Navigation Unit Inputs and Outputs

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

Courtesy of AMERICAN HONDA MOTOR CO., INC.

VOLTAGE SPECIFICATION

Terminal Number	Wire Color	Terminal Name	Description	Voltage (about)	Symptom
1	WHT	R SIG 1 (Red signal)	Red color signal	0.2 V AC average	If open: Red color missing (see "RGB Color" diagnostic). If short to ground: Red color missing (see "RGB Color" diagnostic).
2	RED	G SIG 1 (Green signal)	Green color signal	0.2 VAC 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).
3	GRV	SH SIG 1 (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	YEL	A/C-SI (Air conditioner serial in)	Communication signal for climate control unit	-	HVAC will not respond to navigation commands.
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. 14 (7.5 A) fuse in under-dash 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: 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 = O. 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)
9	GRY.	SH DISP BUS (GA-NET) (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.
10	GRN	DISP BUS (+) (GA-NET) (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.
11	YEL	B SIG 1 (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).
12	BRN	C SIG 1 (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.
13	BLU	GND SIG 1 (Ground signal)	Ground for color signal	0 V	If open: No change to display. If short to ground: No change to display.
14	RED	A/C-SO (Air conditioner serial out)	Communication signal for climate control unit	-	HVAC will not respond to navigation commands.
15	BLU	A/C-CLK (Air conditioner clock)	Check signal for climate control unit	-	HVAC will not respond to navigation commands.
17	BLU	JOG (Interface dial 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.
18	RED	CAN-L (CAN low)	F-CAN bus communication	Pulses 2.5-6 V average 2.5 V (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 = O. 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)
19	GRV	SH JOG (Interface dial Shield jog)	Shield for interface dial signal	-	-
20	RED	DISP BUS(-) (GA-NET) (Display bus negative)	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: Hard buttons work OK.
*: The shielded drain 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) Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

VOLTAGE SPECIFICATION

Terminal Number	Wire Color	Terminal Name	Description	Voltage (about)	Symptom
5	GRN	RG L (+) (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.
6	BLU	MIC OUT (+) (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."
10	GRN	STRG SW (Steering switches)	Steering 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.
11	GRV	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.
12	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.
13	GRV	MIC SH (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.
14	PNK	MIC OUT (-) (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.
*: The shielded drain 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) Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

VOLTAGE SPECIFICATION

Terminal Number	Wire Color	Terminal Name	Description	Voltage (about)	Symptom
1	GRN	+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 No. 23 (10 A) fuse in the under-hood 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 No. 35 (7.5 A) fuse 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	LT BLU	BACK LT-(Back light or reverse signal)	Reverse signal of select lever from "Multiplex Integrated Control Unit" (A/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 No. 14 (7.5 A) fuse in the under-dash fuse/relay box.
6	BLU	VSP (Vehicle speed pulse)	Vehicle speed pulse signal from PCM	Stopped: 10-11 V DC Average 5 V DC, when moving	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	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 any time the ignition switch is turned ON (I and II). See factory "In Line Diag" (see FACTORY DIAGNOSTIC SCREEN "IN LINE DIAG" ).
8	YEL	DIAG-(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) Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

VOLTAGE SPECIFICATION

Terminal Number	Wire Color	Terminal Name	Description	Voltage (about)	Symptom
1	-	SIG	GPS signal	5 V	If open: GPS icon on screen is white, system links screen ANT shows "NG." If short to body ground: Same as open.
2	-	SH(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) Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

VOLTAGE SPECIFICATION (USA MODELS)

Terminal Number	Wire Color	Terminal Name	Description	Voltage (about)	Symptom
1	GRN	HIP/HFL COMM3 (HFL communication 3)	Communication signal for HFL	5 V DC	Solid red HFL icon in Navi System Link. Phone icon in "route to" screen is grayed out.
2	BLK	HIP/HFL COMM4 (HFL communication 4)	Communication signal for HFL	4.5 V DC	Solid red HFL icon in Navi System Link. Phone icon in "route to" screen is grayed out.
3	RED	HIP/HFL COMM1 (HFL communication 1)	Communication signal for HFL	5 V DC	HFL icon in Navi System Link changes between red and green Phone icon in "route to" screen is grayed out.
4	WHT	HIP/HFL COMM2 (HFL communication 2)	Communication signal for HFL	4.5 V DC	HFL icon in Navi System Link changes between red and green Phone icon in "route to" screen is grayed out.
5	GRV	HIP/HFL COMM SH (Shield HFL)	Shield for No. 1,2, 3,4 terminals	0 V	-

VOLTAGE SPECIFICATION (CANADA MODELS)

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 Phone icon in "route to" screen is grayed out.
2	BLK	HFL COMM4 (HFL communication 4)	Communication signal for HFL	-	Solid red HFL icon in Navi System Link Phone icon in "route to" screen is grayed out.
3	RED	HFL COMM1 (HFL communication 1)	Communication signal for HFL	-	HFL icon in Navi System Link changes between red and green Phone icon in "route to" screen is grayed out.
4	WHT	HFL COMM2 (HFL communication 2)	Communication signal for HFL	-	HFL icon in Navi System Link changes between red and green Phone icon in "route to" screen is grayed out.
5	GRV	HFL COMM SH (Shield HFL)	Shield for No. 1,2, 3,4 terminals	-	-
*: The shielded drain 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) Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

VOLTAGE SPECIFICATION

Terminal Number	Wire Color	Terminal Name	Description	Voltage (about)	Symptom
G1	WHT	VCC (VCC supply)	Power source for rearview camera	8 V	If open: No rearview camera image. If short to ground: When put into reverse, the navigation screen goes black (backlight still operative).
G2	RED	GND (Ground)	Ground for rearview camera	0 V	If open: No change to rearview camera image. If short to ground: No change to rearview camera image.
G4	YEL	CAMERA V GND (Ground camera)	Ground for rearview camera signal	0 V	If open: No change to rearview camera image. If short to ground: No change to rearview camera image.
G5	BLK	CAMERA V (Video camera),	Video signal for rearview camera	0.3 VAC	If open: No rearview camera image. If short to ground: When put into reverse, the navigation screen goes black (backlight still operative).
G6	GRY	CAMERA SH (Shield camera)	Shield for No. 1 to No. 7 terminals	0 V	If open: No change to rearview camera image. If short to ground: No change to rearview camera image.
G7	GRN	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.