Lexus IS250 · Service Manual BODY ELECTRICAL

Voice Guidance does not Function

Circuit diagnosis

INSPECTION PROCEDURE


1. CHECK NAVIGATION SETTING

  1. E124065E01
    Enter the "Menu" screen by pressing the "MENU" switch.

  1. Select "Volume".

  1. E124063E01
    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 step 3

2. CHECK NAVIGATION SETTING

  1. E124065E03
    Enter the "Menu" screen by pressing the "MENU" switch.

  1. Select "Set up".

  1. E124066E02
    Check that "Voice Guidance in All Modes" is not OFF.

    OK:
    Voice guidance in all modes is not OFF.



NG
TURN VOICE GUIDANCE IN ALL MODES "ON"
OK


3. CHECK NAVIGATION SETTING

  1. E124065E03
    Enter the "Menu" screen by pressing the "MENU" switch.

  1. Select "Set up".

  1. E124064E01
    Check that "Auto Voice Guidance" is not OFF.

    OK:
    Auto voice guidance is not OFF.



NG
TURN AUTO VOICE GUIDANCE "ON"
OK


4. CHECK MAP DISC

  1. I100152E12
    Check that the map disc is not deformed or cracked.

    OK:
    No deformations or cracks on map disc.



NG
REPLACE MAP DISC
OK


5. CHECK AUDIO AND VISUAL SYSTEM
  1. Check that audio sound can be heard from the driver side speaker.

    OK:
    Audio sound can be heard.



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

GO TO AUDIO AND VISUAL SYSTEM


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