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ELECTRONICALLY CONTROLLED BRAKE SYSTEM TC and CG Terminal Circuit

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DTC Code DTC Name
  TC and CG Terminal Circuit
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DESCRIPTION

Connecting terminals TC and CG of the DLC3 causes the ECU to display the DTC by blinking the ABS warning, brake warning / yellow (minor malfunction) and slip indicator lights.

Table 1. *a Power Management Control ECU *b Skid Control ECU (Brake Booster with Master Cylinder Assembly) *c CAN Communication Line
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WIRING DIAGRAM

Tip:

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.

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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).

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PROCEDURE


  1. Click here

    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

  2. Click here

    CHECK HARNESS AND CONNECTOR (TC of DLC3 - POWER MANAGEMENT CONTROL ECU)


    1. Disconnect the H1 power management control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H29-13 (TC) - H1-11 (TC) Always Below 1 Ω

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  3. Click here

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


    1. A00089QE02

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H29-4 (CG) - Body ground Always Below 1 Ω
      Table 2. Text in Illustration
      *a Front view of DLC3

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. Click here

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


    1. A000849E01

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H29-13 (TC) - Body ground Always 10 kΩ or higher
      Table 3. Text in Illustration
      *a Front view of DLC3
      Tip:

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


    • OK

      REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (Click here)

    • NG

      REPAIR OR REPLACE WIRE HARNESS OR EACH ECU