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DTC U0235-87: Lost Communication with Cruise Control Front Distance Range Sensor Missing Message [05/2019 - ]: Procedure

  1. CHECK FOR DTC 
    1. Read each DTC and check the diagnosis pattern using the table below.

      Front Radar Sensor: Refer to DTC CHECK / CLEAR [05/2019 - ]

      Pre-Collision System: Refer to DTC CHECK / CLEAR [05/2019 - ]

      Body Electrical > Front Radar Sensor > Trouble Codes 

      Body Electrical > Pre-Collision System > Trouble Codes 

      Pattern Display on GTS / Output DTC
      Millimeter Wave Radar Sensor Assembly
      (Front Radar Sensor)      		 Forward Recognition Camera
      (Pre-Collision System)
      Pattern 1 U010487 U023587
      Pattern 2 U010487 -

      Result

      Result Proceed to
      Pattern 1 A
      Pattern 2 B

    Result: 

    B 

    REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY. Refer to  REMOVAL [05/2019 - ] 

    Result: 

    A 

    See step  2

  2. CHECK CAN MAIN WIRE (MILLIMETER WAVE RADAR SENSOR ASSEMBLY CAN MAIN WIRE) 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Disconnect the B13 millimeter wave radar sensor assembly connector.
      GTY956750Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Millimeter Wave Radar Sensor Assembly)      		 *b DLC3
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B13-5 (CA1P) - B13-6 (CA1N) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      B13-5 (CA1P) - I168-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      B13-6 (CA1N) - I168-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      B13-5 (CA1P) - I168-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      B13-6 (CA1N) - I168-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  4

    Result: 

    OK 

    See step  3

  3. CHECK MILLIMETER WAVE RADAR SENSOR ASSEMBLY 
    1. Replace the millimeter wave radar sensor assembly.

      Refer to REMOVAL [05/2019 - ]

    2. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [05/2019 - ]

      Body Electrical > Front Radar Sensor > Clear DTCs 

    3. Make sure that the DTC detection conditions are met.

      HINT: 

      If the detection conditions are not met, the system cannot detect the malfunction.

    4. Recheck for DTCs and check that no DTCs are output.

      Refer to DTC CHECK / CLEAR [05/2019 - ]

      Body Electrical > Front Radar Sensor > Trouble Codes 

      OK

      DTC U010487 is not output.

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE) 

    Result: 

    NG 

    REPLACE FORWARD RECOGNITION CAMERA. Refer to  REMOVAL [05/2019 - ] 

  4. CHECK CAN MAIN WIRE (FORWARD RECOGNITION CAMERA CAN MAIN WIRE) 
    1. Reconnect the B13 millimeter wave radar sensor assembly connector.
    2. Disconnect the T17 forward recognition camera connector.
      GTY956627Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Forward Recognition Camera)      		 *b DLC3
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      T17-6 (CANH) - T17-12 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      T17-6 (CANH) - I168-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      T17-12 (CANL) - I168-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      T17-6 (CANH) - I168-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      T17-12 (CANL) - I168-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR 

    Result: 

    OK 

    See step  5

  5. CHECK MILLIMETER WAVE RADAR SENSOR ASSEMBLY 
    1. Replace the millimeter wave radar sensor assembly.

      Refer to REMOVAL [05/2019 - ]

    2. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [05/2019 - ]

      Body Electrical > Front Radar Sensor > Clear DTCs 

    3. Make sure that the DTC detection conditions are met.

      HINT: 

      If the detection conditions are not met, the system cannot detect the malfunction.

    4. Recheck for DTCs and check that no DTCs are output.

      Refer to DTC CHECK / CLEAR [05/2019 - ]

      Body Electrical > Front Radar Sensor > Trouble Codes 

      OK

      DTC U010487 is not output.

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE) 

    Result: 

    NG 

    REPLACE FORWARD RECOGNITION CAMERA. Refer to  REMOVAL [05/2019 - ] 

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