POWER STEERING SYSTEM TC and CG Terminal Circuit

DTC Code DTC Name
TC and CG Terminal Circuit

DESCRIPTION

Connecting terminals TC and CG of the DLC3 causes the ECU to display DTCs by blinking the EPS warning light.

WIRING DIAGRAM

C302892E02

CAUTION / NOTICE / HINT

Note:

If the power steering ECU assembly has been replaced, perform assist map writing and torque sensor zero point calibration.

Click here

Tip:

When the 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 ECUs is suspected.

PROCEDURE

  1. CHECK CAN COMMUNICATION SYSTEM

    1. Check for DTCs.

      Click hereClick here

    Result

    Result

    Proceed to

    CAN communication system DTCs are not output.

    A

    CAN communication system DTCs are output.

    B
    B

    GO TO CAN COMMUNICATION SYSTEM

    Click hereClick here

    A

  2. INSPECT DLC3

    1. C269872C30

      *a

      Front view of DLC3

      Turn the ignition switch to ON.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      E8-13 (TC) - E8-4 (CG)

      Ignition switch ON

      9 to 16 V

    Result

    Proceed to

    OK

    NG
    NG

    CHECK HARNESS AND CONNECTOR (TC of DLC3 - ECM)Click here

    OK

  3. REPLACE ECM

    1. C269872C31

      *a

      Front view of DLC3

      Turn the ignition switch off.

    2. Replace the ECM.

      for 1KR-FE:Click here

      for 1PP:Click here

    3. Using SST, connect terminals TC and CG of the DLC3.

    4. Check that the EPS warning light is blinking.

      OK

      The EPS warning light is blinking.

      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

    09843-18040

    Result

    Proceed to

    OK

    NG
    OK

    END

    NG

    REPLACE POWER STEERING ECU ASSEMBLY

    Click here

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

    1. Disconnect the A34 or B56 ECM connector.

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

      Standard Resistance

      Table 1. for 1KR-FE

      Tester Connection

      Condition

      Specified Condition

      E8-13 (TC) - A34-57 (TC)

      Always

      Below 1 Ω

      E8-13 (TC) or A34-57 (TC) - Body ground

      Always

      10 kΩ or higher
      Table 2. for 1PP

      Tester Connection

      Condition

      Specified Condition

      E8-13 (TC) - B56-5 (TC)

      Always

      Below 1 Ω

      E8-13 (TC) or B56-5 (TC) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    1. C303102C01

      *a

      Front view of DLC3

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E8-4 (CG) - Body ground

      Always

      Below 1 Ω
      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

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR OR EACH ECU

    OK

  6. REPLACE ECM

    1. C269872C31

      *a

      Front view of DLC3

      Replace the ECM.

      for 1KR-FE:Click here

      for 1PP:Click here

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

    3. Check that the EPS warning light is blinking.

      OK

      The EPS warning light is blinking.

      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

    09843-18040

    Result

    Proceed to

    OK

    NG
    OK

    END

    NG

    REPLACE POWER STEERING ECU ASSEMBLY

    Click here