First, locate your ECU part number. It's under the passenger kick panel or behind the glove box.
Example labels:
Without the exact part number, pinouts will be wrong. wiring diagram daihatsu l9 ecu pinout
This connector supplies primary power, sensor grounds, and controls injectors and ignition coils. First, locate your ECU part number
Below is the reference wiring diagram for the most common L9 ECU (part numbers starting with 89661-972**). Note: Always verify with your specific chassis number as JDM, EU, and GP models differ slightly. Without the exact part number, pinouts will be wrong
| Pin | Connector | Wire Color | Function | Signal Type | | :--- | :--- | :--- | :--- | :--- | | A1 | A | Black/Yellow | Switched 12V (Ignition) | Power | | A2 | A | Black/White | ECU Ground 1 | Ground | | A3 | A | Black | ECU Ground 2 | Ground | | A4 | A | Red/Black | Main Relay Control (EFI Relay) | Output | | A5 | A | Yellow/Black | Injector Cylinder 1 | Output | | A6 | A | Yellow/Red | Injector Cylinder 2 | Output | | A7 | A | Light Green | Injector Cylinder 3 | Output | | A8 | A | Red/Blue | Ignition Coil 1 (Power Transistor) | Output | | A9 | A | Red/Yellow | Ignition Coil 2 | Output | | A10 | A | Red/White | Ignition Coil 3 | Output | | A11 | A | Brown | Idle Air Control (IAC) – Close | Output PWM | | A12 | A | Gray | Idle Air Control (IAC) – Open | Output PWM | | B1 | B | Green/White | Cam Position Sensor (G Signal) | Input (5V square) | | B2 | B | Blue/Red | Crank Position Sensor (NE Signal) | Input (5V square) | | B3 | B | White | Sensor Ground (Common) | Ground | | B4 | B | Black/Blue | +5V Sensor Reference | Power | | B5 | B | Yellow/Green | Engine Coolant Temp (ECT) Sensor | Analog Input (0-5V) | | B6 | B | Red/Green | Intake Air Temp (IAT) Sensor | Analog Input | | B7 | B | Purple/White | Throttle Position Sensor (TPS) Signal | Analog 0.5-4.5V | | B8 | B | Orange | MAP Sensor Signal | Analog (0-5V) | | B9 | B | Pink | Knock Sensor Signal | AC input | | B10 | B | Light Green/Black | Oxygen Sensor (Front) | 0-1V Zirconia | | C1 | C | Green/Yellow | Check Engine Light (MIL) | Output (GND switched) | | C2 | C | Blue/White | Diagnostic Port (K-Line) | Bi-directional | | C3 | C | Violet | Vehicle Speed Sensor (VSS) | Pulse input | | C4 | C | Brown/White | A/C Demand Switch | Input | | C5 | C | Red/Black | A/C Compressor Relay Control | Output | | C6 | C | Black/Green | Radiator Fan Relay (Low) | Output | | C7 | C | Black/Yellow | Radiator Fan Relay (High) | Output | | C8 | C | White/Red | Fuel Pump Relay Control | Output | | C9 | C | Gray/Red | Turbo Wastegate Solenoid (EF-RL only) | Output PWM |
Key Note on Turbo Models (EF-RL): If you have a Daihatsu Copen L880 or Mira L9 with turbo, pins C8 and C9 are critical. The ECU modulates the wastegate solenoid to control boost (~0.6-0.8 bar stock). A missing ground on pin A3 will cause 0 boost.
| Pin No. | Wire Color (Typ) | Function | Description | | :--- | :--- | :--- | :--- | | 3 | Orange | #10 (Injector) | Injector Ground Trigger | | 4 | Blue/Red | IGT (Ignition) | Trigger signal to Igniter/Coil | | 5 | Gray | ISCC (Idle Control) | Idle Speed Control Coil (Closing) | | 6 | White/Blue | ISCO (Idle Control) | Idle Speed Control Coil (Opening) | | 7 | Black/White | FC (Fuel Pump) | Circuit Opening Relay Ground | | 8 | Yellow/Green | CHECK ENG | Check Engine Light Ground |