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Home >> Lexus >> 2020 >> UX 200 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 35 (Dynamic Radar Cruise Control System (Diagnostic Codes & Circuit Tests) (Hybrid)) >> DYNAMIC RADAR CRUISE CONTROL SYSTEM (for HV Model) >> Distance Control Switch Circuit [10/2018 - 07/2022] >> Procedure

Distance Control Switch Circuit [10/2018 - 07/2022]: Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus UX 250h, 2023 Lexus UX 250h, 2022 Lexus UX 250h, 2021 Lexus UX 250h, and 2020 Lexus UX 250h. However, it is still accessible from the selected car via links, so may be relevant.
  1. READ VALUE USING TECHSTREAM (VEHICLE-TO VEHICLE DISTANCE CONTROL SWITCH) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Radar Cruise 2 / Data List.
    5. 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 [10/2018 - 07/2022] 

    Result: 

    NG 

    See step  2

  2. INSPECT STEERING PAD SWITCH ASSEMBLY 
    1. Remove the steering pad switch assembly.

      Refer to REMOVAL [10/2018 - 07/2022]

    2. Inspect the steering pad switch assembly.

      Refer to INSPECTION [10/2018 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE STEERING PAD SWITCH ASSEMBLY. Refer to  COMPONENTS [10/2018 - ] 

    Result: 

    OK 

    See step  3

  3. INSPECT SPIRAL CABLE SUB-ASSEMBLY 
    1. Remove the spiral cable sub-assembly.

      Refer to REMOVAL [10/2018 - 07/2022]

    2. Inspect the spiral cable sub-assembly.

      Refer to INSPECTION [10/2018 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE SPIRAL CABLE SUB-ASSEMBLY. Refer to  COMPONENTS [10/2018 - ] 

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - FORWARD RECOGNITION CAMERA AND BODY GROUND) 
    1. Disconnect the F20 spiral cable sub-assembly connector.
    2. Disconnect the S4 forward recognition camera connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F20-6 (DIST) - S4-3 (LKSW) Always Below 1 Ω
      F20-2 (ECC) - Body ground Always Below 1 Ω
      F20-6 (DIST) or S4-3 (LKSW) - Body ground Always 10 kΩ or higher
    4. Connect the S4 forward recognition camera connector.
    5. Connect the F20 spiral cable sub-assembly connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE FORWARD RECOGNITION CAMERA. Refer to  COMPONENTS [10/2018 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR