How To Use Autel Scanner: A Comprehensive Guide

Using an Autel scanner is essential for modern car diagnostics and maintenance. Are you looking to decipher those cryptic check engine lights and understand what’s going on under the hood of your car? Then look no further. This guide from CARDIAGTECH.NET will provide a step-by-step breakdown of how to use an Autel scanner effectively, empowering you to diagnose issues, maintain your vehicle, and potentially save money on costly repairs. Get ready to learn about OBD II protocols, diagnostic trouble codes (DTCs), and live data streaming!

1. Understanding Autel Scanners: An Overview

Autel scanners are powerful diagnostic tools used by mechanics and car enthusiasts alike. These scanners help you communicate with your vehicle’s computer to identify problems and perform maintenance tasks. Understanding the different types of Autel scanners and their capabilities is the first step toward effective car care.

1.1. Types of Autel Scanners

Autel offers a wide range of scanners to suit different needs and budgets. Here’s a breakdown of some popular series:

Autel MaxiSYS Series: These are high-end, comprehensive diagnostic systems designed for professional mechanics. They offer advanced features like bi-directional control, coding, and programming.
Autel MaxiCheck Series: These scanners focus on specific maintenance tasks, such as oil resets, electronic parking brake (EPB) resets, and tire pressure monitoring system (TPMS) resets. They’re ideal for shops specializing in certain services.
Autel AutoLink Series: These are entry-level scanners perfect for DIY enthusiasts and car owners who want basic diagnostic capabilities. They can read and clear trouble codes, view live data, and perform I/M readiness tests.
Handheld Scanners: Compact and easy to use, these scanners are perfect for quick diagnostics on the go.
Flatbed Scanners: Offering a larger display and more features than handheld models, flatbed scanners are ideal for comprehensive diagnostics in the shop.
Bluetooth Flatbed Scanners: These scanners connect wirelessly to your smartphone or tablet, providing flexibility and convenience.

1.2. Key Features of Autel Scanners

Autel scanners come packed with features that can help you diagnose and repair your car. Here are some of the most common:

Read and Clear Codes: Identify diagnostic trouble codes (DTCs) that indicate problems with your car and clear them after repairs are made.
Live Data Stream: View real-time data from your car’s sensors, such as engine temperature, RPM, and vehicle speed.
I/M Readiness: Check if your car is ready for an emissions test.
Freeze Frame Data: View data recorded when a fault code was triggered, providing valuable insights into the problem.
Oxygen Sensor Test: Test the performance of your oxygen sensors.
Vehicle Display Test: Check the functionality of your car’s display screen.
Component Testing: Activate and test individual components, such as fuel injectors and solenoids.
Vehicle Information: Access vehicle identification number (VIN), calibration identification (CID), and calibration verification number (CVN).
Special Functions: High-end scanners offer advanced features like oil reset, EPB reset, SAS reset, BMS reset, ABS brake bleed, and DPF regeneration.
Bi-Directional Control: Also known as active testing, this feature allows you to send commands to your car’s components to test their functionality.
Battery Testing: Check the health of your car’s battery and charging system.

1.3. OBD I vs. OBD II Protocols

Understanding the difference between OBD I and OBD II protocols is crucial for using an Autel scanner effectively.

OBD I (On-Board Diagnostics I): This was the first generation of on-board diagnostic systems. It was primarily used on cars manufactured before 1996. OBD I systems were not standardized, meaning each manufacturer had its own diagnostic connector and codes.
OBD II (On-Board Diagnostics II): This is the standardized diagnostic system required on all cars sold in the United States after 1996. OBD II systems use a standard 16-pin diagnostic connector and a common set of diagnostic trouble codes. This standardization makes it easier to diagnose and repair cars, regardless of the manufacturer.

2. Step-by-Step Guide: How to Use an Autel Scanner

Now, let’s dive into the practical steps of using an Autel scanner to diagnose your car’s problems.

2.1. Step 1: Locating the Diagnostic Link Connector (DLC)

The first step is to find the DLC, also known as the OBD II port. This is a 16-pin connector typically located under the dashboard on the driver’s side.

Location: Look for it near the steering column, often covered by a small door or bezel.
Vehicle Manual: If you can’t find the DLC, consult your car’s user manual for its exact location.

2.2. Step 2: Connecting the Autel Scanner to the DLC

Once you’ve located the DLC, follow these steps to connect your Autel scanner:

Turn Off the Car: Make sure your car is turned off before connecting the scanner.
Connect the Scanner: Plug the OBD II connector cable into the DLC. If you’re using a Bluetooth scanner, plug the scanner directly into the OBD II port.
Follow Instructions: Check the scanner’s instructions to determine whether the car should be in the “ON” position or in “idle mode” after connecting. Following the correct procedure is essential to avoid damaging the scanning tool application.
Confirm Connection: Turn the car to the specified mode and confirm that the scanner is communicating with the car’s computer. The scanner should display a message indicating a successful connection to the OBD II system.

2.3. Step 3: Entering Vehicle Information

After connecting the scanner, you may need to enter some vehicle information.

Vehicle Identification Number (VIN): Many scanners require you to enter the VIN to accurately diagnose the car.
- Location: The VIN can usually be found on a sticker in the lower corner of the windshield on the driver’s side, under the hood near the latch, or on the front of the frame.
Other Details: The scanner may also request other details, such as the engine type and model year.

2.4. Step 4: Accessing the Scanner Menu and OBD Codes

With the scanner connected and the vehicle information entered, you can now access the scanner menu.

Navigate the Menu: Use the scanner’s buttons or touchscreen to navigate to the menu screen.
Select Car Systems: Choose the specific car system you want to diagnose, such as the engine, transmission, or ABS.
View Codes: The scanner will display any active and pending diagnostic trouble codes (DTCs) for the selected system.

Active Codes: These codes trigger the check engine light, indicating an immediate problem.
Pending Codes: These codes indicate potential problems that may not yet be severe enough to trigger the check engine light. Recurring pending codes can become active codes if the problem persists.

The display of OBD codes varies depending on the scanner model. Some scanners show only the problematic DTCs, while others allow you to choose which OBD2 codes to view.

2.5. Step 5: Identifying and Understanding OBD Codes

Once the OBD codes are displayed, you need to interpret them. Each fault code consists of a letter followed by four digits.

Decoding the Letters:
- P (Powertrain): Indicates a problem with the engine, transmission, ignition, emissions, or fuel system.
- B (Body): Indicates problems with airbags, power steering, or seat belts.
- C (Chassis): Indicates a problem with the axle, brake fluid, or anti-lock braking system.
- U (Undefined): Highlights issues that do not fall into categories P, B, and C.
Decoding the Numbers:
- The first number after the letter indicates whether the DTC is generic (0) or manufacturer-specific (1).
- The second number refers to a specific vehicle component.
- The last two digits specify the exact problem.

Write down the OBD code displayed by the scanner and switch off the car. Then, carefully unplug the OBD II scanning tool. If your scanner supports it, you can transfer the OBD code to your laptop via USB cable or Bluetooth for further research.

2.6. Step 6: Diagnosing the Trouble Code

An OBD scanner tells you what’s wrong with your car, but it doesn’t tell you how to fix it. You need to diagnose the trouble code to determine the root cause of the problem.

Research the Code: Use online resources, repair manuals, or consult with a mechanic to understand the specific meaning of the OBD code.
Check Symptoms: Pay attention to any symptoms your car is exhibiting, such as rough idling, poor fuel economy, or unusual noises.
Inspect Components: Visually inspect the components related to the OBD code, looking for signs of damage, wear, or leaks.

Based on your research and inspection, you can decide whether to attempt a DIY repair or seek professional help. If you’re not comfortable working on your car, it’s always best to take it to a certified mechanic to avoid costly mistakes.

2.7. Step 7: Resetting the Check Engine Light

Once you’ve resolved the problem with your car, the check engine light should turn off after a period of driving. However, you can also use the Autel scanner to reset the check engine light immediately.

Access Reset Function: Go to the main menu of the OBD2 reader and find the “Check Engine Lights” or “Erase Codes” option.
Reset the Code: Follow the scanner’s instructions to reset the code. This usually involves pressing a “Reset” or “Erase” button.
Confirm Reset: Wait a few seconds or minutes for the engine light to turn off.

Important Note: If the underlying problem is not resolved, the check engine light will come back on, even after resetting the code.

3. Advanced Features of Autel Scanners

Beyond basic code reading and clearing, Autel scanners offer a range of advanced features that can help you diagnose and repair complex car problems.

3.1. Live Data Streaming

Live data streaming allows you to view real-time information from your car’s sensors. This can be invaluable for diagnosing intermittent problems or monitoring the performance of specific components.

Access Live Data: Navigate to the “Live Data” or “Data Stream” option in the scanner menu.
Select Parameters: Choose the specific parameters you want to monitor, such as engine temperature, RPM, fuel trim, and oxygen sensor readings.
Analyze Data: Observe the data as you drive or operate the car. Look for any unusual readings or patterns that could indicate a problem.

3.2. Bi-Directional Control (Active Testing)

Bi-directional control, also known as active testing, allows you to send commands to your car’s components to test their functionality. This can be useful for diagnosing problems with actuators, solenoids, and other electronically controlled devices.

Access Bi-Directional Control: Navigate to the “Bi-Directional Control” or “Active Test” option in the scanner menu.
Select Component: Choose the specific component you want to test, such as a fuel injector, EGR valve, or ABS pump.
Follow Instructions: Follow the scanner’s instructions to activate the component and observe its response.

3.3. Special Functions

High-end Autel scanners offer a variety of special functions that can help you perform specific maintenance tasks.

Oil Reset: Reset the oil life monitoring system after an oil change.
EPB Reset: Retract the electronic parking brake calipers for brake service.
SAS Reset: Calibrate the steering angle sensor after wheel alignment.
BMS Reset: Register a new battery with the battery management system.
ABS Brake Bleed: Cycle the ABS pump to bleed air from the brake lines.
DPF Regeneration: Initiate a diesel particulate filter (DPF) regeneration cycle.

3.4. Considerations for Specific Car Brands

While OBD II is a standardized system, some car manufacturers use proprietary codes and diagnostic procedures. High-end Autel scanners often include enhanced diagnostic capabilities for specific car brands, such as BMW, Mercedes-Benz, and VAG (Volkswagen Audi Group). These enhanced capabilities can provide more detailed information and access to advanced functions.

4. Choosing the Right Autel Scanner

With so many Autel scanners available, it’s important to choose the right one for your needs and budget.

4.1. Factors to Consider

Budget: Autel scanners range in price from a few hundred dollars to several thousand dollars.
Features: Consider the features you need, such as code reading, live data streaming, bi-directional control, and special functions.
Car Brands: If you primarily work on specific car brands, choose a scanner with enhanced diagnostic capabilities for those brands.
Professional vs. DIY: Professional mechanics need comprehensive scanners with advanced features, while DIY enthusiasts can often get by with entry-level models.

4.2. Popular Autel Scanner Models

Here are a few popular Autel scanner models to consider:

Model	Features	Target Audience
Autel MaxiSYS MS906BT	Comprehensive diagnostics, bi-directional control, coding, and programming, wireless connectivity	Professional mechanics, advanced DIY enthusiasts
Autel MaxiCheck MX808	Code reading, live data streaming, special functions (oil reset, EPB reset, etc.), easy to use	DIY enthusiasts, small repair shops
Autel AutoLink AL319	Basic code reading, I/M readiness, freeze frame data, affordable	DIY enthusiasts, car owners
Autel MaxiCOM MK906BT	Advanced diagnostics, ECU coding, active test, complete special functions, OE-Level diagnostics for more than 80 US, Asian and European vehicles, superior version of MS906BT	Professional technicians, automotive repair shops, and advanced DIYers
Autel MaxiTPMS TS508	TPMS diagnostics and service, sensor activation, relearn procedures, compatible with most TPMS sensors	Tire shops, repair shops offering TPMS services, car owners with TPMS issues

5. Why Choose CARDIAGTECH.NET for Your Autel Scanner Needs?

At CARDIAGTECH.NET, we understand the importance of having reliable and accurate diagnostic tools. That’s why we offer a wide selection of Autel scanners to meet the needs of every car enthusiast and professional mechanic.

5.1. Extensive Selection of Autel Scanners

We carry a comprehensive range of Autel scanners, from entry-level models for basic code reading to high-end diagnostic systems with advanced features like bi-directional control and ECU coding. Whether you’re a DIYer looking to save money on car repairs or a professional mechanic in need of a powerful diagnostic tool, we have the perfect Autel scanner for you.

5.2. Competitive Pricing and Exclusive Deals

At CARDIAGTECH.NET, we believe that everyone should have access to high-quality diagnostic tools at an affordable price. That’s why we offer competitive pricing on all of our Autel scanners. Plus, we frequently run exclusive deals and promotions to help you save even more money.

5.3. Expert Advice and Support

Choosing the right Autel scanner can be a daunting task, especially with so many models and features to consider. That’s where our team of expert advisors comes in. We have years of experience in the automotive diagnostic industry, and we’re here to help you find the perfect Autel scanner for your specific needs and budget.

5.4. Fast Shipping and Hassle-Free Returns

We know that when you need a diagnostic tool, you need it fast. That’s why we offer fast shipping on all of our Autel scanners. And if for any reason you’re not satisfied with your purchase, you can return it for a full refund or exchange.

5.5. Superior Customer Service

At CARDIAGTECH.NET, we’re committed to providing our customers with the best possible shopping experience. From expert advice to fast shipping and hassle-free returns, we’re here to make sure you’re completely satisfied with your purchase.

6. Maintaining and Updating Your Autel Scanner

To ensure your Autel scanner continues to perform accurately and reliably, it’s important to maintain and update it regularly.

6.1. Software Updates

Autel releases regular software updates for its scanners. These updates can include new features, bug fixes, and enhanced diagnostic capabilities.

Check for Updates: Connect your scanner to a computer with an internet connection and use the Autel update software to check for available updates.
Install Updates: Follow the on-screen instructions to install the updates.

6.2. Cleaning and Storage

Keep your Autel scanner clean and store it in a safe place when not in use.

Cleaning: Use a soft, dry cloth to clean the scanner’s screen and housing. Avoid using harsh chemicals or abrasive cleaners.
Storage: Store the scanner in a cool, dry place away from direct sunlight and extreme temperatures.

6.3. Battery Care

If your Autel scanner has a rechargeable battery, follow these tips to prolong its life:

Charge Regularly: Charge the battery fully before using the scanner for the first time.
Avoid Overcharging: Don’t leave the scanner plugged in after the battery is fully charged.
Store Properly: If you’re not going to use the scanner for an extended period, store it with the battery partially charged.

7. Common Issues and Troubleshooting

Even with proper use and maintenance, you may encounter issues with your Autel scanner. Here are some common problems and how to troubleshoot them:

7.1. Scanner Won’t Connect to Vehicle

Check the Connection: Ensure the OBD II connector is securely plugged into the DLC.
Verify Power: Make sure the vehicle’s ignition is turned on.
Check Compatibility: Verify that the scanner is compatible with the vehicle’s make and model.
Inspect the DLC: Check the DLC for any damaged or bent pins.

7.2. Unable to Read Codes

Select the Correct System: Make sure you’ve selected the correct system to scan (e.g., engine, transmission, ABS).
Check for Updates: Ensure the scanner’s software is up to date.
Try a Different Vehicle: If possible, try connecting the scanner to another vehicle to see if the problem persists.

7.3. Scanner Freezes or Locks Up

Restart the Scanner: Try turning the scanner off and then back on.
Check for Updates: Ensure the scanner’s software is up to date.
Contact Support: If the problem persists, contact Autel’s customer support for assistance.

7.4. Inaccurate or Incorrect Data

Verify Vehicle Information: Double-check that you’ve entered the correct vehicle information (VIN, model year, etc.).
Check Sensor Readings: Compare the scanner’s sensor readings to known good values or specifications.
Update Software: Ensure the scanner’s software is up to date.

8. Frequently Asked Questions (FAQs) About Autel Scanners

Here are some frequently asked questions about using Autel scanners:

What is an Autel scanner used for?
- Autel scanners are used to diagnose problems with cars by reading diagnostic trouble codes (DTCs) from the vehicle’s computer. They can also be used to monitor live data, perform component testing, and reset maintenance lights.
Are Autel scanners worth the money?
- Yes, Autel scanners are worth the money, especially for DIY enthusiasts and professional mechanics. They can save you time and money by allowing you to diagnose and repair car problems yourself.
How do I update my Autel scanner?
- To update your Autel scanner, connect it to a computer with an internet connection and use the Autel update software to check for available updates. Follow the on-screen instructions to install the updates.
Can an Autel scanner program keys?
- Yes, some high-end Autel scanners have key programming capabilities. However, this feature is typically only available on professional-grade scanners.
Do Autel scanners work on all cars?
- Autel scanners that support OBD II protocols will work on all cars sold in the United States after 1996. However, some scanners may have limited functionality on certain makes and models.
How accurate are Autel scanners?
- Autel scanners are generally very accurate, but their accuracy depends on several factors, including the quality of the scanner, the accuracy of the vehicle’s sensors, and the user’s skill in interpreting the data.
Can I use an Autel scanner to reset my check engine light?
- Yes, you can use an Autel scanner to reset your check engine light after you’ve resolved the underlying problem.
What is the difference between an Autel scanner and a code reader?
- An Autel scanner is a more advanced diagnostic tool than a basic code reader. Scanners offer features like live data streaming, bi-directional control, and special functions, while code readers typically only read and clear codes.
How often should I update my Autel scanner?
- You should update your Autel scanner whenever new software updates are available. Autel typically releases updates several times a year.
Where can I buy an Autel scanner?
- You can buy Autel scanners from CARDIAGTECH.NET, as well as other online retailers and automotive parts stores.

9. Conclusion: Empowering You with Autel Scanner Knowledge

Mastering how to use an Autel scanner can revolutionize the way you approach car maintenance and repairs. From understanding OBD codes to performing advanced diagnostic tests, the knowledge and skills you’ve gained will empower you to take control of your car’s health. Remember to choose the right scanner for your needs, maintain it properly, and consult with professionals when needed.

Ready to take your car diagnostic skills to the next level? CARDIAGTECH.NET offers a wide range of Autel scanners and expert support to help you get the job done right. Don’t let car problems keep you off the road – invest in an Autel scanner today!

For expert advice and support on choosing the right Autel scanner for your needs, contact CARDIAGTECH.NET today!

Address: 276 Reock St, City of Orange, NJ 07050, United States
WhatsApp: +1 (641) 206-8880
Website: CARDIAGTECH.NET

Let us help you find the perfect Autel scanner to keep your car running smoothly and efficiently. Contact us now and experience the CARDIAGTECH.NET difference!