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Millimeter Wave Radar Sensor Power Source Circuit: Procedure

  1. CHECK HARNESS AND CONNECTOR (MILLIMETER WAVE RADAR SENSOR - BATTERY AND BODY GROUND) 
    NOTE:

    A DTC is stored when the following inspection is performed. Be sure to clear the DTC after performing this inspection.

    1. Disconnect the A12 millimeter wave radar sensor connector.
      Fig 1: Identifying A12 Millimeter Wave Radar Sensor Connector Terminals
      GTY259557Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A12-5 (IGB) - Body ground Engine switch on (IG) 11 to 14 V
      A12-5 (IGB) - Body ground Engine switch off Below 1 V
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A12-2 (SGND) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Millimeter Wave Radar Sensor Assembly)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   2 

  2. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE