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Home >> Toyota >> 2025 >> Prius Plug-In Hybrid SE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 20 (Can Communication System (HEV) - Circuit Tests (2 Of 3)) >> CAN COMMUNICATION SYSTEM (for HEV Model) >> Millimeter Wave Radar Sensor Communication Stop Mode [12/2022 - ] >> Procedure

Millimeter Wave Radar Sensor Communication Stop Mode [12/2022 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Disconnect the cable from the negative (-) auxiliary battery terminal.
    2. Disconnect the A21 millimeter wave radar sensor assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A21-5 (SGND) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω
    4. Reconnect the cable to the negative (-) auxiliary battery terminal.
    5. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      A21-1 (IGB) - Body ground Ignition switch ON 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY 

    Refer to REMOVAL [12/2022 - 03/2023] , or refer to REMOVAL [03/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

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