DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:U0235

DTC Code DTC Name
U0235 Lost Communication with Cruise Control Front Distance Range Sensor

DESCRIPTION

The millimeter wave radar sensor assembly and driving support ECU assembly transmit the data for general vehicle control and diagnosis function along the communication line. The millimeter wave radar sensor assembly transmits information about the vehicle in front to the driving support ECU assembly.

DTC No. DTC Detection Condition Trouble Area
U0235 The driving support ECU detects a communication error signal (from the millimeter wave radar sensor assembly to the driving support ECU assembly) for 1 second or more while the dynamic radar cruise control is operating

  • CAN communication system

  • Millimeter wave radar sensor assembly

  • Driving support ECU assembly

WIRING DIAGRAM

A004XVHE16

CAUTION / NOTICE / HINT

Note

When the millimeter wave radar sensor assembly is replaced with a new one, adjustment of the radar sensor beam axis must be performed Click here.

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Using the intelligent tester to check if the CAN communication system is functioning normally Click here.

      Result
      Result Proceed to
      CAN communication is normal A
      CAN communication is malfunctioning B

    B

    GO TO CAN COMMUNICATION SYSTEM

    A

  2. CHECK HARNESS AND CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY POWER SOURCE)


    1. A005096E03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Millimeter Wave Radar Sensor Assembly)

      Disconnect the millimeter wave radar sensor assembly connector.

    2. Turn the power switch on (IG).

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A2-5 (IGB) - Body ground Power switch on (IG) 11 to 14 V

    4. Reconnect the millimeter wave radar sensor assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - BODY GROUND)


    1. A004X98E03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Millimeter Wave Radar Sensor Assembly)

      Disconnect the millimeter wave radar sensor assembly connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      A2-2 (SGND) - Body ground Always Below 1 Ω

    3. Reconnect the millimeter wave radar sensor assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY


    1. Replace the millimeter wave radar sensor assembly Click here.

    2. Adjust the millimeter wave radar sensor assembly Click here.


    NEXT

  5. CHECK WHETHER DTC OUTPUT RECURS (DTC U0235)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Clear the DTCs Click here.

    4. Perform the following to make sure that the DTC detection conditions are met.

      Tech Tips

      If the detection conditions are not met, the malfunction cannot be detected.


      1. Drive the vehicle at a speed of 50 km/h (30 mph) and 170 km/h (105 mph).

      2. Turn the cruise control switch (ON-OFF button) on.

      3. Push the -/SET switch to activate the cruise control.

    5. Enter the following menus: Powertrain / Radar Cruise / DTC.

    6. Read the DTCs.

      Result
      Result Proceed to
      DTC is not output A
      DTC U0235 is output B

    A

    END

    B

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here