device and allows any J compliant PassThru device to connect to any vehicle network. PassThru Device Physical and Data Link Layer Protocol Support . J Recommended Practice for Pass-Thru Vehicle Programming Last Protocols Supported by a fully compliant SAE J Device. PassThru+ XS 2G is the only device fully compliant to J & J Recommended and tested by major OEM’s, the PassThru+ XS 2G device is a VCI .

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No multi-frame messages can profocol transmitted without matching a flow control filter. Older vehicles without CAN can take anywhere from 15 to 60 minutes. Additionally, the specification includes a provision that allows OEMs to use the J reprogramming method on through model year vehicles as long as OEMs make all necessary additional hardware i. A device requires a Windows-based PC on which the reprogramming application software operateswith a USB or Ethernet port, and an internet connection for Internet access to obtain reprogramming application software pdotocol calibration files.

If an OEM cannot comply with J by model yearthey may request one year additional extension to become J compliant. What is an API?

Standards and Protocols

Yes, J reprogramming application software typically does not incorporate diagnostic Scan Tool functions that must be utilized to perform post-reprogramming tasks such as clear DTCs or re-learn procedures.

The application and the printer driver communicate via an API.

Consult OEM website proocol for minimum Internet connection specification requirements. Powertrain, Engine, Transmission, Throttle Controller and is mandatory on all vehicles from model year and forward.

J FAQs | Bosch Diagnostics

J pass-thru reprogramming is only required for emissions based ECUs eg. These devices are not made by car manufacturers, but by any company that sees an opportunity.

In a similar vein, the J API makes all “car communications” hardware look the same. A device alone is not enough to lrotocol the ECU’s.


Always one start bit and one stop bit. This factor places the freelance dealership in a non competitive position which ultimately will impact a consumers’ freedom of dealership choice.

If the echoed byte received doesn’t match the transmitted byte, or if after a period of T1 no response was received, the transmission will be terminated. The software must be sold ‘for a reasonable price’, which will probably be a few hundred dollars. The programming time varies among vehicles based on communication speed of the protocol used, calibration file size, total number of calibration files, the number of ECUs to reprogram, and Internet connection latter is dependent on OEM.

It is rooted in the group’s international dimension, which provides each and every one of our customers with local support that’s synonymous with proximity, fast response and flexibility. How to find the best web hosting service for business websites.

Only the optional features will be described by this document. This protocol can be used to handle any custom CAN messaging protocol, including custom flow control mechanisms. The actual number of messages returned is in NumMsgs. Note that a fee set by the OEM may apply. 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 applications available for download.

The application is required to handle any special timing requirements based on receipt of this response code, including stopping any periodic messages.

The next data byte shall not be sent until the echo byte has been received and verified. The application needs to handle tester present messages when required. The Software The EPA is forcing car manufacturers to release software that updates the firmware on their cars. Periodic messages will not be suspended during transmission or reception of a multi-frame segmented message.


It is sometimes necessary to reprogram ECU’s to regulate and repair cars equipped with OBD systems which are do not conform with pollution emission values. Through close and intensive cooperation with our customersas well as a prltocol that protofol based on quality and innovation, the company has become the market leader in its core business.

Passthru+ XS 2G & J protocol

What is J and J? Any non franchise dealership would have to invest several thousand dollars in obtaining specialised tools one per brand! Newer vehicles with CAN protocol may be as fast as 2 minutes, while vehicles protoxol CAN that have a lot of data to download will take well over an hour.

This software application can be delivered on Internet or on a CD according to the manufacturer. The pass-thru interface will not automatically handle tester present messages. High-speed Internet connection is highly recommended. No work has been initiated for the J conformance test cases. Message Structure The following message structure will be used for all messages Transmit, Receive, Filters, and Periodics and indications.

Where do I get the ECU reprogramming calibrations from? Return to normal speed after a break indication. There is no published standard yet. Even though each printer has different hardware.

The total message size in bytes is the DataSize, and includes header bytes, ID bytes, and data bytes. Each protocol has different voltage and timing requirements, so this is no trivial task. The interface is not required to support baud rate detection based on the synchronization byte.

Return to normal speed after a break indication 6. I always recommended BlueHost Reviews for my clients. It also expands the scope of what a J device can do.