Honda Jazz MK3 GG I-VTEC SI 10 REG AU002 Engine Control Unit Ecu 1.2 i 1198 cc Petrol L12B1 2008 - 2012 5 Speed Manual 5 Door Hatchback GG57 AU000001-AU099999

Honda Jazz MK3 GG I-VTEC SI 10 REG AU002 Engine Control Unit Ecu 37820-RB2-G13:9Z22-910:218913 1.2 i 1198 cc L12B1 5 Speed Manual GG57 AU000001-AU099999 2008,2009,2010,2011,2012 Petrol Mark3 I-VTEC SE MK3 10 REG 89bph

Additional Info

1. ECU Overview

ECU Part Numbers:

• 37820-RB2-G13 / 9Z22-910 / 218913
• Engine: 1.2L L12B1 (1198cc, 89bhp)
• Transmission: 5-Speed Manual
• Vehicle Model: Honda Jazz MK3 (GG17) I-VTEC SE
• Production Years: 2008–2015
• Fuel Type: Petrol
• VIN Range: MGG1 9S200001–9S299999

ECU Functions:

The Engine Control Unit (ECU) manages key aspects of engine performance, fuel efficiency, and emissions compliance.

1. Fuel Injection Control

   • Controls the electronic fuel injectors for an optimal air-fuel mixture.
   • Works with MAP (Manifold Absolute Pressure) sensor and O2 sensors.

2. Ignition Timing Adjustment

   • Controls spark timing for maximum power and efficiency.
   • Prevents pre-ignition (knocking).

3. Variable Valve Timing (VTEC) Control

   • Adjusts valve timing and lift to improve fuel efficiency and power.
   • Works with camshaft and crankshaft position sensors.

4. Electronic Throttle Control (ETC)

   • Adjusts throttle body opening electronically based on driver input.

5. On-Board Diagnostics (OBD-II)

   • Monitors engine sensors and logs Diagnostic Trouble Codes (DTCs).

6. Emission Control System

   • Works with catalytic converter and oxygen sensors to reduce emissions.

7. Idle Speed & Airflow Regulation

   • Adjusts idle speed based on engine temperature and load.

8. Engine Load & Knock Detection

   • Adjusts engine load parameters to prevent misfires and protect internals.

2. ECU Installation Process

Pre-Installation Precautions

• Disconnect the Battery: Prevents electrical damage and ECU reset issues.
• Ensure ECU Compatibility: The replacement ECU must match the part number.
• Use an ESD Strap: Protects against static electricity damage.

Installation Steps

1. Locate the ECU:

   • Typically found behind the glove box or under the dashboard.

2. Remove the Old ECU:

   • Unplug all wiring harness connectors.
   • Unscrew the ECU from its mounting bracket.

3. Install the New ECU:

   • Secure it in the original mounting location.
   • Reconnect the electrical connectors properly.

4. Reconnect the Battery and perform the ECU adaptation procedure.

5. ECU Reprogramming & Immobilizer Reset (if required):

   • Some ECUs require reprogramming using Honda HDS (Honda Diagnostic System).
   • The immobilizer system may need to be re-synchronized with the new ECU.

6. Perform a System Check:

   • Use an OBD-II scanner to check for error codes and verify proper installation.

3. Safety Precautions

• Avoid Water & Moisture: The ECU is sensitive to water damage.
• Secure Wiring Harness: Loose connections can cause communication failures.
• Match ECU Software Version: A mismatch may lead to engine performance issues.
• Perform Idle & Throttle Relearn: Ensures smooth idling and throttle response.

4. Common Fault Codes (DTCs) & Troubleshooting

The ECU stores DTCs (Diagnostic Trouble Codes) when an issue is detected.

5. Clearing Fault Codes

After diagnosing and fixing the issue, follow these steps to clear DTCs:

Using an OBD-II Scanner (Honda HDS or Generic Scanner)

1. Connect the OBD-II scanner to the diagnostic port (under the dashboard).
2. Turn the ignition ON (without starting the engine).
3. Scan for error codes using the OBD-II scanner.
4. Select "Clear Codes" to erase stored DTCs.
5. Restart the engine and verify that no warning lights reappear.

Manual ECU Reset (Battery Disconnect Method)

1. Disconnect the battery (-) terminal and wait for 15–30 minutes.
2. Press and hold the brake pedal for 30 seconds (to discharge stored power).
3. Reconnect the battery and turn the ignition ON.
4. Start the engine and let it idle for 10 minutes.
5. Test drive the car and check for warning lights.

6. Fitment in the Car & Communication with Other Modules

ECU Location:

• Typically located under the dashboard, behind the glove box.

Communication with Other Modules:

The ECU communicates via the CAN Bus system with:

1. Instrument Cluster – Displays engine warning lights and diagnostic messages.
2. ABS & Traction Control System – Regulates engine power during wheel slip.
3. Immobilizer (IMMO) – Ensures only authorized keys can start the vehicle.
4. Throttle Body & Sensors – Adjusts throttle response and fuel injection.
5. Airbag Module – Works with engine management during crash events.

7. Summary

This guide provides all necessary details for installing, troubleshooting, and maintaining the Honda Jazz MK3 (GG17) ECU (37820-RB2-G13). Let me know if you need further assistance! ??