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 connect only one chartplotter to one engine network. Connecting more than one chartplotter to one engine network may result in 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 connector pinout with callouts

Pin

Wire Color

Description

Callout number one

Bare

Shield

Callout number two

Red

Power, positive

Callout number three

Black

Power, negative

Callout number four

White

CAN High

Callout number five

Blue

CAN Low

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