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Home >> Nissan-Datsun >> 2002 >> Sentra SE-R, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 933 (LEXUS Navigation System - Diagnosis) >> Circuit Inspection >> 17. Vehicle position is deviated from correct point badly. >> 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. NO : Go to step   7 . 
    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 (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
    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 (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
  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 are 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. 
  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 (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 

      HINT:

      If the trouble still occurs, replace the navigation ECU.

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