Garmin GPSMAP 431s Installation Instructions

Garmin GPS Installation Instructions - GPSMAP 431s.
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GPSMAP 400/500 Series Installation Instructions

Your GPSMAP 400/500 series chartplotter must be properly installed according to the following instructions. You need the appropriate 

fasteners, tools, and mounts listed in each section. If you experience difficulty installing the chartplotter, seek the assistance of a 

professional installer, or contact Garmin Product Support.
Before installing your GPSMAP 400 or 500 series chartplotter, confirm that the package contains the items listed on the box. If any parts are 

missing, contact your Garmin dealer immediately.

WARNING: See the Important Safety and Product Information guide in the product box for product warnings and other important 

information.

  WARNING: Always wear safety goggles, ear protection, and a dust mask when drilling, cutting, or sanding.

  NotIce: When drilling or cutting, always check the opposite side of the drilling or cutting surface.

To install and use your chartplotter:

1 Selectamountinglocation(page2).
2. Mountthechartplotter(page2).
3. Installthetransducer,ifapplicable(page3).
4. Installthewiringharness(page6).
5. ConnectthechartplottertoaNMEA2000network(optional,ifapplicable)(page8).
6. Connectthecablestothechartplotter(page9).
7. Testtheinstallation(page9).

Chartplotter Functionality Matrix

The chartplotters in the GPSMAP 400/500 series have different functionality based on model number. Use this matrix to determine the feature 

set and installation requirements of your chartplotter.

Chartplotter

NMEA 2000

NMEA 0183

Garmin CANet Sonar

GPSMAP 420/430/430x/440/440x/450

No

Yes

Yes

“s”versiononly

GPSMAP 520/525/530/535/540/545/550/555

No

Yes

Yes

“s”versiononly

GPSMAP 421/441/451

Yes

Yes

No

“s”versiononly

GPSMAP 431/531

No

Yes

No

“s”versiononly

GPSMAP 521/526/536/541/546/551/556

Yes

Yes

No

“s”versiononly

March2012

190-01074-02Rev.C

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