Wiring Diagram Daihatsu L9 Ecu Pinout !!top!! May 2026

For the Daihatsu L9 (Move) series, ECU pinouts vary significantly depending on whether you have the EJ-DE (1.0L 3-cylinder), EF-DET (660cc 3-cylinder turbo), or JB-DET (660cc 4-cylinder turbo) engine. Common Pinout Examples

Pinout information for these engines is often documented in service manuals and community technical guides. Below is a representative mapping for the common EJ-DE engine often found in L900 series models and their Perodua counterparts (Kelisa/Kenari). EJ-DE Pin (Example) Wire Color Switched 12V Light Green / Blue Constant 12V Earth/Ground White-Black RPM Signal Varies by ECU Model Often Green Fuel Pump Relay Pin 56 (Example) Technical Resources & Manuals

For precise wiring for your specific ECU model number (e.g., L68, EF-DET, etc.), refer to these detailed technical documents:

L9 ECU Wiring and Fuse Diagrams: A comprehensive circuit diagram for the junction block (J/B) and various relays.

EJ-DE Ignition System Guide: Specifics on ignition wiring and EFI systems.

JB-DET Service Manual: Detailed repair manual for the L9 turbo engines including wiring.

General Pinout Guides: Community-shared EF engine ECU pinout collections often include photos of the plugs and PCBs. Wiring Diagrams for Diagnostic Comparison

Could you provide the specific part number on your ECU sticker (e.g., 89560-XXXXX)? This will allow me to find the exact pin-by-pin mapping for your hardware. EF Engine ECU Pinouts - DIY or TECHNICAL - Live To Dai

* ECU1920×1920 138 KB. * PCB1920×1920 304 KB. * PCB Back1920×1920 310 KB. * Sockets1920×1920 265 KB. * Plugs1920×1920 275 KB. Live To Dai EJ-DE Ignition System Overview | PDF - Scribd

Understanding the Wiring Diagram and ECU Pinout for Daihatsu L9: A Comprehensive Guide

The Daihatsu L9 is a popular model of vehicle known for its reliability and efficiency. However, like any other vehicle, it requires proper maintenance and repair to ensure optimal performance. One of the most critical components of the Daihatsu L9 is the Engine Control Unit (ECU), which plays a vital role in controlling the engine's functions. In this article, we will discuss the wiring diagram and ECU pinout for the Daihatsu L9, providing a comprehensive guide for mechanics, technicians, and DIY enthusiasts.

What is an ECU Pinout?

The ECU pinout refers to the configuration of the pins on the ECU connector that connects to the vehicle's wiring harness. The ECU pinout is essential for understanding how the ECU communicates with other components of the vehicle, such as sensors, actuators, and other control units. A correct understanding of the ECU pinout is crucial for troubleshooting and repairing issues related to the engine control system.

Wiring Diagram Daihatsu L9 ECU Pinout

The wiring diagram for the Daihatsu L9 ECU pinout is a complex document that illustrates the connections between the ECU and other components of the vehicle. The diagram shows the pin configuration of the ECU connector, including the pin numbers, signal names, and the corresponding wiring harness connections.

The Daihatsu L9 ECU pinout typically consists of several connectors, including:

Connector A: This connector typically contains the power and ground connections, as well as the CAN bus lines.
Connector B: This connector usually contains the sensor and actuator connections, such as the crankshaft position sensor, camshaft position sensor, and fuel injector signals.
Connector C: This connector may contain additional sensor and actuator connections, such as the oxygen sensor, throttle position sensor, and ignition coil signals.

ECU Pinout Configuration

The ECU pinout configuration for the Daihatsu L9 may vary depending on the specific model year and engine type. However, here is a general overview of the common pinout configuration:

Power and Ground Connections:
- Battery voltage (B+): Pin 1 (Connector A)
- Ground (GND): Pin 2 (Connector A)
CAN Bus Lines:
- CAN high (CANH): Pin 3 (Connector A)
- CAN low (CANL): Pin 4 (Connector A)
Sensor Connections:
- Crankshaft position sensor (CKP): Pin 5 (Connector B)
- Camshaft position sensor (CMP): Pin 6 (Connector B)
- Oxygen sensor (O2): Pin 7 (Connector C)
Actuator Connections:
- Fuel injector 1 (INJ1): Pin 8 (Connector B)
- Fuel injector 2 (INJ2): Pin 9 (Connector B)
- Ignition coil 1 (IG1): Pin 10 (Connector C)

How to Read the Wiring Diagram

Reading the wiring diagram for the Daihatsu L9 ECU pinout requires a basic understanding of electrical circuits and signal flow. Here are some steps to follow:

Identify the ECU connector: Locate the ECU connector and identify the pin numbers and signal names.
Determine the signal flow: Follow the signal flow from the ECU to the corresponding component, such as a sensor or actuator.
Check the wiring harness: Verify the wiring harness connections between the ECU and the component.

Troubleshooting and Repair

The wiring diagram and ECU pinout are essential tools for troubleshooting and repairing issues related to the engine control system. Here are some common issues and possible causes:

Engine failure to start: Check the power and ground connections, crankshaft position sensor, and fuel injector signals.
Rough engine idle: Check the oxygen sensor, throttle position sensor, and ignition coil signals.

Conclusion

In conclusion, the wiring diagram and ECU pinout for the Daihatsu L9 are critical documents for understanding the engine control system. By understanding the pinout configuration and signal flow, mechanics, technicians, and DIY enthusiasts can troubleshoot and repair issues related to the engine control system. This comprehensive guide provides a general overview of the ECU pinout configuration and wiring diagram, but it is essential to consult the specific documentation for the vehicle model and year.

Additional Resources

For more information on the wiring diagram and ECU pinout for the Daihatsu L9, consult the following resources:

Daihatsu L9 repair manual: A comprehensive repair manual that includes wiring diagrams and ECU pinout information.
Daihatsu L9 technical service bulletin: A bulletin that provides technical information on specific issues and repair procedures.
Online forums and communities: Online forums and communities dedicated to Daihatsu L9 owners and enthusiasts can provide valuable information and insights.

By understanding the wiring diagram and ECU pinout for the Daihatsu L9, you can ensure optimal performance, efficiency, and reliability of your vehicle.

Daihatsu L9 (often associated with the Daihatsu Move L900 or L902 and the Perodua Kelisa/Kenari) uses several different Engine Control Unit (ECU) configurations depending on whether it's the EF-VE, EF-DET, or JB-DET engine.

Understanding the pinout is essential for engine swaps, wiring troubleshooting, or installing aftermarket electronics like turbo timers and piggyback controllers. Common Daihatsu L9 ECU Pinout Layouts

Detailed pinout data for these models is often found in technical repositories like the L9 ECU Wiring and Fuse Diagrams on Scribd and community forums such as Live To Dai. 1. Power and Ground Connections

For most Daihatsu L9-series ECUs (like the L902 JB-DET), the power supply pins are critical for basic operation: B+ (Battery Positive): Constant power for memory.

IGSW (Ignition Switch): Switched power that wakes up the ECU. E1 / E2 (Grounds): Main chassis and sensor grounds. 2. Sensor Inputs (Typical EF/JB Series) The ECU monitors these pins to adjust fuel and timing: MAP Sensor: Signal wire for intake manifold pressure.

WTS (Water Temp Sensor): Input for engine coolant temperature.

VSS (Vehicle Speed Sensor): Critical for idle control and transmission shifting. OX (Oxygen Sensor): Feedback for closed-loop fueling. 3. Output Actuators These pins send signals from the ECU to the engine: INJ 1, 2, 3: Pulsed grounds for the fuel injectors.

IGT / IGF: Ignition trigger and feedback signals for the coils.

ISCV (Idle Speed Control Valve): Controls the engine's idle bypass air. Wiring Identification wiring diagram daihatsu l9 ecu pinout

Daihatsu wiring harnesses typically use a standard color-coding system to help identify circuits without a multimeter:

Black/White or Black/Red: Often indicates switched ignition power. Brown: Frequently used for ground (Earth) circuits.

Blue/Yellow: Often associated with specialized sensor signals like the speed sensor. Troubleshooting and Resources

If you are performing a swap (such as putting an L902 JB-DET into a Perodua Kancil), you will need to match the L9 ECU pinout to the car's existing cabin harness.

Full Manuals: Comprehensive circuit diagrams for the junction block (J/B) and power distribution can be accessed via the Daihatsu ECU Wiring and Diagram Guide.

Video Guides: For visual learners, technical tutorials on platforms like TikTok show live wiring for L9/Avy turbo swaps.

Daihatsu ECU Wiring and Diagram Guide | PDF | Electrical Connector

Wiring Diagram and ECU Pinout for Daihatsu L9

The Daihatsu L9 is a popular model, and understanding its wiring diagram and ECU pinout is essential for any DIY enthusiast or mechanic looking to modify or repair the vehicle's engine control system. In this write-up, we'll provide an overview of the ECU pinout and wiring diagram for the Daihatsu L9.

ECU Overview

The Daihatsu L9 uses a multi-point fuel injection system, controlled by an Engine Control Unit (ECU). The ECU is responsible for monitoring and controlling various engine parameters, such as fuel injection, ignition timing, and emissions.

ECU Pinout

The ECU pinout for the Daihatsu L9 is as follows:

| Pin Number | Pin Name | Description | | --- | --- | --- | | 1 | BATT | Battery voltage supply | | 2 | IG | Ignition switch input | | 3 | ST | Starter motor input | | 4 | THA | Throttle angle sensor input | | 5 | THT | Throttle temperature sensor input | | 6 | IAT | Intake air temperature sensor input | | 7 | MAP | Manifold absolute pressure sensor input | | 8 | O2 | Oxygen sensor input | | 9 | COOL | Coolant temperature sensor input | | 10 | INJ1 | Fuel injector 1 output | | 11 | INJ2 | Fuel injector 2 output | | 12 | INJ3 | Fuel injector 3 output | | 13 | IGT | Ignition timing output | | 14 | ISC | Idle speed control output | | 15 | FP | Fuel pump output | | 16 | AC | Air conditioning compressor output | | 17 | FAN | Cooling fan output | | 18 | MIL | Malfunction indicator lamp output | | 19 | EGR | Exhaust gas recirculation valve output | | 20 | GND | Ground |

Wiring Diagram

The wiring diagram for the Daihatsu L9 ECU is complex and involves multiple connections to various engine sensors and actuators. Here's a simplified overview of the main connections:

Battery and Ignition: The ECU receives battery voltage (BATT) and ignition switch input (IG) from the vehicle's electrical system.
Engine Sensors: The ECU receives input from various engine sensors, including:
- Throttle angle sensor (THA)
- Throttle temperature sensor (THT)
- Intake air temperature sensor (IAT)
- Manifold absolute pressure sensor (MAP)
- Oxygen sensor (O2)
- Coolant temperature sensor (COOL)
Fuel Injectors: The ECU controls fuel injection through three output pins (INJ1, INJ2, INJ3), which connect to the fuel injectors.
Ignition Timing: The ECU controls ignition timing through the IGT output pin, which connects to the ignition coil.
Actuators: The ECU controls various actuators, including:
- Fuel pump (FP)
- Air conditioning compressor (AC)
- Cooling fan (FAN)
- Idle speed control (ISC)

Conclusion

In conclusion, understanding the wiring diagram and ECU pinout for the Daihatsu L9 is essential for any DIY enthusiast or mechanic looking to modify or repair the vehicle's engine control system. The ECU plays a critical role in controlling engine performance, and any modifications or repairs should be done with caution and attention to detail.

Disclaimer: The information provided in this write-up is for reference purposes only and should not be used as a substitute for professional advice or repair. Always consult a qualified mechanic or the vehicle's repair manual before making any modifications or repairs to the vehicle's electrical system.

Introduction

The Daihatsu L9 is a popular model of vehicle, and understanding the wiring diagram and ECU pinout is essential for any mechanic or DIY enthusiast looking to modify or repair the vehicle's electrical system. The Engine Control Unit (ECU) is the brain of the vehicle's engine, and it plays a crucial role in controlling the engine's performance, efficiency, and emissions. In this report, we will provide an overview of the wiring diagram and ECU pinout for the Daihatsu L9.

Wiring Diagram Overview

The wiring diagram for the Daihatsu L9 is a complex document that illustrates the electrical connections between various components of the vehicle's electrical system. The diagram shows the relationships between the ECU, sensors, actuators, and other electrical components. The wiring diagram is essential for troubleshooting electrical issues, installing aftermarket accessories, and modifying the vehicle's electrical system.

ECU Pinout Overview

The ECU pinout refers to the specific arrangement of pins on the ECU connector that correspond to specific electrical signals. The ECU pinout for the Daihatsu L9 is a 32-pin or 48-pin connector, depending on the specific model and year of the vehicle. The pinout includes signals for:

Sensor inputs (e.g., crankshaft position, camshaft position, coolant temperature)
Actuator outputs (e.g., fuel injectors, ignition coils, idle air control valve)
Communication interfaces (e.g., CAN bus, serial communication)
Power and ground connections

Daihatsu L9 ECU Pinout Details

The following is a detailed breakdown of the ECU pinout for the Daihatsu L9:

32-pin ECU Pinout:

| Pin # | Signal Name | Description | | --- | --- | --- | | 1 | BATT | Battery voltage | | 2 | GND | Ground | | 3 | IGN | Ignition switch | | 4 | CKP | Crankshaft position sensor | | 5 | CMP | Camshaft position sensor | | ... | ... | ... | | 32 | ISC | Idle speed control valve |

48-pin ECU Pinout:

Wiring Diagram and ECU Pinout Applications

Understanding the wiring diagram and ECU pinout for the Daihatsu L9 is essential for:

Troubleshooting electrical issues: By referencing the wiring diagram and ECU pinout, mechanics can diagnose and repair electrical problems, such as faulty sensors or actuators.
Installing aftermarket accessories: The wiring diagram and ECU pinout provide critical information for installing aftermarket accessories, such as performance chips, turbochargers, or audio systems.
Modifying the vehicle's electrical system: The wiring diagram and ECU pinout are essential for modifying the vehicle's electrical system, such as adding or removing components, or reprogramming the ECU.

Conclusion

In conclusion, the wiring diagram and ECU pinout for the Daihatsu L9 are critical documents for any mechanic or DIY enthusiast working with the vehicle's electrical system. By understanding the wiring diagram and ECU pinout, individuals can troubleshoot electrical issues, install aftermarket accessories, and modify the vehicle's electrical system. The information provided in this report serves as a general guide and may not be comprehensive or up-to-date. It is recommended to consult a reliable repair manual or manufacturer's documentation for specific details. For the Daihatsu L9 (Move) series, ECU pinouts

Recommendations

Consult a reliable repair manual or manufacturer's documentation for specific details on the wiring diagram and ECU pinout for the Daihatsu L9.
Use a multimeter and oscilloscope to verify electrical signals and diagnose issues.
Consult with a professional mechanic or electrical engineer if unsure about any aspect of the wiring diagram or ECU pinout.

Limitations

The information provided in this report is based on available data and may not be comprehensive or up-to-date.
The wiring diagram and ECU pinout may vary depending on the specific model and year of the Daihatsu L9.
This report is intended for general information purposes only and should not be used as a substitute for professional advice or diagnosis.

This is a tricky request because Daihatsu L9 refers to the Daihatsu Mira / Cuore L700 series (late 1990s–early 2000s), and ECU pinouts vary significantly by:

Engine code (e.g., EF-JL, EF-CL, EF-VE, KJet)
Transmission (manual vs automatic)
Market (Japan vs Europe vs Australia)
Emissions spec (Japan 4WD models have different ECUs)

I cannot generate a literal image/PDF, but I can give you a structured, searchable content block you can use for a blog post, video description, or repair guide. You would then add actual pinout diagrams (scanned factory manuals or hand-drawn tables).

Step 4 – Where to Find the Real Diagram

Search these exact phrases (preferably on a PC):

"Daihatsu L701 service manual" + ecu pinout
"Denso 175700-1580" pinout (replace with your number)
Forums: Auszoku, Daihatsu Drivers UK, Mira Club Japan

A real factory wiring diagram is legally required for repair. I strongly recommend buying the genuine workshop manual for your exact VIN.

Finding a precise wiring diagram and ECU pinout for the Daihatsu L9

series (commonly the Daihatsu Move L900/L902/L910) involves identifying your specific engine model, as pinouts differ significantly between the EF-VE (Naturally Aspirated) and EF-DET or JB-DET (Turbo) variants . Detailed technical guides and schematics are often archived on platforms like Scribd and enthusiast forums such as Live To Dai . Common ECU Pin Functions for L9 Series

Most Daihatsu EFI systems from this era share a core set of terminal labels. When inspecting the ECU connectors (typically from the wire side), you will often find these critical pins: Power & Ground: BATT / +B: Constant battery power for memory . IGN / IG1: Switched ignition power to activate the ECU . E1 / GND: Main chassis ground for the control unit . Sensor Inputs: PIM: Intake manifold pressure (MAP sensor) signal . THW: Engine coolant temperature signal . VC: 5V reference voltage output for sensors . SPD: Vehicle speed sensor input . Control Outputs: #10, #20, #30: Fuel injector trigger signals. IGT / IGF: Ignition trigger and fail-safe feedback signals. FP: Fuel pump relay control . Wiring & Inspection Tips

Connector Layout: Always verify if the diagram is viewed from the wire harness side or the ECU terminal side, as they are mirrored .

Color Codes: Daihatsu typically uses standard Japanese color coding. For example, W is White, B is Black, L is Blue, and Br is Brown . Composite colors (e.g., R-W) indicate a primary color with a secondary stripe

Diagnosis: You can often find full repair manuals, such as the EJ-VE EFI System Manual

, which provides step-by-step procedures for measuring terminal voltage using a multimeter .

Model Variations: The L902S (JB-DET) is a 4-cylinder turbo, while the L900S (EF-VE/DET) is a 3-cylinder. Ensure your pinout matches the cylinder count of your engine to avoid wiring errors .

Are you currently troubleshooting a no-start condition or performing an engine swap? EF Engine ECU Pinouts - DIY or TECHNICAL - Live To Dai

EF Engine ECU Pinouts * E1. * VC. * PIM. * THW. * N+ * IDL. * SPD. * Blank. * Blank. * Blank. Live To Dai Diagram ecu Aus and general spec utk M101 M201 J102 S221

This box can use your diagram. do you have any pinout's or wiring diagram for efdet? ada tak wiring diagram ecu l9 ef-det. Facebook·EFRL owner club

Daihatsu EJ-VE Engine ECU Manual | PDF | Throttle | Ignition System

For a comprehensive wiring diagram and ECU pinout for the Daihatsu L9

(often associated with the Move or engine swaps like the JB-DET), the most useful comprehensive "paper" is the L9 ECU Wiring and Fuse Diagrams (Scribd)

. This 336-page document provides detailed circuit diagrams for the junction block, power distribution, and engine control systems. ECU Pinout and Wiring Details

The Daihatsu L9 series, particularly those with the JB-DET or EF-series engines, typically follows these common pin configurations: EF Engine ECU Pinout (Common L9 Variant): Plug 1 (26 Pins):

Includes pins for Power (+B1, +B2), Ignition (IG), Injectors (INJ), Fuel Pump Control (FC), and various Grounds (E01, E02, E03). Plug 2 (16 Pins):

Includes pins for the Knock Sensor (KNK), Coolant Temp (THW), and Intake Air (VC). L9 JB-DET Specific Wiring Colors: Check Engine Light: Yellow with Black stripe. RPM Signal: Red with Yellow stripe. Speed Signal to ECU: Light Green with Red stripe. Black or White with Black stripe. Live To Dai Key Resources for Download Comprehensive Circuit Guide: Daihatsu ECU Wiring Pinout Guide offers 107 pages of electronic circuit and relay data. Instrument Cluster (Meter) Diagram: For wiring the dashboard to the ECU, the L9 RS Meter Diagram is essential for signal matching. Engine EFI System Manual:

For diagnostic and sensor voltage data (e.g., MAP sensor 4.5–5.5V), refer to the Daihatsu EJ-VE Engine ECU Manual to narrow down the exact pin locations? EF Engine ECU Pinouts - DIY or TECHNICAL - Live To Dai

For the Daihatsu Move L9 series, specifically models like the (EF-VE) or the performance-oriented

(JB-DET), the ECU pinout is critical for engine swaps or diagnostic work. The wiring configuration typically follows a multi-plug layout, often utilizing two or three main connectors (e.g., 22-pin and 12-pin or 26-pin and 22-pin combinations) depending on the exact engine and region. Common ECU Pin Functions

The following are standard pin assignments found in Daihatsu EF and JB engine families common to the L9 platform: Power & Ground Supply:

+B / +B2: Main ECU power supply from the EFI relay, active when the ignition is ON. BATT: Constant battery backup power for memory. E1 / E01 / E02: Primary engine grounds. Sensor Inputs: PIM: Intake manifold pressure (MAP sensor) signal. THW: Engine coolant temperature (ECT) sensor signal. THA: Intake air temperature (IAT) sensor signal. VTA / VTHO: Throttle position sensor (TPS) signal. SPD: Vehicle speed sensor (VSS) signal. Actuator Outputs: #10, #20, #30: Fuel injector triggers. IGT1, IGT2, IGT3: Ignition timing signals for the coils. FC / FC1: Fuel pump relay control. W: Check Engine Light (CEL/MIL) output. Wiring Harness Color Codes (L9 JBDET Example)

When identifying wires in the harness, you may encounter these common color codes used in the L900/L902 series: Green/White: Speed signal to ECU. Yellow/Black: Check Engine Light. Red/Yellow: RPM (Tachometer) signal. Blue/Yellow: Fuel gauge. White/Black: Common Ground. Critical Resources for Verification

For a complete, printable wiring diagram, you can access detailed technical manuals through these document repositories:

L9 ECU Wiring and Fuse Diagrams on Scribd provides over 300 pages of circuit layouts.

Daihatsu EJ-VE Engine ECU Manual from Scribd includes terminal voltage measurement procedures and system diagrams.

EF Engine ECU Pinouts on the Live To Dai community forum covers specific variations like the L200 EF-EL which share similar architecture.

Which specific L9 engine model (e.g., EF-VE 3-cylinder or JB-DET 4-cylinder) are you currently working on? L9 ECU Wiring and Fuse Diagrams | PDF - Scribd Connector A : This connector typically contains the

Understanding the wiring diagram and ECU pinout for the Daihatsu L9 series (specifically the Move L900/L901/L902) is essential for engine swaps, performance tuning, or electrical troubleshooting. The L9 generation typically features engines like the EF-VE (naturally aspirated), EF-DET (turbo), and the JB-DET (4-cylinder turbo). Overview of the Daihatsu L9 ECU System

The L9 series ECU functions as the brain for the Electronic Fuel Injection (EFI) system. Most L9 ECUs utilize a multi-connector setup (often labeled Connectors A, B, C, and D).

Engine Variants: Common engines include the 659cc EF-VE and EF-DET (3-cylinder) and the high-performance 659cc JB-DET (4-cylinder).

Key Features: These ECUs manage variable valve timing (DVVT) on certain models, sequential injection, and direct ignition systems. Typical ECU Pinout Configuration (L9 EJ-VE/EF Series)

While specific pin locations can vary slightly between the EJ-VE and EF-DET, most L9-series EFI ECUs follow this general structure for their main connectors: Power & Ground (Connector D/A)

These pins are critical for basic operation. If your car won't start, check these first.

+B / +B1 / +B2: Main power supply from the EFI relay (typically 12V with ignition ON). BATT: Constant battery power for memory backup. E1 / E01 / E02: Main chassis grounds. FC / FC1: Fuel pump relay control. Sensor Inputs (Connector B) These signals tell the ECU how the engine is performing. PIM: Manifold Absolute Pressure (MAP) sensor signal. THW: Engine Coolant Temperature (ECT) sensor. THA: Intake Air Temperature (IAT) sensor. VTH: Throttle Position Sensor (TPS) signal. OX1 / OX2: Oxygen sensor signals (Front and Rear). Actuator Outputs (Connector A) These pins allow the ECU to control engine components. #10, #20, #30: Injector control for cylinders 1, 2, and 3. IG1, IG2, IG3: Ignition signals (triggering the coils). ISC / ISCV: Idle Speed Control valve management. OCV+ / OCV-: Oil Control Valve for models with DVVT. Wiring Color Codes for L9 Series

When identifying wires in the harness, Daihatsu typically uses the following standard color conventions:

Black/Yellow (B-Y): Often used for Check Engine Light or Ignition signals.

Green/White (G-W): Frequently associated with the Speed Signal.

Yellow/Green (Y-G): Commonly used for the Temperature Gauge.

Blue (L): Often linked to the Fuel Gauge or Power Supply circuits. Safety & Troubleshooting Tips

Battery Disconnect: Always disconnect the negative battery terminal before removing or plugging in the ECU to prevent electrical surges.

Voltage Testing: Most sensor signals (like MAP or TPS) operate on a 5V reference. If you see 12V on these lines, there may be a short to the power rail.

Grounding: Ensure the ECU casing and the E1/E01 pins have solid continuity to the chassis, as poor grounding is a common cause of erratic idling.

For detailed schematics of specific sub-systems like the ABS or A/C, you can refer to specialized Daihatsu Service Manuals or Workshop Guides.

Are you planning an engine swap into a different chassis, or are you troubleshooting a specific sensor fault?

Daihatsu ECU Wiring Pinout Guide | PDF | Electronic Circuits

The Daihatsu "L9" typically refers to the L900 series Move, often powered by the EF-DET (Turbo) or EF-VE engines. Wiring these requires distinguishing between the ECU pinout (the computer's connections) and the meter/cluster wiring, as they are frequently modified together during engine swaps. Engine ECU Pinout (EF-DET / EF-VE)

The ECU for these models generally uses a multi-plug configuration. Below are common critical pin functions for the L9 series: Power & Ground: +B1 / +B2: Main ECU power supply (Ignition ON). BATT: Memory backup power (Constant 12V). E1 / E2 / Earth: Chassis and sensor grounds. Fuel & Ignition: #10, #20, #30: Injector pulse signals. FC / Fuel Pump: Triggers the Fuel Pump Relay (Active low).

IGT / IGF: Ignition trigger and feedback signals for the coils. Sensor Inputs:

PIM / MAP: Manifold Absolute Pressure sensor signal (essential for turbo L902S/L900S). THA / THW: Intake Air and Coolant Temperature signals. OX: Oxygen sensor signal for fuel trim.

VSPD: Vehicle Speed Sensor signal (vital for removing speed limiters or idle control). Meter and Cluster Wiring (L9 RS/JB-DET)

If you are performing a swap (e.g., into a Perodua Kancil), you will need the specific wiring for the L9 RS Meter Diagram. Key color codes for the L9 harness include: Yellow/Black: Check Engine Light (CEL). Red/Yellow: Tachometer (RPM) signal. Light Green/Red: Speed signal to the ECU. Yellow: Temperature gauge signal. Diagnostic & Safety Precautions

Tester Requirements: Use a high-impedance digital multimeter (>10k ohm/V) to avoid damaging the sensitive ECU internal circuits.

Static Discharge: The ECU is a precision electronic part; avoid touching pins directly to prevent static damage.

Battery Disconnection: Always disconnect the negative battery terminal before unplugging or plugging in the ECU. EFI SYSTEM

B. Fuel Pump Control

This is a common area for troubleshooting "Crank No Start" issues.

The fuel pump is controlled by the FC (Fuel Cut) pin on the ECU.
Wiring:
1. Battery +12V goes to the Fuel Pump Relay (Circuit Opening Relay).
2. Relay output goes to Fuel Pump + terminal.
3. ECU Pin FC grounds the Relay coil.
Logic: The ECU grounds the relay for 2-3 seconds when the key is turned ON (Prime) and continuously when the ECU detects RPM signals (Cranking/Running).

Diagnostic port & fault codes

Many Daihatsu ECUs use ISO9141/K-Line or OBD-II (depending on year). Diagnostic pin often connects to K-line on ECU (see Pin 26 example).
To read codes: use an appropriate OBD reader or ISO/K-line scanner. For older models, you may also retrieve codes via flashing LED or grounding a test connector — consult model-specific manual.

Detailed L9 ECU Pinout Table

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.

| 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.

The Complete Guide to the Daihatsu L9 ECU Pinout & Wiring Diagram

If you are working on a Daihatsu L9—whether it’s the Mira, Move, or the iconic Copen (L880)—understanding the wiring diagram and ECU pinout is critical for diagnostics, engine swapping, or repairing a no-start condition. The L9 series represents a generation of Daihatsu’s 3-cylinder EF-series engines (EF-VE, EF-DET, and the turbocharged EF-RL). The Engine Control Unit (ECU) manages everything from fuel injection to ignition timing and turbo boost control.

In this article, we will break down the complete Daihatsu L9 ECU pinout, explain wire functions, common issues, and how to read the schematic for troubleshooting.

3. Standard Pinout Configuration (Reference Guide)

Note: Always verify with a multimeter. Pin locations can vary between Automatic (A/T) and Manual (M/T) transmissions.

Daihatsu Move L9 (L150/L160)

Additional connector for CVT transmission control.
Pins B11-B14 are for transmission range and oil temp.
Wiring note: If you swap a manual into an auto Move, you must ground the park/neutral input or the ECU will limit RPM to 4,000.