This article provides a step-by-step guide on how to reset the crash data stored in the SRS airbag control module (part #77960-TVA-A460-M4) for 2018-2021 Honda Accord vehicles using the Xhorse Multi-Prog Programmer, allowing you to clear the airbag warning light after a deployment or fault.
Disclaimer: This procedure involves sensitive safety systems. Perform at your own risk. A faulty repair can lead to airbag failure. Always verify the part number matches 77960-TVA-A460-M4.
Required Tools & Files
Tool: Xhorse Multi-Prog
Software: Multi-Prog Software (with Honda SRS support)
Files: A known-good “clean” D-Flash file (64KB) from a non-crashed module.
Equipment: Soldering iron, fine gauge wire, Torx and 10mm sockets.
Step 1: Remove the SRS Module
- Disconnect the vehicle’s battery and wait 10+ minutes.
- Locate the SRS module under the center console.
- Remove the safety clip and unplug the electrical connector.
- Unbolt the module (10mm bolts) and carefully remove it from the vehicle.
Step 2: Prepare the Module for Reading/Writing
- Open the metal casing of the SRS module to access the main PCB.
- Identify the correct chip and solder points. The target is the R7F701021 microchip.
- Solder wires to the necessary points on the PCB as per the diagram below.
Wiring Diagram for Xhorse Multi-Prog:
| Multi-Prog Pin | Wire Color (Example) | Function |
| VCC | Red | Power |
| GND | Black | Ground |
| TXD | Purple | Data Transmit |
| RXD | Blue | Data Receive |
| RST | Green | Reset |
| CLK | Brown | Clock |
Always double-check the pinout against the chip’s datasheet and your specific board layout.
Step 3: Read & Backup Original Data (CRITICAL)
- Connect the wires to your Xhorse Multi-Prog.
- In the software, select: Device -> Honda(Airbag) -> Accord-SRS (2019).
- Perform a full backup (READ) of all accessible memory areas:
C-Flash
D-Flash (Most Important for Crash Data)
C-Test
D-Test
- SAVE these files securely. This is your backup if anything goes wrong.
Step 4: Write the Clean Data
The goal is to overwrite the crash data in the D-Flash with a clean file.
- Source a Clean D-Flash File:
- Extract it from a known-good donor module (preferred method).
- Use a paid online reset service (e.g., carprog.online).
- In Multi-Prog, select WRITE.
- Load your clean D-Flash file (the 64KB .bin file).
- Execute the write command. The process will erase and reprogram the chip.
- Optional but Recommended: Also write the clean C-Flash file if you have it.
Note: Some memory areas (like C-Shadow) may be locked and cannot be written. This is normal. The D-Flash is the primary target for resetting crash data.
Step 5: Verify and Reinstall
- Desolder the wires and carefully reassemble the SRS module.
- Reinstall the module into the vehicle and reconnect the battery.
- Turn the ignition ON. The airbag light should illuminate briefly and then turn OFF, indicating a successful reset.
- Use a professional scanner to check for any active SRS fault codes and confirm all system checks pass.
Troubleshooting & Tips
- “Connection Fail” Error: Check your solder connections; they are the most common point of failure. Ensure wires are secure and not shorting.
- Software Detects Crash After Write: Some online file analyzers may give false positives. The true test is the airbag light behavior in the vehicle.
- File Source: Using a file from an identical part number module is crucial. Files are often VIN-specific, but a clean state can be written.
- Always work on a stable, static-free surface and handle the PCB carefully.
By following this guide, you can successfully reset the crash data on a Honda Accord SRS module, turning off the airbag light and restoring the vehicle’s safety system.