DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:P057504, P057549

DTC Code DTC Name
P057504 Cruise Control System Internal Failure
P057549 Cruise Control Internal Electronic Failure

DESCRIPTION

This DTC is stored when there is a malfunction in the hybrid vehicle control ECU.

DTC No. Detection Item DTC Detection Condition Trouble Area
P057504 Cruise Control System Internal Failure While the dynamic radar cruise control system is operating, the dynamic radar cruise control system control of vehicle speed is not canceled and approximately 0.4 seconds have elapsed after cruise cancel signal (STP signal) is received by the hybrid vehicle control ECU. Hybrid vehicle control ECU
P057549 Cruise Control Internal Electronic Failure When the power switch is on (IG), STP signals received by the hybrid vehicle control ECU supervisory CPU and that received by the control ECU do not match for approximately 0.2 seconds or more. Hybrid vehicle control ECU

CAUTION / NOTICE / HINT

Note

Before replacing the hybrid vehicle control ECU, refer to Service Bulletin.

Tech Tips

The hybrid vehicle control ECU receives signals from each sensor to control all functions of the cruise control system. When a malfunction is detected, the fail-safe function operates until the power switch is turned off.

PROCEDURE


  1. CHECK FOR DTCs (RADAR CRUISE 1)


    1. Clear the DTCs.

      Click here


      Powertrain > Cruise Control > Clear DTCs

    2. 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 dynamic radar cruise control operation is possible.

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

      3. Depress the brake pedal for 0.4 seconds or more.

    3. Check for DTCs.

      Click here


      Powertrain > Cruise Control > Trouble Codes
      Result
      Result Proceed to
      DTC P057504 and P057549 are not output. A
      DTC P057504 and/or P057549 are output. B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE HYBRID VEHICLE CONTROL ECU Click here