Voice Guidance does not Function

WARNING: This page is about a different car, the 2006 Lexus RX 400h. However, it is still accessible from the selected car via links, so may be relevant.

CHECK NAVIGATION SYSTEM SETTING
1. Enter the "Menu" screen by pressing the "MENU" switch.
2. Select "Volume".
  
  Fig 1: Display - MENU
  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 Display
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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
  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 not OFF.
  OK: Voice guidance in all modes is not OFF.
NG: TURN AUTO VOICE GUIDANCE "ON"

Fig 4: Display - Auto Voice Guidance
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
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