J1939 Engine Network Connection Considerations

NOTICE

You must use a Garmin® GPSMAP® J1939 accessory cable when connecting the chartplotter to the J1939 engine network to prevent corrosion due to moisture. Using a different cable voids your warranty.

NOTICE

If you have an existing engine network on your boat, it should already be connected to power. Do not add any additional power supply.

This chartplotter can connect to an engine network on your boat to read data from compatible devices such as certain engines. The engine network follows a standard and uses proprietary messages.

You should consult the manufacturer of your engine or engine network when connecting the chartplotter. Some manufacturers may have requirements you must follow when connecting to avoid unexpected behavior.

The port labeled J1939 is used to connect the device to the existing engine network. You must route the cable within 6 m (20 ft.) of the engine network backbone.

The Garmin GPSMAP J1939 accessory cable requires connection to a power source and proper termination. For more information on connecting to your engine network, see the manufacturer's engine documentation.


Cable pinout with callouts

Pin

Wire Color

Description

Callout number 1

Bare

Shield

Callout number 2

Red

Power, positive

Callout number 3

Black

Power, negative

Callout number 4

White

CAN High

Callout number 5

Blue

CAN Low

GUID-BF2FF273-008A-482A-A96F-362ADA8996BA v6
February 2024