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 cruise control system is operating, the cruise control system control of vehicle speed is not canceled and approximately 0.4 seconds have elapsed after cruise cancel signal (STP signal) is input to the hybrid vehicle control ECU. Hybrid vehicle control ECU
P057549 Cruise Control Internal Electronic Failure When the power switch is on (IG), STP signals input to the hybrid vehicle control ECU supervisory CPU and that input to 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 (DTC P057504 AND P057549)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Clear the DTCs.

      Click here


      Powertrain > Cruise Control > Clear DTCs

    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 system operation is possible.

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

      3. Push the cruise control main switch to -SET to begin control of vehicle speed using the cruise control system.

    5. 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