The connection between the PC and the J hardware can freely chosen by the manufacturer of the device i. We helped invent J, created the first tool ever to use it, and work with OEMs around the globe to continue improving the technician’s experience. How do you know for sure that they programmed the computer? Increased shop capabilities means more business for you! This could cause computer failure. This application will have complete information of the ECUs that are supported by the application.

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This application also includes a user interface where choices can be made depending on the ECU and what action to perform.

You will receive links to download 3 versions. The PC application will send messages in the earlier determined protocol format to the hardware tool which buffers the messages and transmits the messages in the order they were received.

Make sure your computer is fully charged if using a laptop passthrh, or plug it in to an AC source. Each manufacturer of a J tool hardware device must have a DLL-file which includes functions and routines for communicating with the PC. If you continue to use passhhru site we will assume that you are happy with it. Most modern cars can now be reprogrammed using the J standard.

Newer vehicles with CAN protocol may be as fast as j25344 minutes, while vehicles with CAN that have a lot of data to download will take well over an hour.


If ECU reprogramming is practiced in the dealership, then it is the responsibility of each OEM to maintain and update their own sites, and keep current calibrations available for download. Installation CD with device driver J compatible.

Vehicle diagnostics, key programming and key learning software

Getting the initial mechanics of the process can be challenging, but with practice, attention to detail, repetition, and continual reading to stay updated on procedures, it can become as easy as building a 4L60E. Also shop in Also shop in. A New Twist Keith Clark. Software Keys are included. J supports the following protocols:.

What is J2534?

Had tech2 working in 5 mins! Our Assist Pass-Thru expert technicians walk you through the process using vehicles in your repair shop. PassThruWriteMsgs Write message s to a protocol channel. For most manufacturers, you can access this information for free, although you may have to read the fine print to find where they hide their information. Because of the success and ease of J some manufacturers have now begun to offer factory diagnostics as well as reprogramming capabilities.

The application provided by the vehicle manufacturers use commands described in J standard to connect to a hardware tool of any brand. A vehicle repair workshop that wants to analyze and re-program vehicles from different manufactures must have an API for each.


The J hardware interface should have enough memory to buffer 4Kb of transmit messages and 4Kb of received messages. Every vehicle manufacturer has a tool for analyzing and reprogramming their product, and this tool is often expensive.

If their vehicles only use i. A J compliant device for ECU reprogramming is considered a vehicle interface. Your email address will not be passfhru. Skip to main content. You may also like.

Pass-Thru – Autologic Diagnostics

The connection and initialization gives the hardware tool information of which protocol that is used. Sorry, your blog cannot share posts by email. Some ECUs sends a lot of messages with short period of time between each message.

This pass-thru device translates messages sent from the PC into messages of the protocol being used in the vehicle ECU. This makes it difficult for a car, bus or truck workshop to analyze and repair all kind of vehicles.

There are many Vehicle manufactures and almost as many different communication protocols. No Line Rise after a Rebuild October 21, Both work hand in hand with the scan tool!