CRUISE CONTROL SYSTEM(for 3ZR-FAE), Diagnostic DTC:P1578

DTC Code DTC Name
P1578 Brake System Malfunction

DESCRIPTION

This DTC is stored when the vehicle stability control system has a problem. Check the vehicle stability control system when DTC P1578 is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
P1578 Brake System Malfunction When the ignition switch ON and the cruise control system is operating, a malfunction in the vehicle stability control system is detected for 0.2 seconds or more.

  • Vehicle stability control system

  • ECM

  • Skid control ECU (Brake actuator assembly)

CAUTION / NOTICE / HINT

Note

Before replacing the ECM, refer to Service Bulletin.

PROCEDURE


  1. CHECK FOR DTCs (VEHICLE STABILITY CONTROL SYSTEM)


    1. Check for DTCs.

      Click here


      Chassis > ABS/VSC/TRC/EPB > Trouble Codes
      OK
      Vehicle stability control system DTCs are not output.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO VEHICLE STABILITY CONTROL SYSTEM Click here

    OK

  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 main switch (ON/OFF button).

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

    3. Check for DTCs.

      Click here


      Powertrain > Cruise Control > Trouble Codes
      OK
      DTC P1578 is not output.
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  3. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  4. 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 main switch (ON/OFF button).

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

    3. Check for DTCs.

      Click here


      Powertrain > Cruise Control > Trouble Codes
      OK
      DTC P1578 is not output.
      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here