VEHICLE STABILITY CONTROL SYSTEM TC and CG Terminal Circuit

DESCRIPTION

Connecting terminals TC and CG of the DLC3 causes the ECU to display the DTC by blinking the ABS warning and slip indicator lights.

WIRING DIAGRAM

A01HYDAE21

INSPECTION PROCEDURE

Tech Tips

When the indicator lights continue to blink, a ground short in the wiring of terminal TC of the DLC3 or an internal ground short in one or more ECUs is suspected.

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if a CAN communication system DTC is output Click here.

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

    B

    INSPECT CAN COMMUNICATION SYSTEM Click here

    A

  2. INSPECT DLC3


    1. A01HXKWE27
      Text in Illustration
      *a Front view of DLC3

      Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      I39-13 (TC) - I39-4 (CG) Ignition switch ON 11 to 14 V

    NG

    CHECK HARNESS AND CONNECTOR (TC of DLC3 - ECM) Click here

    OK

  3. REPLACE ECM


    1. A01HXKWE27
      Text in Illustration
      *a Front view of DLC3

      Turn the ignition switch off.

    2. Replace the ECM Click here for 2GR-FE, or Click here for 2AR-FE).

    3. Using SST, connect terminals TC and CG of the DLC3.

      SST
      09843-18040

    4. Check that the ABS warning and slip indicator lights are blinking.

      OK
      The ABS warning and slip indicator lights are blinking.

      Tech Tips

      If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing parts Click here.


    NG

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    OK

    END

  4. CHECK HARNESS AND CONNECTOR (TC of DLC3 - ECM)


    1. Turn the ignition switch off.

    2. Disconnect the ECM connector.

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

      Standard Resistance
      for 2GR-FE
      Tester Connection Condition Specified Condition
      I39-13 (TC) - A25-45 (TC) Always Below 1 Ω
      I39-13 (TC) - Body ground Always 10 kΩ or higher
      for 2AR-FE
      Tester Connection Condition Specified Condition
      I39-13 (TC) - A25-23 (TC) Always Below 1 Ω
      I39-13 (TC) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (CG of DLC3 - BODY GROUND)


    1. A01HXKWE18
      Text in Illustration
      *a Front view of DLC3

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I39-4 (CG) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. REPLACE ECM


    1. A01HXKWE27
      Text in Illustration
      *a Front view of DLC3

      Replace the ECM Click here for 2GR-FE, or Click here for 2AR-FE).

    2. Using SST, connect terminals TC and CG of the DLC3.

      SST
      09843-18040

    3. Check that the ABS warning and slip indicator lights are blinking.

      OK
      The ABS warning and slip indicator lights are blinking.

      Tech Tips

      If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing parts Click here.


    NG

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    OK

    END