How To Proceed With Troubleshooting

HINT: 

• Use these procedures to troubleshoot the smart key system (for Entry Function).
• *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP 

   NEXT: Go to next step 

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 for problem analysis:

     What?	Vehicle model, system name
     When?	Date, time, occurrence frequency, whether the problem occurred recently or has been occurring for a long time?
     Where?	Whether the problem occurs at a specific location?
     Under what conditions?	Whether the doors are locked or unlocked, whether the engine switch is on (IG), whether the engine has started.
     How did it happen?	Problem symptoms*

     • *: Be sure to ask the customer in detail about the following points concerning the vehicle operating conditions, environment and problem, and then check for DTCs.
       1. If the entry lock/unlock function does not operate for all doors.
       2. If the entry lock function does not operate.
       3. If the entry unlock function does not operate.
       4. If both the entry lock and unlock functions do not operate.
       5. If the wireless lock and unlock functions do not operate.
       6. If there is no power even when the engine switch is pressed [does not turn on (ACC)].
       7. If the engine does not start with the entry ignition function.
       8. If the outside warning buzzers do not sound.
       9. If the customer attempted to start the engine by touching the electrical key transmitter to the engine switch and pressing the engine switch.
       10. If the steering lock does not unlock.
       11. Any other details concerning the problem.
     • If it is thought that electric wave interference is likely, be sure to ask the customer in detail about the following points concerning the vehicle operating conditions, environment and problem.
       1. Specific locations where the system does not operate (such as near TV towers, large video displays, wireless garage door opener systems, wireless security cameras, home security systems, etc.).
       2. Specific times when the system does not operate:

          Whether or not symptoms occurred immediately after purchase or only recently.

          Whether or not the symptoms occurred even when the electrical key transmitter was near the vehicle (electrical key antenna).

       3. If the system does not operate only when near specific vehicles (there may be an effect from electric waves from the wireless systems of other vehicles).
       4. If the system operates intermittently.
       5. If the electrical key transmitter is bundled together with other items.
       6. If the electrical key transmitter is carried together with other electronic devices, such as cell phones, personal computers, portable music players, other electrical key transmitters, etc. (keep the electrical key transmitter at least 0.1 m (0.33 ft.) away from such items).
       7. Where the electrical key transmitter is being kept when not in use:

          Whether or not the electrical key transmitter is being placed within 1 m (3.28 ft.) of items such as TVs, DVD recorders, induction cookers, rice cookers, dishwashers, modems, cell phones, personal computers, microwave ovens, desk or floor lamps, cordless telephones, etc.

       8. If there are electronic devices that transmit electric waves placed in the vehicle.
       9. When the transmitter battery was last replaced (when the battery is low).

          The transmitter battery can be checked using the "Key Low Battery" item in the Data List. Refer to OPERATION CHECK .

       10. If the customer installed any optional components (theft deterrent devices, wireless fog lights, etc.) to the vehicle.

   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.

   HINT: 

   A simple method to determine whether the battery is depleted is to operate the horn.

   NEXT: Go to next step 

4. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* 
   1. Use the Techstream to check if the CAN communication system is functioning normally. Refer to DIAGNOSIS SYSTEM .
      RESULT
      
      

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

      B → Go to CAN COMMUNICATION SYSTEM. Refer to  DIAGNOSIS SYSTEM 

      A: Go to next step 

5. CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM* 
   1. Use the Techstream to check if the LIN communication system is functioning normally. Refer to DTC CHECK / CLEAR .
      RESULT
      
      

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

      B → Go to LIN COMMUNICATION SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART 

      A: Go to next step 

6. CHECK FOR DTC* 
   1. Recheck for DTCs. Refer to DTC CHECK / CLEAR . Based on the DTCs output, proceed to each system's DTC procedure.
      RESULT
      
      

      Result	Proceed to
      DTC is not output	A
      Steering lock system DTC is output	B
      Engine immobilizer system DTC is output	C
      Smart key system (for Entry Function) DTC is output	D

      B → Go to STEERING LOCK SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART 

      C → Go to ENGINE IMMOBILIZER SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART 

      D → Go to DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART  

      A: Go to next step 

7. PROBLEM SYMPTOMS TABLE 
   1. Refer to Problem Symptoms Table. Refer to PROBLEM SYMPTOMS TABLE .
      RESULT
      
      

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

      B → Go to step   9 

      A: Go to next step 

8. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. Operation Check. Refer to OPERATION CHECK .
   2. Check Data List / Active Test. Refer to DATA LIST / ACTIVE TEST .
   3. Check Terminals of ECU. Refer to TERMINALS OF ECU .

      NEXT: Go to next step 

9. REPAIR OR REPLACEMENT 

   NEXT: Go to next step 

10. CHECK FOR DTC* 
    1. Clear the DTCs. Refer to DTC CHECK / CLEAR .
    2. Check for DTCs. Refer to DTC CHECK / CLEAR .

       HINT: 

       Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure. Refer to DIAGNOSTIC TROUBLE CODE CHART .

       RESULT
       
       

       Result	Proceed to
       DTC is not output	A
       Smart key system (for Entry Function) DTC is output	B

       B → Go to DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART  

       A → END