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 receives information about the area in front of the vehicle from the millimeter wave radar sensor and then sends brake control demand signals (deceleration demand) and diagnosis signals, such as signal indicating the millimeter wave radar sensor assembly is dirty or malfunctioning, to the ECM.

DTC Code DTC Detection Condition Trouble Area
P1615 While the vehicle speed is 50 km/h (31 mph) or more with the cruise control switch on, communication data from the driving support ECU is logically inconsistent for 1 second.

  • Driving support ECU

  • ECM

INSPECTION PROCEDURE

Note

When the driving support ECU or ECM is replaced with a new one, initialization must be performed Click here.

PROCEDURE


  1. CONFIRM DESIGNATION INFORMATION


    1. Confirm the designation information.


      1. Turn the ignition switch to ON.

      2. Turn the cruise control switch on.

      3. With the brake pedal depressed, push the cruise control switch to +RES 3 times within 3 seconds. Check that the skid control buzzer sounds at this time.

        OK
        The skid control buzzer sounds (initialization is performed).

        Note


        • Do not turn the light control switch on at this time as doing so causes the beam axis to deviate. If the light control switch is turned on by mistake, readjust the beam axis Click here.

        • If initialization cannot be performed, first inspect the stop light switch circuit, cruise control switch circuit and skid control buzzer circuit.

      4. Turn the ignition switch off.


    NEXT

  2. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Perform the following to make sure the DTC detection conditions are met.

      Tech Tips

      If the detection conditions are not met, the system cannot detect the malfunction.


      1. Drive the vehicle at a speed of 50 km/h (31 mph) or more.

      2. Turn the cruise control switch on.

    3. Check for DTCs Click here.

      OK
      DTC P1615 is not output.

    NG

    REPLACE DRIVING SUPPORT ECU Click here

    OK

    END

  3. REPLACE DRIVING SUPPORT ECU


    1. Replace the driving support ECU Click here.


    NEXT

  4. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Perform the following to make sure the DTC detection conditions are met.

      Tech Tips

      If the detection conditions are not met, the system cannot detect the malfunction.


      1. Drive the vehicle at a speed of 50 km/h (31 mph) or more.

      2. Turn the cruise control switch on.

    3. Check for DTCs Click here.

      OK
      DTC P1615 is not output.
      Result
      Result Proceed to
      OK A
      NG (for 1GR-FE) B
      NG (for 1KD-FTV) C

    B

    REPLACE ECM Click here

    C

    REPLACE ECM Click here

    A

    END (DRIVING SUPPORT ECU IS DEFECTIVE)