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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Newer vehicles with CAN protocol may be as fast as 2 minutes, while vehicles with CAN that have a lot of data to download will take well over an hour. There’s a special ACTIA service for each of our products, systems and solutions that answers j25534 customers’ needs closely. Note that a fee set by the OEM may apply.

Softing Automotive – PassThru (SAE J)

More than a requirement, quality is one of the ACTIA group’s true values, and is shared by all its employees in a certified environment. There is no published standard yet.

A J compliant device for ECU reprogramming is considered a vehicle interface. prootcol

Prevalent with European car makes, in some cases the OEM will require a direct connection between the vehicle, the in-shop PC running the reprogramming application software and the OEM server.

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. Support for timer values that are less than or greater than those specified in ISO see Figure 30 in Section 7. J framework includes application interfaces for the following functionality: This is dependent upon the make and model of vehicle. The range for potocol tests performed relative to ISO is —1. In a similar vein, the J API makes all “car communications” hardware look the same.


Consult OEM website guidance for minimum Internet connection specification requirements. The pdotocol time varies protocok 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.

Standards and Protocols

No multi-frame messages can be transmitted without matching a flow control filter. Return to normal speed after a break indication 6.

Protkcol an OEM cannot retroactively implement the J pass-through reprogramming solution with or without special cables, they must make available to equipment and tool companies any information needed to develop aftermarket equivalents of their OEM-specific reprogramming hardware and software. The default bus idle period before the interface shall transmit an address, shall be ms. Older vehicles without CAN can take anywhere from 15 to 60 minutes.

The pass-thru interface will not automatically handle tester present messages. Message Structure The following message structure will be used for all messages Transmit, Receive, Filters, and Periodics and indications.

J FAQs | Bosch Diagnostics

Each protocol has different voltage and timing requirements, so this is no trivial task. If ECU Reprogramming is practiced in the dealership, then it is the responsibility of each OEM to maintain and update their j25534 sites, and keep current applications available for download.

The following specifications clarify and, if in conflict with ISOoverride any related specifications in ISO Our experience and our expertise in the automotive and aeronautics sectors mean that our hardware and software designs provide a high level of quality.


A consumer had to rely on the car manufacturers dealership. Any non proocol dealership would have to invest several thousand dollars in obtaining specialised tools one per brand! The specified protocol type within the message structure is different from the protocol associated with the communications channel when it was opened.

These devices are not made by car manufacturers, but by any company that protocok an opportunity. The actual number of messages returned is in NumMsgs.

The application is required to handle any special timing requirements based on receipt of this response code, including stopping any periodic messages. Only the optional features will be described by this document. Each protocol has different voltage and timing requirements. The inventor of electronic diagnostics and a pioneer in the field of vehicle architecture, particularly multiplexed architecture, ACTIA innovates across its skills spectrum to stand out from the crowd, remain independent and maintain its leading position in the field.

The maximum sink current to be supported by the interface is mA.

If the ISO checksum is verified by the interface, and the checksum is incorrect, the message will be discarded. This interface also includes some capabilities that may not be required proyocol reprogramming, but allows the interface to be used for other purposes without placing a significant burden on the interface manufacturers.

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