Do you work with trucks, trailers, buses and light commercial vehicles? If so, the specialised Sun Commercial Diagnostics Unit from Snap-on is the tool for you.


The Commercial Diagnostics Unit 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.


It 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.


The updated system is built to be light and thin yet powerful and rugged, providing optimal performance and durability in the workshop.



  • 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: Use detailed step-by-step guides to help you diagnose and fix the problem
    • Expert mode
    • Date- and time-stamped programming and coding
  • Optional agricultural vehicle coverage: Extends the range of vehicles a workshop can deal with
  • Reprogram ECUs on expert mode (not applicable to all makes and models): Takes away the requirement for a separate tool to carry out this work

The Sun Commercial Diagnostics Unit is updated three times a year to ensure that it is armed with all of the latest information to deal with the new vehicles coming on to the market.

Your first three updates are included in the price of your unit and all subsequent updates are chargeable after the first 12 months.

Each update brings with it additional manufacturer and system coverage so that the unit’s capabilities are always on track with the latest developments.

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Got Questions?


Contact our Customer Care Department:


Tel: (01553) 692422

Mon-Fri 8.45am-5pm


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



Software Subscription enquiries:

(01536) 413825 and choose option one


Mon-Fri 8.30am-5pm


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

All other marks are trademarks of their respective holders.

© 2020 Snap-on Incorporated. All Rights Reserved.

Got Questions?

Contact our Customer Care Department


Tel: (01553) 692422


For Snap-on Tools

or to contact your local dealer

call (01536) 413800



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