ELECTRONICALLY CONTROLLED BRAKE 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 light, brake warning light / yellow (minor malfunction), slip indicator light and/or brake hold standby indicator light.

WIRING DIAGRAM

A01GNBSE03

INSPECTION PROCEDURE

CAUTION:

When replacing the skid control ECU, perform initialization of linear solenoid valve calibration Click here.

PROCEDURE


  1. INSPECT DLC3 (TC AND CG TERMINAL)


    1. A01GKCJE85

      Turn the engine switch on (IG).

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      L31-13 (TC) - Body ground Engine switch on (IG) 11 to 14 V

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

      Standard resistance
      Tester Connection Condition Specified Condition
      L31-4 (CG) - Body ground Always Below 1 Ω

    NG

    CHECK HARNESS AND CONNECTOR (DLC3 - ECM) Click here

    OK

  2. CHECK CAN COMMUNICATION SYSTEM


    1. for LHD:

      Check if the CAN communication DTC is output Click here.

      for RHD:

      Check if the CAN communication DTC is output Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output (for LHD) B
      DTC is output (for RHD) C

      Tech Tips

      If troubleshooting has been carried out according to the "PROBLEM SYMPTOMS TABLE", refer back to the table and proceed to the next step before replacing the part Click here.


    B

    GO TO CAN COMMUNICATION SYSTEM (for LHD) Click here

    C

    GO TO CAN COMMUNICATION SYSTEM (for RHD) Click here

    A

  3. CHECK HARNESS AND CONNECTOR (DLC3 - ECM)


    1. Disconnect the A13 ECM connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      L31-13 (TC) - A13-21 (TC) Always Below 1 Ω
      L31-13 (TC) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (DLC3 - BODY GROUND)


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

      Standard resistance
      Tester Connection Condition Specified Condition
      L31-4 (CG) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK ECM (DLC3 INPUT)


    1. A01GKCJE85

      Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.

      SST
      09843-18040

    2. Check if the ABS warning light is blinking.

      Result
      Result Proceed to
      ABS warning light is blinking A

      for 1UR-FSE:

      ABS warning light is not blinking

      		 B

      for 1UR-FE:

      ABS warning light is not blinking

      		 C

    B

    REPLACE ECM (for 1UR-FSE) Click here

    C

    REPLACE ECM (for 1UR-FE) Click here

    A

  6. CHECK CAN COMMUNICATION SYSTEM


    1. for LHD:

      Check if the CAN communication DTC is output Click here.

      for RHD:

      Check if the CAN communication DTC is output Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output (for LHD) B
      DTC is output (for RHD) C

      Tech Tips

      If troubleshooting has been carried out according to the "PROBLEM SYMPTOMS TABLE", refer back to the table and proceed to the next step before replacing the part Click here.


    B

    GO TO CAN COMMUNICATION SYSTEM (for LHD) Click here

    C

    GO TO CAN COMMUNICATION SYSTEM (for RHD) Click here

    A

    REPLACE SKID CONTROL ECU Click here