Acura RL (1996-2004 year). Manual — part 300
Car Status
This screen is used to confirm that navigation unit is
properly receiving input signals. Signals equal to (0) are
OFF, and signals equal to (1) are ON.If the value on the
display does not match the actual vehicle status, then
check the wire carrying the signal.
• CHG and CHG(CAN) are not used for this model.
• VSP-Vehicle Speed Pulse from PCM
(Pin 6 of C-connector)
a) OFF (0) when vehicle is not moving
b) ON (1) when vehicle is moving
The VSP comes from the PCM as a dedicated signal.
Internally, the navigation unit compares the actual VP on
the map against street data to adjust the pulse to speed
scaling factor. As this scaling factor becomes more
accurate, the "Level" gradually increases from 0 to 10
(see the Tire Calibrate diagnostic screen).
• BACK-Reverse indication from reverse relay
(Pin 5 of C-connector)
a) OFF (0) when shift lever is in any position other
than reverse
b) ON (1) when shift lever is in reverse
The Back signal is used by the navigation unit to allow
the map screen to show the VP moving backwards when
in reverse. This signal is needed because the Speed
Pulse has no direction indication.
• ILL-lllumination 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 on
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.
• PC Card Lid-Senses if PC Card 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 slid shut, then
replace the navigation unit. This slot is for insertion of
PC Flash memory cards for gathering diagnostic infor-
mation. This is for factory use only.
Main Menu
Table of Contents
Navigation System
System Diagnosis Mode (cont'd)
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 dia-
gram (90 degrees elevation) is directly overhead.
Naturally, nearby obstructions, like tall buildings will
block satellites in that direction. That is why it is neces-
sary to be in an open area to effectively troubleshoot
GPS reception issues.
The satellite numbers shown on the diagram corre-
spond to the "PRN" number in the "GPS Details"
screen. There are always 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.
NOTE: To use this screen for troubleshooting, the vehi-
cle should be out side away from buildings, tall trees,
and high-tension wires for at least 10 minutes with the
engine running. Also, make sure the rear shelf is free of
loose items that can block reception and that the trunk
lid is closed.
• The "Number of Satellites" box shows the number of
acquired satellites (maximum of 12). It should contain
3 or more icons. If not troubleshoot for "GPS icon is
white" (see page
).
• The "Current Position" shows latitude, longitude, and
elevation (in meters). If there are less than 3 satel-
lites, the elevation can be grossly inaccurate.
• The Date/Time field shows the current date, and also
a time that includes daylight savings and other off-
sets entered by the customer in Setup screen 2
"Adjust Time Zone/Clock".
GPS Detail
By pressing and holding the MENU button for 10 sec-
onds, a GPS Detail screen is displayed. This screen dis-
plays 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 2 "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 below is an example only.
The table of values shown on the screen below has the
following columns:
If "3D" is missing, fol-
low troubleshooting
(see page
).
If all 0, then, follow
troubleshooting (see
page
).
Main Menu
Table of Contents
Yaw Rate
This diagnostic checks the yaw rate sensor in the control
unit. This device detects when the vehicle turns, and
repositions the vehicle posion icon on the map screen.
For more detailed information, see the yaw rate sensor
theory of operation under "System Description"
• "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 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.
• 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.
• Auto tuning should always be on. If it is off, turn it
on.
• "Sensitivity study" represents the status of the inter-
nal tuning function. At initialization, this status of the
internal tuning function. At initialization, this value
starts at 6 and increases to # 10 as the internal correc-
tion values become more accurate.
• The settings "CCW Cal Factor", "CW Cal Factor", and
"Set" are for factory use only. THIS SHOULD NEVER
BE USED.
Main Menu
Table of Contents
Navigation System
System Diagnosis Mode (cont'd)
Tire Calibrate
As the vehicle moves, the navigation system receives
speed pulses from the PCM. These pulses are converted
using a conversion factor to a mph speed that moves
the vehicle position (VP) on the map. The navigation
system has an internal tuning function that generates
and refines this factor based on actual driving. The
"Level" indicates the status of the tuning. At initializa-
tion, it begins at 0, and increases to 10 as the navigation
system is used.
• The "Auto Tuning" is factory set to "ON", and should
remain on.
• The "LEVEL" indicates the tuning status. If it is less
than 10, the unit is still calibrating.
• The "Tire-Cal. Tuning" and the "Set" button should
not be used. It is for factory use only.
Functional Setup
Touch the item you want to check.
Main Menu
Table of Contents
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