DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:P1617

DTC Code DTC Name
P1617 Distance Control ECU Malfunction

DESCRIPTION

In the dynamic radar cruise control system, the ECM and the driving support ECU assembly communicate with one another to control the system based on some designation information. If the designation information of the ECM and driving support ECU assembly is different or the driving support ECU assembly is malfunctioning, this DTC is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
P1617 Distance Control ECU Malfunction While the dynamic radar cruise control is either preparing for operation or operating, a designation signal from the ECM and a designation signal from the driving support ECU assembly do not match for more than a certain amount of time or the driving support ECU assembly is malfunctioning, the ECM stores this DTC.

  • Driving support ECU assembly

  • ECM

INSPECTION PROCEDURE

Note


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

  • 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.

PROCEDURE


  1. REPLACE DRIVING SUPPORT ECU ASSEMBLY


    1. Replace the driving support ECU assembly Click here.


    NEXT

  2. CHECK FOR DTCS (DTC P1617)


    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
      DTCs are not output A
      DTC P1617 is output (for 2AR-FE) B
      DTC P1617 is 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)