Daihatsu Hijet Efse Ecu Pinout Hot File

Daihatsu Hijet EF-SE engine ECU pinout typically involves two or three connectors, depending on the specific model year and market (JDM vs. export). For standard S200 and S210 series Hijets, the ECU manages the SOHC 6-valve engine's electronic fuel injection (EFI) and ignition. Google Books Common ECU Pin Functions (EF-Series)

While exact numbering varies by ECU part number (such as 89560-97543), the following core pins are standard across most EF-engine EFI systems: Live To Dai Power & Ground : Switched power from the EFI relay. : Constant battery power (12V) for memory. E1 / E01 / E02 : Main chassis grounds for the ECU and power circuits. : Sensor ground (common for TPS and coolant sensors). Inputs (Sensors) : 5V reference power supplied to sensors. : Manifold Absolute Pressure signal. : Coolant temperature sensor input. : Intake air temperature sensor input. : Oxygen sensor signal.

: Throttle position sensor (TPS) idle and power enrichment signals. : Engine speed (crankshaft or distributor) signal. Outputs (Actuators) : Fuel injector control (often grouped). : Ignition trigger/coil control. : Idle speed control valve. : Fuel pump relay control. : Check engine light (MIL) output. Diagnostic Access

For troubleshooting "hot" electrical issues or sensor failures, you can often bridge terminals

on the diagnostic connector to read blink codes on the dashboard.

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

The Daihatsu Hijet EF-SE engine ECU pinout typically follows a multi-plug configuration, commonly seen in the S200P and S210P series. Finding the "hot" (power) pins is critical for diagnostics or engine swaps.  Core ECU Power & Ground Terminals  daihatsu hijet efse ecu pinout hot

For most EF-series engines (like the EF-SE found in S200 Hijets), the power terminals are located as follows: 

+B1 / +B2 (Main Power): These are the switched 12V power supply pins.

BAT (Constant Power): This pin provides constant battery voltage for memory backup.

E1 / E2 / E01 (Grounds): These are the primary chassis and sensor ground points.  Typical 2-Plug Configuration (22-Pin & 12-Pin) 

Many Hijet S200 models utilize a 22-pin and 12-pin connector setup. Below is a summarized mapping based on common EF engine documentation from the Live To Dai community:  Pin Name  Description Common Location +B1 / +B2 Switched 12V Power Pin 11 & Pin 22 (Plug 1) BAT Constant 12V Backup Varies by year; check for constant voltage E1 / E2 Ground / Earth Pin 1 & Pin 12 (Plug 1) VC Sensor 5V Supply Pin 2 (Plug 1) PIM MAP Sensor Signal Pin 3 (Plug 1) THW Water Temp Sensor Pin 4 (Plug 1) INJ Injector Control Pin 11 (Plug 1 - in 26-pin variants) Key Diagnostic Terminals 

If you are troubleshooting a "no start" or performance issue:  Daihatsu Hijet EF-SE engine ECU pinout typically involves

W (Check Engine Light): Grounded by the ECU to illuminate the MIL.

T (Test Terminal): Shorted to ground to trigger diagnostic codes. SPD (Speed Sensor): Input for vehicle speed signal.  Safety & Access Tips 

Location: The ECU is typically located behind the glove compartment or on the cowl side of the passenger seat.

SST Usage: Professional manuals recommend using a Special Service Tool (SST) sub-harness to measure voltage without damaging the harness pins.

Battery Disconnection: Always disconnect the negative battery cable before unplugging or plugging in the ECU to prevent shorting the "hot" pins. 

For exact wire colors and high-resolution diagrams specific to your chassis number, specialized manuals like the Daihatsu Hijet English Electrical Service Manual by James Danko are highly recommended.  EF Engine ECU Pinouts - DIY or TECHNICAL - Live To Dai The Heated Oxygen Sensor (HO2S) uses a high-current

The Heated Oxygen Sensor (HO2S) uses a high-current heater circuit. When the sensor insulation fails, it shorts the heater wire to the sensor signal wire, backfeeding voltage into ECU pin E5.

Below is an organized, actionable reference for the EFI-type Daihatsu Hijet with the EF-SE engine ECU pinout focusing on the “hot” side: power inputs, ignition-switched feeds, fused supplies, and power-switched outputs that remain energized when key is ON or in START. Use this for diagnostics, wiring repair, or adding accessories. Assume left/right connector orientation when facing the ECU; verify with your vehicle wiring diagram and meter before applying power.

Heat is the EFSE ECU’s nemesis. The ECU is often mounted on the firewall or near the heater core. Over time, thermal cycles cause:

When searching for a “hot” pinout, you need to know which pins carry high current and which carry sensitive 5V signals.

Since generic pinouts can be risky, here is the safest way to map your specific EFSE harness without blowing components:

If you are here because you are swapping an EFSE into a buggy, building a turbo mini-truck, or installing a piggyback ECU, you need to understand the limitations of the stock Denso unit.

Now that you have the pinout, here are the three most common electrical failures specific to this chassis.