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Home >> Lexus >> 2002 >> LS 430 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Infotainment >> LEXUS Navigation System - Diagnosis >> Circuit Inspection >> 17. Vehicle position is deviated from correct point badly. >> Inspection Procedure

Inspection Procedure

  1. Check mark display. (At place with fine view, is GPS mark displayed or not?) 
    1. NO:  Go to step  8.
    2. YES:  Go to next step.
  2. Does trouble occur in specific area or not? 
    1. YES:  Normal. (If vehicle is positioned in place where it is difficult to be identified, current vehicle position may be incorrectly displayed.)
    2. NO:  Go to next step.
  3. Setting check (Color of the automatic calibration button on the calibration screen). 
    1. OK:  Normal.
    2. NG:  Go to next step.
  4. Service check mode. (Is "58-43" output in unit check mode of navigation ECU?) (See  PRE-CHECK  ). 
    1. YES:  Troubleshoot for each diagnosis.
    2. NO:  Go to next step.
  5. Navigation check mode. (Vehicle signal check mode: SPD) (See  PRE-CHECK  ). 
    1. NG:  Replace or repair speed sensor wire harness.
    2. OK:  Go to next step.
  6. Recurrence test (Confirm phenomenon) (Correct current position and drive vehicle for a while with GPS mark displayed.) 
    1. OK:  Normal.
    2. NG:  Replace navigation ECU.
  7. Check connection of navigation antenna. (Bite or sharp bend) 
    1. NG:  Connect navigation antenna properly.
    2. OK:  Go to next step.
  8. Check optional components. (Does GPS mark appear if optionals such as theft deterrent system is removed?) 
    1. YES:  Remove them or change position of components.
      NOTE: Some optionals receive radio signals. This may affect GPS reception.
    2. NO:  Go to next step.
  9. 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.
  10. 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.
      NOTE: If the trouble still occurs, replace the navigation ECU.
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