CRUISE CONTROL SYSTEM, Diagnostic DTC:P1578

DTC Code DTC Name
P1578 Brake System

DESCRIPTION

This DTC is stored when a malfunction is detected in the electronically controlled brake system. Check the electronically controlled brake system when DTC P1578 is stored.

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

  • Electronically controlled brake system

  • ECM

CAUTION / NOTICE / HINT

Note

First check the CAN communication system by following How to Proceed with Troubleshooting. After checking that there are no malfunctions in the CAN communication system, proceed with troubleshooting

Click here

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. Make sure that the DTC detection conditions are met.

      Tech Tips

      If the detection conditions are not met, the system cannot detect the malfunction.

    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