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

DTC No. DTC Detection Condition Trouble Area
U0235 The ECM detects a communication error signal (from the millimeter wave radar sensor to the distance control ECU) for 0.15 sec. or more while the dynamic radar cruise control is in operation

  • Communication circuit

  • Millimeter wave radar sensor

  • Distance control ECU

WIRING DIAGRAM

A01604FE01

INSPECTION PROCEDURE

Note


  • When the distance control ECU is replaced with a new one, initialization must be performed Click here.

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

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (DISTANCE CONTROL ECU - MILLIMETER WAVE RADAR SENSOR)


    1. A01639UE01

      Disconnect the distance control ECU and millimeter wave radar sensor connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J17-22 (LRDD) - B9-3 (LRDD) Always Below 1 Ω
      J17-13 (IGB) - B9-5 (IGB) Always Below 1 Ω
      J17-22 (LRDD) - Body ground Always 10 kΩ or higher
      J17-13 (IGB) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK DISTANCE CONTROL ECU


    1. A0162YHE01

      Reconnect the distance control ECU connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      J17-13 (IGB) - J17-10 (SGND) Engine switch on (IG) 11 to 14 V
      J17-22 (LRDD) - J17-10 (SGND) Engine switch on (IG) 4.5 to 5.5 V

    NG

    REPLACE DISTANCE CONTROL ECU Click here

    OK

  3. REPLACE MILLIMETER WAVE RADAR SENSOR


    1. Replace the millimeter wave radar sensor Click here.

    2. Adjust the millimeter wave radar sensor Click here.


    NEXT

  4. CHECK DTC


    1. Clear the DTC Click here.

    2. Turn the cruise control main switch on.

    3. Drive the vehicle at a speed for which cruise control operation is possible.

    4. Check if the same DTC is recorded Click here.

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

    B

    REPLACE DISTANCE CONTROL ECU Click here

    A

    END