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Navigation Unit Inputs and Outputs for Connector B (14P)

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 B (14P) Terminals
G05488607Courtesy of AMERICAN HONDA MOTOR CO., INC.

Navigation Unit Connector B (14P) 

NAVIGATION UNIT CONNECTOR B (14P) TERMINAL REFERENCE

Terminal Number Wire Color Terminal Name Description Voltage (about) Symptom
5 PUR 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 PUR HFL MIC OUT+ (HFL mic signal positive) Microphone output signal positive 4-5 V (TALK button pressed) If open: microphone signal shown as red in diagnostic screens: Navi System Link and Functional Setup Mic Level.
If short to ground: microphone signal shown as red in diagnostic screens: Navi System Link and Functional Setup Mic Level.
10 PUR NAVI REMOTE SW (Navigation remote 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 BRN(1) RGSH (Route guidance shield) 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 LT BLU RG GND (Route guidance ground) 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 BRN(1) HFL MIC OUT SH (HFL mic signal shield) 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 LT BLU HFL MIC OUT-- (HFL mic signal negative) Ground for microphone signal 0 V If open: microphone signal shown as red in diagnostics: Navi System Link and Functional Setup Mic Level.
If short to ground: No effect on voice recognition.
(1) The shielded 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.
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