Mixing these looms or ECU models without re-pinning will result in a direct short circuit. Performance & Troubleshooting Tips
Engine speed/crankshaft position sensor signal (Positive).
If the THW sensor (connected to the THW pin on the ECU) reads incorrectly due to heat soak, the ECU injects too much fuel (choke) into a hot engine.
If you suspect your ECU is overheating or you are tracing a wiring fault, follow this systematic diagnostic approach: 1. Visual Inspection daihatsu hijet efse ecu pinout hot
Pin must consistently generate 4.9V to 5.1V with the ignition switch set to the run position. If this line registers significantly lower or grounds out completely, isolate the MAP sensor and Throttle Position Sensor one at a time to check for internal sensor shorts. Sensor Sweep Profiles
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Input from the speed sensor, often used for idle control and rev-limiting. Power & Ground Terminals E1 / Earth: Main chassis ground for the ECU. +B / EFI Main: Switched 12V power from the EFI relay. Mixing these looms or ECU models without re-pinning
Are you dealing with a , or are you working on an engine swap ?
Mapping this specific ECU pinout is essential when executing engine swaps, diagnosing intermittent electrical faults, or wiring aftermarket electronics. Identifying the correct pin assignments prevents accidental voltage spikes that can permanently damage the sensitive internal circuitry of the factory unit.
Rough running, black exhaust smoke, or erratic shifting when hot. If you suspect your ECU is overheating or
The is one of the most highly sought-after wiring configurations for kei truck mechanics, JDM vehicle restorers, and custom engine-swap enthusiasts. The EF-SE is a 659cc single overhead cam (SOHC), 6-valve, electronic fuel injected inline-3 engine found widely across eighth- and ninth-generation Daihatsu Hijets (such as the S100, S200, and S210 series).
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)
If you need help identifying a specific wire color or tracking down a fault code, let me know: