Garmin GTM 20 User Manual

GTM™ 20 OWNER’S MANUAL

The Garmin® GTM™ 20 FM TMC Traffic Receiver
receives Traffic Message Channel (TMC) information
broadcast over the FM radio data system. When a traffic
message is received, your Garmin GPS device displays
the incident on the map and can change your route to
avoid the traffic incident. For coverage areas, refer to the
Garmin Web site at http://www.garmin.com/fmtraffi

NOTE: The FM traffic receiver and GPS

device must be in data range of an FM station
transmitting TMC data to receive traffic
information.

NOTE: Garmin is not responsible for the

accuracy of the traffic information. The FM
traffic receiver simply receives signals from
the traffic service provider and shows that
information on your Garmin GPS device.

c.

Connecting Your GTM 20

1. Remove the power cable from your Garmin GPS.

2. Connect the cable on the GTM 20 to the power

3. Plug the other end into a 12-Volt receptacle.

4. Route the cable so that it does not interfere with

Testing the GTM 20

Service Information

The GTM 20 includes a 15-month subscription to Clear
Channel Total Traffic Network. The subscription activates
automatically after your Garmin GPS device acquires
satellite signals while receiving traffic signals from the
pay service provider. When the subscription expires,
purchase a renewal subscription; see the back of this sheet.

The GTM 20 can also use any free traffic services
available in your current area.

You can add other FM TMC subscriptions at any time.
Check the Garmin Web site at http://www.garmin.com/
fmtraffic for other available services.

NOTE: You do not need to activate the

subscription that came with your GTM 20.
The subscription activates automatically when
the Garmin GPS acquires satellite signals
while receiving traffic signals from the service
provider.

Observe the LED on the GTM 20: When the GTM 20
is connected to power, the Power LED is on. The GTM
20 may take up to five minutes to acquire data. The Status
LED indicates the status of the GTM 20:

which country you are currently in.

Check the Map: Check the map on the GPS device
for traffic incidents. Refer to the GPS device’s owner’s
manual.

Verify Signal Strength:

radio signals cannot be received, you may need to take the
vehicle outside.

Verify that you are in a service area:

from the pay service or free services.

connector on your Garmin GPS.

To 12-Volt receptacle

in vehicle

Power

Status

LED

LED

vehicle operating controls.

Yellow dot-dash flashes: determining

Yellow solid light: searching for signal.
Red solid light: momentary sync loss.
Green solid light: normal traffic data.

To power connector

on Garmin GPS

If you are inside a garage where

Check for service

Using Traffic Data with Your
Garmin GPS Device

The GTM 20 works with your Garmin GPS device to
show traffic flow and incident information and enable
routing around traffic incidents. Although each GPS
device operates differently, they all provide similar traffic
information.

Changing the Traffic Settings

Some Garmin GPS devices allow you to change the
Traffic Settings. The settings are often found near other
software settings. For example, from the Menu page,
touch Settings > Traffic.

NOTE: Not all Garmin GPS devices allow you

to change the Traffic settings.

Avoiding Traffic

The Map page shows a when there is a traffic incident
on your current route or on the road you are traveling
on. Touch the
traffic incident to review it. Touch Avoid
the incident.

to view the traffic information. Touch a

to route around

Viewing Traffic Information

Each GPS device provides a list of traffic incidents. On
many GPS devices, you can access this list by touching
the traffic icon on the Menu page. Touch an item in the list
to view the details.

Severity Color Code

In the traffic incidents list, the bars to the left of the traffic
symbols indicate the traffic incident’s severity:

Green = Low severity; traffic is flowing normally.

Yellow = Medium severity; traffic is a bit congested.

Red = High severity; traffic is heavily congested or

stopped.

Traffic Symbols

North American Meaning International

Road Condition

Road Construction

Congestion

Accident

Incident

Information

Purchasing an Additional FM
Subscription

To renew your FM subscription or purchase an additional
subscription, go to Garmin’s FM Traffic Web site at
http://www.garmin.com/fmtraffi
the Web site to obtain a 25-character Traffic Subscription
Code. Enter the code in your Garmin GPS device. Refer to
the confirmation e-mail or Web page for instructions about
entering the code.

The Traffic Subscription Code cannot be reused; you must
obtain a new code each time you renew your service. The
code is specific for the GTM 20 it was purchased for; it
cannot be used on multiple GTM 20 devices.

Register your GTM 20

Visit our Web site at http://www.garmin.com and click the

Product Registration

original sales receipt in a safe place. The 8-digit serial number is
located on the product packaging.

Serial Number: ___ ___ ___ ___ ___ ___ ___ ___

Garmin’s standard Limited Warranty applies to this accessory.
Refer to your GPS device’s owner’s manual or product
information sheet to view the warranty as well as warnings and
cautions, FCC compliance information, and the software license
agreement.

NOTE: You do not need to activate the

subscription that came with your GTM 20. Your
subscription activates automatically.

c. Follow the steps on

link to register your GTM 20. Keep your

March 2006 Part Number 190-00659-00 Rev. A Printed in Taiwan