FOUR WHEEL DRIVE CONTROL SYSTEM TC and CG Terminal Circuit

DESCRIPTION

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

WIRING DIAGRAM

A01FIROE01

INSPECTION PROCEDURE

Tech Tips

Check the condition of each related circuit connector before troubleshooting Click here.

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if a CAN communication system DTC is output Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

    B

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

    A

  2. INSPECT DLC3 TERMINAL VOLTAGE (TC TERMINAL VOLTAGE)


    1. A01FF30E50
      Text in Illustration
      *a Front view of DLC3

      Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      N20-13 (TC) - N20-4 (CG) Engine switch on (IG) 11 to 14 V

    3. Turn the engine switch off.

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

      Standard Resistance
      Tester Connection Condition Condition
      N20-4 (CG) - Body ground Always Below 1 Ω

    NG

    CHECK HARNESS AND CONNECTOR (ECM - DLC3) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (ECM - DLC3)


    1. Disconnect the A21 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A21-21 (TC) - N20-13 (TC) Always Below 1 Ω
      N20-13 (TC) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (TC TERMINAL CIRCUIT)

    OK

    REPLACE 4WD ECU ASSEMBLY Click here

  4. CHECK HARNESS AND CONNECTOR (ECM - DLC3)


    1. Disconnect the A21 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A21-21 (TC) - N20-13 (TC) Always Below 1 Ω
      N20-13 (TC) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (TC TERMINAL CIRCUIT)

    OK

  5. CHECK HARNESS AND CONNECTOR (DLC3 CG CIRCUIT)


    1. A01FF30E51
      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
      N20-4 (CG) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (CG TERMINAL CIRCUIT)

    OK

  6. CHECK WARNING LIGHT (MIL)


    1. A01FF30E50
      Text in Illustration
      *a Front view of DLC3

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

      SST
      09843-18040

    2. Check that the MIL is blinking.

      Result
      Result Proceed to
      MIL is blinking A
      MIL is not blinking B

    B

    REPLACE ECM Click here

    A

    REPLACE 4WD ECU ASSEMBLY Click here