DYNAMIC TORQUE CONTROL 4WD/AWD SYSTEM TC and CG Terminal Circuit

DTC Code DTC Name
TC and CG Terminal Circuit

DESCRIPTION

for Segment Display Type:

Connecting terminals TC and CG of the DLC3 causes the 4WD ECU assembly to display 2-digit DTCs by flashing the 4WD/AWD warning light.

for TFT Display Type:

Connecting terminals TC and CG of the DLC3 causes the 4WD ECU assembly to display a DTC on the multi-information display.

Tip:

When each warning light remains blinking, a short to ground in the wiring of terminal TC of the DLC3 or an internal short to ground in each ECU is suspected.

WIRING DIAGRAM

C256466E29

CAUTION / NOTICE / HINT

Tip:

Check the condition of each related circuit connector before troubleshooting.

Click here

PROCEDURE

  1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM)

    1. Check if the CAN communication system DTC is output.

      for LHD with Central Gateway ECU:Click hereClick here

      for RHD with Central Gateway ECU:Click hereClick hereClick here

      for LHD without Central Gateway ECU:Click hereClick here

      for RHD without Central Gateway ECU:Click hereClick here

      Result

      Result

      Proceed to

      CAN communication system DTC is not output

      A

      CAN communication system DTC is output (for LHD with Central Gateway ECU)

      B

      CAN communication system DTC is output (for RHD with Central Gateway ECU)

      C

      CAN communication system DTC is output (for LHD without Central Gateway ECU)

      D

      CAN communication system DTC is output (for RHD without Central Gateway ECU)

      E
    B

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

    Click here

    C

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

    Click here

    D

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

    Click here

    E

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

    Click here

    A

  2. INSPECT DLC3

    1. C146309C94

      *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

      Switch Condition

      Specified Condition

      G14-13 (TC) - G14-4 (CG)

      Ignition switch ON

      11 to 14 V

      Result

      Proceed to

      OK

      NG
    OK

    INSPECT ECM (TC of DLC3 INPUT)Click here

    NG

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

    1. Turn the ignition switch off.

    2. for 2AR-FE, 3ZR-FAE, 3ZR-FE:

      Disconnect the A62 ECM connector.

      for 2AD-FHV, 2AD-FTV:

      Disconnect the A61 ECM connector.

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

      Standard Resistance

      Table 1. for 2AR-FE, 3ZR-FE (for K111, K111F)

      Tester Connection

      Condition

      Specified Condition

      G14-13 (TC) - A62-23 (TC)

      Always

      Below 1 Ω

      G14-13 (TC) - Body ground

      Always

      10 kΩ or higher
      Table 2. for 2AD-FHV, 2AD-FTV

      Tester Connection

      Condition

      Specified Condition

      G14-13 (TC) - A61-26 (TC)

      Always

      Below 1 Ω

      G14-13 (TC) - Body ground

      Always

      10 kΩ or higher
      Table 3. for 3ZR-FAE, 3ZR-FE (execept K111, K111F)

      Tester Connection

      Condition

      Specified Condition

      G14-13 (TC) - A62-33 (TC)

      Always

      Below 1 Ω

      G14-13 (TC) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (CG OF DLC3 - BODY GROUND)

    1. C166029C51

      *a

      Front view of DLC3

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G14-4 (CG) - Body ground

      Always

      Below 1 Ω

      Result

      Proceed to

      OK

      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT ECM (TC of DLC3 INPUT)

    1. C146309C94

      *a

      Front view of DLC3

      Turn the ignition switch off.

    2. Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.

    3. Turn the ignition switch to ON.

    4. Check that the malfunction indicator lamp is blinking.

    09843-18040

    Result

    Proceed to

    Malfunction indicator lamp is blinking (for 2AD-FHV)

    Malfunction indicator lamp is blinking (for 2AD-FTV)

    Malfunction indicator lamp is blinking (for 2AR-FE)

    Malfunction indicator lamp is blinking (for 3ZR-FAE)

    Malfunction indicator lamp is blinking (for 3ZR-FE)

    Malfunction indicator lamp is not blinking
    Malfunction indicator lamp is blinking (for 2AD-FHV)

    REPLACE ECM

    Click here

    Malfunction indicator lamp is blinking (for 2AD-FTV)

    REPLACE ECM

    Click here

    Malfunction indicator lamp is blinking (for 2AR-FE)

    REPLACE ECM

    Click here

    Malfunction indicator lamp is blinking (for 3ZR-FAE)

    REPLACE ECM

    Click here

    Malfunction indicator lamp is blinking (for 3ZR-FE)

    REPLACE ECM

    Click here

    Malfunction indicator lamp is not blinking

    REPLACE 4WD ECU ASSEMBLY

    Click here