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Home >> Toyota >> 2018 >> 4Runner TRD Pro >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter / Gauge System - Diagnostic Codes & Symptom Tests >> Meter / Gauge System >> DTC B150A: Lost Communication with HMI-LAN [08/2019 - ] >> Procedure

DTC B150A: Lost Communication with HMI-LAN [08/2019 - ]: Procedure

  1. CONFIRM MODEL 
    1. Choose the model to be inspected.

      Result

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

    Result: 

    B 

    See step  4

    Result: 

    A 

    See step  2

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

      Refer to DTC CHECK / CLEAR [08/2019 - ]

      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 [08/2019 - 08/2022]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2022 - ] 

    Result: 

    A 

    See step  3

  3. REPLACE COMBINATION METER ASSEMBLY 
    1. Replace the combination meter assembly with a new one.

      Refer to REMOVAL [08/2015 - 08/2022] , or refer to REMOVAL [08/2022 - ]

    2. Turn the ignition switch to ON and wait 30 seconds.
      NOTE:

      A maximum of 30 seconds is required to send/receive the registration information between the combination meter assembly and radio and display receiver assembly.

    3. Operate the steering pad switch assembly and check that the audio tab illuminates.
    4. Check if meter / gauge system DTCs are output.

      Refer to DTC CHECK / CLEAR [08/2015 - ]

      Result

      Result Proceed to
      The audio tab illuminates and DTC B150A is not output A
      The audio tab does not illuminate and DTC B150A is output B

    Result: 

    A 

    END (COMBINATION METER ASSEMBLY WAS DEFECTIVE) 

    Result: 

    B 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [08/2019 - ] 

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

      Refer to DTC CHECK / CLEAR [08/2019 - ]

      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 [08/2019 - 08/2022]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2022 - ] 

    Result: 

    A 

    See step  5

  5. REPLACE COMBINATION METER ASSEMBLY 
    1. Replace the combination meter assembly with a new one.

      Refer to REMOVAL [08/2015 - 08/2022] , or refer to REMOVAL [08/2022 - ]

    2. Turn the ignition switch to ON and wait 30 seconds.
      NOTE:

      A maximum of 30 seconds is required to send/receive the registration information between the combination meter assembly and navigation receiver assembly.

    3. Operate the steering pad switch assembly and check that the audio tab illuminates.
    4. Check if meter / gauge system DTCs are output.

      Refer to DTC CHECK / CLEAR [08/2015 - ]

      Result

      Result Proceed to
      The audio tab illuminates and DTC B150A is not output A
      The audio tab does not illuminate and DTC B150A is output B

    Result: 

    A 

    END (COMBINATION METER ASSEMBLY WAS DEFECTIVE) 

    Result: 

    B 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [08/2019 - ]