Voice Guidance does not Function

WARNING: This page is about a different car, the 2006 Lexus GS 430 and 2006 Lexus GS 300. 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: 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