Voice Guidance does not Function

CHECK NAVIGATION SYSTEM SETTING
1. Enter the "Menu" screen by pressing the "MENU" switch.
2. Select "Volume".
  
  Fig 1: Display Menu Screen
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check that "off" is not selected.
  
  Fig 2: Display Volume Screen
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  OK: "off" is not selected.
NG: TURN VOICE GUIDANCE VOLUME UP TO 4 USING VOICE ADJUSTMENT SWITCHES

OK: Go to next step.
CHECK NAVIGATION SETTING
1. Enter the "Menu" screen by pressing the "MENU" switch.
2. Select "Setup".
  
  Fig 3: Display Menu Screen
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check that "Auto Voice Guidance" is not OFF.
  
  Fig 4: Display Setup Screen
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  OK: Auto voice guidance is not OFF.
4. Check that "Voice Guidance in All Modes" is not OFF.
  OK: Voice guidance in all modes is not OFF.
NG: TURN AUTO VOICE GUIDANCE "ON"

OK: Go to next step.
CHECK MAP DISC
1. Check that the map disc is not deformed or cracked.
  
  Fig 5: Ensure Map Disc Is Not Cracked Or Deformed
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  OK: No deformations or cracks on map disc.
NG: REPLACE MAP DISC

OK: Go to next step.
CHECK RADIO RECEIVER
1. Check that audio sound can be heard from the driver side speaker.
  OK: Audio sound can be heard.
NG: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL

OK: REPLACE NAVIGATION ECU