Voice Guidance does not Function

CHECK NAVIGATION SYSTEM SETTING
1. Enter the menu screen by pressing the "MENU" switch.
2. Select "Volume".
  
  Fig 1: Identifying "Volume" Switch
  Courtesy 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

Fig 2: Identifying "OFF" Switch
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : GO TO NEXT STEP
CHECK NAVIGATION SETTING
1. Check the "MENU" screen by pressing the "MENU" switch.
2. Select "Setup".
  
  Fig 3: Identifying "Setup" Switch
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check that "Auto Voice Guidance" is not OFF.
  OK : Auto voice guidance is not OFF.
4. Check that "Voice Guidance in All Modes" is ON.
  OK : Voice guidance in all modes is ON.
NG : TURN AUTO VOICE GUIDANCE "ON"

Fig 4: Identifying "ON" Switch
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : GO TO NEXT STEP
CHECK MAP DISC
1. Check that the map disc is not deformed or cracked.
  OK : No deformations or cracks on map disc.
NG : REPLACE MAP DISC

Fig 5: Ensure Map Disc Is Not Cracked Or Deformed
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : GO TO NEXT STEP
CHECK RADIO RECEIVER ASSEMBLY
1. Check that audio sound can be heard from the driver side speaker.
  OK : Audio sound can be heard.
NG : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

OK : REPLACE NAVIGATION ECU