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Home >> Lexus >> 2003 >> GS 430 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Infotainment >> LEXUS Navigation System (Diagnostics) >> Circuit Inspection >> 16. Touch switch does not function. (A/C control 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 : Go to next step 
  3. Check multiplex communication circuit (See  MULTIPLEX COMMUNICATION SYSTEM  ). 
    1. NG : Replace or repair multiplex communication circuit. 
    2. OK : Replace A/C amplifier. 
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