DYNAMIC TORQUE CONTROL 4WD/AWD SYSTEM 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 Dot Display Type:

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

Tech Tips

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

A01CWALE20

CAUTION / NOTICE / HINT

Tech Tips

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: Click here

      for RHD: Click here

      Result
      Proceed to
      CAN communication system DTC is not output
      CAN communication system DTC is output (for LHD)
      CAN communication system DTC is output (for RHD)

    CAN communication system DTC is output (for LHD)

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

    CAN communication system DTC is output (for RHD)

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

    CAN communication system DTC is not output

  2. INSPECT DLC3


    1. A01CYJPC94
      *a 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

    GO TO STEP 5 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, 1AD-FTV:

      Disconnect the A61 ECM connector.

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

      Standard Resistance
      for 2AR-FE, 3ZR-FAE, 3ZR-FE
      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
      for 2AD-FHV, 2AD-FTV, 1AD-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
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A01CWH9C51
      *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. A01CYJPC94
      *a DLC3

      Turn the ignition switch off.

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

      SST
      09843-18040

    3. Turn the ignition switch to ON.

    4. Check that the malfunction indicator lamp is blinking.

      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 blinking (for 1AD-FTV)
      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 blinking (for 1AD-FTV)

    REPLACE ECM Click here

    Malfunction indicator lamp is not blinking

    REPLACE 4WD ECU ASSEMBLY Click here