If a grey 6 pin or 9 pin connector is inside, there is a good chance that this truck is using some form of the SAE J1708 specification. ![]() How to identify a truck using this standard? The most common way to identify if a truck is using the SAE J1708 standard is to look at the diagnostic connector inside the truck cab. Although not very fast (9600 bits per second), this network-enabled reliable data transmission by one node to all other nodes simultaneously. Similar to an RS-485 serial network, the SAE J1708 standard allowed automotive engineers to directly tie ECUs through the vehicle together using a single twisted wire pair backbone. For the sake of this article, we are limiting our definition to those heavy trucks relying on the SAE J1708 physical standard for accessing diagnostics. What is an “Older Truck”?īefore we dive in, let’s define what we mean by an “older” truck. This article focuses on how KeepTruckin overcame some of these challenges as well as the benefits a fleet manager might see by accessing these older interfaces. One of the key differentiating factors of the KeepTruckin ELD platform is its ability to natively support trucks of a wide range of ages through the support of a wide range of interface technologies without any additional hardware. The technologies used on these trucks lack many of the advancements engineers have come to rely on in modern network technology. ![]() This presents a unique challenge when developing an ELD platform for older heavy trucks. Over the past 20 years, a wide range of network communication standards have been used inside trucks, putting the onus on ELD vendors to connect to a wide variety of physical interfaces and communication protocols. Mandate rules clearly state that compliance requires ELDs to synchronize on data from the truck’s engine control module (ECM) or vehicle data bus for all model years dating back to 2000. With the emergence of the ELD mandate, trucks of all shapes, sizes, and ages have resulted in the need to install electronic logging systems into their cabs. How KeepTruckin made the ELD mandate work for old trucks
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