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Home >> Lexus >> 2003 >> SC 430 >> Repair and Diagnosis >> External Pages >> Different car >> Section 516 (LEXUS Navigation System - Diagnosis) >> Circuit Inspection >> Navigation screen is not stabilized (Synchronous error). >> Inspection Procedure
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Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check the navigation ECU power source circuit (see  POWER SOURCE CIRCUIT (NAVIGATION ECU)  ). 
    1. NG: Replace or repair wire harness or connector. 
    2. OK: Go to next step 
  2. Check the display signal circuit (see  DISPLAY SIGNAL CIRCUIT  ). 
    1. NG: Replace or repair wire harness or connector. 
    2. OK: Replace the multi-display. 
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