ACTIVE TORQUE CONTROL 4WD SYSTEM Warning Light Circuit

DESCRIPTION

The 4WD control ECU is connected to the combination meter via the CAN communication system.

If the 4WD 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

A019MN3E02

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 4WD control system DTC is output Click here.

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

    NG

    INSPECT CHARGING SYSTEM

    OK

  4. PERFORM ACTIVE TEST (4WD WARNING LIGHT)


    1. Warm up the engine.

    2. Turn the engine switch off.

    3. Connect the intelligent tester to the DLC3.

    4. Turn the engine switch on (IG).

    5. Turn the intelligent tester on.

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

    7. According to the display on the intelligent tester, perform the Active Test.

      Chassis / 4WD / Active Test
      Tester Display Test Part Control Range Diagnostic Note
      4WD Warning Light Master Warning Light and Multi-information Display

      ON: Master warning light and Multi-information display on

      OFF: Master warning light and Multi-information display off

      		 Observe combination meter
      OK
      The warning light turns off.
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    B

    REPLACE 4WD ECU ASSEMBLY (for RHD) Click here

    C

    CHECK WIRE HARNESS OR CONNECTOR (4WD ECU - BATTERY) Click here

    A

    REPLACE 4WD ECU ASSEMBLY (for LHD) Click here

  5. CHECK WIRE HARNESS OR CONNECTOR (4WD ECU - BATTERY)


    1. A019JTYE20
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to 4WD Control ECU)

      Disconnect the ECU connector.

    2. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      O2-11 (IG1) - Body Ground Engine switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK WIRE HARNESS OR CONNECTOR (4WD ECU - BODY GROUND)


    1. A019JTYE21
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to 4WD Control ECU)

      Disconnect the ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O2-23 (GND) - Body Ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    GO TO METER / GAUGE SYSTEM Click here