DYNAMIC RADAR 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 When the power switch is on (IG) and the dynamic radar cruise control system is operating, a malfunction in the electronically controlled brake system is detected for 0.2 seconds or more.

  • Electronically controlled brake system

  • Power management control ECU

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

      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 (RADAR CRUISE 1)


    1. Clear the DTCs.

      Click here

    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 dynamic radar cruise control operation is possible.

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

      3. Drive the vehicle at 36 km/h (22 mph) or more for 0.2 seconds or more.

    3. Check for DTCs.

      Click here

      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 POWER MANAGEMENT CONTROL ECU Click here