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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.
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.
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.
Why are the GPS signal levels very low on my Garmin 400W?
If the GPS signal levels are very low on your Garmin GPS, it could be due to improper antenna installation or coax routing. Check the GPS antenna installation, connections, and cable routing, ensuring the antenna is mounted on top of the aircraft. Also, make sure the aircraft is clear of hangars, buildings, trees, etc. RF interference at 1575.42 MHz from VHF COM can also cause this. Move the GPS antenna further from the COM antenna, add a 1575.42 MHz notch filter in COM coax, fix or replace the COM, or disconnect the ELT antenna coax to check for possible re-radiation.
What to do if my Garmin 400W GPS 400W Series unit does not compute a position?
If the Garmin GPS 400W Series unit does not compute a position, check the GPS antenna connections and ensure the aircraft is clear of obstructions like hangars, buildings, and trees. Also, allow the unit 20 minutes to complete its cycle.
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.
Why is my Garmin GPS not computing a position?
Your Garmin GPS may not be computing a position because it is not receiving signals. Check the GPS antenna connections and ensure the aircraft is clear of obstructions like hangars, buildings, and trees. Alternatively, the unit may need up to 20 minutes to complete its cycle.
How to troubleshoot a Garmin 400W 400W Series unit that does not power on?
If the 400W Series Garmin GPS unit does not power on, ensure power is connected to the main 78-pin connector P4001, pins 19 and 20, and ground to P4001, pins 77 and 78. Check the circuit breakers and main avionics switch.
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.
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.
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 |
