The software does not connect directly to the car's OBD2 port on its own. Instead, it operates as part of a three-step bench-repair workflow: 1. Reading the Dump (Hardware Required)
| | CG100 Programmer (Hardware + Software) | AST (Airbag Service Tool) Software | | :--- | :--- | :--- | | Method of Connection | Direct bench connection to the airbag ECU (often requires soldering or using included probes) | Typically via the vehicle's OBD-II port | | Primary Use Case | Professional, high-volume repair shop; requires ECU removal for deep-level repairs | Quick diagnostics and reset for common vehicles | | Microcontroller Support | Extremely broad. Supports Renesas, NEC, Infineon Tricore, Freescale, and more | More limited; focuses on common SRS modules accessible via OBD | | Additional Functions | Includes Odometer correction, CAS key programming, BCM reading, ISN/VIN calculation | Primarily focused on SRS/airbag crash data clearing and DTC management | | Typical Price Range | $200–$500 USD (professional-grade) | $50–$150 USD (budget-friendly diagnostic option) |
Compared to earlier versions, v3.9 provides a more intuitive layout, helping technicians quickly select the vehicle make, model, and part number. How Airbag Service Tool v3.9 Works airbag service tool v3.9
The technician opens Airbag Service Tool v3.9 and imports the saved raw file. The user selects the correct vehicle make, model, and module part number from the software's menu. Clicking the or "Repair" button prompts the software to rewrite the lines of code containing the crash flags. The software then generates a new, cleaned file. 3. Writing the Cleaned Dump
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Reinstall the module in the vehicle. Connect a standard OBD2 scanner and clear any stored trouble codes. Then, turn the ignition to the "ON" position. If successful, the SRS light will illuminate for a few seconds during the bulb check and then turn off.
One of the most popular universal programmers for EEPROM and MCU reading. Supports Renesas, NEC, Infineon Tricore, Freescale, and more
: Can read and write "dumps" (data files) via CAN-bus, K-Line, or OBD2. Crash Data Removal
The Airbag Service Tool (AST) is a specialized software application designed to read, clear, and repair crash data stored within a vehicle's airbag control unit. Version 3.9 represents a mature release of this tool, widely regarded for its extensive database coverage and stability.