Daihatsu Hijet Efse Ecu Pinout Hot ((hot)) Info
Daihatsu Hijet EF-SE (typically found in S200 and S210 series), the ECU pinout is essential for diagnosing EFI issues or performing engine swaps. The EF-SE is a Single Overhead Cam (SOHC) engine often paired with a 2-plug ECU configuration. Live To Dai Core ECU Pinout (22-Pin Connector)
Based on common EF-series technical data, the primary 22-pin connector (Plug 1) typically follows this configuration when viewed from the wire-entry side with the clip on top: Live To Dai Pin 1 (E1): Main Engine Ground. Pin 2 (VC):
Sensor Reference Voltage (typically 5V for MAP/Throttle sensors). Pin 3 (PIM): Intake Manifold Pressure Sensor signal. Pin 4 (THW): Water Temperature Sensor signal. Pin 5 (N+): Engine Speed Signal (Crank/Distributor positive). Pin 6 (IDL): Idle Switch signal. Pin 7 (SPD): Vehicle Speed Sensor input. Pin 11 (+B1): Switched Power Supply (Ignition ON). Pin 12 (E2): Sensor Ground. Pin 13 (OX): cap O sub 2 ) Sensor signal. Pin 14 (THA): Intake Air Temperature Sensor signal. Pin 15 (T): Test Terminal (for diagnostic code retrieval). Pin 16 (N-): Engine Speed Signal negative. Pin 18 (AC): Air Conditioning signal. Pin 22 (+B2): Secondary Power Supply. Live To Dai Critical Wiring Warnings Alternator/Earth Conflict: On Series 1 EF engines,
is typically a ground. However, on Series 2 EF engines, this was changed to a
for the alternator loom. Mixing these looms without repinning will instantly blow the 15A engine fuse. Testing Equipment: Always use a high-impedance digital multimeter (at least 10 daihatsu hijet efse ecu pinout hot
) when probing ECU terminals to avoid internal circuit damage. Common Components for EF-SE
If you are troubleshooting, these specific parts are frequently linked to the ECU's performance in the S200P/S210P models: Fuel Injectors:
Uses specific S200P-compatible injectors (Part: 23250-97204-000). Main ECU Unit:
Often labeled as Fujitsu Ten or Denso (Common Part: 89560-series). Spark Plugs: Standard NGK BKR6E-11 or equivalent. Yokohama Motors JDM OEM Auto Parts Daihatsu Hijet EF-SE (typically found in S200 and
Detailed wiring diagrams and technical manuals for the Hijet can be sourced from specialty providers like Yokohama Motors JDM Manuals Are you currently dealing with a no-start condition or are you planning a wiring harness modification EF Engine ECU Pinouts - Page 2 - DIY or TECHNICAL
Known / suspected pins (need verification):
| Pin | Function | Notes | |------|---------------------|-----------------------------| | A1 | +12V Battery (main) | Always hot | | A2 | +12V Ignition (IG) | Hot in RUN/START | | A3 | Ground (ECU main) | To chassis/engine | | B4 | Coolant temp sensor | 2-wire sensor – critical for hot start | | B6 | Ignition signal (from igniter) | Or to igniter? | | C2 | Fuel pump relay control | Grounds relay coil | | C5 | Crank signal (distributor) | RPM signal | | C7 | TPS (if equipped) | Some EFSE have TPS, some don't |
Does anyone have the full pinout diagram? A photo of a factory wiring diagram page or a hand-drawn pin map would be huge.
Wiring Color Code Decoder (Daihatsu Specific)
Daihatsu uses a logical color code, but age fades the wires. Use this translator: Wiring Color Code Decoder (Daihatsu Specific) Daihatsu uses
- B = Black (Ground)
- W = White (Battery Positive)
- R = Red (Switched or accessory)
- L = Blue (Actuators)
- Y = Yellow (Sensors / Injectors)
- G = Green (Relays)
- BR = Brown (Dedicated sensor ground)
- P = Pink (Injector 1)
Example: "W-R" means a White wire with a Red stripe.
1. The Melted EFI Relay Socket
Because the B1 and B5 pins draw significant current, the EFI relay (located in the engine bay fuse box) often corrodes. The heat melts the fuse box plastic.
- Symptom: Crank but no start. No injector pulse. No spark.
- Fix: Check for 12V on pin B3 of the ECU while cranking. If absent, bypass the relay temporarily for diagnosis.
Common related sensors (powered from hot supplies)
- MAF/TPS/ECT/Map/Throttle position, etc. — sensor 5V/12V supplies typically come from ECU-switched power (main relay). Labelled VREF, 5V, or +12V depending on sensor.
- O2 sensor heater — often powered from a fused ignition feed or separate fuse; heater circuit is energized when ECU requests and when ignition ON.
Part 5: Real-World Case Study – “Hot Stall at Red Light”
Symptom: 1995 Daihatsu Hijet S110, EFSE engine. Runs fine for 15 minutes, then dies at idle when hot. Restarts after 20 minutes of cooling.
Diagnosis using pinout:
- Hot ground check: Pin 24 to battery negative = 0.4V (acceptable).
- 5V reference hot: Pin 26 = 4.3V (failure).
- Open ECU: Two capacitors near power supply bulging. Replaced with 105°C rated caps.
- Also reflowed solder on main relay transistor (Q501).
Result: 5V reference returned to 5.02V hot. Stall eliminated.