Deutsch J1939 9-Pin Diagnostic Connector – 1939S-P080 | Male Type A & B + Female IP67

The Deutsch 1939S-P080 is a 9-pin circular diagnostic connector conforming to the SAE J1939 standard for heavy-duty vehicle CAN bus diagnostic interfaces. The P080 suffix indicates the 80mm cable exit panel-mount variant, designed for installation in dashboard panels, junction boxes, or equipment enclosures. Available in Male Type A, Male Type B, and Female variants, bare or with 15cm pre-wired leads.

Key Specifications

• Part Number: 1939S-P080
• Standard: SAE J1939 (heavy-duty vehicle CAN bus diagnostic)
• Pin count: 9-pin circular
• Male types: Type A / Type B (different keying configurations)
• Sealing rating: IP67 (1m water immersion, 30 minutes)
• Available as: Bare connector or 15cm pre-wired leads
• Application: Commercial truck, bus, agricultural, construction machinery diagnostic port

J1939 9-Pin Connector Pin Assignment

• Pin A: Ground (battery negative)
• Pin B: Ground (chassis)
• Pin C: CAN High (J1939 primary)
• Pin D: CAN Low (J1939 primary)
• Pin E: Shield
• Pin F: CAN High (J1939-2, optional secondary bus)
• Pin G: CAN Low (J1939-2, optional secondary bus)
• Pin H: Battery positive (+12V / +24V)
• Pin J: Battery positive (redundant supply)

1939S-P080 vs. Standard J1939 Connectors: What Is the P080?

The P080 designation indicates a panel-mount design with 80mm cable exit. This differs from the standard J1939 connector (which is a free-hanging plug) in that the P080 includes a mounting flange for installation in a fixed panel position. This makes it the preferred choice for OEM diagnostic port installations where the port must be accessible from a fixed location on the vehicle or equipment. The Type A and Type B male variants use different keying configurations to prevent mis-mating with incompatible diagnostic tools or harness connectors.

Compatible Diagnostic Tools (J1939 9-Pin)

• Cummins INSITE — Cummins ISX, ISB, ISC, ISL engine diagnostics
• Detroit Diesel DiagnosticLink (DDDL) — DD13, DD15, DD16 engine diagnostics
• Volvo VCADS Pro / PTT — Volvo D11, D13, D16 engine diagnostics
• Allison DOC — Allison 1000/2000/3000/4000 series transmission diagnostics
• Caterpillar ET (Electronic Technician) — Cat C7, C9, C13, C15 engine diagnostics
• John Deere Service Advisor — PowerTech engine and tractor diagnostics
• WABCO Toolbox — ABS/EBS brake system diagnostics
• Bendix ACom — Air brake system diagnostics

Common Applications

• Commercial truck diagnostic port (panel-mount, Cummins/Detroit Diesel/Volvo/Paccar)
• Agricultural equipment J1939 diagnostic interface (John Deere, Case IH, New Holland, AGCO)
• Construction machinery diagnostic port (Caterpillar, Komatsu, Volvo CE, Liebherr)
• Bus and coach J1939 panel-mount diagnostic harness
• Marine diesel engine diagnostic port (Cummins Marine, Volvo Penta)

Frequently Asked Questions

Q: What is the difference between Type A and Type B male connectors?
A: Type A and Type B use different keying configurations to prevent mis-mating with incompatible diagnostic tools or harness connectors. Type A is the most common configuration for North American commercial trucks. Type B is used in some European and agricultural equipment applications. Select the type matching your vehicle's diagnostic port specification.

Q: What is the difference between J1939 and OBD-II?
A: OBD-II (16-pin trapezoidal connector) is the standard for passenger cars and light commercial vehicles. J1939 (9-pin circular connector) is the standard for heavy-duty commercial vehicles, agricultural equipment, and construction machinery. J1939 uses a higher-speed CAN bus (250 kbps or 500 kbps) and a different protocol stack than OBD-II. Heavy-duty trucks have both ports — the J1939 port for engine/transmission diagnostics and the OBD-II port for emissions compliance.

Q: Is this IP67 rated?
A: Yes. The 1939S-P080 is rated IP67 (1m water immersion for 30 minutes) when properly assembled with the correct cable seal and backshell.

Q: Can I use this connector for a J1939 data logger or telematics device?
A: Yes. J1939 data loggers, fleet telematics units, and ELD (Electronic Logging Device) adapters all connect via the J1939 9-pin port. The 1939S-P080 female variant is used for the vehicle-side port; the male variant is used for the device-side plug.