Cummins 9 PIN J1939 (J1708) to OBD-II Adapter Cable

This guide is applicable to the following device / devices:

Mini

TMU CM4

CAN-FD Pro

CAN-FD Pro +IP67 casing

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Introduction

Do you need to connect your AutoPi device to a Cummins heavy-duty vehicle for J1939 or J1708 diagnostics and data logging?

The Cummins 9 PIN J1939 (J1708) to 16 PIN OBD-II Adapter Cable fits many Cummins-powered heavy-duty vehicles — including trucks, buses, and industrial machinery — and lets you easily connect your AutoPi device to start reading J1939 or J1708 data. Simply locate the 9-pin diagnostic port in your vehicle, typically found in the cabin, and plug in the cable.

The cable features a plug-and-play design for quick and secure connections, and is constructed with premium materials built for heavy-duty environments.

info

This adapter cable can be purchased through the AutoPi shop: Cummins 9 PIN J1939 (J1708) to 16 PIN OBD-II Adapter Cable.

Specifications

Property	Details
Compatibility	Cummins engines with a 9 PIN diagnostic port
Connector Types	9 PIN (male) to 16 PIN OBD-II (female)
Protocol Support	J1939 and J1708 for vehicle diagnostics
Durability	Premium materials for heavy-duty use
Ease of Use	Plug-and-play design

Pinout

AutoPi Function	Cummins 9 PIN	OBD-II 16 PIN
CAN High	Pin C	Pin 6
CAN Low	Pin D	Pin 14
Power	Pin B	Pin 16
GND	Pin A	Pin 5

note

The pinout above is based on the standard J1939/J1708 to OBD-II mapping. Refer to your Cummins engine documentation for any model-specific variations.