Before diagnosing the J1587/J1708 datalink, check the fuses and the battery voltage and be sure the ECU connections are secure on the datalink, as well. or no ABS ABS and check engine lamp on inability to retrieve faults codes from an ECU the off-board diagnostic tool will at connect to the vehicle one or more ECUs missing from the diagnostic tools J1587 ECU list. Symptoms of a malfunctioning J1587 Datalink may include the following conditions: gauges at working ICU displays no J1587 no Eng.

The J1587 pins will be in the 9-pin diagnostic connector at Pin F, which is dark green color J1587 + and Pin G, which is orange color J1587. In the context of vehicle repair, the terms J1708 and J1587b are used interchangeably. J1587 refers to the SAE standard for messaging protocol that communicates on the J1708 network. J1708 refers to the SAE standard for the physical part of the datalink, such as wiring and electronic components. The J1587 datalink is a low-speed datalink that communicates information between the electronic control units on the vehicle. This will be a two-part article, this month we will look at the J1587/J1708 Datalink. Most vehicles with multiplexing will have two datalinks in common, the J1587/1708 datalink and the J1939 datalink, which are the primary datalinks for chassis and powertrain control. The multiplexing system serves three main functions: It transmits multiple electronic messages through the same wire at the same time it performs tasks and monitors components simultaneously it uses electronic control units to operate the system, interpreting different messages being transmitted on the same wire.

Convert cat data link to j1939