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Navigation Display Unit Inputs and Outputs: Notes

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Navigation Display Unit 28P Connector
G08058078Courtesy of AMERICAN HONDA MOTOR CO., INC.
NAVIGATION DISPLAY UNIT 28P CONNECTOR

Terminal Number Wire Color Terminal Name Description Voltage (about) Symptom
1 WHT +B (+B power source) Continuous power source Battery voltage If open: Screen completely off (no backlight visible). If short to ground: Blows fuse No. 7 (10A) in the under-dash fuse/relay box.
2 PUR ACC (Accessory) Power source for accessory Battery voltage at ACCESSORY (I) If open: Display and buttons do not work. If short to ground: Blows fuse No. 32 (10A) in the under-dash fuse/relay box.
3 LT GRN SCTY4 (Security) Security signal to audio-navigation unit 0 V If open: The security system sets, and does not trip when navigation display unit is removed. If short to ground: The security system sets, and does not trip when navigation display unit is removed.
4 RED GA-NET BUS B-(Display bus negative) Databus(-) GA-Net 0-5 V pulses average 2.5 V depends on bus traffic If open: GA-Net related system does not work. If short to ground: GA-Net related system does not work.
5 GRN GA-NET BUS B+ (Display bus positive Databus(+) GA-Net 0-5 V pulses average 2.5 V depends on bus traffic If open: GA-Net related system does not work. If short to ground: GA-Net related system does not work.
7 GRN CAMERA BIT 1 (Mode select signal) Mode select signal for rearview camera Top down view. 8V If open: No change to rearview camera image. If short to ground: No change to rearview camera image.
9 YEL CAMERA ADAPT (Adaptive camera) Control signal for rearview camera 0V If open: No change to rearview camera image. If short to ground: No change to rearview camera image.
10 BRN(1) SIG1 SH (Shield signal) Shield for terminals No. 11, 12, 23, 24, 25 0 V If open: No change to display. If short to ground: No change to display.
11 YEL B-SIG1 (Blue signal) Blue color signal 0.7 AC average in RGB color diagnostic mode If open: Blue color missing (see RGB Color diagnosis). If short to ground: Blue color missing (see RGB Color diagnosis).
12 WHT R-SIG1 (Red signal) Red color signal 0.7 AC average in RGB color diagnostic mode If open: Red color missing (see RGB Color diagnosis). If short to ground: Red color missing (see RGB Color diagnosis).
13 GRY(1) CAMERA SH (Camera shield) Shield for terminals No. 7, 9, 14, 20, 26 0 V If open: No rearview camera image. If short to ground: No change to rearview camera image.
14 BLK CAMERA VIDEO (NTSC signal) Video signal from rearview camera 1 V AC If open: No change to rearview camera image. If short to ground: No change to rearview camera image.
15 BLK GND (Ground) (G506) Ground for display unit 0V If open: No change to display. If short to ground: No change to display.
16 YEL ILL+ (Illumination positive) Parking light on signal from dash and console lights 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 small light relay in the under-hood fuse relay box.
17 PNK(3) SCTY3 (Security) Security signal from REAR CONTROLLER and SCREEN 0 V If open: The security system sets, and does not trip when the screen is removed. If short to ground: The security system sets, and does not trip when the screen is removed.
GRY(4) SCTY1 (Security) Security signal from MICU If open: The security system sets, and does not trip when the screen is removed. If short to ground: The security system sets, and does not trip when the screen is removed.
18 BRN(2) GA-NET BUS B SH (GA-NET bus shield) Shield for display bus terminals No. 4, 5 0V If open: No change to display. If short to ground: No change to display.
20 RED CAMERA BIT 0 (Mode select signal) Mode select signal for rearview camera Normal view: 8V If open: No change to rearview camera image. If short to ground: No change to rearview camera image.
22 BRN BACK LT (Back light or reverse signal) Reverse signal of select lever from reverse relay 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 (7.5 A) in the under-dash fuse/relay box.
23 GRN C-SIG1 (Composite signal) Composite video (vertical/horizontal) synchronizing signal 0.7 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.
24 RED G-SIG1 (Green signal) Green color signal 0.7 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).
25 BLK SIG1 GND (Ground) Ground for display unit 0V If open: No change to display. If short to ground: No change to display.
26 WHT CAMERA VCC (VCC supply) Power source for rearview camera 8V If open: When put into reverse, the navigation screen goes back (backlight still operates). If short to ground: When put into reverse, the navigation screen goes back (backlight still operates).
(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 listed on the schematic.
(2) 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 listed on the schematic.
(3) With rear entertainment
(4) Without rear entertainment
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