DYNAMIC RADAR CRUISE CONTROL SYSTEM(for 2GR-FE, 2AR-FE), Diagnostic DTC:P1578

DTC Code DTC Name
P1578 Brake System

DESCRIPTION

This DTC is output when the VSC system has a problem. Check the VSC system when this DTC is output.

DTC No. DTC Detection Condition Trouble Area
P1578 When the dynamic radar cruise control system is operating, the ECM receives a brake system error signal for 0.2 seconds or more.

  • VSC system

  • Skid control ECU (brake actuator assembly)

  • ECM

WIRING DIAGRAM

A01W5JXE01

CAUTION / NOTICE / HINT

Tech Tips

This circuit uses CAN communication. Therefore, if there are any malfunctions in the communication circuit, one or more DTCs in the CAN communication system are output.

PROCEDURE


  1. CHECK FOR DTCs (ABS/VSC/TRC)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Chassis / ABS/VSC/TRC / Trouble Codes.

    5. Check for DTCs.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

    6. Turn the engine switch off.


    B

    GO TO VEHICLE STABILITY CONTROL SYSTEM Click here

    A

  2. CHECK FOR DTCs (DTC P1578)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Make sure that the DTC detection conditions are met.

      Tech Tips

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

    5. Enter the following menus: Powertrain / Radar Cruise1 / Trouble Codes.

    6. Check for DTCs.

      Result
      Result Proceed to
      DTC is not output A
      DTC P1578 is output B

    7. Turn the engine switch off.


    A

    USE SIMULATION METHOD TO CHECK Click here

    B

  3. REPLACE BRAKE ACTUATOR ASSEMBLY

    Click here


    NEXT

  4. CHECK FOR DTCs (DTC P1578)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs Click here.

    5. Make sure that the DTC detection conditions are met.

      Tech Tips

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

    6. Enter the following menus: Powertrain / Radar Cruise1 / Trouble Codes.

    7. Check for DTCs.

      Result
      Result Proceed to
      DTC is not output A
      DTC P1578 is output (for 2GR-FE) B
      DTC P1578 is output (for 2AR-FE) C

    8. Turn the engine switch off.


    A

    END

    B

    REPLACE ECM Click here

    C

    REPLACE ECM Click here