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Home >> Lexus >> 2003 >> GS 300 >> Repair and Diagnosis >> External Pages >> Different car >> Section 420 (LEXUS Navigation System - Diagnostics) >> Circuit Inspection >> 28. Any speaker does not work. >> Inspection Procedure
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Inspection Procedure

WARNING: This page is about a different car, the 2005 Lexus GS 430 and 2005 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
  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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