Navigation Unit Inputs and Outputs for Connector A (20P)

WARNING: This page is about a different car, the 2008 Acura TSX, 2007 Acura TSX, and 2006 Acura TSX. However, it is still accessible from the selected car via links, so may be relevant.

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

Courtesy of AMERICAN HONDA MOTOR CO., INC.

NAVIGATION UNIT INPUTS AND OUTPUTS FOR CONNECTOR A (20P)

Terminal Number	Wire Color	Terminal Name	Description	Voltage (about)	Symptom
1	WHT	R SIG (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).
2	RED	G SIG (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).
3	GRY	SH SIG (Shield signal)	Shield for terminal No. 1, 2, 11, 12, 13	0V	If open: No change to display. If short to ground: No change to display.
5	RED/BLK	ILL (+) (Illumination positive)	Parking light on signal from dash and console lights	Lights on = battery voltage, Lights off = 0V	If open: When brightness = "Auto", night mode for the display is inoperative when lights on. If short to ground: Blows No. 4 (10 A) fuse in the under-hood fuse/relay box.
8	WHT	CAN-H (CAN high)	F-CAN bus communication	2.5-6 V Pulses 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 into, 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) U0121 (F-CAN TCS control)
9	GRN/BLK	SH DISP BUS (Shield display bus)	Shield for display bus terminal No. 10,20	0 V	If open: No change to display. If short to ground: No change to display.
10	RED/WHT	DISP BUS (+) (Display bus positive)	Data bus (+) GA-Net	0V-5V pulses average 2.5 V depends on bus traffic	If open: Navigation buttons and touch screen do not work. If short to ground: Navigation buttons and touch screen do not work.
11	YEL	B SIG (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 (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 (Ground signal)	Ground for color signal	0 V	If open: No change to display. If short to ground: No change to display.
18	RED	CAN-L (CAN low)	F-CAN bus communication	2.5-6 V Pulses average 2.5 V (Depends on F-CAN communication traffic)	If open: System Links ECM/PCM, and Gauge Control Module both show "NG". F-CAN diagnostic = "NG". B-CAN diagnostic = "NG". Car status CHG (CAN) = 0. Functional Setup, Trip into, 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) U0121 (F-CAN TCS control)
20	RED/BLU	DISP BUS (-) (Display bus negative)	Data bus (-) GA-Net	0.5 V pulses average 2.5 V (depends on Bus traffic)	If open: Navigation buttons and touch screen do not work. If short to ground: Hard and touch buttons work OK.