DYNAMIC RADAR CRUISE CONTROL SYSTEM, 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.

Detection Item

DTC Detection Condition

Trouble Area

P1578

Brake System

  • When the dynamic radar cruise control system is operating, the ECM receives a brake system error signal for 0.2 seconds or more.

  • When the ECM detects a malfunction in the brake system and CAN communication from the ECM to the brake system is stopped.

  • VSC system

  • Skid control ECU (brake actuator assembly)

  • ECM

CAUTION / NOTICE / HINT

Tip:

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 ignition switch to ON.

    3. Turn the GTS on.

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

    5. Check for DTCs.

      Click here

      Chassis > ABS/VSC/TRC > Trouble Codes

      Result

      Result

      Proceed to

      DTC is not output

      A

      DTC is output

      B
    B

    GO TO VEHICLE STABILITY CONTROL SYSTEM

    Click here

    A

  2. CHECK FOR DTCs

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

      Tip:

      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 cruise control system on using the cruise control switch (ON/OFF).

      3. Depress the brake pedal for 0.4 seconds or more.

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

    6. Check for DTCs.

      1. for 2AD-FHV, 2AD-FTV:

        Powertrain > Radar Cruise1 > Trouble Codes

      2. for 2AR-FE, 3ZR-FE, 3ZR-FAE:

        Powertrain > Radar Cruise1 > Trouble Codes

      3. for 2WW:

        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 hereClick here

    B

  3. REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

    1. Replace the skid control ECU (brake actuator assembly).

      Click hereClick here

    Result

    Proceed to

    NEXT
    NEXT

  4. CHECK FOR DTCs

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.

      Click here

      1. for 2AD-FHV, 2AD-FTV:

        Powertrain > Radar Cruise1 > Clear DTCs

      2. for 2AR-FE, 3ZR-FE, 3ZR-FAE:

        Powertrain > Radar Cruise1 > Clear DTCs

      3. for 2WW:

        Powertrain > Cruise Control > Clear DTCs

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

      Tip:

      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 cruise control system on using the cruise control switch (ON/OFF).

      3. Depress the brake pedal for 0.4 seconds or more.

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

    7. Check for DTCs.

      Click here

      1. for 2AD-FHV, 2AD-FTV:

        Powertrain > Radar Cruise1 > Trouble Codes

      2. for 2AR-FE, 3ZR-FE, 3ZR-FAE:

        Powertrain > Radar Cruise1 > Trouble Codes

      3. for 2WW:

        Powertrain > Cruise Control > Trouble Codes

    Result

    Result

    Proceed to

    DTC P1578 is not output

    A

    DTC P1578 is output

    B
    A

    END

    B

    REPLACE ECM

    for 2AD-FHV:Click here

    for 2AD-FTV:Click here

    for 2AR-FE:Click here

    for 3ZR-FAE:Click here

    for 3ZR-FE:Click here

    for 2WW:Click here