VEHICLE STABILITY CONTROL SYSTEM AUTO LSD Indicator Light Remains ON

DTC Code DTC Name
AUTO LSD Indicator Light Remains ON

DESCRIPTION

The AUTO LSD is a system for 2WD vehicles. When the VSC OFF switch (telltale light assembly) is pushed on, the AUTO LSD function is available and the AUTO LSD indicator light illuminates.

Tip:

The AUTO LSD does not operate even if the VSC OFF switch (telltale light assembly) is pressed under the following conditions:

  • The TRC/TRAC or VSC system is faulty.

  • The temperature inside the brake actuator assembly increases and the AUTO LSD operation is suspended.

WIRING DIAGRAM

C342523E08

CAUTION / NOTICE / HINT

Note:

When replacing the skid control ECU (brake actuator assembly), perform zero point calibration.

Click here

PROCEDURE

  1. CHECK IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED

    1. Check if the skid control ECU (brake actuator assembly) connector is securely connected.

      OK

      The connector is securely connected.

    Result

    Proceed to

    OK

    NG
    NG

    CONNECT CONNECTOR TO ECU CORRECTLY

    OK

  2. CHECK CAN COMMUNICATION SYSTEM

    1. Check if CAN communication system DTCs are output.

      for LHD with Central Gateway ECU:Click here

      for RHD with Central Gateway ECU:Click hereClick here

      for LHD without Central Gateway ECU:Click here

      for RHD without Central Gateway ECU:Click here

    Result

    Proceed to

    DTC is not output

    DTC is output (for LHD with Central Gateway ECU)

    DTC is output (for RHD with Central Gateway ECU)

    DTC is output (for LHD without Central Gateway ECU)

    DTC is output (for RHD without Central Gateway ECU)
    DTC is output (for LHD with Central Gateway ECU)

    CHECK CAN COMMUNICATION SYSTEM

    Click here

    DTC is output (for RHD with Central Gateway ECU)

    CHECK CAN COMMUNICATION SYSTEM

    Click here

    DTC is output (for LHD without Central Gateway ECU)

    CHECK CAN COMMUNICATION SYSTEM

    Click here

    DTC is output (for RHD without Central Gateway ECU)

    CHECK CAN COMMUNICATION SYSTEM

    Click here

    DTC is not output

  3. CHECK HARNESS AND CONNECTOR (CSW TERMINAL)

    1. Turn the ignition switch off.

    2. Disconnect the A100 skid control ECU (brake actuator assembly) connector.

    3. C365682C07

      *a

      Front view of wire harness connector

      (to Skid Control ECU [Brake Actuator Assembly])

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      A100-33 (CSW) - Body ground

      VSC OFF switch (telltale light assembly) held on

      Below 1 Ω

      VSC OFF switch (telltale light assembly) off (Not pressed)

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    INSPECT TELLTALE LIGHT ASSEMBLYClick here

    OK

  4. READ VALUE USING GTS (AUTO LSD INDICATOR LIGHT)

    1. Reconnect the A100 skid control ECU (brake actuator assembly) connector.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the GTS on.

    5. Enter the following menus: Chassis / ABS/VSC/TRC / Data List.

    6. According to the display on the GTS, read the Data List.

    7. Check the GTS display condition of the AUTO LSD indicator light.

    Chassis > ABS/VSC/TRC > Data List

    Tester Display

    Measurement Item

    Range

    Normal Condition

    Diagnostic Note

    Auto LSD Indicator Light

    AUTO LSD indicator light

    ON or OFF

    OFF: AUTO LSD indicator light off

    ON: AUTO LSD indicator light on

    for 2WD

    Chassis > ABS/VSC/TRC > Data List

    Tester Display

    Auto LSD Indicator Light

    Result

    Proceed to

    Display of the Data List remains OFF

    Display of the Data List remains ON
    Display of the Data List remains OFF

    INSPECT METER / GAUGE SYSTEM

    Click here

    Display of the Data List remains ON

    REPLACE BRAKE ACTUATOR ASSEMBLY

    Click here

  5. INSPECT TELLTALE LIGHT ASSEMBLY

    1. Remove the VSC OFF switch (telltale light assembly).

      Click here

    2. Inspect the VSC OFF switch (telltale light assembly).

      Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE TELLTALE LIGHT ASSEMBLY

    Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - TELLTALE LIGHT ASSEMBLY)

    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A100-33 (CSW) - G43-6 (+)

      Always

      Below 1 Ω

      G43-13 (E) - Body ground

      Always

      Below 1 Ω

      A100-33 (CSW) or G43-6 (+) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    USE SIMULATION METHOD TO CHECK

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR