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What to do if there is an aviation database integrity error on my Garmin 400W GPS?
If the aviation database has an integrity error, the data may not be usable. Try reloading the information onto the card. If the problem persists, replace the card.
What to do if my Garmin 400W signal levels drop when avionics are turned on?
If your Garmin GPS signal levels drop when you turn on your avionics, it might be due to noise interference. Try turning off all avionics, then turn them on one by one to find the source of the interference. Also, route the GPS cable and position the GPS antenna away from potential interference sources.
How to fix Garmin GPS signal levels that are very low?
Low Garmin GPS signal levels can be caused by a few things. First, check the GPS antenna installation, connections, and cable routing to ensure they are correct. The GPS antenna should be mounted on top of the aircraft. Second, make sure that the aircraft is clear of obstructions such as hangars, buildings, and trees. Finally, RF interference at 1575.42 MHz from VHF COM can be the cause. Try moving the GPS antenna further from the COM antenna or adding a 1575.42 MHz notch filter in the COM coax. You may also need to fix or replace the COM or disconnect the ELT antenna coax to check for possible re-radiation.
What to do if Garmin 400W GPS OBS Resolver won’t calibrate?
If your Garmin GPS OBS Resolver won’t calibrate, check the resolver specifications and wiring.
Why do the GPS signal levels drop when avionics are turned on in my Garmin GPS?
If the GPS signal levels drop when avionics are turned on, it may be due to noise interference from other avionics. Turn off all avionics, then turn them on one at a time to isolate the source of the interference. Also, route the GPS cable and locate the GPS antenna away from sources of interference.
What does 'check unit cooling' mean on my Garmin 400W GPS?
If the 400W Series Garmin GPS unit has detected excessive display backlighting temperature, check for adequate ventilation or check cooling airflow.
How to troubleshoot Garmin 400W RS-232 device not communicating?
If an RS-232 device isn't communicating with your Garmin 400W Series unit, check the RS-232 port setting for the port that the device is connected to. Verify the configuration of the other device. Ensure the Garmin unit's RX is connected to the remote device's TX and the Garmin unit's TX is connected to the remote device's RX. Verify that there is only one TX source per RX port. Also, check the wiring connections.
What does Garmin GPS Fan Fail Annunciation mean?
A Fan Fail Annunciation on your Garmin GPS indicates a problem with the cooling fan. Check the wiring and replace the fan if it has failed.
What to check if Garmin GPS is not responding – check GPS antenna?
If your Garmin GPS is not responding and prompts you to check the GPS antenna, verify that the center conductor is not shorted to the braid in the coaxial cable.
How to solve Garmin 400W GPS data transfer error?
If you see a data transfer error during unit-to-unit crossfill of user data (user waypoints and/or flight plans) on your Garmin GPS, re-attempt the data transfer.
General| Display Size | 4.3 inches |
|---|---|
| Display Resolution | 480 x 272 pixels |
| Preloaded Maps | Yes (City Navigator NT) |
| Waypoints/favorites/locations | 1000 |
| Lane assist | Yes |
| Voice prompts | Yes |
| Bluetooth | No |
| FM traffic compatible | Yes |
| Receiver | High-sensitivity GPS receiver |
