Garmin 225B, 225A Check Mic key input, It can be enabled, Or disabled via a Remote mounted

Problem

Possible Cause

Action

GTR 225 does not power on	No power to the	Check power connections,
	GTR 225	breakers, and main
		avionics switch
	Faulty electrical	Contact your dealer to
	wiring or connection	perform electrical system
		test
GTR 225 does not transmit	No power to Com	Check power connections
	Mic key connection	Check Mic key input
		connection
Intercom doesn’t function	It can be enabled	Check connections
	or disabled via a
	remote mounted
	switch or via the
	menu.
	No voice activation,	Check ICS page, Intercom
	or if must talk too	On/Off, Adjust Intercom
	loud
Can’t change active frequency	Com Radio not	If in Lock Out mode,
	communicating. The	press the external Com
	radio may also be in	FLIP/FLOP key for two
	lockout mode. In this	seconds to return to
	case the radio would	normal operation or cycle
	be tuned to 121.50	the avionics power. If the
	and the active freq	condition persists, contact
	would not be able to	dealer.
	be changed.
Display shows	Corrupted system	Contact factory
“Com Radio Needs Service” at	calibration
start-up	parameters

Table 4-1 Troubleshooting

4-2 Garmin GTR 225/225A/225B Pilot’s Guide 190-01182-00 Rev. A