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Home >> Lexus >> 2019 >> ES 350 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 57 (Audio / Video System (For 12.3 Inch Display) - Diagnostic Codes (1 Of 2)) >> AUDIO AND VISUAL SYSTEM (for 12.3 Inch Display) >> DTC B15D9-87: Operation Panel Missing Message [09/2022 - ] >> Procedure

DTC B15D9-87: Operation Panel Missing Message [09/2022 - ]: Procedure

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  1. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY - AUXILIARY BATTERY AND BODY GROUND) 
    1. Disconnect the G23 air conditioning control assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G23-4 (E) - Body ground Always Below 1 Ω
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      G23-7 (ACC) - Body ground Ignition switch ACC 11 to 14 V
      G23-8 (IG+) - Body ground Ignition switch ON 11 to 14 V
      G23-16 (+B) - Body ground Always 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY - MULTI-DISPLAY ASSEMBLY) 
    1. Disconnect the G23 air conditioning control assembly connector.
    2. Disconnect the G22 multi-display assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G23-1 (TX1+) - G22-6 (TX1+) Always Below 1 Ω
      G23-2 (TX1-) - G22-18 (TX1-) Always Below 1 Ω
      G23-1 (TX1+) or G22-6 (TX1+) - Body ground Always 10 kΩ or higher
      G23-2 (TX1-) or G22-18 (TX1-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  3

  3. REPLACE AIR CONDITIONING CONTROL ASSEMBLY 
    1. Replace the air conditioning control assembly with a new or known good one.

      Refer to REMOVAL [08/2021 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  4

  4. CLEAR DTC 
    1. Clear the DTCs.

      Body Electrical > Navigation System > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  5

  5. CHECK FOR DTC 
    1. Turn the ignition switch off.
    2. Turn the ignition switch to ON and wait for 60 seconds.
    3. Turn the ignition switch off.
    4. Turn the ignition switch to ON and wait for 60 seconds.
    5. Recheck for DTCs and check that no DTCs are output.

      Body Electrical > Navigation System > Trouble Codes 

      Result

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

    Result: 

    A 

    END (AIR CONDITIONING CONTROL ASSEMBLY IS DEFECTIVE) 

    Result: 

    B 

    REPLACE MULTI-DISPLAY ASSEMBLY. Refer to  REMOVAL [08/2021 - ] 

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