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Home >> Lexus >> 2003 >> LX 470 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Infotainment >> LEXUS Navigation System - Diagnosis >> Circuit Inspection >> Touch Switch Does Not Function (Navigation Screen Only) >> Inspection Procedure

Inspection Procedure

  1. Display check mode (Touch switch, Touch point screen). 
    1. NG : Replace the multi-display. 
    2. OK: Go to next step 
  2. Check "AVC-LAN communication circuit". (See  AVC-LAN (COMMUNICATION BUS) CIRCUIT  ) 
    1. NG : Replace or repair AVC-LAN circuit. 
    2. OK : Replace the navigation ECU. 
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