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Home >> Lexus >> 2001 >> LS 430 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Infotainment >> LEXUS Navigation System >> Circuit Inspection >> 35. Navigation system cannot be operated with voice recognition. >> Inspection Procedure

Inspection Procedure

  1. Check microphone. 
    1. NG: Replace microphone. 
    2. OK: Go to next step. 
  2. Check overhead J/B. 
    1. NG: Replace overhead J/B. 
    2. OK: Go to next step. 
  3. Check wire harness between overhead J/B and telephone transceiver and speaker relay. 

    PREPARATION: 

    Disconnect the overhead J/B and telephone transceiver and speaker relay connectors.

    CHECK: 

    Check continuity of the wire harness between terminals of the overhead J/B and those of the telephone receiver and speaker relay.

    OK: Continuity 

    1. NG: Replace or repair wire harness or connector. 
    2. OK: Go to next step. 
  4. Check wire harness between navigation ECU and telephone transceiver and speaker relay. 

    PREPARATION: 

    Disconnect the navigation ECU and telephone transceiver and speaker relay connectors.

    CHECK: 

    Check continuity of the wire harness between terminals of the navigation ECU and those of the telephone receiver and speaker relay.

    OK: Continuity 

    1. NG: Replace telephone transceiver and speaker relay. 
    2. OK: Replace or repair wire harness or connector. 
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