How To Proceed With Troubleshooting

1. VEHICLE BROUGHT TO WORKSHOP 
2. PROBLEM SYMPTOM CONFIRMATION 
3. CHECK MULTIPLEX COMMUNICATION SYSTEM 

   Refer to the how to proceed with troubleshooting (See HOW TO PROCEED WITH TROUBLESHOOTING ).

   1. Check for output DTCs.

   Result 

   RESULT CHART
   
   

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

   HINT:

   The hybrid vehicle control ECU of this system is connected to the multiplex communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the multiplex communication system.

   B: PROCEED TO "MULTIPLEX COMMUNICATION SYSTEM" 

   A: Go to next step. 

4. CHECK CAN COMMUNICATION SYSTEM 

   Refer to the precaution (See CAN COMMUNICATION SYSTEM ).

   1. Check for output DTCs.

      Result 

      RESULT CHART
      
      

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

      HINT:

      The hybrid vehicle control ECU of this system is connected to the CAN communication system.

      Therefore, before starting troubleshooting, make sure to check that there is no trouble in the CAN communication system.

      B: PROCEED TO  CAN COMMUNICATION SYSTEM 

      A: Go to next step. 

5. DTC CHECK AND CLEAR 

   Refer to the DTC check/clear (See DTC CHECK / CLEAR ).

6. DTC CHECK (OTHER THAN MPX AND CAN SYSTEM DTC) 

   Refer to the DTC check/clear (See DTC CHECK / CLEAR ).

   Result 

   RESULT CHART
   
   

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

   A:  GO TO STEP  8

   B: Go to next step. 

7. DTC CHART 

   Refer to the diagnostic trouble code chart (See DIAGNOSTIC TROUBLE CODE CHART ).

   NEXT:  GO TO STEP  11

8. PROBLEM SYMPTOM SIMULATION 

   Result 

   RESULT CHART
   
   

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

   B:  GO TO STEP  10

   A: Go to next step. 

9. SYMPTOM SIMULATION 

   Refer to the electronic circuit inspection procedure (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

10. PROBLEM SYMPTOMS TABLE 

    Refer to the problem symptoms table (See PROBLEM SYMPTOMS TABLE ).

11. CIRCUIT INSPECTION 
12. TERMINALS OF ECU 

    Refer to the terminals of ECU (See TERMINALS OF ECU ).

13. IDENTIFICATION OF PROBLEM 
14. REPAIR OR REPLACE 
15. CONFIRMATION TEST 

NEXT: END