How To Proceed With Troubleshooting

HINT:

• Use the following procedures to troubleshoot the smart access system with push-button start.
• The intelligent tester can be used in steps  4 and  6.
• When troubleshooting the smart access system with push-button start 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 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 REFERENCE 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 MULTIPLEX COMMUNICATION SYSTEM (BEAN) 
   1. Use the intelligent tester to check if the Multiplex Communication System (MPX) is functioning normally (See DTC CHECK/CLEAR ).

      Result 

      COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN)
      
      

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

   B: Go to  MULTIPLEX 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 

      DTC 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 DTC CHECK / CLEAR 
   3. See TERMINALS OF ECU 
8. REPAIR OR REPLACEMENT 
9. CONFIRMATION TEST 

   NEXT: END