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Home >> Lexus >> 2021 >> RC F Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Dynamic Radar Cruise Control System - Diagnostic Codes & Circuit Tests >> Dynamic Radar Cruise Control System >> Millimeter Wave Radar Sensor Power Source Circuit [09/2014 - 11/2017] >> Procedure

Millimeter Wave Radar Sensor Power Source Circuit [09/2014 - 11/2017]: Procedure

  1. CHECK TERMINAL VOLTAGE (POWER SOURCE OF MILLIMETER WAVE RADAR SENSOR ASSEMBLY) 
    1. Disconnect the B7 millimeter wave radar sensor assembly connector.
      GTY509830Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Millimeter Wave Radar Sensor Assembly)
    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      B7-5 (IGB) - Body ground Engine switch on (IG) 11 to 14 V
      B7-5 (IGB) - Body ground Engine switch off Below 1 V

      Standard Resistance

      Tester Connection Condition Specified Condition
      B7-1 (SGND) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [09/2014 - 11/2017] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - BATTERY AND BODY GROUND)