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Navigation Unit Inputs and Outputs for Connector C (8P)

WARNING: This page is about a different car, the 2008 Honda Pilot, 2007 Honda Pilot, and 2006 Honda Pilot. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Navigation Unit Inputs And Outputs For Connector C (8P) Terminals
G05594869Courtesy of AMERICAN HONDA MOTOR CO., INC.
TERMINALS REFERENCE

Terminal Number Wire Color Terminal Name Description Voltage (about) Symptom
1 WHT/BLU +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. 11 (10 A) fuse in the passenger's under-dash fuse/relay box.
2 WHT/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 No. 9 (15 A) fuse in the passenger's 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 GRN/BLK BACK LT (Back light) Reverse signal of select lever from the A/T backup light switch 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 No. 9 (10 A) fuse in the driver's 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, when moving 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 GRN/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 ignition switch ON (I or II).
NOTE: Also see symptom troubleshooting for "an inline diag" screen appears everytime the vehicle is started.
8 BLU/GRN DIAG-- (Diagnostic negative) Ground for service check signal 0 V If open: No effect on system.
If short to ground: No effect on system.