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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 (A/C Control Screen Only) >> Inspection Procedure
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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: Go to next step 
  3. Check "Gateway ECU (AVC-LAN adopter) circuit" (See  Gateway ECU (AVC-LAN adapter) Circuit  ) 
    1. NG : Repair or replace wire harness and connector 
    2. OK : Check and replace A/C amplifier (Center ECU). 
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