. * VC. * PIM. * THW. * N+ * IDL. * SPD. * Blank. * Blank. * Blank. Live To Dai