How To Proceed With Troubleshooting

HINT:

• Use the following procedure to troubleshoot the smart key system.
• The intelligent tester can be used in steps  4,  5 and  7.
• When troubleshooting the smart key system using the intelligent tester with the engine switch off, connect the intelligent tester to the vehicle and repeat turning any of the courtesy light switches on and off until communication between the tester and the vehicle begins (the interval between ON and OFF should be less than 1.5 sec).

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 ANALYSIS CHART
     
     

     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 11 V, recharge or replace the battery before proceeding to the next step.

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

      Result 

      RESULT CHART
      
      

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

   B:  GO TO CAN COMMUNICATION SYSTEM

   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 the DTCs.
   3. Recheck for DTCs.

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      DTC does not reoccur	A
      DTC reoccurs	B

   B: GO TO DIAGNOSTIC TROUBLE CODE CHART 

   A: Go to Next Step 

6. PROBLEM SYMPTOMS TABLE 
7. OVERALL ANALYSIS AND TROUBLESHOOTING 
   1. (See ON-VEHICLE INSPECTION  )
   2. (See DATA LIST / ACTIVE TEST  )
   3. (See TERMINALS OF ECU  )
8. REPAIR OR REPLACEMENT 
9. CONFIRMATION TEST 

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