DYNAMIC TORQUE CONTROL AWD SYSTEM AWD Warning Light Remains ON

DESCRIPTION

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

If the 4WD ECU assembly stores any DTCs which are related to the dynamic torque control AWD system, the master warning light illuminates and the AWD warning message is displayed on the multi-information display in the combination meter assembly.

WIRING DIAGRAM

B005N7UE12

CAUTION / NOTICE / HINT

Note


  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

  • When the 4WD ECU assembly is replaced with a known good one from another vehicle, it is necessary to perform calibration.

    Click here

Tech Tips

Check the condition of each related circuit connector before troubleshooting.

Click here

PROCEDURE


  1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM AND DYNAMIC TORQUE CONTROL AWD SYSTEM)


    1. Check if CAN communication system DTCs are output.

      Click here

    2. Check if the dynamic torque control AWD system DTC is output.

      Click here


      Chassis > Four Wheel Drive > Trouble Codes
      Result
      Result Proceed to
      CAN communication DTCs and dynamic control AWD system DTCs are not output A
      CAN communication DTCs are output B
      Dynamic torque control AWD system DTCs are output C

      Tech Tips

      If CAN communication DTCs are output, perform troubleshooting for the CAN communication system first.


    B

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

    C

    REPAIR CIRCUIT INDICATED BY OUTPUT CODE (DYNAMIC TORQUE CONTROL 4WD SYSTEM) Click here

    A

  2. CHECK 4WD ECU ASSEMBLY


    1. Check if the 4WD ECU assembly connector is securely connected.

      OK
      The connector is securely connected.
      Result
      Proceed to
      OK
      NG

    NG

    CONNECT CONNECTOR TO ECU CORRECTLY

    OK

  3. INSPECT BATTERY


    1. Check the battery voltage.

      Standard Voltage
      11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK CHARGING SYSTEM for 2GR-FKS: Click here
    CHECK CHARGING SYSTEM for 8AR-FTS: Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (IG1 TERMINAL)


    1. Disconnect the R10 4WD ECU assembly connector.

    2. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      R10-3 (IG1) - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (GND TERMINAL)


    1. Turn the engine switch off.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R10-4 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. READ VALUE USING GTS (4WD WARNING LIGHT)


    1. Connect the R10 4WD ECU assembly connector.

    2. Turn the engine switch off.

    3. Connect the GTS to the DLC3.

    4. Turn the engine switch on (IG).

    5. Turn the GTS on.

    6. Enter the following menus: Chassis / Four Wheel Drive / Data List.

    7. According to the display on the GTS, read the Data List.


      Chassis > Four Wheel Drive > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      4WD Warning Light AWD warning (multi-information display) OFF or ON

      OFF: Warning off

      ON: Warning on

      		 -

      Chassis > Four Wheel Drive > Data List
      Tester Display
      4WD Warning Light

    8. Check the GTS display condition of the 4WD Warning Light.

      Result
      Result Proceed to
      Display of the Data List remains OFF A
      Display of the Data List remains ON B

    A

    GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    B

    REPLACE 4WD ECU ASSEMBLY Click here