Inspection Procedure

2007 Lexus ES 350SECTION Inspection Procedure
  1. CHECK NAVIGATION SETTINGS 
    1. Enter the "Menu" screen by pressing the "MENU" switch.
    2. Select "Set up".
      Fig 1: Diagnostic Tool Display - Set Up
      G04945354Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check that "Voice Recognition Guidance" is not OFF.

      OK: Voice Recognition Guidance is not OFF. 

    Fig 2: Diagnostic Tool Display - Voice Recognition Guidance
    G05253274Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: TURN VOICE RECOGNITION GUIDANCE "ON" 

    OK: Go to Next Step 

  2. CHECK MAP DISC 
    1. Check that the map disc is not deformed or cracked.

      OK: No deformations or cracks on map disc. 

    Fig 3: Checking Map Disc
    G04945341Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE MAP DISC 

    OK: Go to Next Step 

  3. CHECK MAP DISC 
    1. Check for dirt on the map disc surface.

      OK: No dirt is on the map disc surface. 

      NOTE: Do not use a conventional record cleaner or antistatic preservative.

      HINT:

      If the disc is dirty, clean the disc by wiping the disc surface radially with a soft cloth.

    Fig 4: Cleaning Disc With Soft Cloth
    G04966906Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: CLEAN MAP DISC 

    OK: Go to Next Step 

  4. CHECK MICROPHONE (NAVIGATION CHECK MODE) 
    1. Enter the "MICROPHONE & VOICE RECOGNITION CHECK" mode (See NAVIGATION CHECK MODE  ).
    2. When voice is input into the microphone, check that the microphone input level meter changes according to the input voice.
    3. Push the recording switch and perform voice recording.

      HINT:

      Voice can be recorded up to 5 seconds.

    4. Check that the recording indicator remains on while recording and that the recorded voice is played normally without noise or distortion.

      OK: All check results are normal. 

    Fig 5: Diagnostic Tool Display - Microphone And Voice Recognition
    G05190032Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE NAVIGATION ECU 

    NG: Go to Next Step 

  5. CHECK MICROPHONE (DISPLAY CHECK MODE) 
    1. Enter the "MICROPHONE & VOICE RECOGNITION CHECK" mode (See DISPLAY CHECK MODE  ).
    2. When voice is input into the microphone, check that the microphone input level meter changes according to the input voice.
    3. Push the recording switch and perform voice recording.

      HINT:

      Voice can be recorded up to 5 seconds.

    4. Check that the recorded voice is played normally without noise or distortion.

      OK: All check results are normal. 

    Fig 6: Diagnostic Tool Display - Microphone And Voice Recognition
    G05253278Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

    OK: END 

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.