FOUR WHEEL DRIVE CONTROL SYSTEM AWD Warning Light Remains ON

DESCRIPTION

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

If any of the following is detected, the multi-information display indicates a malfunction in the four-wheel drive control system.


Tech Tips

When DTC C1297/97, U0100/85, or U0126/84 is detected, the 4WD warning is not displayed.

WIRING DIAGRAM

A01FG9HE01

INSPECTION PROCEDURE

Tech Tips

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

PROCEDURE


  1. CHECK DTC


    1. Check the output DTC 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

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

    C

    REPAIR CIRCUIT INDICATOR BY OUTPUT CODE Click here

    A

  2. INSPECT BATTERY


    1. Check the battery voltage.

      Standard voltage
      11 to 14 V

    NG

    INSPECT CHARGING SYSTEM Click here

    OK

  3. CHECK WIRE HARNESS AND CONNECTOR (IG1 TERMINAL)


    1. A01FIPAE04
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to 4WD ECU Assembly)

      Disconnect the 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

      A33-11 (IG1) -

      Body ground

      		 Engine switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK WIRE HARNESS AND CONNECTOR (GND TERMINAL)


    1. A01FIPAE05
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to 4WD ECU Assembly)

      Turn the engine switch off.

    2. Disconnect the 4WD ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition

      A33-23 (GND) -

      Body ground

      		 Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

    5. Enter the following menus: Chassis / Four Wheel Drive / Active Test Click here.

      Four Wheel Drive
      Tester Display Test Part Control Range Diagnostic Note
      4WD Warning Light AWD warning (multi-information display) Warning ON/OFF Observe the multi-information display.

    6. When performing the 4WD Warning Light Active Test, check 4WD Warning Light in the Data List Click here.

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

      ON: Warning on

      OFF: Warning off

      		 -
      Result
      Result Proceed to
      Data List Display Data List Display when Performing Active Test ON/OFF Operation
      ON Changes between ON and OFF A
      Does not change between ON and OFF B
      OFF Changes between ON and OFF A
      Does not change between ON and OFF B

    B

    REPLACE 4WD ECU ASSEMBLY Click here

    A

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