Description
Xinfaxian • OBD2 automotive diagnostic tool v311
The Xinfaxian V311 OBD2 Automotive Diagnostic Tool is a professional-grade code reader designed for engine and emission diagnostics in OBD2/EOBD-compliant vehicles. Powered by a robust STM32F103VET6 processor, the tool operates safely over a wide voltage range (DC 8–36 V) with built-in protection against overcurrent and overvoltage, making it suitable for use on cars, SUVs, and light trucks. Key features include a 2.8-inch color LCD display for clear live data readouts, waveform display, data storage and playback, emission system status checks, and diagnostics for current, pending, and permanent fault codes. With broad protocol coverage and multilingual support, the instrument meets the needs of both independent technicians and informed car owners. The V311 is ideal for users who require reliable fault detection, emissions readiness monitoring, and sensor data visualization in one handheld unit.
Key benefits
- Reads and clears error codes (current, pending, permanent) and switches off the Check Engine Light
- Displays real-time data stream and sensor values, including RPM, coolant temperature, fuel trim, throttle position, waveform view and playback
- Wide operating voltage (DC 8–36 V), rugged build with overcurrent/overvoltage protection
- Compatible with most cars compliant with OBD2/EOBD standards from 1996 onward
- Multilingual menus and clear color LCD to support diverse users
Supported protocols
- SAE J1850 PWM (41.6 Kbaud)
- SAE J1850 VPW (10.4 Kbaud)
- ISO 9141-2 (5-baud init, 10.4 Kbaud)
- ISO 14230-4 KWP (5-baud init, 10.4 Kbaud)
- ISO 14230-4 KWP (fast init, 10.4 Kbaud)
- ISO 15765-4 CAN (11-bit ID, 500 Kbaud)
- ISO 15765-4 CAN (29-bit ID, 500 Kbaud)
- ISO 15765-4 CAN (11-bit ID, 250 Kbaud)
- ISO 15765-4 CAN (29-bit ID, 250 Kbaud)
Supported functions
Depending on vehicle compatibility, the following functions are supported:
- Reading and erasing diagnostic trouble codes (DTCs), including current, pending, permanent
- Viewing real-time data streams and waveform graphs of sensor parameters
- I/M readiness check for emissions system status
- Freeze-frame data capture (snapshot when fault occurs)
- Vehicle information display, including VIN and calibration IDs
Included items
- 1 × diagnostic tool main unit (Model V311)
- 1 × OBD2 connection cable
- 1 × user manual
Supported languages
English, French, German, Spanish, Chinese, Portuguese, Italian, Russian

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