Navigation Unit Inputs and Outputs

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2014 Honda Ridgeline, 2013 Honda Ridgeline, 2012 Honda Ridgeline, 2011 Honda Ridgeline, and 2010 Honda Ridgeline. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Navigation Unit Connector A (8P) Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Navigation Unit Connector A (8P)

VOLTAGE SPECIFICATION

Terminal Number	Wire Color	Terminal Name	Description	Voltage (about)	Symptom
1	WHT/RED	+B (+B Power source)	Continuous power source	Battery voltage	If open: Display picture goes out (display back light still on). NOTE: System will reboot to enter code screen. If short to ground: Blows fuse No. 7 (7.5 A) in the under-dash fuse/relay box.
2	YEL/RED	ACC (Accessory)	Power source for accessories	Battery voltage at ACC (I)	If open: Display picture goes out (display back light still on). NOTE: When re-connected the system will reboot to enter code screen. If short to ground: Blows fuse No. 32 (10 A) in the driver's under-dash fuse/relay box.
4	BLK	GND (Ground) (G501)	Ground for navigation unit	0.2 V or less	If open: No effect on system. If short to ground: No effect on system.
5	GRN	BACK LT (Back light or reverse signal)	Reverse signal of select lever from A/T reverse relay	In reverse, battery voltage: Otherwise 0 V	If open: Navigation never sees the reverse signal and back-up camera does not come on when in reverse. Diagnostic screen Car Status, Back = 0. If short to ground: Blows fuse No. 21 (7.5 A) in the under-dash fuse/relay box.
6	BLU/WHT	VSP (Vehicle speed pulse)	Vehicle speed pulse signal from PCM	Pulses 0-5 V: Average 2.5 V (depends on bus traffic)	If open: No vehicle speed signal pulse. Diagnostic screen Car Status, VSP Navi = 0. If short to ground: No vehicle speed pulses. Diagnostic screen Car Status, VSP Navi = 0.
7	GRY/RED	DIAG+ (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 at key ACCESSORY (I) and ON (II).
8	GRN/YEL	DIAG-(Diagnostic negative)	Ground for service check signal	0.2 V or less	If open: The system will not go into diagnostic mode when using the SCS jumper. If short to ground: No effect on system.

Fig 2: Identifying Navigation Unit Connector B (32P) Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Navigation Unit Connector B (32P)

VOLTAGE SPECIFICATION

Terminal Number

Wire Color

Terminal Name

Description

Voltage (about)

Symptom

WHT

R SIG1 (Red signal)

Red color signal

0.2 V AC average in RGB color diagnostic mode

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

RED

G SIG1 (Green signal)

Green color signal

0.2 V AC average in RGB color diagnostic mode

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

GRY⁽¹⁾

SH SIG1 (Shield signal)

Shield for terminals No. 1, 2, 17, 18, 19

0 V

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

WHT/BLU

AC-SI (A/C Signal input)

Communication signal for climate control unit

HVAC will not respond to navigation commands.

RED/BLK

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 fuse No. 4 (15 A) in the under-hood fuse/relay box.

GRY⁽¹⁾

GA-NET SH ECU BUS (Shield display bus)

Shield for display bus terminals No. 10, 26

0 V

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

LT GRN

GA-NET ECU BUS+ (Display bus positive)

Data bus+ GA-NET

0-5 V pulses average 2.5 V (depends on bus traffic)

If open: Navigation buttons, touch screen and XM radio do not work.
If short to ground: Navigation buttons and touch screen do not work.

YEL

B SIG1 (Blue signal)

Blue color signal

0.2 V AC average in RGB color diagnostic mode

If open: Blue color missing (see RGB Color diagnostic).
If short to ground: Blue color missing (see RGB Color diagnostic).

BRN

C SIG1 (Composite signal)

Composite video (vertical/horizontal) Synchronizing signal

0.2 V AC average in RGB color diagnostic mode

If open: Picture rolls horizontally, colors still visible.
If short to ground: Picture rolls horizontally, colors still visible.

BLU

GND SIG1 (Ground signal)

Ground for color signal

0 V

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

WHT/RED

AC-SO1 (A/C Signal output)

Communication signal for climate control unit

HVAC will not respond to navigation commands.

WHT/BLK

AC-CLK1 (A/C Clock signal)

Check signal for climate control unit

HVAC will not respond to navigation commands.

PUR

GA-NET ECU BUS-(Display bus negative)

Data bus - GA-NET

0-5 V pulses normally 2.5 V (depends on bus traffic)

If open: Navigation buttons, touch screen and XM radio do not work.
If short to ground: Hard and touch buttons work OK.

⁽¹⁾	The shielded wires have a heat-shrink 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 shown on the circuit diagram.

Fig 3: Identifying Navigation Unit Connector C (16P) Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Navigation Unit Connector C (16P)

VOLTAGE SPECIFICATION

Terminal Number

Wire Color

Terminal Name

Description

Voltage (about)

Symptom

BLU

GA-NET ECU2 BUS+

Data bus+ GA-NET

0-5 V pulses average 2.5 V (depends on bus traffic)

If open: XM radio navigation buttons, and touch screen do not work.
If short to ground: XM radio on the navi screen navigation buttons, and touch screen do not work.

WHT

RGL+ (Route guidance voice left positive)

Left audio signal of voice guidance, and Voice Recognition (VR) prompts

Audio signal 0.004-0.04 V

If open: If voice activated, radio speakers buzz; if voice off, no effect.
If short to ground: If voice activated, radio speakers buzz; if voice off, no effect.

GRN

MIC SIG+ (Mic signal positive)

Microphone output signal positive

4-5 V (with navigation TALK button pressed)

If open: No microphone signal shown in diagnostic screens: Navi System Link and Functional Setup Mic Level.
If short to ground: No microphone signal shown in diagnostic screens: Navi System Link and Functional Setup Mic Level.

PNK

GA-NET ECU2 BUS-

Data bus - GA-NET

0-5 V pulses average 2.5 V (depends on bus traffic)

If open: XM radio navigation buttons, and touch screen do not work.
If short to ground: XM radio on the navi screen navigation buttons, and touch screen do not work.

GRY⁽¹⁾

GA-NET ECU2 BUS SH

Shield for terminals No. 2, 10

0 V

If open: No effect on navigation or XM radio.
If short to ground: No effect on navigation or XM radio.

GRY

STRG SW (Navigation remote switches)

Steering switch output

4-5 V (navigation TALK button pressed) 2.5-3 V (navigation BACK button pressed)

If open: Steering wheel navigation TALK, and navigation BACK switch/buttons do not work.
If short to ground: Steering wheel navigation TALK, and navigation BACK switch/buttons do not work.

GRY⁽¹⁾

RG L SH (Shield route guidance)

Shield for terminals No/7, 14

0 V

If open: No effect on voice output.
If short to ground: No effect on voice output.

BLU/RED

RG L GND (Route guidance ground)

Ground for voice guidance, and Voice Recognition (VR) prompts

0 V

If open: No effect on voice output.
If short to ground: No effect on voice output.

GRY⁽¹⁾

SH MIC (Shield mic)

Shield for terminals No. 8, 16

0 V

If open: No effect on voice recognition.
If short to ground: No effect on voice recognition.

⁽¹⁾	The shielded wires have a heat-shrink 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 shown on the circuit diagram.

Fig 4: Identifying Navigation Unit Connector D (5P) Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Navigation Unit Connector D (5P)

VOLTAGE SPECIFICATION

Terminal Number

Wire Color

Terminal Name

Description

Voltage (about)

Symptom

RED

HFL COMM3 (HFL communication 3)

Communication signal for HFL

Solid red XM icon and/or HFL icon in Navi System Link

WHT

HFL COMM4 (HFL communication 4)

Communication signal for HFL

Solid red XM icon and/or HFL icon in Navi System Link

BLK

HFL COMM1 (HFL communication 1)

Communication signal for HFL

XM icon and/or HFL icon in Navi System Link changes between red and green

GRN

HFL COMM2 (HFL communication 2)

Communication signal for HFL

XM icon and/or HFL icon in Navi System Link changes between red and green

GRY⁽¹⁾

HFL COMM SH (HFL communication shield)

Shield for terminals No. 1, 2, 3, 4

⁽¹⁾	The shielded wires have a heat-shrink 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 shown on the circuit diagram.

Fig 5: Identifying Navigation Unit Connector E (7P) Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Navigation Unit Connector E (7P)

VOLTAGE SPECIFICATION

Terminal Number

Wire Color

Terminal Name

Description

Voltage (about)

Symptom

RED

CAMERA VCC (VCC supply)

Power source for rearview camera

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

WHT

CAMERA VIDEO (Video camera)

Video signal for rearview camera

0.3 V

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

GRY⁽¹⁾

CAMERA SH (Shield camera)

Shield for terminal No. 1, 5, 7

0 V

If open: No change to rearview camera image.
If short to ground: No change to rearview camera image.

BLK

CAMERA ADPT (Adaptive camera)

Control signal for rearview camera

0 V

If open: No change to rearview camera image.
If short to ground: No change to rearview camera image.

⁽¹⁾	The shielded wires have a heat-shrink 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 shown on the circuit diagram.

Fig 6: Identifying Navigation Unit Connector F (2P) Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Navigation Unit Connector F (2P)

VOLTAGE SPECIFICATION

Terminal Number	Wire Color	Terminal Name	Description	Voltage (about)	Symptom
1	--	GPS	GPS signal (5 V in, GPS signal out)	5V	If open: GPS icon on screen is white, system links screen ANT shows NG. If short to ground: Same as open.
2	--	GPS SH	Shield for No. 1 terminal	0 V	If open: GPS icon on screen is white, system links screen ANT shows NG. If short to ground: No effect on system.