ELECTRONICALLY CONTROLLED BRAKE SYSTEM TS and CG Terminal Circuit

DESCRIPTION

In the sensor check mode, a malfunction of the speed sensor that cannot be detected when the vehicle is stopped is detected while driving.

Transition to the sensor check mode can be performed by connecting terminals TS and CG of the DLC3 and turning the power switch from OFF to ON (IG).

WIRING DIAGRAM

A000VN4E18
*a Skid Control ECU

CAUTION / NOTICE / HINT

Note

When replacing the skid control ECU, perform the following operations:


  • Initialization of linear solenoid valve and calibration Click here

  • Yaw rate and acceleration sensor zero point calibration Click here

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - DLC3)


    1. Turn the power switch OFF.

      A000USGE01
      *1 Front view of wire harness connector: (to Skid Control ECU)
      *2 Front view of DLC3:

    2. Disconnect the A21 ECU connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      A21-24 (TS) - L31-12 (TS) Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A000YZYE01
      *1 Front view of DLC3:

      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

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


    1. A000ZMHE01
      *1 Front view of DLC3:

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

      Standard resistance
      Tester Connection Condition Specified Condition
      L31-12 (TS) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      NG A
      OK for LHD B
      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.


    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    B

    REPLACE SKID CONTROL ECU Click here

    C

    REPLACE SKID CONTROL ECU Click here