Guide Sound Is Not Heard

WARNING: This page is about a different car, the 2004 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK VOICE GUIDE SETTING
- While driving in the dark pink route, voice guide does not operate. (note)
- Is volume setting not switched ON?
  NOTE: Voice guide is only available at intersections that satisfy certain conditions (indicated by bull on the map). Therefore, guidance may not be given even when the route on the map changes direction.
YES or NO
1. YES: GO TO 2.
2. NO: Switch the setting ON and turn the volume up.
VOICE GUIDE HARNESS CHECK
1. Turn the ignition switch OFF.
2. Disconnect NAVI control unit connector and audio unit connector.
3. Check continuity between NAVI control unit and audio unit
  
  Fig 1: NAVI Control Unit And Audio Unit Continuity Check Table
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check continuity between NAVI control unit and ground.
  
  Fig 2: NAVI Control Unit And Ground Continuity Check Table
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: Checking Continuity Between NAVI Control Unit, Ground And Audio Unit
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 3.
2. NG :
  - Check harness for open or short between NAVI control unit and audio unit
  - Check connector housings for disconnected or loose terminals.
VOICE GUIDE ON SIGNAL CHECK
1. Connect NAVI control unit connector and audio unit connector.
2. Turn ignition switch ON.
3. Push "VOICE" switch.
4. Check the signal between NAVI control unit harness connector M58 terminal 37 (R/B) and ground with CONSULT-II or oscilloscope.
  37(R/B)-Ground: Refer to TERMINALS AND REFERENCE VALUE FOR NAVI CONTROL UNIT .
  
  Fig 4: Checking Signal Between NAVI Control Unit Harness Connector M58 Terminal 37 (R/B) And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 4.
2. NG: Replace NAVI control unit.
VOICE GUIDE SIGNAL CHECK
1. Push the "VOICE" switch.
2. Check the signal between NAVI control unit and ground with CONSULT-II or oscilloscope.
  
  Fig 5: NAVI Control Unit And Ground Voltage Check Table
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 6: Checking Signal Between NAVI Control Unit And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Replace audio unit.
2. NG: Replace NAVI control unit