How To Proceed With Troubleshooting

HINT:

• Use the following procedures to troubleshoot the pushbutton start function.
• Techstream should be used in steps  4,  5 and  8.

1. VEHICLE BROUGHT TO WORKSHOP 
2. CUSTOMER PROBLEM ANALYSIS CHECK 

   HINT:

   • In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
   • Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
   • The following 5 items are important points in the problem analysis:
   PROBLEM SYMPTOMS REFERENCE
   
   

   What	Vehicle model, system name
   When	Date, time, occurrence frequency
   Where	Road conditions
   Under what conditions?	Running conditions, driving conditions, weather conditions
   How did it happen?	Problem symptoms

3. INSPECT BATTERY VOLTAGE 

   Standard voltage: 

   11 to 14 V 

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

4. INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM 
   1. Use Techstream to check if the CAN Communication System is functioning normally (See HOW TO PROCEED WITH TROUBLESHOOTING ).

      Result 

   RESULT REFERENCE
   
   

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

   B:  Go to CAN COMMUNICATION SYSTEM 1

   A: Go to Next Step 

5. CHECK FOR DTC 
   1. Check for DTCs and note any codes that are output (See DTC CHECK / CLEAR ).
   2. Delete DTCs.
   3. Recheck for DTCs.

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   DTC does not reoccur	A
   DTC reoccurs	B

   B:  Go to DIAGNOSTIC TROUBLE CODE CHART 

   A: Go to Next Step 

6. INSPECT BASIC OPERATION 
   1. Turn the power switch on (READY) and check that the HV control system starts normally. Make sure the brake pedal is depressed and the shift position is P at this time.
   2. Check that the power switch mode can be changed by pushing the power switch.

      HINT:

      Without depressing the brake pedal, push the power switch repeatedly. Power switch mode should turn from off to on (ACC) to on (IG) and back to off.

      With the brake pedal depressed, push the power switch repeatedly. Power switch mode should turn to on (READY) from any status.

   OK: 

   HV control system can be on (READY) normally. 

7. PROBLEM SYMPTOMS TABLE 

   Result 

   RESULT REFERENCE
   
   

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

   B:  Go to step  9

   A: Go to Next Step 

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

    NEXT: END