ANTI-LOCK BRAKE SYSTEM TC and CG Terminal Circuit

DESCRIPTION

DTC output mode is set by connecting terminals TC and CG of the DLC3.

The DTCs are displayed by the blinking pattern of the ABS warning light.

WIRING DIAGRAM

A01BBXQE03

Tech Tips

When warning 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 ECU is suspected.

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT DLC3 (BETWEEN DLC3 (TC) AND DLC3 (CG))


    1. A01BC3RE48

      Turn the ignition switch to the ON position.

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

      Standard voltage
      Tester Connection Specified Condition
      H23-13 (TC) - H23-4 (CG) 10 to 14 V

    NG

    CHECK HARNESS AND CONNECTOR (BETWEEN DLC3 (CG) AND BODY GROUND) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (BETWEEN SKID CONTROL ECU AND DLC3 (TC))


    1. A01BHAKE01

      Turn the ignition switch off.

    2. Disconnect the skid control ECU connector.

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

      Standard resistance
      Tester Connection Specified Condition
      B19-16 (TC) - H23-13 (TC) Below 1 Ω
      B19-16 (TC) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY

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


    1. A01BC3RE51

      Turn the ignition switch off.

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

      Standard resistance
      Tester Connection Specified Condition
      H23-4 (CG) - Body ground Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (BETWEEN SKID CONTROL ECU AND DLC3 (TC))


    1. A01BHAKE01

      Disconnect the skid control ECU connector.

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

      Standard resistance
      Tester Connection Specified Condition
      B19-16 (TC) - H23-13 (TC) Below 1 Ω
      B19-16 (TC) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY