Cummins-Komatsu Truck 12 PIN J1939 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 or Komatsu truck for J1939 diagnostics and data logging?

The Cummins-Komatsu Truck 12 PIN J1939 to 16 PIN OBD-II Adapter Cable fits many Cummins and Komatsu truck models — including heavy-duty trucks and commercial vehicles — and lets you easily connect your AutoPi device to start reading J1939 data. Simply locate the 12-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-Komatsu Truck 12 PIN J1939 to 16 PIN OBD-II Adapter Cable.

Specifications

Property	Details
Compatibility	Cummins and Komatsu trucks with 12 PIN diagnostic port
Connector Types	12 PIN (male) to 16 PIN OBD-II (female)
Protocol Support	J1939 for vehicle diagnostics
Durability	Premium materials for heavy-duty use
Ease of Use	Plug-and-play design

Pinout

AutoPi Function	Cummins-Komatsu 12 PIN	OBD-II 16 PIN
CAN High	Pin 3	Pin 6
CAN Low	Pin 10	Pin 14
Power	Pin 1	Pin 16
GND	Pin 12	Pin 5

note

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