compass reference guide...press compass display button (if available). set zone: 1. press and hold...

COMPASS REFERENCE GUIDE

Is there a display in

compass window?

Does the compass

display read “C”?

Is the incorrect direction

displayed?

Is the mirror receiving

+12V?

Press compass

display button (if

available).

SET ZONE:

1. Press and hold compass display /

power button (if available).

2. Release button when zone number

(1-15) is displayed.

3. Use zone map to verify your

location.

4. Use compass display / power

button to select correct zone.

5. Allow selected zone to clear from

display.

6. Press and hold compass display /

power button until “C” is displayed

ENSURE:

1. EC mirror harness power wire

is securely tapped into OEM

harness.

2. Ignition wire is receiving +12V.

3. Ground wire is securely

attached to vehicle ground.

Contact OEM dealership

for replacement harness.

Is the zone location set to

your location?

*OEM = Original Equipment Manufacturer (ex. Ford, GM, etc)

* This is intended as a tool for self-diagnosis. Gentex advises

contacting your local dealership for assistance.

YES

STILL NO

NO

NO

CALIBRATE:

Follow calibration

instructions listed.

YES

Compass functions to design

intent.

YES

YES

NO

NO

START

Make sure vehicle is

running or key is turned

to the “on” position

to ensure mirror is

receiving power.

NO

YES

How to Troubleshoot Your Compass Mirror 

Calibration instructions: 

1) If the compass display reads “C” the compass feature must be calibrated.a) To calibrate the compass, drive the vehicle in up to 3 complete circles at less than 5mph.

Setting the Correct Zone 

1. Press the power button (if available) for more than 9 seconds, or until the current Zone.2. Find your current location and variance Zone Number on the zone map on the pages below.3. Press the power button (if available) until the new desired Zone Number appears in the

display.4. Within a few seconds a compass direction will be displayed and the new zone is set.

Note: It is recommended to take your vehicle to your local dealership if your mirror does not have a power button.  Note: Installing items such as a ski rack, antenna, luggage rack, or recent body repair can cause changes to the vehicle’s magnetic field. This may require that the compass be recalibrated by performing the recalibration procedure 

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GNTX

NOAA/NCEIWorld Magnetic Model, Epoch 2020−2025Generated for 2025 at 0m AMSL© 2016, 2019 Gentex Corporation

USGSNational Atlas of the United States

World Boundary Data Bank II(For Reference Only)

Compass Zone Map

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Magnetic Zone Variation MapMap Data (for reference only): USGS,National Atlas of the United States,World Boundary Data Bank IIMagnetic Field Data: NOAA/NCEIWMM2020 (Data for 2025)© 2016, 2019 Gentex Corporation

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Magnetic Zone Variation MapMap Data (for reference only): USGS,National Atlas of the United States,World Boundary Data Bank IIMagnetic Field Data: NOAA/NCEIWMM2020 (Data for 2025)© 2016, 2019 Gentex Corporation

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Magnetic Zone Variation MapMap Data (for reference only): USGS,National Atlas of the United States,World Boundary Data Bank IIMagnetic Field Data: NOAA/NCEIWMM2020 (Data for 2025)© 2016, 2019 Gentex Corporation

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Magnetic Zone Variation MapMap Data (for reference only): USGS,National Atlas of the United States,World Boundary Data Bank IIMagnetic Field Data: NOAA/NCEIWMM2020 (Data for 2025)© 2016, 2019 Gentex Corporation

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Magnetic Zone Variation MapMap Data (for reference only): USGS,National Atlas of the United States,World Boundary Data Bank IIMagnetic Field Data: NOAA/NCEIWMM2020 (Data for 2025)© 2016, 2019 Gentex Corporation

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Magnetic Zone Variation MapMap Data (for reference only): USGS,National Atlas of the United States,World Boundary Data Bank IIMagnetic Field Data: NOAA/NCEIWMM2020 (Data for 2025)© 2016, 2019 Gentex Corporation