VEHICLE STABILITY CONTROL SYSTEM TC and CG Terminal Circuit

DESCRIPTION

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

WIRING DIAGRAM

B008KVRE02
*a Skid Control ECU (Brake Actuator Assembly)
*b CAN Communication Line

CAUTION / NOTICE / HINT

Note

When replacing the skid control ECU (brake actuator assembly), perform system variant learning.

Click here

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 CAN communication system DTCs are output.

      Click here

      Result
      Result Proceed to
      DTCs are not output. A
      DTCs are output. B

    B

    INSPECT CAN COMMUNICATION SYSTEM Click here

    A

  2. INSPECT DLC3


    1. Turn the ignition switch to ON.

    2. B008K5PC01
      *a Front view of DLC3

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F41-13 (TC) - F41-4 (CG) Ignition switch ON 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

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

    OK

  3. REPLACE ECM

    B008K5PC01
    *a Front view of DLC3

    1. Turn the ignition switch off.

    2. Replace the ECM.

      for 8NR-FTS: Click here

      for 3ZR-FAE: Click here

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

      SST
      09843-18040

    4. Check that the ABS warning, slip indicator and brake hold standby indicator lights are blinking.

      OK
      The ABS warning, slip indicator and brake hold standby 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

      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    A

    END

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    C

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

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


    1. Turn the ignition switch off.

    2. Disconnect the A38 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F41-13 (TC) - A38-33 (TC) Always Below 1 Ω
      F41-13 (TC) or A38-33 (TC) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. B008K5PC02
      *a Front view of DLC3

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F41-4 (CG) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. REPLACE ECM

    B008K5PC01
    *a Front view of DLC3

    1. Replace the ECM.

      for 8NR-FTS: Click here

      for 3ZR-FAE: Click here

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

      SST
      09843-18040

    3. Check that the ABS warning, slip indicator and brake hold standby indicator lights are blinking.

      OK
      The ABS warning, slip indicator and brake hold standby 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

      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    A

    END

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    C

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here