CRUISE CONTROL SYSTEM, Diagnostic DTC:P1578

DTC Code DTC Name
P1578 Brake System Malfunction

DESCRIPTION

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

DTC Code DTC Detection Condition Trouble Area
P1578

  • The cruise control system is operating

  • There is a Electronically controlled brake system malfunction

  • Electronically controlled brake system

  • Power management control ECU

INSPECTION PROCEDURE

Note

If the power management control ECU is replaced, refer to the Service Bulletin.

PROCEDURE


  1. CHECK FOR DTC (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)


    1. Clear the DTC Click here.

    2. Recheck for DTC Click here.

      OK
      Electronically controlled brake system DTC is not output.

    NG

    GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM

    OK

  2. CHECK FOR DTC (CRUISE CONTROL SYSTEM)


    1. Clear the DTC Click here.

    2. Recheck for DTC Click here.

      OK
      DTC P1578 is not output.

    NG

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here