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Home › Lexus › 2007 › LX 470 › Repair and Diagnosis › Accessories & Equipment › Infotainment › Navigation › Navigation System › No Navigation Screen Displayed when MAP or DEST Switch Pressed

No Navigation Screen Displayed when MAP or DEST Switch Pressed

  1. CHECK NAVIGATION ECU (SERVICE CHECK MODE) 
    1. Enter the System Check Mode (See DTC CHECK / CLEAR  ).
    2. Check the navigation ECU.

    Result: 

    RESULT REFERENCE

    Result Proceed to
    "NG" is displayed A
    "OK" is displayed B
    "NCON" is displayed C

    A: TROUBLESHOOT FOR EACH DIAGNOSIS 

    B: REPLACE MULTI-DISPLAY 

    C: Go To Next Step 

  2. CHECK NAVIGATION ECU POWER SOURCE CIRCUIT 
    1. Check the navigation ECU power source circuit (see NAVIGATION ECU POWER SOURCE CIRCUIT  ).

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go To Next Step 

  3. CHECK MULTI-DISPLAY POWER SOURCE CIRCUIT 
    1. Check the multi-display power source circuit (see MULTI-DISPLAY POWER SOURCE CIRCUIT  ).

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go To Next Step 

  4. CHECK DISPLAY SIGNAL CIRCUIT 
    1. Check the display signal circuit (see DISPLAY SIGNAL CIRCUIT BETWEEN NAVIGATION ECU AND MULTI-DISPLAY  ).

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: REPLACE MULTI-DISPLAY 

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