Autel scanners are powerful diagnostic tools that help mechanics and car enthusiasts understand and resolve vehicle issues. This comprehensive guide provides a step-by-step walkthrough on how to use an Autel scanner, from connecting it to your car to interpreting the codes.
Locating the OBD2 Port
Most cars manufactured after 1996 have an OBD2 port, a 16-pin connector usually located under the driver’s side dashboard, near the steering column. Consult your vehicle’s owner’s manual if you can’t find it.
Connecting the Autel Scanner
With your car turned off, connect the Autel scanner to the OBD2 port using the provided cable. For Bluetooth scanners, pair the device with your car. Refer to your scanner’s manual to determine whether the ignition should be in the ON or accessory position before proceeding. A proper connection allows the scanner to communicate with the car’s computer.
Entering Vehicle Information
Some Autel scanners require you to input your car’s Vehicle Identification Number (VIN) before generating codes. You can usually find the VIN on a sticker on the driver’s side dashboard, near the windshield. The scanner might also request other details like engine and model type.
Accessing OBD Codes
Navigate the scanner’s menu to select the desired car system for diagnosis. The scanner will then display active and pending codes. Active codes illuminate the check engine light, while pending codes indicate potential issues that haven’t yet triggered a warning.
Understanding OBD Codes
OBD codes consist of a letter followed by four digits.
- P (Powertrain): Issues with engine, transmission, or emissions.
- B (Body): Problems with airbags, power steering, or seat belts.
- C (Chassis): Concerns related to brakes, suspension, or ABS.
- U (Undefined): Issues not categorized under P, B, or C.
The digits further specify the problem area and nature. For example, P0301 indicates a misfire in cylinder 1. Record the displayed codes before disconnecting the scanner.
Diagnosing and Resolving Issues
While an Autel scanner identifies the problem codes, it doesn’t provide repair instructions. Consult a repair manual or seek professional help for accurate diagnosis and repair.
Resetting the Check Engine Light
After resolving the issue, the check engine light might stay on. Use the Autel scanner’s reset function to turn it off. However, if the problem persists, the light will reappear.
Autel Scanner Features
Autel scanners offer various features beyond code reading and erasing, including:
- Live data stream
- Freeze frame data
- Oxygen sensor test
- Component testing
- Vehicle information (VIN, CID, CVN)
High-end models may include advanced functions like oil reset, EPB service, SAS calibration, BMS reset, and DPF regeneration. Mastering the use of an Autel scanner empowers you to maintain your vehicle effectively and address issues promptly.
