In this post, we’ll demonstrate how to perform ECM data read and write operations on the HONDA 38770-MFJ-A02 ECM using OBDSTAR MOTOMASTER. This procedure is suitable for technicians who need to back up, clone, or restore ECU data safely and efficiently.
Required Tools:
MOTOMASTER (or KEYMASTER G3)
High-power DC regulated power supply
Main cable
ECU clone jumper
MP001 programmer
HONDA 38770-MFJ-A02 ECM
Software Preparation
Before proceeding, ensure that the device's software is up to date with the latest version.
1. Tap [ECU Flasher] >> [ECM]
2. Use the search box in the top-right corner to quickly locate the corresponding ECM model
3. Enter the [Guide] section and carefully review:
Warm reminders
Menu descriptions
Operation steps
Connection methods
Special notes
This step ensures correct operation and helps avoid unnecessary risks.
Pinout and Connection Setup
1. Tap [Pinout]
2. Select [BENCH] mode
3. Verify that the ECM appearance matches the displayed module
4. Tap [Connector Pinout] and connect all wires strictly according to the pinout diagram
Correct wiring is critical for stable communication and successful data operations.
ECM Data Reading (Backup)
1. After completing all connections, tap [Start]
2. Establish the ECU connection
3. Perform a data backup first (strongly recommended)
4. Customize the file name as needed
5. The file storage location will be displayed on the left side of the screen
Backing up original data ensures data safety and allows recovery if needed.
ECM Data Writing
1. Select the previously backed-up data file
2. Write the data into the ECM module
3. The file management system supports filtering by:
File name
Modification time
File size
4. Once writing is completed, the operation is finished successfully
Video Reference:
For a complete step-by-step demonstration, please watch the video below:
For more professional automotive diagnostic tools and programming solutions, visit www.obd2shop.co.uk.
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