Acura RL. Manual - part 642

System Function Diagram 

This diagram shows the features of the navigation system starting at the center and working outward in 
layers. The navigation program starts at "Key ON", and then displays the globe screen. Once the disclaimer 
screen is acknowledged, the next shaded portions of the diagram become active. However, some functions 
of the INFO and SET UP buttons, and all functions of the AUDIO and A/C buttons can be accessed 
immediately after the globe screen (white). 

The items above the map screen show various ways to set a destination, such as "Go Home." Once you 
begin driving to your destination, you are provided with map/voice guidance, routing cautions (in unverified 
areas), and a directions list. While driving to your destination, use the voice control system as much as 
possible to interact with the navigation, audio, and climate control systems.

VP

Vehicle Position. When in map mode, this circular icon shows the vehicle position 
on the map. Touch this icon to show the latitude, longitude, and elevation of your 
current position.

VR

Voice Recognition. This allows voice control of many of the navigation functions. 
The hardware consists of the microphone, voice control switch (TALK/BACK 
buttons), and the front speakers. See the overview for more information.

VSP

Vehicle Speed Pulse. This pulse signal coming from the PCM (via the CSS) is used 
to update the vehicle position on the map. These pulses do not indicate direction 
(forward or backward). When in reverse, the navigation receives a signal and directs 
the VP to move backwards on the map.

WMA music 
file

Windows media audio file. This is an accepted format for music file to be played on 
either a CD or PC card.

XM

This device receives information from the XM satellites and passes XM audio 
information to the audio unit. In addition, traffic information is sent to the navigation 
unit.

Yaw Sensor

This device is located in the navigation system control unit and senses the side-to-
side twisting force generated when the vehicle turns. See Yaw Rate-Lateral 
Acceleration Sensor.

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL

  

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Fig. 13: Navigation System - Function Diagram 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Diagnostic System Diagram 

This diagram represents the diagnostic "slice" in the Navigation Functional diagram. The diagram shows an 
overview of the navigation diagnostic features starting at the center and working outward in layers. The 
diagram starts with "Key on". The diagram shows two ways to get to the diagnostic main menu: 



By starting the vehicle with the SCS connector plugged in, you will enter the diagnostic "System 
Links" screen, select "Return" to get to the main diagnostic menu.  



From any of the navigation Map or Menu screens, press and simultaneously hold the keys Menu + 
Map + Cancel. The diagram shows the available diagnostic menu choices, starting at the bottom left, 
and moving clockwise. In most cases, do not clear or change settings in any diagnostic screen unless 
instructed to do so in the explanation, or by the factory. 

 

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2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL

  

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If the factory asks you to insert a PCMCIA memory card into the PC Slot, insert the PC, card and the menu 
options referring to the PC card become available. 

Fig. 14: Navigation Functional Diagram 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

NAVIGATION UNIT INPUTS AND OUTPUTS 

Fig. 15: Identifying Navigation Unit Connector A (20P) 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

NAVIGATION UNIT CONNECTOR REFERENCE 

 

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2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL

  

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Terminal 

Number

Wire 

Color

Terminal 

Name

Description

Voltage (about)

Symptom

1

WHT

RSIG (Red 
signal)

Red color signal

0.2 VAC Average

If open: Red color missing 
(see "RGB COLOR" 
diagnostic). 
If short to ground: Red 
color missing (see "RGB 
COLOR" diagnostic).

2

RED

GSIG (Green 
signal)

Green color signal

0.2 VAC Average 
in RGB diagnostic 
mode

If open: Green color 
missing (see "RGB 
COLOR" diagnostic). 
If short to ground: Green 
color missing (see "RGB 
COLOR" diagnostic).

3

GRY

(1)

SHSIG (Shield 
signal)

Shield for No. 1, 
2, 11, 12, 13 
terminals

0 V

If open: No change to 
display. 
If short to ground: No 
change to display.

4

ORN

A/C-SI (Air 
conditioner 
serial in)

Communication 
signal for climate 
control unit

-

-

5

GRY

ILL (+) 
(Illumination 
positive)

Parking light on 
signal

Lights on: battery 
voltage, Lights off: 
0 V

If open: When brightness = 
"Auto," night mode for the 
display is inoperative when 
lights on. 
If short to ground: Blows 
No. 4 (10A) fuse in under-
hood fuse/relay box.

8

WHT

CAN-H (CAN 
high)

F-CAN bus 
communication

Pulses 2.5-6 V 
average 2.5 V 
(depends on F-CAN 
communication 
traffic)

If open: 

1. System Links FI-

ECU, and Meter both 
show "NG."  

2. F-CAN diagnostic = 

"NG."  

3. B-CAN diagnostic = 

"NG."  

4. Car status CHG 

(CAN) = 0.  

5. Functional Setup, 

Trip info, FUP & 
Sampled FL = 0.  

 
If short to ground: Same 
diagnostic conditions as 
when open, and also sets 
the following DTCs. 

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL

  

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