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Home >> Toyota >> 2004 >> Matrix Base, FWD, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 858 (LEXUS Navigation System - Diagnosis) >> Circuit Inspection >> 18. GPS mark does not appear. >> Inspection Procedure
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Inspection Procedure

WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check mark display. (At place with fine view, is GPS mark displayed or not?) 
    1. YES : Normal. 
    2. NO : Go to next step. 
  2. Check connection of navigation antenna. (Bite or sharp bend) 
    1. NG : Connect navigation antenna properly. 
    2. OK : Go to next step. 
  3. Check optional components. (Does GPS mark appear normally if optionals such as theft deterrent system is removed?) 
    1. YES : Remove them or change position of components. 

      HINT:

      Some optionals receive radio signals. This may affect GPS reception.

    2. NO : Go to next step. 
  4. Is there anything such as a film stuck to window or any metal object on instrument panel? 
    1. YES : Reception may be affected by a screen such as a film. 
    2. NO : Go to next step. 
  5. Service check mode. (Is "58-40, 41" is output in unit check mode of navigation ECU?) (See  PRE-CHECK  ) 
    1. YES : Troubleshoot for each diagnosis. 
    2. NO : Replace navigation antenna. 

      HINT:

      If the trouble still occurs, replace the navigation ECU.

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