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

WARNING: This page is about a different car, the 2009 Acura MDX, 2008 Acura MDX, and 2007 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

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

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Navigation Unit Connector C (8P)

NAVIGATION UNIT CONNECTOR C (8P) TERMINAL 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. 5 (10 A) in the under-dash fuse/relay box.
2	PUR	ACC (Accessory)	Power source for accessories	Battery voltage at ACC (1)	If open: Display picture goes out (display back light still on). If short to ground: Blows fuse No. 32 (10 A) in the under-dash fuse/relay box.
4	BLK	GND (Ground) (G605)	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 (7.5 A) in the driver's under-dash fuse/relay box.
6	BLU	VSP (Vehicle speed pulse)	Vehicle speed pulse signal from PCM	0-5 V pulses 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	GRY	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 key ON (I) and (II).
8	YEL	DIAG--(Diagnostic negative)	Ground for service check signal	0 V	If open: The system will not go into diagnostic mode when using the SCS jumper. If short to ground: No effect on system.