CRUISE CONTROL SYSTEM, Diagnostic DTC:P1578

DTC Code DTC Name
P1578 Brake System Malfunction

DESCRIPTION

This DTC is stored when the electronically controlled brake system has a problem. Check the electronically controlled brake system when DTC P1578 is output.

DTC No. Detection Item DTC Detection Condition Trouble Area
P1578 Brake System Malfunction A malfunction in the electronically controlled brake system is detected for 0.2 seconds or more.

  • Electronically controlled brake system

  • Hybrid vehicle control ECU assembly

CAUTION / NOTICE / HINT

Note

This DTC may be output by the electronically controlled brake system at the same time. In that case, perform troubleshooting for the electronically controlled brake system first.

PROCEDURE


  1. CHECK FOR DTCs (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)


    1. Check for DTCs.

      Click here


      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      Electronically controlled brake system DTCs are not output A
      Electronically controlled brake system DTCs are output B

    B

    GO TO ELECTRONICALLY CONTROLLED BRAKE 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 using 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 HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here