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Home >> Toyota >> 2021 >> Mirai XLE >> Repair and Diagnosis >> Electrical >> Gauges >> Meter / Gauge System - Diagnostic Codes (3 Of 3) & Symptom Tests >> Meter / Gauge System >> Meter Illumination is Always Dark [12/2023 - ] >> Procedure

Meter Illumination is Always Dark [12/2023 - ]: Procedure

  1. CHECK VEHICLE TYPE 
    1. Check vehicle condition.

      Result

      Result  Proceed to 
      for Stereo Camera Type A
      for Mono Camera Type B

    Result: 

    B 

    See step  4

    Result: 

    A 

    See step  2

  2. CHECK FOR DTC 
    1. Check if lighting system DTCs are output.

      Body Electrical > Main Body > Trouble Codes 

      Result

      Result Proceed to
      B1244 is not output. A
      B1244 is output. B

    Result: 

    B 

    GO TO DTC B1244. Refer to  DTC B1244: Light Sensor Circuit [12/2023 - ] 

    Result: 

    A 

    See step  3

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

      Refer to REMOVAL [12/2023 - ]

      OK

      The operation of the combination meter assembly returns to normal.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END (COMBINATION METER ASSEMBLY IS DEFECTIVE) 

    Result: 

    NG 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [12/2023 - ] 

  4. CHECK FOR DTC 
    1. Check if lighting system DTCs are output.

      Body Electrical > Main Body > Trouble Codes 

      Result

      Result Proceed to
      B1244-00 is not output. A
      B1244-00 is output. B

    Result: 

    A 

    See step  3

    Result: 

    B 

    GO TO DTC B1244-00. Refer to  DTC B1244-00: Light Sensor Circuit Malfunction [12/2023 - ]