2002 Nissan-Datsun Sentra SE-R Spec VFACTORY OEM SERVICE PROCEDURE

Guide Sound is Not Heard

WARNING: This page is about a different car, the 2004 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
  1. 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 "BULLET" 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.
  2. CHECK HARNESS 
    1. Turn ignition switch OFF.
    2. Disconnect NAVI control unit connector and audio unit connector.
    3. Check continuity between NAVI control unit and audio unit.
      NAVI CONTROL UNIT AND AUDIO UNIT TERMINALS CONTINUITY

      Terminals Continuity
      NAVI control unit Audio unit
      Connector Terminal (Wire color) Connector Terminal (Wire color)
      B151 7 (B) M45 71 (B) Yes
      8 (W) 69 (W)
    4. Check continuity between NAVI control unit and ground.
      NAVI CONTROL UNIT TERMINALS CONTINUITY

      Terminals Continuity
      NAVI control unit ---
      Connector Terminal (Wire color)
      B151 7 (B) Ground No
      8 (W)
      Fig 1: Checking Continuity Between NAVI Control Unit And Audio Unit Connector Terminals
      G03513562Courtesy of NISSAN MOTOR CO., U.S.A.

    Ok or NG 

    1. OK : GO TO 3.
    2. NG : Repair harness.
  3. CHECK VOICE GUIDE 
    1. Connect NAVI control unit connector and audio unit connector.
    2. Turn ignition switch ON.
    3. Check signal between NAVI control unit harness connector B151 terminal 7 (B) and 8 (W) with CONSULT-II or oscilloscope.

      7 (B)-8 (W)  : Refer to , "TERMINALS AND REFERENCE VALUE FOR NAVI CONTROL UNIT ".

      Fig 2: Checking Voltage Signal Between NAVI Control Unit Harness Connector B151 Terminal 7 (B) And 8 (W)
      G03513563Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK : Replace audio unit. Refer to REMOVAL AND INSTALLATION FOR AUDIO UNIT
    2. NG : Replace NAVI control unit. Refer to , "REMOVAL AND INSTALLATION OF NAVI CONTROL UNIT ".
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.