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Home › Lexus › 2004 › GS 430 › Repair and Diagnosis › External Pages › Different car › Section 255 (LEXUS Navigation System - Diagnosis) › Touch Switch Does Not Function (Navigation Screen Only) › Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.
  1. DISPLAY CHECK MODE (TOUCH SWITCH CHECK) 
    1. Perform display touch switch check of display check mode.
      1. Start up the diagnosis system and perform display touch switch check of display check mode.

        Standard: Touch switch is normal 

    1. NG: CHECK AND REPLACE MULTI-DISPLAY (TFT-DISPLAY) DISPLAY 
    2. OK: GO TO NEXT STEP. 
  2. CHECK SWITCH (BEEP SOUND) 
    1. Check the switch (Beep sound).
      1. Press each touch switch on the navigation screen to check that the beep sounds are produced.

        Standard: Beep sound is normal 

    1. NG: CHECK AND REPLACE NAVIGATION ECU 
    2. OK: GO TO NEXT STEP. 

      REPAIR OR REPLACE HARNESS OR CONNECTOR BETWEEN MULTI-DISPLAY (TFT DISPLAY) DISPLAY - NAVIGATION ECU 

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