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

WIRING DIAGRAM

A01MH6SE01
*a EV control ECU
*b Skid Control ECU (Brake Booster with Master Cylinder Assembly)
*c CAN Communication Line

Tech Tips

When the warning lights blink without terminals TC and CG connected, a ground short in the wiring of terminal TC of the DLC3 or an internal ground short in one or more ECUs is suspected.

CAUTION / NOTICE / HINT

Note

When replacing the skid control ECU (brake booster with master cylinder assembly), perform initialization and calibration of the linear solenoid valve.

Click here

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if CAN communication system DTCs are output.


      Result
      Result Proceed to
      DTCs are not output. A
      DTCs are output (for RHD). B
      DTCs are output (for LHD). C

    B

    INSPECT CAN COMMUNICATION SYSTEM Click here

    C

    INSPECT CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK HARNESS AND CONNECTOR (TC of DLC3 - EV CONTROL ECU)


    1. Disconnect the G46 EV control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G8-13 (TC) - G46-28 (TC) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A01MHZDC47
      *a Front view of DLC3

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G8-4 (CG) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A01MHZDC49
      *a Front view of DLC3

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G8-13 (TC) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for RHD) A
      OK (for LHD) B
      NG C

    A

    REPLACE EV CONTROL ECU Click here

    B

    REPLACE EV CONTROL ECU Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR