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Home >> Lexus >> 2019 >> ES 350 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 231 (Parking Support Alert System - Diagnostic Codes & Circuit Tests) >> Parking Support Alert System >> Sensor Frozen Indication (Dirty or Frozen) [09/2022 - ] >> Procedure

Sensor Frozen Indication (Dirty or Frozen) [09/2022 - ]: Procedure

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  1. READ VALUE USING GTS 
    1. Connect the GTS to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the GTS on.
    4. Enter the following menus: Body Electrical / Clearance Warning / Data List.
    5. Read the Data List according to the display on the GTS.

      Body Electrical > Clearance Warning > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Ultrasonic Sensor (Front Right Center) Temporarily Unavailable - Circuit Open Open circuit status of the ultrasonic sensor NO/YES NO: No sensor open circuit
      YES: Sensor open circuit      		 RoB X20C4 is output if YES
      Ultrasonic Sensor (Front Right Center) Temporarily Unavailable - Freeze/Dirt Frozen/dirty status of the ultrasonic sensor NO/YES NO: Sensor not frozen/dirty
      YES: Sensor frozen/dirty      		 RoB X20C4 is output if YES
      Ultrasonic Sensor (Front Right Center) Temporarily Unavailable - Foreign Material Fixing Foreign matter stuck status of the ultrasonic sensor NO/YES NO: Foreign matter not stuck on sensor
      YES: Foreign matter stuck on sensor      		 RoB X20C4 is output if YES
      Ultrasonic Sensor (Front Right Center) Temporarily Unavailable - Parameter Malfunction Parameter malfunction status of the ultrasonic sensor NO/YES NO: No sensor parameter malfunction
      YES: Sensor parameter malfunction      		 RoB X20C4 is output if YES
      Ultrasonic Sensor (Front Right Center) Temporarily Unavailable - Flowing Water Continuously Continuous running water status of the ultrasonic sensor NO/YES NO: No sensor continuous running water
      YES: Sensor continuous running water      		 RoB X20C4 is output if YES
      Ultrasonic Sensor (Front Left Center) Temporarily Unavailable - Circuit Open Open circuit status of the ultrasonic sensor NO/YES NO: No sensor open circuit
      YES: Sensor open circuit      		 RoB X20C5 is output if YES
      Ultrasonic Sensor (Front Left Center) Temporarily Unavailable - Freeze/Dirt Frozen/dirty status of the ultrasonic sensor NO/YES NO: Sensor not frozen/dirty
      YES: Sensor frozen/dirty      		 RoB X20C5 is output if YES
      Ultrasonic Sensor (Front Left Center) Temporarily Unavailable - Foreign Material Fixing Foreign matter stuck status of the ultrasonic sensor NO/YES NO: Foreign matter not stuck on sensor
      YES: Foreign matter stuck on sensor      		 RoB X20C5 is output if YES
      Ultrasonic Sensor (Front Left Center) Temporarily Unavailable - Parameter Malfunction Parameter malfunction status of the ultrasonic sensor NO/YES NO: No sensor parameter malfunction
      YES: Sensor parameter malfunction      		 RoB X20C5 is output if YES
      Ultrasonic Sensor (Front Left Center) Temporarily Unavailable - Flowing Water Continuously Continuous running water status of the ultrasonic sensor NO/YES NO: No sensor continuous running water
      YES: Sensor continuous running water      		 RoB X20C5 is output if YES
      Ultrasonic Sensor (Front Right Corner) Temporarily Unavailable - Circuit Open Open circuit status of the ultrasonic sensor NO/YES NO: No sensor open circuit
      YES: Sensor open circuit      		 RoB X20C6 is output if YES
      Ultrasonic Sensor (Front Right Corner) Temporarily Unavailable - Freeze/Dirt Frozen/dirty status of the ultrasonic sensor NO/YES NO: Sensor not frozen/dirty
      YES: Sensor frozen/dirty      		 RoB X20C6 is output if YES
      Ultrasonic Sensor (Front Right Corner) Temporarily Unavailable - Foreign Material Fixing Foreign matter stuck status of the ultrasonic sensor NO/YES NO: Foreign matter not stuck on sensor
      YES: Foreign matter stuck on sensor      		 RoB X20C6 is output if YES
      Ultrasonic Sensor (Front Right Corner) Temporarily Unavailable - Parameter Malfunction Parameter malfunction status of the ultrasonic sensor NO/YES NO: No sensor parameter malfunction
      YES: Sensor parameter malfunction      		 RoB X20C6 is output if YES
      Ultrasonic Sensor (Front Right Corner) Temporarily Unavailable - Flowing Water Continuously Continuous running water status of the ultrasonic sensor NO/YES NO: No sensor continuous running water
      YES: Sensor continuous running water      		 RoB X20C6 is output if YES
      Ultrasonic Sensor (Front Left Corner) Temporarily Unavailable - Circuit Open Open circuit status of the ultrasonic sensor NO/YES NO: No sensor open circuit
      YES: Sensor open circuit      		 RoB X20C7 is output if YES
      Ultrasonic Sensor (Front Left Corner) Temporarily Unavailable - Freeze/Dirt Frozen/dirty status of the ultrasonic sensor NO/YES NO: Sensor not frozen/dirty
      YES: Sensor frozen/dirty      		 RoB X20C7 is output if YES
      Ultrasonic Sensor (Front Left Corner) Temporarily Unavailable - Foreign Material Fixing Foreign matter stuck status of the ultrasonic sensor NO/YES NO: Foreign matter not stuck on sensor
      YES: Foreign matter stuck on sensor      		 RoB X20C7 is output if YES
      Ultrasonic Sensor (Front Left Corner) Temporarily Unavailable - Parameter Malfunction Parameter malfunction status of the ultrasonic sensor NO/YES NO: No sensor parameter malfunction
      YES: Sensor parameter malfunction      		 RoB X20C7 is output if YES
      Ultrasonic Sensor (Front Left Corner) Temporarily Unavailable - Flowing Water Continuously Continuous running water status of the ultrasonic sensor NO/YES NO: No sensor continuous running water
      YES: Sensor continuous running water      		 RoB X20C7 is output if YES
      Ultrasonic Sensor (Rear Right Center) Temporarily Unavailable - Circuit Open Open circuit status of the ultrasonic sensor NO/YES NO: No sensor open circuit
      YES: Sensor open circuit      		 RoB X20C8 is output if YES
      Ultrasonic Sensor (Rear Right Center) Temporarily Unavailable - Freeze/Dirt Frozen/dirty status of the ultrasonic sensor NO/YES NO: Sensor not frozen/dirty
      YES: Sensor frozen/dirty      		 RoB X20C8 is output if YES
      Ultrasonic Sensor (Rear Right Center) Temporarily Unavailable - Foreign Material Fixing Foreign matter stuck status of the ultrasonic sensor NO/YES NO: Foreign matter not stuck on sensor
      YES: Foreign matter stuck on sensor      		 RoB X20C8 is output if YES
      Ultrasonic Sensor (Rear Right Center) Temporarily Unavailable - Foreign Material Fixing (Curl Up) Foreign matter stuck (curl up) status of the ultrasonic sensor NO/YES NO: Foreign matter not stuck (curl up) on sensor
      YES: Foreign matter stuck (curl up) on sensor      		 RoB X20C8 is output if YES
      Ultrasonic Sensor (Rear Right Center) Temporarily Unavailable - Parameter Malfunction Parameter malfunction status of the ultrasonic sensor NO/YES NO: No sensor parameter malfunction
      YES: Sensor parameter malfunction      		 RoB X20C8 is output if YES
      Ultrasonic Sensor (Rear Right Center) Temporarily Unavailable - Flowing Water Continuously Continuous running water status of the ultrasonic sensor NO/YES NO: No sensor continuous running water
      YES: Sensor continuous running water      		 RoB X20C8 is output if YES
      Ultrasonic Sensor (Rear Left Center) Temporarily Unavailable - Circuit Open Open circuit status of the ultrasonic sensor NO/YES NO: No sensor open circuit
      YES: Sensor open circuit      		 RoB X20C9 is output if YES
      Ultrasonic Sensor (Rear Left Center) Temporarily Unavailable - Freeze/Dirt Frozen/dirty status of the ultrasonic sensor NO/YES NO: Sensor not frozen/dirty
      YES: Sensor frozen/dirty      		 RoB X20C9 is output if YES
      Ultrasonic Sensor (Rear Left Center) Temporarily Unavailable - Foreign Material Fixing Foreign matter stuck status of the ultrasonic sensor NO/YES NO: Foreign matter not stuck on sensor
      YES: Foreign matter stuck on sensor      		 RoB X20C9 is output if YES
      Ultrasonic Sensor (Rear Left Center) Temporarily Unavailable - Foreign Material Fixing (Curl Up) Foreign matter stuck (curl up) status of the ultrasonic sensor NO/YES NO: Foreign matter not stuck (curl up) on sensor
      YES: Foreign matter stuck (curl up) on sensor      		 RoB X20C9 is output if YES
      Ultrasonic Sensor (Rear Left Center) Temporarily Unavailable - Parameter Malfunction Parameter malfunction status of the ultrasonic sensor NO/YES NO: No sensor parameter malfunction
      YES: Sensor parameter malfunction      		 RoB X20C9 is output if YES
      Ultrasonic Sensor (Rear Left Center) Temporarily Unavailable - Flowing Water Continuously Continuous running water status of the ultrasonic sensor NO/YES NO: No sensor continuous running water
      YES: Sensor continuous running water      		 RoB X20C9 is output if YES
      Ultrasonic Sensor (Rear Right Corner) Temporarily Unavailable - Circuit Open Open circuit status of the ultrasonic sensor NO/YES NO: No sensor open circuit
      YES: Sensor open circuit      		 RoB X20CA is output if YES
      Ultrasonic Sensor (Rear Right Corner) Temporarily Unavailable - Freeze/Dirt Frozen/dirty status of the ultrasonic sensor NO/YES NO: Sensor not frozen/dirty
      YES: Sensor frozen/dirty      		 RoB X20CA is output if YES
      Ultrasonic Sensor (Rear Right Corner) Temporarily Unavailable - Foreign Material Fixing Foreign matter stuck status of the ultrasonic sensor NO/YES NO: Foreign matter not stuck on sensor
      YES: Foreign matter stuck on sensor      		 RoB X20CA is output if YES
      Ultrasonic Sensor (Rear Right Corner) Temporarily Unavailable - Foreign Material Fixing (Curl Up) Foreign matter stuck (curl up) status of the ultrasonic sensor NO/YES NO: Foreign matter not stuck (curl up) on sensor
      YES: Foreign matter stuck (curl up) on sensor      		 RoB X20CA is output if YES
      Ultrasonic Sensor (Rear Right Corner) Temporarily Unavailable - Parameter Malfunction Parameter malfunction status of the ultrasonic sensor NO/YES NO: No sensor parameter malfunction
      YES: Sensor parameter malfunction      		 RoB X20CA is output if YES
      Ultrasonic Sensor (Rear Right Corner) Temporarily Unavailable - Flowing Water Continuously Continuous running water status of the ultrasonic sensor NO/YES NO: No sensor continuous running water
      YES: Sensor continuous running water      		 RoB X20CA is output if YES
      Ultrasonic Sensor (Rear Left Corner) Temporarily Unavailable - Circuit Open Open circuit status of the ultrasonic sensor NO/YES NO: No sensor open circuit
      YES: Sensor open circuit      		 RoB X20CB is output if YES
      Ultrasonic Sensor (Rear Left Corner) Temporarily Unavailable - Freeze/Dirt Frozen/dirty status of the ultrasonic sensor NO/YES NO: Sensor not frozen/dirty
      YES: Sensor frozen/dirty      		 RoB X20CB is output if YES
      Ultrasonic Sensor (Rear Left Corner) Temporarily Unavailable - Foreign Material Fixing Foreign matter stuck status of the ultrasonic sensor NO/YES NO: Foreign matter not stuck on sensor
      YES: Foreign matter stuck on sensor      		 RoB X20CB is output if YES
      Ultrasonic Sensor (Rear Left Corner) Temporarily Unavailable - Foreign Material Fixing (Curl Up) Foreign matter stuck (curl up) status of the ultrasonic sensor NO/YES NO: Foreign matter not stuck (curl up) on sensor
      YES: Foreign matter stuck (curl up) on sensor      		 RoB X20CB is output if YES
      Ultrasonic Sensor (Rear Left Corner) Temporarily Unavailable - Parameter Malfunction Parameter malfunction status of the ultrasonic sensor NO/YES NO: No sensor parameter malfunction
      YES: Sensor parameter malfunction      		 RoB X20CB is output if YES
      Ultrasonic Sensor (Rear Left Corner) Temporarily Unavailable - Flowing Water Continuously Continuous running water status of the ultrasonic sensor NO/YES NO: No sensor continuous running water
      YES: Sensor continuous running water      		 RoB X20CB is output if YES

      Body Electrical > Clearance Warning > Data List 

      Tester Display
      Ultrasonic Sensor (Front Right Center) Temporarily Unavailable - Circuit Open
      Ultrasonic Sensor (Front Right Center) Temporarily Unavailable - Freeze/Dirt
      Ultrasonic Sensor (Front Right Center) Temporarily Unavailable - Foreign Material Fixing
      Ultrasonic Sensor (Front Right Center) Temporarily Unavailable - Parameter Malfunction
      Ultrasonic Sensor (Front Right Center) Temporarily Unavailable - Flowing Water Continuously
      Ultrasonic Sensor (Front Left Center) Temporarily Unavailable - Circuit Open
      Ultrasonic Sensor (Front Left Center) Temporarily Unavailable - Freeze/Dirt
      Ultrasonic Sensor (Front Left Center) Temporarily Unavailable - Foreign Material Fixing
      Ultrasonic Sensor (Front Left Center) Temporarily Unavailable - Parameter Malfunction
      Ultrasonic Sensor (Front Left Center) Temporarily Unavailable - Flowing Water Continuously
      Ultrasonic Sensor (Front Right Corner) Temporarily Unavailable - Circuit Open
      Ultrasonic Sensor (Front Right Corner) Temporarily Unavailable - Freeze/Dirt
      Ultrasonic Sensor (Front Right Corner) Temporarily Unavailable - Foreign Material Fixing
      Ultrasonic Sensor (Front Right Corner) Temporarily Unavailable - Parameter Malfunction
      Ultrasonic Sensor (Front Right Corner) Temporarily Unavailable - Flowing Water Continuously
      Ultrasonic Sensor (Front Left Corner) Temporarily Unavailable - Circuit Open
      Ultrasonic Sensor (Front Left Corner) Temporarily Unavailable - Freeze/Dirt
      Ultrasonic Sensor (Front Left Corner) Temporarily Unavailable - Foreign Material Fixing
      Ultrasonic Sensor (Front Left Corner) Temporarily Unavailable - Parameter Malfunction
      Ultrasonic Sensor (Front Left Corner) Temporarily Unavailable - Flowing Water Continuously
      Ultrasonic Sensor (Rear Right Center) Temporarily Unavailable - Circuit Open
      Ultrasonic Sensor (Rear Right Center) Temporarily Unavailable - Freeze/Dirt
      Ultrasonic Sensor (Rear Right Center) Temporarily Unavailable - Foreign Material Fixing
      Ultrasonic Sensor (Rear Right Center) Temporarily Unavailable - Foreign Material Fixing (Curl Up)
      Ultrasonic Sensor (Rear Right Center) Temporarily Unavailable - Parameter Malfunction
      Ultrasonic Sensor (Rear Right Center) Temporarily Unavailable - Flowing Water Continuously
      Ultrasonic Sensor (Rear Left Center) Temporarily Unavailable - Circuit Open
      Ultrasonic Sensor (Rear Left Center) Temporarily Unavailable - Freeze/Dirt
      Ultrasonic Sensor (Rear Left Center) Temporarily Unavailable - Foreign Material Fixing
      Ultrasonic Sensor (Rear Left Center) Temporarily Unavailable - Foreign Material Fixing (Curl Up)
      Ultrasonic Sensor (Rear Left Center) Temporarily Unavailable - Parameter Malfunction
      Ultrasonic Sensor (Rear Left Center) Temporarily Unavailable - Flowing Water Continuously
      Ultrasonic Sensor (Rear Right Corner) Temporarily Unavailable - Circuit Open
      Ultrasonic Sensor (Rear Right Corner) Temporarily Unavailable - Freeze/Dirt
      Ultrasonic Sensor (Rear Right Corner) Temporarily Unavailable - Foreign Material Fixing
      Ultrasonic Sensor (Rear Right Corner) Temporarily Unavailable - Foreign Material Fixing (Curl Up)
      Ultrasonic Sensor (Rear Right Corner) Temporarily Unavailable - Parameter Malfunction
      Ultrasonic Sensor (Rear Right Corner) Temporarily Unavailable - Flowing Water Continuously
      Ultrasonic Sensor (Rear Left Corner) Temporarily Unavailable - Circuit Open
      Ultrasonic Sensor (Rear Left Corner) Temporarily Unavailable - Freeze/Dirt
      Ultrasonic Sensor (Rear Left Corner) Temporarily Unavailable - Foreign Material Fixing
      Ultrasonic Sensor (Rear Left Corner) Temporarily Unavailable - Foreign Material Fixing (Curl Up)
      Ultrasonic Sensor (Rear Left Corner) Temporarily Unavailable - Parameter Malfunction
      Ultrasonic Sensor (Rear Left Corner) Temporarily Unavailable - Flowing Water Continuously

      Result

      Result Proceed to
      Sensor frozen history displays "YES" A
      Sensor frozen history displays "NO" B

    Result: 

    B 

    See step  3

    Result: 

    A 

    See step  2

  2. CLEAN ULTRASONIC SENSORS 
    1. Clean the ultrasonic sensor from dirty or frozen.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    END 

  3. CHECK FOR DTC 
    1. According to the display on the GTS, check for DTCs.

      Body Electrical > Clearance Warning > Trouble Codes 

    2. According to the display on the GTS, clear the DTCs.

      Body Electrical > Clearance Warning > Clear DTCs 

    3. Recheck for DTCs

      Body Electrical > Clearance Warning > Trouble Codes 

      Result

      Result Proceed to
      DTCs are not output A
      DTC is output (for Front) B
      DTC is output (for Rear) C

    Result: 

    A 

    REPLACE CLEARANCE WARNING ECU ASSEMBLY. Refer to  REMOVAL [09/2022 - ] 

    Result: 

    B 

    REPLACE ULTRASONIC SENSOR (for Front). Refer to  REMOVAL [09/2022 - ] 

    Result: 

    C 

    REPLACE ULTRASONIC SENSOR (for Rear). Refer to  REMOVAL [09/2022 - ] 

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