PRE-CRASH SAFETY 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 transit the data for the general vehicle control diagnosis function along the communication line. The millimeter wave radar sensor assembly transmits information about the vehicle in front to the driving support ECU.

DTC Code DTC Detection Condition Trouble Are
U0235 When the ignition switch is ON, a communication error between the millimeter wave radar sensor assembly and driving support ECU is detected for 1 second.

  • Harness or connector

  • Millimeter wave radar sensor assembly

  • Driving support ECU

WIRING DIAGRAM

A01DOCGE03

INSPECTION PROCEDURE

Note


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

  • Confirm that the connector is securely connected, as a partially connected connector may be the cause of this DTC being output.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (DRIVING SUPPORT ECU - BATTERY AND BODY GROUND)


    1. A01DR1UE04
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Driving Support ECU)

      Disconnect the G119 ECU connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G119-30 (B) - Body ground Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G119-25 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A01DT5ZE05
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Millimeter Wave Radar Sensor Assembly)

      Disconnect the A15 sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A15-2 (SGND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (DRIVING SUPPORT ECU - MILLIMETER WAVE RADAR SENSOR)


    1. Disconnect the G119 ECU connector.

    2. Disconnect the A15 sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G119-16 (LRDD) - A15-3 (LRDD) Always Below 1 Ω
      G119-16 (LRDD) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK DRIVING SUPPORT ECU


    1. A01DQ4YE03
      Text in Illustration
      *a

      Component without harness connected

      (Driving Support ECU)

      Disconnect the A15 sensor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G119-16 (LRDD) - Body ground Ignition switch ON 4.5 to 5.5 V

    NG

    REPLACE DRIVING SUPPORT ECU Click here

    OK

  5. REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY


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


    NEXT

  6. ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY


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


    NEXT

  7. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      OK
      DTC U0235 is not output.

    NG

    REPLACE DRIVING SUPPORT ECU Click here

    OK

    END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY IS DEFECTIVE)