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 ECM.

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 since cruise cancel signal (STP signal) is input to the ECM. ECM
P057549 Cruise Control Internal Electronic Failure When the engine switch is on (IG), STP signals input to the ECM supervisory CPU and that input to the control ECU do not match for approximately 0.2 seconds or more. ECM

CAUTION / NOTICE / HINT

Note

Before replacing the ECM, refer to Service Bulletin.

Tech Tips

The ECM 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 engine switch is turned off.

PROCEDURE


  1. CHECK FOR DTCs


    1. Clear the DTCs.


      Powertrain > Cruise Control > Clear DTCs

    2. Perform the following procedure.

      Tech Tips

      If the following procedure is not performed, the previously output DTC cannot be detected.


      1. Drive the vehicle at a speed for which cruise control operation is possible.

      2. Turn the cruise control system on using the cruise control main switch.

      3. Depress the brake pedal for 1 second or more.

    3. Check for DTCs.


      Powertrain > Cruise Control > Trouble Codes
      OK
      DTC P057504 and P057549 are not output.
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE ECM Click here