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Home >> Lexus >> 2018 >> LS 500h RWD >> Repair and Diagnosis (Single Page) >> Steering >> Steering Column >> Power Tilt & Power Telescopic Steering Column System - Diagnostic Codes & Circuit Tests >> Power Tilt And Power Telescopic Steering Column System >> IG Power Source Circuit [10/2017 - 10/2023] >> Procedure
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

IG Power Source Circuit [10/2017 - 10/2023]: Procedure

  1. CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - AUXILIARY BATTERY) 
    1. Disconnect the G21 multiplex tilt and telescopic ECU connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      G21-10 (IG) - Body ground Power switch on (IG) 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 (MULTIPLEX TILT AND TELESCOPIC ECU - BODY GROUND) 
    1. Disconnect the G21 multiplex tilt and telescopic ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G21-1 (GND) - Body ground Always Below 1 Ω
      G21-8 (GND2) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MULTIPLEX TILT & TELESCOPIC ECU. Refer to  REMOVAL [10/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR