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 data for general vehicle control and diagnosis functions using communication lines. 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 ECM 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

  • Millimeter wave radar sensor circuit

  • Millimeter wave radar sensor assembly

  • Driving support ECU assembly

WIRING DIAGRAM

A0042VTE03

INSPECTION PROCEDURE

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.

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Using the GTS 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 Click here

    A

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


    1. A0040TCE46
      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 Condition Specified Condition
      A2-5 (IGB) - Body ground Power switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - IG1 RELAY)

    OK

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


    1. A0040TCE47
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Millimeter Wave Radar Sensor Assembly)

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

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - BODY GROUND)

    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 FOR DTCs (DTC U0235)


    1. Connect the GTS 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 for which radar cruise control operation is possible.

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

      3. Push the cruise control switch to -/SET to begin control of vehicle speed using the cruise control system.

    5. Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.

    6. Check for DTCs.

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

    B

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here

    A

    END