Inspection Procedure

HINT:

Check the condition of each related circuit connector before troubleshooting (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

1. CHECK TIRE CONDITION 
   1. Check the size and condition of all 4 tires (See INSPECTION ).

      HINT:

      This DTC is output when tire deformation or a difference in tire size is detected.

      OK: The diameter and air pressure of all 4 tires are the same. 

   NG: REPLACE TIRES SO THAT ALL 4 TIRES ARE THE SAME SIZE 

   OK: Go to Next Step 

2. READ VALUE OF TECHSTREAM 
   1. Connect the Techstream to the DLC3.
   2. Start the engine.
   3. Select the "Data List" on the Techstream (See DATA LIST / ACTIVE TEST  ).
   4. Check that the speed values detected at all four wheels displayed on the Techstream are the same when driving the vehicle.

      DATA LIST: 4WD 

      DATA LIST 4WD
      
      

      Item	Measurement Item / Range (Display)	Normal Condition
      FR Wheel Speed	Wheel speed sensor (FR) reading / min.: 0 mph (0 km/h), max.: 202 mph (326.4 km/h)	Actual wheel speed
      FL Wheel Speed	Wheel speed sensor (FL) reading / min.: 0 mph (0 km/h), max.: 202 mph (326.4 km/h)	Actual wheel speed
      RR Wheel Speed	Wheel speed sensor (RR) reading / min.: 0 mph (0 km/h), max.: 202 mph (326.4 km/h)	Actual wheel speed
      RL Wheel Speed	Wheel speed sensor (RL) reading / min.: 0 mph (0 km/h), max.: 202 mph (326.4 km/h)	Actual wheel speed

      OK: The speed of all four wheels displayed on the Techstream should match. 

   NG: CHECK SPEED SIGNAL CIRCUIT 

   OK: Go to Next Step 

3. RECONFIRM DTC 
   1. Clear the DTC (See DTC CHECK/CLEAR  ).
   2. Turn the engine switch off.
   3. Start the engine.
   4. Drive the vehicle at the speed of 12 mph (20 km/h) or more and check if the same DTC is output.

      Result 

      RESULT DESCRIPTION
      
      

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

   B: CHECK INTERMITTENT PROBLEMS 

   A: REPLACE 4WD CONTROL ECU