DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:P1615

DTC Code DTC Name
P1615 Communication Error from Distance Control ECU to ECM

DESCRIPTION

The driving support ECU assembly and ECM always communicate the data for vehicle general control and diagnosis function to each other via a communication line.

The driving support ECU assembly determines the distance, relative speed, and target deceleration speed based on the signals from the millimeter wave radar sensor assembly, and it sends a control demand signal to the ECM.

DTC No. Detection Item DTC Detection Condition Trouble Area
P1615 Communication Error from Distance Control ECU to ECM While the dynamic radar cruise control is either preparing for operation or operating, if communication data from the driving support ECU assembly is logically inconsistent for a certain amount of time, the ECM stores this DTC.

  • Driving support ECU assembly

  • ECM

INSPECTION PROCEDURE

Note


  • When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.

  • If the ECM is replaced, refer to Registration Click here.

PROCEDURE


  1. REPLACE DRIVING SUPPORT ECU ASSEMBLY


    1. Replace the driving support ECU assembly Click here.


    NEXT

  2. CHECK FOR DTCS (DTC P1615)


    1. Connect the Techstream to the DLC3.

    2. Turn the engine 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 cruise control operation is possible.

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

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

    6. Check for DTCs.

      Result
      Result Proceed to
      DTC P1615 is output A
      DTCs are not output (for 2AR-FE) B
      DTCs are not output (for 2GR-FE) C

    7. Turn the engine switch off.


    B

    REPLACE ECM Click here

    C

    REPLACE ECM Click here

    A

    END (DRIVING SUPPORT ECU ASSEMBLY WAS DEFECTIVE)