ELECTRONICALLY CONTROLLED BRAKE SYSTEM TS and CG Terminal Circuit

DESCRIPTION

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

In Test Mode (signal check), a malfunction in a speed sensor that cannot be detected when the vehicle is stopped can be detected while driving.

Sensor check mode can be entered by connecting terminals TS and CG of the DLC3 and turning the power switch from off to on (IG).

WIRING DIAGRAM

A000862E01
*a Skid Control ECU (Brake Booster with Master Cylinder Assembly)
*b CAN Communication Line
*c Power Steering ECU Assembly

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 Click here.

      Result
      Result Proceed to
      DTCs are not output. A
      DTCs are output. B

    B

    INSPECT CAN COMMUNICATION SYSTEM Click here

    A

  2. INSPECT DLC3


    1. A0008XFE03
      Text in Illustration
      *a Front view of DLC3

      Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H29-12 (TS) - H29-4 (CG) Power switch on (IG) 11 to 14 V

    NG

    CHECK HARNESS AND CONNECTOR (TS of DLC3 - POWER STEERING ECU ASSEMBLY) Click here

    OK

  3. CHECK POWER STEERING ECU ASSEMBLY (TS of DLC3 INPUT)


    1. A0008XFE03
      Text in Illustration
      *a Front view of DLC3

      Turn the power switch off.

    2. Using SST, connect terminals TS and CG of the DLC3.

      SST
      09843-18040

    3. Check that the EPS warning light is blinking.

      OK
      The EPS warning light is blinking.
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

      Tech Tips

      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 parts Click here.


    A

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY Click here

    B

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY Click here

    C

    REPAIR OR REPLACE WIRE HARNESS OR POWER STEERING ECU ASSEMBLY

  4. CHECK HARNESS AND CONNECTOR (TS of DLC3 - POWER STEERING ECU ASSEMBLY)


    1. Turn the power switch off.

    2. Disconnect the c1 power steering ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H29-12 (TS) - c1-6 (TS) Always Below 1 Ω
      H29-12 (TS) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A00089QE02
      Text in Illustration
      *a Front view of DLC3

      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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK POWER STEERING ECU ASSEMBLY (TS of DLC3 INPUT)


    1. A0008XFE03
      Text in Illustration
      *a Front view of DLC3

      Reconnect the c1 power steering ECU assembly connector.

    2. Using SST, connect terminals TS and CG of the DLC3.

      SST
      09843-18040

    3. Check that the EPS warning light is blinking.

      OK
      The EPS warning light is blinking.
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

      Tech Tips

      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 parts Click here.


    A

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY Click here

    B

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY Click here

    C

    REPAIR OR REPLACE WIRE HARNESS OR POWER STEERING ECU ASSEMBLY