GPS Detail By pressing and holding the MENU button for 10 seconds, a GPS Detail screen is displayed. This screen displays real time incoming satellite positional data. Most of the information shown on this screen is for factory use, however some of the data can indicate partial GPS signal interference.

- The box TS/AS and HDop/VDop is for factory use.
- The Speed and Direction information is updated in real time when driving, and can be used to detect intermittent speed sensor problems.
- The Date/Time Information is the same as in Setup screen ‘‘Adjust Time Zone/Clock''.
- If the ‘‘3D'' icon is shown above the yellow dots, this implies that at least 4 satellites are available for map positioning, and the ‘‘GPS'' indicator on the map screen will be green. See the ‘‘Global Positioning System'' detailed explanation in the ‘‘System Description''.
- If the row of data in the table below begins with a ‘‘yellow dot'', the AZI and EL fields can be used to locate each satellite on the circular GPS diagram (see prior screen).

NOTE: The data shown in the GPS Detail screen is an example only.
The table of values shown on the screen below has the following columns:

Column | Description | Problem indication
--- | --- | ---
Active | Active satellites (Yellow Dot) | If ‘‘3D'' is missing, follow GPS icon is white or not shown troubleshooting.
PRN | The satellite ID number |
ST | The status: 0=cannot view or searching, 2=acquiring | If all 0, then, follow GPS icon is white or not shown troubleshooting.
AZI | Azimuth, the angle (0−360) clockwise from north |
EL | Elevation from the horizon (90 deg is overhead) |
C/N | N/A | Healthy signal is 49-52, no signal: 27-33
ACC | N/A |