Acura TSX / Honda Accord CL. Manual — part 178

contain 3 or more icons. If not troubleshoot for "GPS icon is white" (seeGPS ICON IS WHITE ).

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The "Current Position" shows latitude, longitude, and elevation (in meters). If there are less than 3
satellites, the elevation can be grossly inaccurate.

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The Date/Time field shows the current date, and also a time that includes daylight savings and other
offsets entered by the customer in Setup screen 2 "Adjust Time Zone/Clock".

Fig. 77: GPS Information Display

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.

2004 Acura TSX

2004 ACCESSORIES & EQUIPMENT Navigation System - TSX

Fig. 78: GPS Detail Display

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The box TS/AS and HDop/VDop is for factory use.

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The Speed and Direction information is updated in real time when driving, and can be used to detect
intermittent speed sensor problems.

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The Date/Time Information is the same as in Setup screen 2 "Adjust Time Zone/Clock".

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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" (see SYSTEM DESCRIPTION ).

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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).

The table of values shown on the screen below has the following columns:

NOTE:

The data shown in the "GPS Detail" screen is an example only.

2004 Acura TSX

2004 ACCESSORIES & EQUIPMENT Navigation System - TSX

Fig. 79: GPS Detail Table

Yaw Rate

This diagnostic checks the yaw rate sensor in the control unit. This device detects when the vehicle turns, and
repositions the vehicle position icon on the map screen. For more detailed information, see the yaw rate sensor
theory of operation under "System Description" (see SYSTEM DESCRIPTION )

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"Sensor" indicates the voltage output from the yaw rate sensor. It should indicate about 2.500 bolts when
stopped.

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"Offset" is the reference voltage or standard within the yaw rate sensor. It also should indicate about
2.500 volts when stopped.

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A "sensor" output voltage HIGHER than the "Offset" voltage indicates that the vehicle is turning to the
right. A "sensor" output voltage LOWER than the "Offset" voltage indicates that the vehicle is turning to
the left.

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The yaw rate offset, and sensor should both indicate about 2.500 volts when stopped. If either reads zero,
or 5.000 volts, replace the navigation unit.

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The yaw rate offset and sensor should be within +/- 0.01 V of each other when stopped. The sensor value
should change relative to the offset as the car is turned while driving. If not, replace the navigation unit.

2004 Acura TSX

2004 ACCESSORIES & EQUIPMENT Navigation System - TSX

Fig. 80: Yaw Rate Display (Example: Car Stopped)

Fig. 81: Yaw Rate Display (Example: Car Turning)

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Auto tuning should always be on. If it is off, turn it on.

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"Sensitivity study" represents the status of the internal tuning function. At initialization, this value starts
at 6 and increases to # 10 as the internal correction values become more accurate.

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The settings "CCW Cal Factor", "CW Cal Factor", and "Set" are for factory use only. THIS SHOULD
NEVER BE USED.

2004 Acura TSX

2004 ACCESSORIES & EQUIPMENT Navigation System - TSX