Inspection Procedure

HINT:

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

1. CHECK FOR DTC 
   1. Clear the DTC (see DTC CHECK / CLEAR ).
   2. Turn the ignition switch OFF.
   3. Turn the ignition switch ON again and check that CAN communication system DTC(s) is not output.
   4. Drive the vehicle, accelerate to a speed of 20 km/h (12 mph) or more, and check if the speed sensor DTC (brake control system DTC) is output (see DIAGNOSTIC TROUBLE CODE CHART ).

      Result 

      RESULT
      
      

      Result	Proceed to
      Neither CAN communication system DTC nor brake control system DTC is out put	A
      CAN communication system DTC is output	B
      Brake control system DTC (speed sensor DTC) is output	C

      HINT:

      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) 

   C: REPAIR CIRCUIT INDICATOR BY OUTPUT CODE (BRAKE CONTROL SYSTEM) 

   A: GO TO NEXT STEP. 

2. CHECK OPERATION OF 4WD CONTROL ECU 
   1. Replace the 4WD control ECU with a normally functioning or new one.
   2. Reconfirm DTC.

      OK: DTC is output. 

   OK: REPLACE 4WD CONTROL ECU 

   NG: GO TO  BRAKE CONTROL  /VEHICLE STABILITY CONTROL SYSTEM)