Navigation Unit Inputs and Outputs

Fig 1: Identifying Navigation Unit Connector A (20P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

NAVIGATION UNIT CONNECTOR REFERENCE

Terminal Number

Wire Color

Terminal Name

Description

Voltage (about)

Symptom

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).

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).

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.

ORN

A/C-SI (Air conditioner serial in)

Communication signal for climate control unit

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.

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:

System Links FI-ECU, and Meter both show "NG."
F-CAN diagnostic = "NG."
B-CAN diagnostic = "NG."
Car status CHG (CAN) = 0.
Functional Setup, Trip info, FUP & Sampled FL = 0.

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

B1168 Gauge Control Module loss of Comm. (Engine)
B1169 Gauge Control Module loss of Comm. (A/T)
B1178 F-CAN communication Circuit error.
U0073 (F-CAN bus off)
U0155 (F-CAN Gauge control module)
U0121 (F-CAN VSA control)

GRY⁽¹⁾

SH DISP BUS (Shield display bus)

Shield for display bus No. 10, 20 terminals

0 V

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

GRN

DISP BUS (+) (Display bus positive)

Data bus (+) GA-Net

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

If open: Navigation buttons do not work.
If short to ground: Navigation buttons do not work.

⁽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.

Navigation Unit Connector A (20P)

NAVIGATION UNIT CONNECTOR REFERENCE

Terminal Number

Wire Color

Terminal Name

Description

Voltage (about)

Symptom

YEL

BSIG (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

CSIG (Composite signal)

Composite video (vertical/horizontal) Synchronizing signal

0.2 VAC 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 SIG (Ground signal)

Ground for color signal

0 V

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

PUR

A/C-SO (Air conditioner serial out)

Communication signal for climate control unit

BRN

A/C-CLK (Air conditioner clock)

Check signal for climate control unit

WHT

JOG (Jog)

Interface dial operation signal

0-5 V pulses

If open: You cannot operate navigation system
If short to ground: You cannot operate navigation system

BLK

CAN-L (CAN low)

F-CAN bus communication

Pulses 2.5-6 V 2.5 V average (depends on Bus traffic)

If open:

System Links PCM, and Gauge Control Module both show "NG."
F-CAN diagnostic = "NG."
B-CAN diagnostic = "NG."
Car status CHG (CAN) = 0.
Functional Setup, Trip info, FUP & Sampled FL = 0.

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

B1168 Gauge Control Module loss of Comm. (Engine)
B1169 Gauge Control Module loss of Comm. (A/T)
B1178 F-CAN communication Circuit error.
U0073 (F-CAN bus off)
U0155 (F-CAN Gauge control module)
U0121 (F-CAN VSA control)

GRY⁽¹⁾

SH JOG (Shield jog)

Shield for interface dial signal

RED

DISP BUS(-) (Display bus negative)

Data bus (-) GA-Net

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

If open: Navigation buttons do not work.
If short to ground: Hard buttons work OK.

⁽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.

Fig 1: Identifying Navigation Unit Connector B (14P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

NAVIGATION UNIT CONNECTOR REFERENCE

Terminal Number

Wire Color

Terminal Name

Description

Voltage (about)

Symptom

GRN

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

GRN

MIC SIG (+) (Mic signal positive)

Microphone output signal positive

4-5 V (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."

PUR

STRG SW (Steering wheel switches)

Steering wheel switch output

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

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

GRY⁽¹⁾

SH RG (Shield route guidance)

Shield for No. 5,12 terminals

0 V

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

RED

GND RG (Ground route guidance)

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⁾

SHMIC (Shield mic)

Shield for No. 6,14 terminals

0 V

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

RED

GND MIC (Ground mic)

Ground for microphone signal

0 V

If open: No microphone signal shown in diagnostics: "Navi System Link" and Functional Setup "Mic Level."
If short to ground: No effect on voice recognition.

⁽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.

Fig 1: Identifying Navigation Unit Connector C (8P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

NAVIGATION UNIT CONNECTOR REFERENCE

Terminal Number	Wire Color	Terminal Name	Description	Voltage (about)	Symptom
1	WHT	+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(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.

Fig 1: Identifying Navigation Unit Connector E (2P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

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.

Fig 1: 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

WHT

HFL COMM3 (HFL communication 3)

Communication signal for HFL

5 V DC

Solid red HFL icon in Navi System Link

RED

HFL COMM4 (HFL communication 4)

Communication signal for HFL

4.5 V DC

Solid red HFL icon in Navi System Link

GRN

HFL COMM1 (HFL communication 1)

Communication signal for HFL

5 V DC

HFL icon in Navi System Link changes between red and green

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

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.

Without AcuraLink

NAVIGATION UNIT CONNECTOR REFERENCE

Terminal Number

Wire Color

Terminal Name

Description

Voltage (about)

Symptom

GRN

HFL COMM3 (HFL communication 3)

Communication signal for HFL

Solid red HFL icon in Navi System Link

BLK

HFL COMM4 (HFL communication 4)

Communication signal for HFL

Solid red HFL icon in Navi System Link

RED

HFL COMM1 (HFL communication 1)

Communication signal for HFL

HFL icon in Navi System Link changes between red and green

WHT

HFL COMM2 (HFL communication 2)

Communication signal for HFL

HFL icon in Navi System Link changes between red and green

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.

Fig 1: Identifying Navigation Unit Connector G (7P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

NAVIGATION UNIT CONNECTOR REFERENCE

Terminal Number

Wire Color

Terminal Name

Description

Voltage (about)

Symptom

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.

BLK

GND (RC)

Ground for rearview camera

0 V

If open: No rearview camera image in reverse.

RED

VIDEO GND (RC)

Ground for rearview camera video signal

0 V

If open: No rearview camera image in reverse.

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).

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.

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.