How To Proceed With Troubleshooting

HINT:

• Use this procedure to troubleshoot the multiplex communication system.
• *: Use the intelligent tester.

1. VEHICLE BROUGHT TO WORKSHOP 

   NEXT 

2. CHECK BATTERY VOLTAGE 

   Standard voltage: 11 V or higher 

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

   NEXT 

3. CHECK DTC OF CAN COMMUNICATION SYSTEM 
   1. Using the intelligent tester, check if the CAN is functioning normally.

      Result: 

      DTC OUTPUT 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 FOR DTC* 
   1. Check for DTCs and note any codes that are output (see DTC CHECK / CLEAR ).
   2. Delete the DTC.
   3. Recheck for DTCs. Try to prompt the DTC by simulating the original activity that the DTC suggests.

      Result: 

      DTC OUTPUT RESULT
      
      

      Result	Proceed to
      DTC does not reoccur	A
      DTC reoccurs	B

   B : Go to step   6 

   A : GO TO NEXT STEP 

5. OVERALL ANALYSIS AND TROUBLESHOOTING 
   1. TERMINALS OF ECU .

   NEXT 

6. ADJUST, REPAIR OR REPLACE 

   NEXT 

7. CONFIRMATION TEST 

   NEXT : END