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Home >> Toyota >> 2020 >> Corolla L >> Repair and Diagnosis >> External Pages >> Different car >> Section 353 (Meter / Gauge System (Except 12.3 Inch) Symptom Tests (2 Of 2) & Circuit Tests) >> METER / GAUGE SYSTEM (except 12.3 Inch Display) >> Power Source Circuit [09/2022 - 11/2022] >> Procedure

Power Source Circuit [09/2022 - 11/2022]: Procedure

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  1. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Disconnect the I4 combination meter assembly connector.
    2. Measure the voltage according to the value(s) in the table below.
      GTY1113136Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Combination Meter Assembly)
      *1 for TMC Made
      *2 for TMMC Made

      Standard Voltage (for TMC Made)

      Tester Connection Condition Specified Condition
      I4-5 (B) - Body ground Ignition switch off 11 to 14 V
      I4-6 (IG+) - Body ground Ignition switch off Below 1 V
      I4-6 (IG+) - Body ground Ignition switch ON 11 to 14 V

      Standard Voltage (for TMMMS Made)

      Tester Connection Condition Specified Condition
      I4-22 (B) - Body ground Ignition switch off 11 to 14 V
      I4-38 (IG+) - Body ground Ignition switch off Below 1 V
      I4-38 (IG+) - Body ground Ignition switch ON 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 (COMBINATION METER ASSEMBLY - BODY GROUND) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (for TMC Made)

      Tester Connection Condition Specified Condition
      I4-1 (EP) - Body ground Always Below 1 Ω
      I4-2 (ES) - Body ground Always Below 1 Ω

      Standard Resistance (for TMMMS Made)

      Tester Connection Condition Specified Condition
      I4-19 (EP) - Body ground Always Below 1 Ω
      I4-23 (ES) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY 

    Refer to REMOVAL [09/2022 - 11/2022]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR