Table 4-9. Htaws Alert Troubleshooting Guide - Garmin GTN 6 series Maintenance Manual

4.3.1.7 HTAWS Related Alerts
Alert Text
CONFIGURATION – Terrain/
HTAWS configuration is
invalid. GTN needs service.
REMOTE KEY STUCK - RP
Mode key is stuck.
REMOTE KEY STUCK -
HTAWS inhibit key is stuck.
TAWS AUDIO INHIBITED -
The TAWS Audio Inhibit
discrete has been active for at
least 30 seconds.
HTAWS - Invalid Terrain
Database
190-01007-B1
Rev. 1

Table 4-9. HTAWS Alert Troubleshooting Guide

Possible Cause
The HTAWS configuration is invalid due to a
loss or corrupted registry.
The RP Mode key/switch is stuck in the
enabled or pressed state.
The HTAWS inhibit input is stuck in the
enabled or pressed state.
There is a wiring problem or a problem with
the remote LRU(s) that are connected to the
GTN audio inhibit input.
The terrain database on the SD Card is not of
sufficient resolution for HTAWS.
Corrective Action
The HTAWS/terrain configuration setting must be reselected. Reselect the
HTAWS or terrain selection and cycle power to the GTN.
If the problem persists, contact Garmin Product Support.
Press the HTAWS Inhibit key to cycle its operation.
Go to the GTN DIAGNOSTICS - DISCRETE INPUTS page in configuration
mode and check that the state of the input changes when the HTAWS Inhibit
switch is pressed and released.
Verify wiring to the switch.
If the problem persists, contact Garmin Product Support.
Press the HTAWS Inhibit key to cycle its operation.
Go to the GTN DIAGNOSTICS - DISCRETE INPUTS page in configuration
mode and check that the state of the input changes when the HTAWS Inhibit
switch is pressed and released.
Verify wiring to the switch.
If the problem persists, contact Garmin Product Support.
Verify wiring to the TAWS AUDIO INHIBIT input.
Go to the GTN DIAGNOSTICS - DISCRETE INPUTS page in configuration
mode and check the state of the discrete input.
If the problem persists, contact Garmin Product Support.
Go to www.flyGarmin.com and retrieve the appropriate 3 arc-second terrain
database. Load database to the unit and verify that the system message has
disappeared.
If the system message persists, contact Garmin Product Support.
GTN 6XX/7XX Part 27 AML STC Maintenance Manual
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