How To Proceed With Troubleshooting

HINT:

• Use these procedures to troubleshoot the active torque control 4WD system.
• *: Use the intelligent tester (with CAN VIM).

1. VEHICLE BROUGHT TO WORKSHOP 
2. INSPECT BATTERY VOLTAGE 

   Standard voltage: 11 to 14 V 

   If the voltage is below 11 V, recharge or replace the battery before proceeding.

3. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* 
   1. Use the intelligent tester (with CAN VIM) to check if the CAN communication system is functioning normally.

      Result 

      RESULT
      
      

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

   B: Go to  CAN COMMUNICATION SYSTEM 

   A: GO TO NEXT STEP. 

4. CHECK INDICATOR LIGHT 
5. CHECK DTC* 
   1. Check for DTCs (see DTC CHECK / CLEAR ).
   2. Clear the DTCs.
   3. Recheck for DTCs.

      Result 

      RESULT
      
      

      Result	Proceed to
      DTC dose not reoccur	A
      DTC dose reoccur	B

   B: GO TO STEP   8 

   A: GO TO NEXT STEP. 

6. PROBLEM SYMPTOMS TABLE 

   Result 

   PROBLEM SYMPTOMS TABLE
   
   

   Result	Proceed to
   Fault not listed in problem symptoms table	A
   Fault listed in problem symptoms table	B

   B: Go to step   8 

   A: GO TO NEXT STEP. 

7. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. TERMINALS OF ECU  .
   2. DATA LIST / ACTIVE TEST  .
8. REPAIR OR REPLACE 
9. CONFIRMATION TEST 

   NEXT: END