Snap-on would like to place cookies on your computer or mobile device to help us make this website better and to analyze your use. To find out more about the cookies, see our privacy policy.

I accept cookies from this site



The Sun Commercial Diagnostics Unit from Snap-on is a popular tool among technicians who work on vehicles in the truck and trailer market, as well as on buses and light commercial vehicles.

It utilises a guided diagnostics system to give you all of the information you need to diagnose today’s complex jobs, while the latest features added include detailed interactive wiring diagrams and repair time estimation.

The unit provides detailed information about error codes and ECU technical data, along with the ability to perform functional tests on a wide range of areas, and the calibration of components – allowing you to complete a repair from start to finish rather than needing dealer assistance for the calibration.

With extensive software coverage, a user-friendly interface and easy navigation, coupled with wireless and touchscreen technology, the Sun Commercial Diagnostics Unit is the most powerful device of its kind on the market today and brings you a wide range of benefits:

  • Support for all commercial vehicle standards and protocols
  • A quick and intuitive software interface
  • Systems and error codes are automatically detected
  • Symptom-based troubleshooting
  • Wiring diagrams and technical information
  • Regular updates to keep pace with technological developments
  • Optional Electronic Test Module (ETM)
  • Repair time estimation
  • Two-year warranty
  • 12 months of online software upgrades (three upgrades per year; updates are chargeable after first 12 months)
  • Electronic applications guide with coverage by manufacturer - click here for the latest list of manufacturers
  • Optional agricultural vehicle coverage can be added to trucks, buses, trailers and light commercials - click here for more details


  • Vehicle ID by Number Plate – easily access the history and data of a vehicle you have worked on previously simply by entering its registration number, avoiding time-consuming searches
  • System Detection – detects only the systems that are specific to your vehicle and reads for errors, meaning you haven’t got to spend time looking through data that might not be relevant
  • Direct Access to Special Functions – Saving you time by getting to the options you need fast
  • System Display and Virtual Instruments – real-time data can be compared against known good measurements
  • Interactive Wiring Diagrams – detailed diagrams show you how systems are configured and let you easily access technical data and advice to help speed up your diagnosis
  • Repair Times – provides an estimated time required to complete a repair, meaning you can give a more accurate estimate of the cost of the work to the customer
  • Relevant Technical Data and Procedures – frequently-used vehicle data and procedures are grouped together for easy access
  • Detailed Technical Information – a complete solution helping you identify errors, parts, locations and more for every vehicle covered using images, diagrams, graphs and data
  • Troubleshooting by Symptoms – using detailed step-by-step guides to help you diagnose and fix the problem

Commercial Diagnostics Product Literature

Got Questions?


Contact our Customer Care Department:


Tel: (01553) 692422

Fax: (01553) 697254

Mon - Fri 8:45 am-5pm

For Snap-on Tools or to contact your local dealer, call (01536) 413800


Please wait while we gather your results.


Snap-on is a trademark of Snap-on Incorporated.

All other marks are trademarks of their respective holders.

©2017 Snap-on Incorporated. All Rights Reserved.

Got Questions?

Contact our Customer Care Department


Tel: (01553) 692422

Fax: (01553) 697254

For Snap-on Tools

or to contact your local dealer

call (01536) 413800