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.
If your ECU is physically hot to the touch or failing under heat:
Permanent 12V backup power for memory storage (DTC codes). Common "Hot" Wiring & Diagnostic Issues daihatsu hijet efse ecu pinout hot
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.
The EF-SE engine differs from its twin-cam sibling (the EF-VE) by utilizing a Single Overhead Camshaft (SOHC) configuration featuring two valves per cylinder. It employs a distributorless, waste-spark digital ignition system or an integrated distributor setup, depending on the production year and market region. Mapping this specific ECU pinout is essential when
This secondary interface monitors internal engine parameters and real-time environmental metrics to alter fuel maps dynamically. Pin Number Terminal Label Sensor Source Assignment Signal Type / Reference Voltages VC 5V Regulated Reference Output to Sensors 5.0V Constant 3 THW Engine Coolant Temperature Sensor Analog 0.5V (Hot) to 4.5V (Cold) 4 KNK Engine Knock Sensor Intake Signal AC Analog Voltage Frequency 5 N+ Engine Crankshaft Speed / Angle Signal (+) Inductive/Hall Waveform 7 IDL Idle Switch Contact Point Position Indicator 0V (Closed) / 5V (Open Throttle) 8 SPD Vehicle Speed Sensor Output Signal Line Pulsed Square Wave Signal 9 PIM Manifold Absolute Pressure Sensor Signal Input Analog 1.0V (High Vac) to 4.2V (WOT) 11 THA Intake Air Temperature Sensor Interface Analog Resistance Curve 12 OX Heated Oxygen Sensor Voltage Return Signal Fluctuating 0.1V (Lean) to 0.9V (Rich) 13 N- Engine Crankshaft Speed / Angle Signal (-) Ground Reference Shield 3-Plug ECU Variant (Later 2004–2006 Models)
The is a critical piece of technical data required for diagnostic troubleshooting, engine swaps, and converting old carbureted mini trucks into fuel-injected setups. The EF-SE engine—a 660cc, 3-cylinder, Single Overhead Cam (SOHC) Electronic Fuel Injection (EFI) engine—relics heavily on a specific 2-plug Denso control unit configuration. Common "Hot" Wiring & Diagnostic Issues The EF-SE
While terminal layouts can vary slightly depending on production years (e.g., S200 vs S210 series), Daihatsu keeps consistent terminal naming schemes across its EF-series engine platforms . The core map below outlines the critical connections you need to check:
The and its related passenger car variants (like the Daihatsu Mira/Cuore) featuring the EF-SE engine are celebrated globally for their incredible reliability, compactness, and workhorse capabilities. At the heart of this fuel-injected micro-machine lies the Engine Control Unit (ECU).
Because these compact utility vehicles work hard in harsh conditions, specific connections can build up resistance, creating "hot" spots or overheating points inside the control unit circuitry. This comprehensive wiring guide breaks down the essential pinouts, power sources, and common electrical failures. Understanding the EF-SE Engine Control Unit