For auto repair professionals and car enthusiasts alike, the quest for the Best Scan Tool For Car That Can Read Everything is ongoing. In today’s vehicles, onboard computer systems are more complex than ever, controlling everything from the engine and transmission to safety features like airbags and ABS. When something goes wrong, you need a diagnostic tool that can access all these systems to pinpoint the problem accurately.
But what exactly does “read everything” mean, and which scan tools on the market truly live up to this expectation? This article dives into the world of comprehensive scan tools, exploring what they can do and highlighting some of the best options available, especially for those working on a range of vehicles, including older models.
Understanding What “Reading Everything” Really Means
In the context of automotive diagnostics, “reading everything” refers to a scan tool’s ability to access and interpret data from all available electronic control units (ECUs) or modules within a vehicle. This goes far beyond basic OBD-II engine code readers. A truly comprehensive scan tool should be able to:
- Read Engine (Powertrain) Codes: This is standard for all OBD-II scanners, covering engine and transmission related issues.
- Read Transmission Codes: Accessing the Transmission Control Module (TCM) to diagnose gearbox problems.
- Read ABS (Anti-lock Braking System) Codes: Essential for diagnosing braking system faults and ensuring safety.
- Read SRS (Supplemental Restraint System) / Airbag Codes: Crucial for diagnosing airbag and seatbelt pretensioner issues, another vital safety system.
- Read Body Control Module (BCM) Codes: Diagnosing issues with electrical components like windows, lights, wipers, and central locking.
- Read Chassis Control Codes: Accessing systems like electronic stability control (ESC), traction control, and suspension control.
- Read HVAC (Heating, Ventilation, and Air Conditioning) Codes: Diagnosing climate control system problems.
- Potentially Read Other Modules: Depending on the vehicle, this could extend to systems like navigation, infotainment, parking assist, and more.
Basic, entry-level scan tools often only focus on engine and transmission codes. Stepping up to a more advanced tool is necessary to truly “read everything” and get a complete picture of a vehicle’s health.
Key Features of a Scan Tool That Reads Everything
When searching for the best scan tool for car that can read everything, consider these essential features:
- Extensive Vehicle Coverage: The tool should support a wide range of makes and models, ideally including domestic, Asian, and European vehicles. For those working on older cars, compatibility with older protocols and vehicle years is crucial.
- All System Diagnostics: Ensure the scanner explicitly states its ability to read codes from all major vehicle systems (engine, transmission, ABS, SRS, BCM, etc.). Look for mentions of “full system scan” or “all module diagnostics.”
- Live Data Streaming: View real-time data from various sensors and modules to understand system operation and pinpoint intermittent faults.
- Bi-Directional Control (Active Tests): This advanced feature allows you to send commands to vehicle systems to test components, like activating relays, turning on lights, or cycling ABS pumps. While not always essential for “reading everything,” it significantly enhances diagnostic capabilities.
- Code Definitions and Troubleshooting Information: A good scanner provides clear code definitions and, ideally, offers troubleshooting tips or access to repair information.
- Regular Updates: Vehicle technology evolves rapidly. Choose a scan tool from a reputable brand that offers software updates to ensure compatibility with newer models and access to the latest features and fixes.
Recommended Scan Tool Brands and Models
While the “best” tool depends on your specific needs and budget, some brands are well-regarded for their comprehensive diagnostic capabilities. Based on expert feedback and user experiences, Autel stands out as a leading brand in this category.
Autel offers a range of scanners, from entry-level to professional-grade, many of which are designed to “read everything.” Specifically, models like the Autel MaxiSYS series (e.g., MS906BT, MS908, MS909, MS919) are known for their extensive vehicle coverage and all-system diagnostic capabilities.
As one experienced user noted about Autel scanners:
“All of these, although a little spendy, are excellent, cover almost every vehicle made and will tell you just about everything you want to know and then a little more. They all can read and diagnose all modules on your vehicle… All of these… can read and diagnose all modules on your vehicle, at least on the 05’s and above… I do know they will work on at least some OBDI vehicles. The ones I’ve had mostly advertise vehicles from 1996 and above.”
Older Autel models like the DS708 and MS906 (non-BT) are also mentioned as capable tools that can be found at potentially lower prices as newer models are released. These can be excellent options for those seeking a balance of comprehensive features and value.
Scan Tools for Older Vehicles (1999-2004 Chrysler/Dodge)
For users specifically asking about scan tools for older vehicles like 1999-2004 Chrysler and Dodge models, compatibility becomes even more critical. While many modern scanners advertise OBD-II compliance (generally vehicles from 1996 onwards), actual module coverage can vary.
When choosing a scan tool for older Chrysler or Dodge vehicles, it’s essential to:
- Verify Compatibility: Check the scan tool manufacturer’s website or compatibility lists to confirm support for the specific year, make, and model.
- Look for Protocol Support: Older vehicles may use different communication protocols than the latest CAN bus systems. Ensure the scanner supports the necessary protocols for these vehicles.
- Consider Used or Older Models: As mentioned, slightly older but still capable scanners like the Autel DS708 or MS906 might offer excellent value for older vehicle diagnostics.
The Importance of Updates for Long-Term Value
Investing in a scan tool that receives regular software updates is crucial for long-term value. Updates ensure:
- Coverage for Newer Vehicles: As manufacturers release new models, updates expand vehicle coverage to include them.
- Access to New Features and Functions: Updates often add new diagnostic capabilities, tests, and features.
- Bug Fixes and Performance Improvements: Software updates can address bugs and improve the overall performance and stability of the scan tool.
While some scan tools offer free updates for a limited period (e.g., one year), ongoing updates may require a subscription fee. Factor these costs into your decision when choosing a scan tool.
Conclusion: Choosing the Right Scan Tool for Comprehensive Diagnostics
Finding the best scan tool for car that can read everything requires careful consideration of your diagnostic needs, vehicle types you work on, and budget. While truly “reading everything” on every single vehicle might be an unrealistic expectation, advanced scan tools like those from Autel come remarkably close.
By focusing on all-system diagnostics, extensive vehicle coverage, essential features like live data and bi-directional controls (when needed), and the availability of updates, you can select a scan tool that empowers you to tackle a wide range of automotive diagnostic challenges effectively. For those working on a diverse range of vehicles, including older models, investing in a comprehensive scan tool is an investment in efficiency, accuracy, and ultimately, better auto repair outcomes.
