ACTIVE TORQUE CONTROL 4WD SYSTEM AWD Warning Light Remains ON

DESCRIPTION

The AWD control ECU is connected to the combination meter via the CAN communication system.

If the AWD control ECU stores any DTCs which are related to the active torque control 4WD system, the AWD warning light comes on in the combination meter.

WIRING DIAGRAM

A01EJQEE09

INSPECTION PROCEDURE

Tech Tips

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

PROCEDURE


  1. CHECK FOR DTC


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

    2. Check if the active torque control 4WD system DTC is output Click here.

      Result
      Result Proceed to
      Neither CAN communication system DTC nor active torque control 4WD system DTC is output A
      CAN communication DTC is output B
      Active torque control 4WD system DTC is output C

      Tech Tips

      When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor.


    B

    REPAIR CIRCUIT INDICATOR BY OUTPUT CODE (CAN COMMUNICATION SYSTEM) Click here

    C

    REPAIR CIRCUIT INDICATOR BY OUTPUT CODE (ACTIVE TORQUE CONTROL 4WD SYSTEM) Click here

    A

  2. CHECK IF AWD CONTROL ECU CONNECTOR IS SECURELY CONNECTED


    1. Check if the skid control ECU connector is securely connected.

      OK
      The connector is securely connected.

    NG

    CONNECT CONNECTOR TO ECU CORRECTLY

    OK

  3. CHECK BATTERY


    1. Check the battery voltage.

      Standard voltage
      11 to 14 V
      Result
      Result Proceed to
      OK A
      NG B

    B

    INSPECT CHARGING SYSTEM Click here

    A

  4. PERFORM ACTIVE TEST (AWD WARNING LIGHT)


    1. Warm up the engine.

    2. Turn the ignition switch off.

    3. Connect the GTS to the DLC3.

    4. Turn the ignition switch to ON.

    5. Turn the GTS on.

    6. Enter the following menus: Chassis / 4WD / Active Test.

    7. According to the display on the GTS, perform the Active Test.

      Chassis / 4WD / Active Test
      Tester Display Test Part Control Range Diagnostic Note
      4WD Warning Light AWD warning light Warning light is ON/OFF Observer combination meter
      OK
      The AWD warning light turns off.

    NG

    CHECK WIRE HARNESS OR CONNECTOR (AWD CONTROL ECU - BATTERY) Click here

    OK

    REPLACE AWD CONTROL ECU Click here

  5. CHECK WIRE HARNESS OR CONNECTOR (AWD CONTROL ECU - BATTERY)


    1. A01ELWME16
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to AWD Control ECU)

      Disconnect the ECU connector.

    2. Turn the ignition switch to ON.

    3. Measure the voltage of the wire harness side connector.

      Standard Voltage
      Tester Connection Condition Specified Condition
      D38-11 (IG1) - Body Ground Ignition switch ON 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK WIRE HARNESS OR CONNECTOR (AWD CONTROL ECU - BODY GROUND)


    1. A01ELWME17
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to AWD Control ECU)

      Disconnect the ECU connector.

    2. Measure the resistance of the wire harness side connector.

      Standard Resistance
      Tester Connection Condition Specified Condition
      D38-23 (GND) - Body Ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    GO TO METER / GAUGE SYSTEM Click here