CRUISE CONTROL SYSTEM(for 2GR-FSE), Diagnostic DTC:P1578

DTC Code DTC Name
P1578 Brake System Malfunction

DESCRIPTION

This DTC is stored when the vehicle stability control system is malfunctioning. Inspect the vehicle stability control system when this DTC is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
P1578 Brake System Malfunction The ECM receives a brake system error signal for approximately 0.2 seconds or more while the cruise control is operating.

  • Vehicle stability control system

  • ECM

CAUTION / NOTICE / HINT

Note

This DTC may be stored by the vehicle stability control system at the same time. In that case, troubleshoot the vehicle stability control system first.

PROCEDURE


  1. CHECK FOR DTCs (VEHICLE STABILITY CONTROL SYSTEM)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.

    5. Check for DTCs.

      Click here


      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      Vehicle stability control system DTCs are not output A
      Vehicle stability control system DTCs are output B

    B

    GO TO VEHICLE STABILITY CONTROL SYSTEM Click here

    A

  2. CHECK FOR DTCs (CRUISE CONTROL SYSTEM)


    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 cruise control operation is possible.

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

      3. Push the cruise control switch to -/SET to begin control of vehicle speed by the cruise control system.

    3. Check for DTCs.

      Click here


      Powertrain > Cruise Control > Trouble Codes
      Result
      Result Proceed to
      DTC P1578 is not output A
      DTC P1578 is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE ECM Click here