Acura RL. Manual - part 658

a. OFF (0) if illumination cancel is not selected

b. ON (1) if illumination cancel is activated

The illumination cancel function is activated by increasing the dash brightness to "MAX" using the "+"
button. The CAN bus passes this information from the gauge control module to the navigation control unit.



ILL-Illumination Indication

(Pin 5 of navigation unit A-connector)

a. OFF (0) when parking lights, or headlights are off

b. ON (1) when parking lights, or headlights are off

This signal is used by the navigation unit to determine whether to put the navigation screen into the Day or
Night brightness mode (Setup screen 1).



DVD Lid-senses if DVD door is open

a. (Close) when door is closed

b. (Open) when door is open

The navigation unit has a micro switch to detect this. If open is indicated when the door is closed, replace
the navigation unit.

F-CAN SYSTEM LINK

F-CAN (Fast Controller Area Network) passes information between processors on the network. For
example, the F-CAN network is used to pass charging system signals between the PCM and the navigation
unit for the trip computer cooling fan function. The F-CAN network uses a communication protocol that
transmits data at 500 Kbps.



If the diagnostic screen below reads NG with the ignition switch ON (II), then you can use the HDS
(Honda Diagnostic System) to retrieve the diagnostic trouble codes (DTC) from the F-CAN. The data
displayed in the ID boxes is irrelevant.



For more details on troubleshooting the F-CAN, refer to MULTIPLEX INTEGRATED
CONTROL SYSTEM article.

NOTE:

This setting is unaffected by the "display mode" hard button located below
and to the left of the interface dial.

2007 Acura RL

2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL

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Page 91

Fig. 71: Screen Display - F-CAN System Link
Courtesy of AMERICAN HONDA MOTOR CO., INC.

COVERAGE AREA

This screen allows the dealer to select the area that applies to their location. The choice is US (continental)
or Hawaii. The default is "US." Select the choice (the system may reboot), exit the diagnostic mode, and
restart the vehicle.

Fig. 72: Screen Display - Coverage Area
Courtesy of AMERICAN HONDA MOTOR CO., INC.

GPS INFORMATION

This screen shows the current status of GPS reception. The circular diagram shows the current location of
the GPS satellites (yellow numbers) as they would appear in the sky. The outer circle represents the horizon
(0 degrees elevation). The middle and inner circles represents 30 and 60 degrees respectively. The very
center of the diagram (90 degrees elevation) is directly overhead. Nearby obstructions, like tall buildings,
will block satellites in that direction. That is why it is necessary to be in an open area to effectively
troubleshoot GPS reception issues. The satellite numbers shown on the diagram correspond to the "PRN"
number in the "GPS Details" screen. There are always at least 24 "active" GPS satellites in orbit. Because
satellites fail, and have to be removed from service, spares are always parked in orbit, ready to be activated.
This is why the PRN (satellite ID number) can be greater than 24.



The "Number of Satellites" box shows the number of acquired satellites (maximum of 12). It should
contain four or more icons. If not troubleshoot for "GPS icon is white or not shown" (see GPS ICON
IS WHITE OR NOT SHOWN ).



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



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

NOTE:

This function is designed to operate only when the vehicle is physically
located in the coverage area you select.

NOTE:

To use this screen for troubleshooting, the vehicle should be out side away
from buildings, tall trees, and high-tension wires for at least 10 minutes with
the engine running.

2007 Acura RL

2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL

Friday, June 05, 2009 3:28:16 PM

Page 92

Fig. 73: Screen Display - GPS Information
Courtesy of AMERICAN HONDA MOTOR CO., INC.

GPS DETAIL

By pressing and holding the MENU button for 10 seconds, a GPS Detail screen appears. This screen
displays real time incoming satellite positional data when the vehicle is outside in the open. The information
shown on this screen is for factory use.

Fig. 74: Screen Display - GPS Detail
Courtesy of AMERICAN HONDA MOTOR CO., INC.



The box TS/AS and H Dop/V Dop is for factory use.



The Speed and Direction information is updated in real time when driving.



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



If the "3D" icon is shown above the yellow dots, this implies that at least four 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, refer to Fig. 73).

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

COLUMN DESCRIPTION

NOTE:

Pressing the "map guide" button displays the satellite number on each
circle.

NOTE:

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

Column

Description

Problem indication

Active

Active satellites (Yellow
Dot)

If "3D" or "2D" is missing when the vehicle is parked outside,
follow GPS icon is white or not shown troubleshooting (see

2007 Acura RL

2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL

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Page 93

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 YAW RATE-LATERAL ACCELERATION
SENSOR ).



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



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



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

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



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.



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.

NAVIGATION UNIT SPECIFICATIONS

GPS ICON IS WHITE OR NOT SHOWN ).

PRN

The satellite ID number

The status: 0 = cannot
view or searching, 2 =
acquiring

If all 0, then, follow GPS icon is white or not shown
troubleshooting (see GPS ICON IS WHITE OR NOT
SHOWN ).

AZI

Azimuth, the angle (0-
360) clockwise from north

Elevation from the
horizon (90 deg is
overhead)

C/N

N/A

Healthy signal is 49-52, no signal: 27-33

ACC

N/A

? 1/2 or

2/2 ?

Shows view of all
satellites in two screen
views 1/2 or 2/2

Example: Car stopped
Normal

Abnormal

Offset

2.526 V

Offset

2.526 V

Sensor

2.516-2.536 V

Sensor

2.623 V

Example: Car turning
Normal

Abnormal

2007 Acura RL

2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL

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