DonosHome AT500 OBD2 Scanner User Manual

1. Introduction

Thank you for choosing the DonosHome AT500 OBD2 Scanner. This powerful and compact diagnostic tool is designed to help you understand and resolve common vehicle issues, perform emissions checks, and monitor your car's health with ease. It provides accurate diagnostic information, empowering you to conduct minor vehicle maintenance and confirm mileage from the comfort of your home.

What's in the Box:

• AT500 OBD2 Scanner
• User Manual

2. Setup Guide

Connecting your AT500 OBD2 Scanner to your vehicle is a straightforward process. Ensure your vehicle's ignition is in the 'ON' position (engine not necessarily running) to allow the scanner to communicate with the vehicle's onboard computer.

Connecting the Scanner:

1. Locate your vehicle's OBD-II port. This is typically found under the dashboard on the driver's side, often near the steering column or foot pedals. Refer to your vehicle's owner's manual if you have difficulty locating it.
2. Plug the 16-pin OBD2 connector from the AT500 scanner firmly into your vehicle's OBD-II port.
3. Once connected, the scanner will power on automatically. If it does not, ensure the vehicle's ignition is on.

3. Operating the Scanner

The AT500 features a user-friendly interface with a 3.2-inch LCD color screen and a 7-key interface for easy navigation. The main menu provides access to all diagnostic functions.

Menu Navigation:

• Use the UP/DOWN arrow buttons to scroll through menu options.
• Press the OK button to confirm a selection or enter a submenu.
• Press the ESC button to return to the previous screen or exit a function.
• The I/M button provides quick access to I/M Readiness status.

4. Key Features and Functions

4.1 Diagnostic Functions

• Read & Erase Codes: Easily determines the cause of the Check Engine Light (MIL). Retrieves generic (P0, P2, P3, and U0) and manufacturer specific (P1, P3, and U1) codes. Displays DTC definitions on the unit screen.



• I/M Readiness: Conducts comprehensive pre-state emissions checks. Shows results as 3 lights for faults: red (permanent fault), yellow (temporary fault), or green (no faults).



• Live Data Stream: Reads live PCM datastream, including engine speed, coolant temperature, and other items. Displays 212 live data streams with graphical and textual views.



• Freeze Frame Data: View Freeze Frame data to see vehicle conditions at the moment a fault code was set.
• O2 Sensor Test: Performs O2 Sensor Tests. Over 50% of smog or emission test failures are caused by malfunctioning O2 sensors.
• On-Board Monitor Test: Supports On-Board Monitor Tests, allowing users to check vehicle conditions and components related to emissions.
• EVAP System Test: Checks the Evaporative Emission Control System.
• DTC Lookup: Built-in DTC lookup library with over 30,000 codes to help you understand the fault area the code refers to.
• Vehicle Information: Retrieves Vehicle Identification Number (VIN), Calibration ID (CALID), and Calibration Verification Number (CVN).

4.2 Battery & Charging System Test

• Voltmeter Function: Displays real-time battery voltage and battery level indicator.



• Cranking System Test: Analyzes the state of the cranking system, displays cranking voltage and cranking time, and graphs the waveform of the cranking.
• Charging System Test: Analyzes the state of the charging system, displays ripple, unload, and load voltage, and draws ripple test waveform.

4.3 Compatibility & Interface

• Wide Compatibility: Supports 9+ protocols compatible with all cars since 1996 OBD II & CAN compliant US, European, and Asian vehicles.



• Multi-language Support: 11 languages built into the system (EN, FR, IT, ES, DE, PT, NL, PO, RU, FI, TR).
• Vivid Display Screen: Features a 3.2-inch LCD color screen (pixel 320x240) for clear display of information.



• Compact Design: Small, rugged horizontal case with a comfortable hand-held terminal.
• Long Cable: 95cm long and thick flexible insulator cable with 16PIN OBD2 plug for convenient use.

5. Maintenance

To ensure the longevity and optimal performance of your DonosHome AT500 OBD2 Scanner, follow these simple maintenance guidelines:

• Cleaning: Regularly wipe the device with a soft, damp cloth. Avoid using abrasive cleaners or solvents that could damage the screen or casing.
• Storage: Store the scanner in a cool, dry place away from direct sunlight, extreme temperatures, and excessive humidity. Keep it in its original packaging or a protective case when not in use.
• Cable Care: Avoid bending or crimping the OBD2 cable excessively. Store the cable neatly coiled to prevent damage to the internal wires.
• Connector Protection: Keep the OBD2 connector free from dirt, dust, and moisture. Use the protective cap if provided, or store it in a clean environment.

6. Troubleshooting

If you encounter issues while using your AT500 OBD2 Scanner, refer to the following common troubleshooting tips:

Common Issues & Solutions:

• Scanner Does Not Power On:
  • Ensure the OBD2 connector is securely plugged into the vehicle's port.
  • Verify that the vehicle's ignition is in the 'ON' position (or engine running, depending on the function).
  • Check the vehicle's fuse for the OBD-II port (usually labeled 'CIGAR' or 'AUX POWER').
• Communication Error:
  • This often occurs if the vehicle's ignition is not in the 'ON' position. Turn the ignition to 'ON' (do not start the engine unless required for a specific test).
  • Ensure the vehicle is OBD-II compliant (1996 or newer for US vehicles).
  • Check for any loose connections or damaged cables.
  • Try the scanner on a different OBD-II compliant vehicle to rule out a scanner issue.
• No Codes Found / Incorrect Readings:
  • Confirm the Check Engine Light (MIL) is actually illuminated on your dashboard.
  • Ensure the vehicle's ignition is 'ON' or the engine is running for live data.
  • Some intermittent issues may not set a permanent code immediately.

7. Specifications

8. Warranty Information

DonosHome products are manufactured to the highest quality standards. This product comes with a standard manufacturer's warranty against defects in materials and workmanship. Please retain your proof of purchase for warranty claims.

For specific warranty terms and conditions, or to initiate a warranty claim, please contact DonosHome customer support.

9. Customer Support

If you have any questions, require technical assistance, or need support with your DonosHome AT500 OBD2 Scanner, please do not hesitate to contact our customer support team. We are dedicated to providing professional support to ensure your satisfaction.

Contact Information:

• Please refer to the contact details provided on the product packaging or the official DonosHome website for the most up-to-date support information.