SAE J1939 9-Pin Circular Diagnostic Connector | 1939P & 1939S Male Female OEM
The SAE J1939 1939P / 1939S are 9-pin circular diagnostic connectors conforming to the SAE J1939 standard for heavy-duty vehicle CAN bus diagnostic interfaces. The J1939 connector is the universal diagnostic port for commercial trucks, buses, agricultural equipment, and construction machinery. Available in Male Type A, B, C and Female variants, bare or with 15cm pre-wired leads, plus the HDC16-9 circular housing shell.
| Attribute | Detail |
|---|---|
| Standard | SAE J1939 (heavy-duty vehicle CAN bus diagnostic) |
| Part Numbers | 1939P (plug/male) / 1939S (socket/female) |
| Pin Count | 9-Pin circular |
| Male Types | Type A / Type B / Type C (different keying configurations) |
| Sealing Rating | IP67 (1m water immersion) |
| Wire Option | Bare connector / 15cm pre-wired leads |
| Applications | Commercial truck, bus, agricultural, construction machinery diagnostic |
SAE J1939 is the industry standard for CAN bus communication and diagnostics in heavy-duty vehicles. The 9-pin circular J1939 connector is the universal diagnostic port found on virtually all commercial trucks (Cummins, Detroit Diesel, Volvo, Kenworth, Peterbilt, Freightliner), buses, agricultural equipment (John Deere, Case IH, AGCO), and construction machinery (Caterpillar, Komatsu, Volvo CE). The J1939 CAN bus carries engine, transmission, ABS, and body system data for diagnostic tools such as Cummins INSITE, Detroit Diesel DiagnosticLink, and Volvo VCADS.
| Pin | Function |
|---|---|
| A | Ground (battery negative) |
| B | Ground (chassis) |
| C | CAN High (J1939) |
| D | CAN Low (J1939) |
| E | Shield |
| F | CAN High (J1939-2, optional) |
| G | CAN Low (J1939-2, optional) |
| H | Battery positive (+12V/+24V) |
| J | Battery positive (+12V/+24V) |
Q: What vehicles use the SAE J1939 9-pin connector?
A: The J1939 9-pin connector is standard on virtually all commercial trucks, buses, agricultural equipment, and construction machinery manufactured after 2001 in North America and Europe.
Q: What diagnostic tools use the J1939 connector?
A: Cummins INSITE, Detroit Diesel DiagnosticLink, Volvo VCADS, Allison DOC, and most heavy-duty truck diagnostic tools connect via the J1939 9-pin port.
Q: Is this IP67 rated?
A: Yes. The J1939 circular connector is rated IP67 when properly assembled.
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9 Pin Connectors
