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Home >> Lexus >> 2003 >> GS 300 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Infotainment >> LEXUS Navigation System (Diagnostics) >> Circuit Inspection >> 28 Any speaker does not work. >> Inspection Procedure

Inspection Procedure

  1. Is radio operating normally? 
    1. Yes : Radio assembly faulty. 
    2. No : Go to next step 
  2. Is hiss noise produced by non-functioning speaker. 
    1. Yes : Radio assembly faulty. Recheck system after repair. 
    2. No : Go to next step 
  3. Does continuity exist in speaker wire harness? 
    1. NO : Speaker wire harness faulty. 
    2. YES : Go to next step 
  4. Temporarily install another speaker. Function OK? 
    1. Yes : Speaker faulty. 
    2. NO : Power amplifier faulty. Recheck system after repair. 
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