Acura RL. Manual - part 644

NAVIGATION UNIT INPUTS AND OUTPUTS 

source)

source

System will reboot to 
"enter code" screen. If 
short to ground: Blows 
fuse No. 7(10A) in the 
driver's under-dash 
fuse/relay box.

2

PUR

ACC 
(Accessory)

Power source for 
accessories

Battery voltage 
at ACC (I)

If open: Display picture 
goes out (display back 
light still on). 
If short to ground: Blows 
fuse No. 32 (10A) in the 
under-dash fuse/relay 
box.

4

BLK GND (Ground)

Ground for navigation 
unit

0 V

If open: No effect on 
system. 
If short to ground: No 
effect on system.

5

BRN

BACK LT 
(Back light or 
reverse signal)

Reverse signal of select 
lever from "Multiplex 
Integrated Control 
Unit" (A/T) or backup 
light switch (M/T)

In reverse, 
battery voltage: 
Otherwise 0 V

If open: Navigation never 
sees reverse. 
Diagnostic screen "Car 
Status," "Back" = 0. 
If short to ground: Blows 
fuse No. 21 (7.5A) in the 
driver's under-dash 
fuse/relay box.

6

BLU

VSP (Vehicle 
speed pulse)

Vehicle speed pulse 
signal from PCM

Pulses 0-5 V: 
2.5 V average 
(depends on 
Bus traffic)

If open: No vehicle speed 
pulses. 
Diagnostic screen "Car 
Status," VSP Navi = 0. 
If short to ground: No 
vehicle speed pulses. 
Diagnostic screen "Car 
Status," VSP Navi = 0.

7

GRN

DIAG P 
(Diagnostic 
positive)

Service check signal for 
navigation system

5-6 V

If open: No effect on 
system. 
If short to ground: System 
goes into diagnostic 
mode.

8

YEL

DIAG N 
(Diagnostic 
negative)

Ground for service 
check signal

0 V

If open: No effect on 
system. 
If short to ground: No 
effect on system.

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL

  

me 

 

Friday, June 05, 2009 3:28:15 PM

Page 35 

© 2005 Mitchell Repair Information Company, LLC. 

Fig. 18: Identifying Navigation Unit Connector E (2P) 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

NAVIGATION UNIT CONNECTOR REFERENCE 

NAVIGATION UNIT INPUTS AND OUTPUTS 

Fig. 19: Identifying Navigation Unit Connector F (5P) 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

With AcuraLink  

NAVIGATION UNIT CONNECTOR REFERENCE 

Terminal 

Number

Wire 

Color

Terminal 

Name

Description

Voltage 

(about)

Symptom

1

-

GPS

GPS signal

5V

If open: GPS icon on screen is 
white, system links screen ANT 
shows "NG." 
If short to body ground: Same as 
open.

2

-

GND GPS

Ground for GPS 
signal

0 V

If open: GPS icon on screen is 
white, system links screen ANT 
shows "NG." 
If short to body ground: No effect 
on system.

Terminal 

Number

Wire 

Color

Terminal Name

Description

Voltage 

(about)

Symptom

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL

  

me 

 

Friday, June 05, 2009 3:28:15 PM

Page 36 

© 2005 Mitchell Repair Information Company, LLC. 

Without AcuraLink  

NAVIGATION UNIT CONNECTOR REFERENCE 

NAVIGATION UNIT INPUTS AND OUTPUTS 

1

WHT

HFL COMM3 (HFL 
communication 3)

Communication 
signal for HFL

5 V DC

Solid red HFL icon in 
Navi System Link

2

RED

HFL COMM4 (HFL 
communication 4)

Communication 
signal for HFL

4.5 V DC

Solid red HFL icon in 
Navi System Link

3

GRN

HFL COMM1 (HFL 
communication 1)

Communication 
signal for HFL

5 V DC

HFL icon in Navi 
System Link changes 
between red and green

4

BLK

HFL COMM2 (HFL 
communication 2)

Communication 
signal for HFL

4.5 V DC

HFL icon in Navi 
System Link changes 
between red and green

5

GRY

(1)

SH HFL (Shield 
HFL)

Shield for No. 1, 2, 
3, 4 terminals

0 V

-

(1)

The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the 
insulating tube, typically black or dark gray, may not match the color of the wire listed on the 
schematic.

Terminal 

Number

Wire 

Color

Terminal Name

Description

Voltage 

(about)

Symptom

1

GRN

HFL COMM3 (HFL 
communication 3)

Communication 
signal for HFL

-

Solid red HFL icon in 
Navi System Link

2

BLK

HFL COMM4 (HFL 
communication 4)

Communication 
signal for HFL

-

Solid red HFL icon in 
Navi System Link

3

RED

HFL COMM1 (HFL 
communication 1)

Communication 
signal for HFL

-

HFL icon in Navi 
System Link changes 
between red and green

4

WHT

HFL COMM2 (HFL 
communication 2)

Communication 
signal for HFL

-

HFL icon in Navi 
System Link changes 
between red and green

5

GRY

(1)

SH HFL (Shield 
HFL)

Shield for No. 1, 2, 
3, 4 terminals

-

-

(1)

The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the 
insulating tube, typically black or dark gray, may not match the color of the wire listed on the 
schematic.

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL

  

me 

 

Friday, June 05, 2009 3:28:15 PM

Page 37 

© 2005 Mitchell Repair Information Company, LLC. 

Fig. 20: Identifying Navigation Unit Connector G (7P)
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

NAVIGATION UNIT CONNECTOR REFERENCE 

DISPLAY UNIT INPUTS AND OUTPUTS FOR 20P CONNECTOR 

Fig. 21: Identifying Display Unit 20P Connector 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

NAVIGATION UNIT CONNECTOR REFERENCE 

Terminal 

Number

Wire 

Color

Terminal 

Name

Description

Voltage 

(about)

Symptom

1

WHT VCC (RC)

Power source for 
rearview camera

8 V

If open: No rearview camera image 
in reverse. 
If short to ground: No rearview 
camera image in reverse.

2

BLK GND (RC)

Ground for 
rearview camera

0 V

If open: No rearview camera image 
in reverse.

4

RED

VIDEO 
GND (RC)

Ground for 
rearview camera 
video signal

0 V

If open: No rearview camera image 
in reverse.

5

YEL

VIDEO 
(RC)

Video signal for 
rearview camera

0.3 VAC

If open: No rearview camera image 
in reverse. 
If short to ground: When put into 
reverse, navigation screen goes 
black (display backlight still 
operative).

6

GRY

(1)

SHIELD 
(RC)

Shield for 1, 2, 4, 5, 
7 terminals

-

If open: No rearview camera image 
in reverse. 
If short to ground: No rearview 
camera image in reverse.

7

GRN SEN (RC)

Control signal for 
rearview camera

0-1 V

If open: No rearview camera image 
in reverse. 
If short to ground: No rearview 
camera image in reverse.

(1)

The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the 
insulating tube, typically black or dark gray, may not match the color of the wire listed on the 
schematic.

Terminal 

Number

Wire 

Color

Terminal 

Name

Description

Voltage 

(about)

Symptom

If open: Screen 
completely off (no 

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL

  

me 

 

Friday, June 05, 2009 3:28:15 PM

Page 38 

© 2005 Mitchell Repair Information Company, LLC.