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

B003U73E26
*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 zero point calibration and store system information.

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. B003VQIC64
      *a Front view of DLC3

      Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      K9-13 (TC) - K9-4 (CG) Engine switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

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

    OK

  3. REPLACE ECM


    1. B003VQIC64
      *a Front view of DLC3

      Turn the engine switch off.

    2. Replace the ECM.

      for 2GR-FSE: Click here

      for 4GR-FSE: Click here

    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

      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

    REPLACE BRAKE ACTUATOR ASSEMBLY for LHD: Click here
    REPLACE BRAKE ACTUATOR ASSEMBLY for RHD: Click here

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


    1. Turn the engine switch off.

    2. Disconnect the A77 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K9-13 (TC) - A77-21 (TC) Always Below 1 Ω
      K9-13 (TC) - Body ground Always 10 kΩ or higher
      A77-21 (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. B003VQIC65
      *a Front view of DLC3

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K9-4 (CG) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. REPLACE ECM


    1. B003VQIC64
      *a Front view of DLC3

      Replace the ECM.

      for 2GR-FSE: Click here

      for 4GR-FSE: Click here

    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

      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

    REPLACE BRAKE ACTUATOR ASSEMBLY for LHD: Click here
    REPLACE BRAKE ACTUATOR ASSEMBLY for RHD: Click here