2018 Toyota Prius Two EcoFACTORY OEM SERVICE PROCEDURE

Distance Control Switch Circuit [07/2020 - ]: Procedure

  1. READ VALUE USING TECHSTREAM (Radar Cruise2) 
    1. Read the Data List according to the display on the Techstream.

      Powertrain > Radar Cruise2 > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Vehicle-to-vehicle Distance Control Switch Vehicle-to-vehicle distance control switch signal ON or OFF ON: Vehicle-to-vehicle distance control switch pushed
      OFF: Vehicle-to-vehicle distance control switch not pushed      		 -

      Powertrain > Radar Cruise2 > Data List 

      Tester Display
      Vehicle-to-vehicle Distance Control Switch

      OK

      The value of the Data List item changes according to the operation of the vehicle-to-vehicle distance control switch.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [07/2020 - ] 

    Result: 

    NG 

    See step  2

  2. INSPECT STEERING PAD SWITCH ASSEMBLY 

    Refer to INSPECTION [12/2018 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE STEERING PAD SWITCH ASSEMBLY. Refer to  REMOVAL [07/2020 - ] 

    Result: 

    OK 

    See step  3

  3. INSPECT SPIRAL CABLE SUB-ASSEMBLY 

    Refer to INSPECTION [12/2018 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE SPIRAL CABLE SUB-ASSEMBLY. Refer to  REMOVAL [07/2020 - ] 

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - FORWARD RECOGNITION CAMERA AND BODY GROUND) 
    1. Disconnect the O7 forward recognition camera connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      (F21, O7)

      (F21)

      (O7)

      Tester Connection Condition Specified Condition
      F21-12 (DIST) - O7-3 (LKSW) Always Below 1 Ω
      F21-2 (ECC) - Body ground Always Below 1 Ω
      F21-12 (DIST) or O7-3 (LKSW) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE FORWARD RECOGNITION CAMERA. Refer to  REMOVAL [07/2020 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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  • • You smell fuel, burning insulation, or see smoke.
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