How To Proceed With Troubleshooting

HINT: 

• *: Use the Techstream
• Use the following procedure to troubleshoot the hybrid control system.

1. VEHICLE BROUGHT TO WORKSHOP 

   NEXT: Go to next step 

2. CUSTOMER PROBLEM ANALYSIS 

   NEXT: Go to next step 

3. CONNECT TECHSTREAM TO THE DLC3* 

   HINT: 

   If the display on the tester indicates a communication fault, inspect the DLC3.

   NEXT: Go to next step 

4. CHECK DTC AND SAVE FREEZE FRAME DATA*. Refer to  DTC CHECK / CLEAR  

   HINT: 

   • Make sure to save freeze frame data because the data is necessary for a simulation test.
   • For the hybrid control system, there are many DTCs, many of which can be stored due to a single malfunction. As a result, in some of the diagnosis procedures an instruction is provided to check for other DTCs and their corresponding INF codes. By following the diagnosis path based on the combination of output DTCs and INF codes, it is possible to narrow down the problem early and avoid unnecessary diagnosis.

   NEXT: Go to next step 

5. CLEAR DTC AND FREEZE FRAME DATA*. Refer to  DTC CHECK / CLEAR  

   NEXT: Go to next step 

6. CONDUCT VISUAL INSPECTION 

   NEXT: Go to next step 

7. CONFIRM PROBLEM SYMPTOMS 

   HINT: 

   If the engine does not start, perform steps 9 and 11 first.

   Result

   Result	Proceed to
   Malfunction does not occur.	A
   Malfunction occurs.	B

   B → GO TO STEP 10 

   A: Go to next step 

8. DUPLICATE CONDITIONS THAT PRODUCE SYMPTOMS 

   NEXT: Go to next step 

9. CHECK FOR DTCS*. Refer to  DTC CHECK / CLEAR  

   Result

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

   B → GO TO STEP 11 

   A: Go to next step 

10. REFER TO DTC CHART 

    HINT: 

    DTCs for the hybrid control system and hybrid battery system are displayed using the same menus on the Techstream. It is necessary to check the DTC charts for hybrid control system and hybrid battery system.

    • Hybrid Control System - DTC chart. Refer to DIAGNOSTIC TROUBLE CODE CHART 
    • Hybrid Battery System - DTC chart. Refer to DIAGNOSTIC TROUBLE CODE CHART

    NEXT → GO TO STEP 13 

11. CONDUCT BASIC INSPECTION 

    Result

    Result	Proceed to
    Malfunctioning parts not confirmed.	A
    Malfunctioning parts confirmed.	B

    B → GO TO STEP 15 

    A: Go to next step 

12. CHECK ECU POWER SOURCE CIRCUIT 

    NEXT: Go to next step 

13. CONDUCT CIRCUIT INSPECTION 

    Result

    Result	Proceed to
    Malfunction not confirmed.	A
    Malfunction confirmed.	B

    B → GO TO STEP 16 

    A: Go to next step 

14. CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS  

    NEXT → GO TO STEP 16 

15. CONDUCT PARTS INSPECTION 

    NEXT: Go to next step 

16. IDENTIFY PROBLEM 

    NEXT: Go to next step 

17. ADJUST AND/OR REPAIR 

    NEXT: Go to next step 

18. CONDUCT CONFIRMATION TEST 

    NEXT → END