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Home >> Lexus >> 2005 >> LS 430 >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> LEXUS Navigation System - Diagnostics >> Voice Guidance Does Not Function >> Inspection Procedure

Inspection Procedure

  1. CHECK NAVIGATION SYSTEM SETTING 
    Fig 1: Displaying Menu
    G03000489Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Enter the "MENU" screen by pressing the "MENU" switch.
    2. Enter the volume adjustment screen by pressing the "Volume" switch.
      Fig 2: Identifying Off Switch
      G03000490Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check that "OFF" is not selected.

    OK: OFF is not selected. 

    NG: TURN VOICE GUIDANCE VOLUME UP TO 4 USING VOICE ADJUSTMENT SWITCHES 

    OK: GO TO NEXT STEP 

  2. CHECK NAVIGATION SETTING 
    Fig 3: Displaying Menu
    G03000491Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Enter the "MENU" screen by pressing the "MENU" switch.
    2. Enter the "Setup" screen by pressing the "Setup" switch.
      Fig 4: Displaying Setup
      G03000492Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check that "Auto Voice Guidance" is not OFF.

      OK: Auto voice guidance is not OFF. 

    4. Check if "Voice Guidance in All Modes" is ON.

      OK: Voice guidance in all modes is ON. 

    NG: TURN AUTO VOICE GUIDANCE TO "ON" 

    OK: GO TO NEXT STEP 

  3. CHECK THE MAP DISC 
    Fig 5: Identifying Map Disc
    G03000493Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Check that the map disc is not deformed or cracked.

      OK: No deformations or cracks appear on the map disc. 

    NG: REPLACE THE MAP DISC 

    OK: GO TO NEXT STEP 

  4. CHECK RADIO RECEIVER ASSY 
    1. Check if audio sound can be heard from the driver's side speaker.

      OK: Audio sound can be heard. 

    NG: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  

    OK: REPLACE NAVIGATION ECU (SEE  REPLACEMENT  )