What are the interface types of J1939 9 pin to open end cables?

What are the interface types of J1939 9 pin to open end cables?

The main interface type of J1939 9 pin to open end cable is the 9-pin Deutsch connector that complies with the SAE J1939 standard. The pin definitions are as follows:

Pin A: Connect the negative terminal of the battery (Battery -).

Pin B: Connect to the positive terminal of the battery (Battery+).

Pin C: It is a CAN-H signal line used for high-speed CAN data transmission.

Pin D: It is the CAN-L signal line, which together with CAN-H forms the CAN bus data transmission line.

Pin E: Usually connected to the CAN shield layer (CAN Shld) for anti-interference purposes.

Pin F: SAE J1708 (+), used to connect devices or circuits related to the J1708 protocol.

Pin G: SAE J1708 (-), works together with pin F to achieve data transmission of J1708 protocol.

Pin H: Used exclusively by original equipment manufacturers (OEMs) or for implementing other functions of the CAN-H bus.

Pin J: Used exclusively by original equipment manufacturers (OEMs) or for implementing other functions of the CAN-L bus.

Additionally, in terms of appearance color, there are two versions of 9-pin connectors available: black and green. Early commercial vehicles often used black versions, while new commercial vehicles such as trucks began to use green 9-pin plugs as diagnostic interfaces. The green connector is designed differently from the black one to achieve better compatibility and prevent device damage from accidental insertion.