How To Proceed With Troubleshooting

HINT: 

• Use the following procedures to troubleshoot the smart access system with push-button start.
• The Techstream can be used in steps 4 and 6.
• When troubleshooting the smart access system with push-button start using the Techstream with the engine switch off, connect the Techstream 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 

   NEXT: Go to next step 

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

   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

   NEXT: Go to next step 

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.

   NEXT: Go to 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. Refer to DTC CHECK / CLEAR .

      Result

      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. Refer to DTC CHECK / CLEAR .
   2. Delete the DTCs.
   3. Recheck for DTCs.
      RESULT
      
      

      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 

   NEXT: Go to next step 

7. OVERALL ANALYSIS AND TROUBLESHOOTING 
   1. On-vehicle inspection. Refer to ON-VEHICLE INSPECTION
   2. DATA LIST/ACTIVE TEST. Refer to DATA LIST / ACTIVE TEST 
   3. Terminals of ECU. Refer to TERMINALS OF ECU 

      NEXT: Go to next step 

8. REPAIR OR REPLACEMENT 

   NEXT: Go to next step 

9. CONFIRMATION TEST 

   NEXT → END