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Home >> Toyota >> 2020 >> Highlander L, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 10 (Meter / Gauge System (12.3 Inch Display) - Diagnostic Codes & Circuit Tests) >> METER / GAUGE SYSTEM (for 12.3 Inch Display) >> Power Source Circuit [11/2023 - ] >> Procedure

Power Source Circuit [11/2023 - ]: Procedure

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

      Result

      Result Proceed to
      w/o Stop and Start System A
      w/ Stop and Start System B

    Result: 

    B 

    See step  3

    Result: 

    A 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Disconnect the H112 combination meter assembly connector.
    2. Measure the voltage according to the value(s) in the table below.
      GTY1113137Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Combination Meter Assembly)

      Standard Voltage

      Tester Connection Condition Specified Condition
      H112-5 (B) - Body ground Ignition switch off 11 to 14 V
      H112-6 (IG+) - Body ground Ignition switch off Below 1 V
      H112-6 (IG+) - Body ground Ignition switch ON 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    See step  5

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  3. CHECK HARNESS AND CONNECTOR (IG POWER SOURCE CIRCUIT) 
    1. Disconnect the H112 combination meter assembly connector.
    2. Measure the voltage according to the value(s) in the table below.
      GTY1118469Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Combination Meter Assembly)

      Standard Voltage

      Tester Connection Condition Specified Condition
      H112-6 (IG+) - Body ground Ignition switch off Below 1 V
      H112-6 (IG+) - Body ground Ignition switch ON 10.5 to 16 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    GO TO STOP AND START SYSTEM. Refer to  Backup Boost Converter Circuit [11/2023 - ] 

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (+B POWER SOURCE CIRCUIT) 
    1. Disconnect the H112 combination meter assembly connector.
    2. Measure the voltage according to the value(s) in the table below.
      GTY1113138Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Combination Meter Assembly)

      Standard Voltage

      Tester Connection Condition Specified Condition
      H112-5 (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  5

  5. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BODY GROUND) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H112-1 (EP) - Body ground Always Below 1 Ω
      H112-2 (ES) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2019 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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