How To Proceed With Troubleshooting

HINT

• Use the following procedure to troubleshoot the smart access system with push-button start
• * Using the Techstream

1. VEHICLE BROUGHT TO WORKSHOP 
2. CUSTOMER PROBLEM ANALYSIS 

   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 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 
   1. Measure the 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 Techstream to check if the Multiplex Communication System (MPX) is functioning normally (See DIAGNOSTIC TROUBLE CODE CHART )

      Result 

      RESULT REFERENCE
      
      

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

   A: Go to DIAGNOSTIC TROUBLE CODE CHART  (See DIAGNOSTIC TROUBLE CODE CHART )

   B: Go to next Step 

5. INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM (LIN)* 
   1. Use the Techstream to check if the LIN communication system (LIN) is functioning normally (See DIAGNOSIS SYSTEM )

      Result 

      RESULT REFERENCE
      
      

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

   A: Go to DIAGNOSTIC TROUBLE CODE CHART  (See DIAGNOSTIC TROUBLE CODE CHART )

   B: Go to next Step 

6. CHECK FOR DTC* 
   1. Check for DTCs and note any codes that are output
   2. Recheck for DTCs Based on the DTCs output, try to cause the same steering lock system DTC, engine immobilizer system DTC, wireless door lock control system DTC or smart access system with push-button start (start function) DTC to be output by simulating the symptoms indicated by the DTCs.

      Result 

      RESULT REFERENCE
      
      

      Result	Proceed to
      Steering lock system DTC is output	A
      Engine immobilizer system DTC is output.	B
      Wireless door lock control system DTC is output	C
      Smart access system with push-button start (start function) DTC is output	D
      DTC is not output	E

   A: Go to DIAGNOSTIC TROUBLE CODE CHART  (See DIAGNOSTIC TROUBLE CODE CHART )

   B: Go to DIAGNOSTIC TROUBLE CODE CHART 

   C: Go to DIAGNOSTIC TROUBLE CODE CHART  (See DIAGNOSTIC TROUBLE CODE CHART )

   D: Go to DIAGNOSTIC TROUBLE CODE CHART 

   E: Go to next Step 

7. PROBLEM SYMPTOMS TABLE 
   1. Refer to PROBLEM SYMPTOMS TABLE 

      Result 

      RESULT REFERENCE
      
      

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

   A: Go to step  9

   B: Go to next Step 

8. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. Operation Check (See OPERATION CHECK  )
   2. Data List/Active Test (See DATA LIST / ACTIVE TEST  )
   3. Terminals of ECU (See TERMINALS OF ECU  ).
9. REPAIR OR REPLACE 
10. CONFIRMATION TEST 

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