Garmin 178c map system. sonar stopped working. Chart plotter says sonar turned off. Sonar unit is getting power and blinking red.

SOURCE: Sonar Problem

Try a soft reset first, if that doesn't correct it try a hard reset. BE SURE and Save Data before th eHard Reset, it clears all waypoints and such.

Soft Reset Hard Reset

LCX 15mt Reset 1. Turn unit OFF 1. Turn unit OFF 2. Press and hold the PAGES key 2. Press and hold the ZIN&ZOUT Keys at the same time 3. Press and hold the PWR key 3. Press and hold the PWR key 4. Release both buttons when the USA map appears 4. Release both buttons when the USA map appears

SOURCE: garmin 178c turns off on it's own.

Hi

Sounds very much like the wiring plug connections in the back, always overlooked but so important that connections are tight and contacting.

SOURCE: I have a garmin gpsmap 440s that will only read

Sounds like the transducer is installed at the wrong angle or in such a way that it is getting a lot of air from something on the hull. If it is a transom mount, check that it is angled correctly and not too close to the motor or aft of some kind of thru-hull fitting that will cause turbulence.

SOURCE: GPS operation freeze up

Upgrading the system software of your GPSMAP 545s will most likely fix your freezing up problem.

I hope that helps.

Iron

• 3018 Answers
• Posted on Mar 18, 2011

SOURCE: I have a Garmin 182c

If you nicked it good enough yes it can. If the receiver doesn't detect the transducer, a digital message on the display will indicate this.