Structural characteristics and working principle of DB15 to 9 pin J1939 and 6 pin J1708 splitter Y cables

Structural characteristics and working principle of DB15 to 9 pin J1939 and 6 pin J1708 splitter Y cables

DB15 to 9 pin J1939 and 6 pin J1708 splitter Y cable is a special cable used in the field of automotive electronic diagnosis and communication. The following is an introduction to it:

Structural characteristics

Interface type: One end is DB15 interface, usually with 15 pins and a trapezoidal shape, commonly used to connect various automotive electronic devices or diagnostic tools. The other two ends are a 9 pin J1939 interface and a 6 pin J1708 interface. The J1939 interface is generally circular, with a 9 pin layout following the SAE J1939 standard, used for high-speed data communication between heavy vehicles and other equipment. The J1708 interface is also circular and designed with 6 pins. According to the SAE J1708 standard, it is mainly used for medium and low-speed data transmission between vehicle electronic control units.

Cable Material: The internal cables use high-quality copper core wires to ensure good conductivity and signal transmission performance, effectively reducing signal attenuation and interference. There is usually an insulation and shielding layer on the outside, such as polyvinyl chloride (PVC), polyurethane (TPU) and other insulation materials, as well as shielding materials such as metal woven mesh or aluminum foil, which can prevent external electromagnetic interference and ensure the stability and accuracy of signal transmission.

Working principle

This Y-shaped cable splitter can achieve communication connection and data transmission between devices with different interface standards. The DB15 interface serves as a common input or output terminal, capable of receiving or sending data signals. When connected to automotive diagnostic equipment or other related electronic devices, data enters the cable from the DB15 interface, and then is transmitted to the 9 pin J1939 interface and 6 pin J1708 interface through internal circuits and cables according to device requirements and communication protocols, achieving data interaction with devices that support J1939 and J1708 protocols.