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Car scanners, also known as OBD-II scanners or code readers, are essential tools for accessing a vehicle's computer system. By doing so, they can read and erase diagnostic trouble codes (DTCs), providing valuable insights into a car's health and performance. Depending on functionality, budget, and other factors, there are several types of car scanners available.
Handheld OBD-II scanners
Handheld OBC-II scanners are compact and portable. They plug into the OBD-II port of a vehicle, usually located under the dashboard. These scanners read and clear DTCs, display real-time data, and perform basic diagnostics. Some handheld car scanners have a built-in display screen. In contrast, others may require a connection to a separate display device, such as a smartphone or tablet, to view the data on an app. Mechanics and car owners use handheld scanners because they are affordable and simple.
Professional OBD-II scanners
Professional OBD-II scanners are more advanced and have a wider range of diagnostic capabilities. They are designed for professional mechanics and automotive technicians. In addition to reading and clearing DTCs, professional OBD-II scanners perform advanced diagnostics, such as coding and programming keys, accessing live data streams, performing actuations and adaptations, and running special functions like oil reset or SAS calibration. They have larger screens, are more expensive, and are built for complex diagnostics.
Bluetooth OBD-II adapters
Bluetooth OBD-II adapters are small and portable. They connect to a car's OBD-II port and communicate with a smartphone or tablet via Bluetooth. The adapter and the mobile device work together to form a car scanner. The car scanner then uses specialized diagnostic software or apps to access the vehicle's data and perform diagnostics. Bluetooth OBD-II adapters are affordable and provide basic diagnostic functions, such as reading and clearing DTCs and live data monitoring. They are handy for DIY enthusiasts and are less costly compared to other types of car scanners.
OEM-specific scanners
OEM-specific scanners are designed for particular car manufacturers. They are developed by the vehicle manufacturer or licensed to provide comprehensive diagnostics and programming for their vehicles. OEM-specific scanners access all the vehicle's control modules, perform diagnostics, programming, and coding, and execute complex functions like key programming, module initialization, and firmware updates. They are essential for authorized dealerships and specialized automotive service centers. OEM-specific scanners are accurate and reliable but are generally more expensive than other car scanners.
Multibrand diagnostic tools
Multibrand diagnostic tools are designed to work with various vehicles from different manufacturers. These diagnostic tools are handy for independent workshops and automotive service providers dealing with different vehicle makes and models. Depending on the functionality, multibrand diagnostic tools can perform basic to advanced diagnostics, including reading and clearing DTCs, live data, coding, programming, and special functions. They provide flexibility and compatibility, making them a valuable investment for businesses.
When buying a car scanner, it is important to check its specifications, as they affect performance and ease of use. Here are some common car scanner specifications:
Diagnostic Coverage:
Some car scanners cover only a few car models, while others have a wider range. A scanner with a wider range can diagnose different models with accuracy.
Data Display:
Some scanners show live data in graphs, while others have a basic LCD. Graphing is better as it shows trends in live data.
Power Source:
Some scanners get power from the car's OBD port, while others have a rechargeable battery. Stand-alone scanners with batteries are portable and more convenient.
Update Capability:
Vehicle technology changes every day. A scanner with update capability will be relevant for many years. Some have one-time or lifetime updates, while others have annual updates.
Build Quality:
A robust scanner will last longer. Look for durable materials like rubber or ABS plastic. Also, consider the size and weight of the scanner. A portable and lightweight one is more convenient.
Additional Features:
Some advanced scanners have extra features like programming keys, resetting service lights, or performing module coding. These features are useful for businesses that offer many services.
It is also important to maintain a car scanner for longevity and accuracy. Here are some car scanner maintenance tips:
Regular Updates:
Always update the scanner's software. The updates may have new features and bug fixes. Follow the manufacturer's instructions to get the latest updates.
Cleanliness:
Keep the scanner and its connectors clean. A dirty scanner may give inaccurate readings. Use a soft, dry cloth to clean the scanner. Also, use compressed air to remove dust from the connectors.
Storage:
Store the scanner in a clean, dry place. Avoid areas with extreme temperatures or moisture. Use the provided case or a suitable alternative to prevent physical damage.
Check the Cables:
Inspect the scanner's cables for damage. Replace any broken cables immediately. Damaged cables may cause connection problems or inaccurate readings.
Follow the User Manual:
Always use the scanner as per the user's manual. Follow the maintenance tips in the manual. The manual may also have troubleshooting tips for common problems.
Choosing the right car scanner requires careful consideration of several factors, including:
It is always advisable to get a professional mechanic to help fix a faulty car scanner. However, it is possible to replace and repair a car scanner as long as the right tools are at hand. Below are some of the steps to follow when trying to replace a car scanner.
Identify and access the car scanner:
First and foremost, it is important to identify the kind of car scanner the vehicle has. After that, it won't be hard to access the car manual and know the steps to follow in accessing the car scanner.
Disconnect power:
once the vehicle's battery is located and identified, it is important to disconnect it to avoid any electrical damage or short circuiting while trying to replace the car scanner.
Remove the old scanner:
after ensuring that the vehicle's electrical system is safe and sound, the next step is to remove the old car scanner. This is done by loosening and removing the screws holding the car scanner in place. After that, gently pull out the car scanner from the dashboard.
Install the new scanner:
Now that the old car scanner has been removed, it is time to install the new one. First, connect the vehicle's electrical system and ensure it is perfectly working. After that, secure it in place using the screws and mounting brackets. Finally, reconnect the vehicle's electrical system and ensure everything is perfectly working.
Q1: How do I know if a car scanner is right for my vehicle?
A1: Check if the scanner's specifications match the requirements of the user's car. Consider compatibility with the car's make, model, and year.
Q2: What is the difference between OBD1 and OBD2 scanners?
A2: OBD1 is the first generation of onboard diagnostics used in cars before 1996. OBD2 is the second generation, more advanced, and used in cars after 1996. OBD2 scanners can read more data and perform more functions than OBD1 scanners.
Q3: Can a car scanner be used for any vehicle?
A3: No, only if the scanner is compatible with the car's diagnostic port and the car's communication protocols. Check the scanner's specifications to ensure compatibility.
Q4: What is live data, and why is it important?
A4: Live data is real-time information about the car's systems and parameters, such as speed, temperature, and pressure. It is important because it allows monitoring of the car's performance and detection of problems in real time.
Q5: What should be done if the car scanner gives an error code?
A5: Search for the error code on the internet to find out what it means and what actions are recommended. In many cases, the user can fix the problem by following the instructions. If the error persists or if the problem is serious, go to a car service for professional help.