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Home >> Lexus >> 2024 >> NX 450h+ Base >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter / Gauge System - Diagnostic Codes & Circuit Tests >> Meter / Gauge System >> Steering Pad Switch with Touch Detection Malfunction [11/2021 - ] >> Procedure

Steering Pad Switch with Touch Detection Malfunction [11/2021 - ]: Procedure

  1. CHECK CAN COMMUNICATION SYSTEM 
    1. Check if CAN communication system DTCs are output.

      Refer to DIAGNOSIS SYSTEM [11/2021 - 03/2023] , or refer to DIAGNOSIS SYSTEM [03/2023 - ]

      Result

      Result Proceed to
      DTCs are not output A
      DTCs are output B

    Result: 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ] 

    Result: 

    See step  2

  2. CHECK FOR DTC 
    1. Check for DTCs.

      Body Electrical > Combination Meter > Trouble Codes 

      Result

      Result  Proceed to
      DTCs are not output A
      DTCs are output B

    Result: 

    GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2021 - 03/2024]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [03/2024 - ] 

    Result: 

    See step  3

  3. CHECK SYMPTOMS 
    1. Check the problem symptoms.

      Result

      Result Proceed to
      Some switches are malfunctioning A
      All switches malfunction B

    Result: 

    See step  10

    Result: 

    See step  4

  4. CHECK STEERING PAD SWITCH (OPERATION GUIDE DISPLAY) 
    1. Operate the steering pad switch and confirm that the operation guide is displayed correctly.

      Refer to OPERATION CHECK [11/2021 - ]

      HINT: 

      If the operation guide is displayed correctly but a switch does not operate correctly, it is suspected that the ECU controlling the respective switch is malfunctioning.

      Result

      Result Proceed to
      Operation guide display is normally
      (The operation guide is displayed for a certain amount of time and changes the display in accordance with the operated switch)
      A
      Operation guide display is abnormally
      (The operation guide is not displayed, the display does not change or the display does not hidden when a switch is operated)
      B

    Result: 

    REPLACE STEERING PAD SWITCH ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

    Result: 

    See step  5

  5. CHECK STEERING PAD SWITCH (SWITCH OPERATION) 
    1. Check the steering pad switch to identify malfunctioning switches.

      Refer to OPERATION CHECK [11/2021 - ]

      Result

      Result Proceed to
      Audio switch malfunction A
      Climate switch malfunction B
      Headup display switch malfunction C
      Meter switch malfunction D
      Panoramic view monitor system switch malfunction
      (w/ Panoramic View Monitor System)
      E
      Advanced driver assistance system switch malfunction F
      User configuration change switch malfunction G

    Result: 

    See step  7

    Result: 

    REPLACE METER MIRROR SUB-ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

    Result: 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

    Result: 

    See step  8

    Result: 

    See step  9

    Result: 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

    Result: 

    See step  6

  6. CHECK AUDIO AND VISUAL SYSTEM 
    1. Check the audio and visual system.

      Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ]

      Result

      Result Proceed to
      Audio and visual system normal A
      Audio and visual system malfunction B

    Result: 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

    Result: 

    GO TO AUDIO AND VISUAL SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ] 

  7. CHECK AIR CONDITIONING SYSTEM 
    1. Check the air conditioning system.

      Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ]

      Result

      Result Proceed to
      Air conditioning system normal A
      Air conditioning system malfunction B

    Result: 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

    Result: 

    GO TO AIR CONDITIONING SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ] 

  8. CHECK PANORAMIC VIEW MONITOR SYSTEM 
    1. Check the panoramic view monitor system.

      Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ]

      Result

      Result Proceed to
      Panoramic view monitor system normal A
      Panoramic view monitor system malfunction B

    Result: 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

    Result: 

    GO TO PANORAMIC VIEW MONITOR SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ] 

  9. CHECK ADVANCED DRIVER ASSISTANCE SYSTEM (FRONT CAMERA SYSTEM) 
    1. Check the advanced driver assistance system (front camera system).

      Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ]

      Result

      Result Proceed to
      Advanced driver assistance system (front camera system) normal A
      Advanced driver assistance system (front camera system) malfunction B

    Result: 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

    Result: 

    GO TO ADVANCED DRIVER ASSISTANCE SYSTEM (FRONT CAMERA SYSTEM). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ] 

  10. CHECK STEERING PAD SWITCH (OPERATION GUIDE DISPLAY) 
    1. Operate the steering pad switch and confirm that the operation guide is displayed correctly.

      Refer to OPERATION CHECK [11/2021 - ]

      HINT: 

      When the operation guide is displayed correctly but all of the switches do not operate correctly, a communication malfunction of the combination meter assembly is suspected.

      Result

      Result Proceed to
      Operation guide display is normally
      (The operation guide is displayed for a certain amount of time and changes the display in accordance with the operated switch)
      A
      Operation guide display is abnormally
      (The operation guide is not displayed, the display does not change or the display does not hidden when a switch is operated)
      B

    Result: 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

    Result: 

    REPLACE STEERING PAD SWITCH ASSEMBLY. Refer to  REMOVAL [11/2021 - ]