Acura RL. Manual - part 659



"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.



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



For detailed analysis of the yaw rate select "tuning."

Fig. 75: Screen Display - Yaw Rate
Courtesy of AMERICAN HONDA MOTOR CO., INC.

YAW RATE TUNING

This diagnostic allows you to graphically display problems with the yaw rate sensor.



The "ANG-Disp" value accumulates any differences between the "offset," and "sensor" voltages (see
Yaw Rate diagnostic, refer to YAW RATE) . When the sensor is working properly, the random
changes in these two voltages generally cancels out, so the value is 0. However if one voltage is
consistently higher than the other, then the "ANG-Disp" value accumulates the constant change.



The "Reset" button temporarily clears the angular accumulation (ANG-Disp), and clears the display
dots.



Do not touch the "CCW," "CW," or "Set" buttons. These are used for factory setup only.

Two tests are explained below. For gross problems with the sensor, the stationary test usually confirms
whether the sensor is defective. For yaw rate issues related to driving, perform the road test described below.

1. Stationary test: If the "VP" icon spins in place and the "ANG-Disp" value slowly increases or

decreases in value, the yaw rate sensor is defective. Replace the navigation control unit.

2. Road test: Drive the vehicle on a very straight road. Enter the diagnostic mode, select "Yaw rate," and

touch the "Tuning" button. While driving down a straight road, the white "dots" should trace a straight
line across the screen. However, if you are driving on a straight road, and you notice the dots
constantly dropping down or heading up as you drive, the navigation control unit's yaw sensor is
defective. You can touch "Reset" to clear "ANG-Disp," and dotted lines.

If either test above fails, please enter "Yaw rate sensor defective" for the problem description, on the
"Navigation core return form."

Offset

2.526 V

Offset

2.526 V

Sensor 2.678 V (left turn) 2.478 V (right turn)

Sensor 2.623 V (no change on turns)

2007 Acura RL

2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL

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

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Fig. 76: Screen Display - Yaw Rate Tuning
Courtesy of AMERICAN HONDA MOTOR CO., INC.

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 "Study" indicates the status of the tuning. At navigation initialization, 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 "Study" indicates the tuning status. If it is less than 10, the unit is still calibrating.



The "Tire-Cal. Tuning" and Set should not be used. It is for factory use only.

Fig. 77: Screen Display - Tire Calibrate
Courtesy of AMERICAN HONDA MOTOR CO., INC.

FUNCTIONAL SETUP

Select the item you want to check.

Fig. 78: Screen Display - Functional Setup

2007 Acura RL

2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL

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

Page 96

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Solar Angle

This screen graphically displays the sun's position as determined by the GPS. The navigation system uses
the sun's angle, along with the sunlight sensor to control the driver/passenger A/C air flow. The heat that the
A/C unit removes varies, depending on the angle of the sun entering the vehicle. This screen is for factory
use only, and should not be adjusted.



The screen shows a circular diagram of the sky oriented in the direction that the vehicle is pointing.
During daylight hours a red dot is shown, representing the direction and elevation of the sun. The
outer circle represents the horizon (0 degrees elevation). The middle circle is 30 degrees, the center
circle is 60 degrees, and the very center is directly overhead (90 degrees).



The "manual tuning" button should always be "OFF."

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The "Angle" is the angle that the sun (shown with red "dot") is above the horizon.



The "vehicle" value represents the angle, clockwise from North, to the direction that the vehicle
position (VP) icon is pointing (always points straight up).

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The "direction" value is the angle, measured clockwise from the VP (straight up) to the suns position.



The reliability ranges from 1 to 3, and represents the accuracy of the Vehicle Position relative to the
sun.

Fig. 79: Screen Display - Solar Angle
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Log Data

This screen allows the factory to select log data to troubleshoot navigation system issues.



Normally there is no card in the "PC Card Slot," and the PC slot door should always be closed. The
screen should appear as shown.

Fig. 80: Screen Display - Log Data

2007 Acura RL

2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL

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

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Courtesy of AMERICAN HONDA MOTOR CO., INC.



However, if the factory provides a PC card and instructs you to insert it into the card slot (label side
up). If instructed by the factory, select "Gyro. Sensor Logs ON." Follow the factory procedure for
gathering test data, and properly ending the test.

Fig. 81: Screen Display - Log Data
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Send GPS Time

This screen is for factory use only. It allows adjustment of the GPS time. This display updates in realtime.



"GPS Time" is the time as received from the GPS satellites. It is in Greenwich Mean Time (GMT).



Date, Hour, Minute, and "Set" should not be used.

Fig. 82: Screen Display - Send GPS Time
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Demo Mode ('06-07 models)

This screen is for factory use only, and should always be set to "OFF." Occasionally "DEMO" setting is
turned "ON" when vehicles are being used at Auto Shows or similar events. Turning this feature on, allows
the navigation system to automatically follow a route to destination when the vehicle is stationary. The
"Speed" can change the speed of the demo mode.

2007 Acura RL

2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL

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

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