Structural characteristics of J1939 male 9PIN to J1939 female 9PIN and OBD2 female 16PIN splitter Y cable

Structural characteristics of J1939 male 9PIN to J1939 female 9PIN and OBD2 female 16PIN splitter Y cable

The J1939 male to J1939 female and OBD2 female splitter Y cable combines the characteristics of J1939 cable and OBD2 cable, and achieves signal distribution function through the Y-shaped structure of the splitter. The following are its structural features:

interface design

J1939 interface: J1939 typically uses a 9-pin connector. The male end has pins and the female end has sockets to ensure a stable connection and adapt to vibrations and bumps during car driving.

OBD2 interface: The OBD2 female head is a 16 pin trapezoidal interface that complies with unified standards and can be universally connected to various vehicle diagnostic equipment and vehicle OBD2 interfaces that comply with OBD2 standards.

Divider: Adopting a Y-shaped structure, it realizes the signal from one J1939 male head to two outputs, namely one J1939 female head and one OBD2 female head, meeting the communication needs of multiple devices.

Internal Wiring

J1939 line: It consists of multiple core wires, generally in the form of twisted pair, used to transmit signals specified in the J1939 protocol to ensure the accuracy and stability of data transmission. Twisted pair cables can reduce electromagnetic interference and have a good insulation layer to prevent core wire short circuits and external interference.

OBD2 line: There is a power line to supply power to the connected devices, a ground wire to ensure the circuit circuit and safety, and a CAN bus line or other communication line for data communication with the vehicle's electronic control unit (ECU), which can read fault codes, real-time data, etc.

Split circuit: Inside the splitter, there is a corresponding circuit design that distributes the signal input from the J1939 male head to the J1939 female head and OBD2 female head according to certain rules, ensuring the uniformity and stability of signal distribution while avoiding crosstalk between signals.

Shielding layer

To improve anti-interference ability, the cable is equipped with a shielding layer, which can effectively block the interference of external electromagnetic radiation on the internal signals of the cable, and also prevent internal signals from generating electromagnetic interference to the outside, ensuring stable transmission of signals in complex electromagnetic environments.

protective measures

There are usually dust-proof and waterproof sealing measures at the interface to prevent dust and water vapor from entering and causing poor contact or short circuit. The cable itself has flexibility and wear resistance, and can be flexibly arranged in complex wiring environments inside vehicles, and withstand long-term use and possible friction.