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Home >> Lexus >> 2019 >> ES 350 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 253 (Meter / Gauge System (Hybrid) - Diagnostic Codes (1 Of 2)) >> METER / GAUGE SYSTEM (for HV Model) >> DTC B1321-87: Lost Communication with EMV Missing Message [06/2018 - 09/2022] >> Procedure

DTC B1321-87: Lost Communication with EMV Missing Message [06/2018 - 09/2022]: Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 300h, 2023 Lexus ES 300h, 2022 Lexus ES 300h, 2021 Lexus ES 300h, and 2020 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CONFIRM MODEL 
    1. Choose the model to be inspected.

      Result

      Result Proceed to
      w/ Navigation System A
      w/o Navigation System B

    Result: 

    B 

    See step  4

    Result: 

    A 

    See step  2

  2. CHECK FOR DTC (NAVIGATION SYSTEM) 
    1. Check if navigation system DTCs are output.

      Body Electrical > Navigation System > Trouble Codes 

      Result

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

    Result: 

    B 

    GO TO NAVIGATION SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [06/2018 - 10/2019]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2019 - 08/2021]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2021 - 09/2022] 

    Result: 

    A 

    See step  3

  3. CHECK FOR DTC (NAVIGATION SYSTEM) 
    1. Disconnect the G17 combination meter assembly connector.
    2. Check if navigation system DTCs are output.

      Body Electrical > Navigation System > Trouble Codes 

      HINT: 

      If navigation system DTCs are output, it can be judged that the radio receiver assembly could perform local bus communication line diagnosis, therefore the navigation system may not be malfunctioning.

      Result

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

    Result: 

    A 

    REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2020]  , or refer to  REMOVAL [08/2020 - 09/2022] 

    Result: 

    B 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 - ] 

  4. CHECK FOR DTC (AUDIO AND VISUAL SYSTEM) 
    1. Check if audio and visual system DTCs are output.

      Body Electrical > Navigation System > Trouble Codes 

      Result

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

    Result: 

    B 

    GO TO AUDIO AND VISUAL SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [06/2018 - 10/2019]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2019 - 08/2021]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2021 - 09/2022] 

    Result: 

    A 

    See step  5

  5. CHECK FOR DTC (AUDIO AND VISUAL SYSTEM) 
    1. Disconnect the G17 combination meter assembly connector.
    2. Check if audio and visual system DTCs are output.

      Body Electrical > Navigation System > Trouble Codes 

      HINT: 

      If audio and visual system DTCs are output, it can be judged that the radio receiver assembly could perform local bus communication line diagnosis, therefore the audio and visual system may not be malfunctioning.

      Result

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

    Result: 

    A 

    REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2020]  , or refer to  REMOVAL [08/2020 - 09/2022] 

    Result: 

    B 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 - ] 

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