ENTRY AND START SYSTEM (for Entry Function) > HOW TO PROCEED WITH TROUBLESHOOTING

for Preparation Click here

HINT:

1. Use these procedures to troubleshoot the entry and start system (for Entry Function).
   
2. *: Use the intelligent tester.
   

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HINT:

1. 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.
   
2. Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
   
3. The following 5 items are important points for problem analysis:
   
   

   What?	Vehicle model, system name
   When?	Date, time, occurrence frequency. Does it occur recently or for a long time?
   Where?	Does it occur at specified place?
   Under what conditions?	Unlock/lock the door, power switch on (IG), hybrid system start.
   How did it happen?	Problem symptoms*

1. *: 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 power switch is pressed [does not turn on (ACC)].
   
7. If the hybrid control system does not start with the push start function.
   
8. If the wireless answer-back buzzer (except for Europe) and outside warning buzzers do not sound.
   
9. Did you try to hybrid control system start by put the electrical key direct on the power switch and press the power switch on (IG).
   
10. If the interior warning buzzers do not sound.
    
11. Any other details concerning the problem.
    
2. If it is supposed 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 when the key was even right by 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 key is bundled together with other items.
   
6. If the key is carried together with other electronic devices, such as cell phones, personal computers, portable music players, other electrical keys, etc. (keep the key at least 0.1 m (0.33 ft.) away from such items).
   
7. Where the key is being kept when not in use:
   Whether or not the key 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 key battery was last replaced (when the battery is low).
   The key battery can be checked roughly using the "Key Low Battery" item in the Data List (Click here).
   
10. If the customer installed any optional components (theft deterrent devices, wireless fog lights, etc.) to the vehicle.
    

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1. Measure the auxiliary battery voltage with the power switch off.
   

Standard voltage:

11 to 14 V


If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.

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1. Use the intelligent tester to check if the CAN communication system is functioning normally (Click here).
   

   Result 

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

B.	GO TO CAN COMMUNICATION SYSTEM (Click here)
A

1. Use the intelligent tester to check if the LIN communication system is functioning normally (Click here).
   

   Result 

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

B.	GO TO LIN COMMUNICATION SYSTEM (Click here)
A

1. Use the intelligent tester to check if the wireless door lock control system is functioning normally.
   

   Result 

   Result	Proceed to
   Wireless door lock control system DTC is not output	A
   Wireless door lock control system DTC is output	B

B.	GO TO WIRELESS DOOR LOCK CONTROL SYSTEM (Click here)
A

1. Recheck for DTCs (Click here). Based on the DTCs output, proceed each system's DTC procedure.
   

   Result 

   Result	Proceed to
   DTC is not output	A
   Engine immobiliser system DTC is output	B
   Entry and Start System (for Entry Function) DTC is output	C

B.	GO TO ENGINE IMMOBILISER SYSTEM (Click here)
C.	GO TO DIAGNOSTIC TROUBLE CODE CHART (Click here)
A

1. Refer to Problem Symptoms Table (Click here).
   

   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 10
A

1. Operation Check (Click here).
   

2. Check Data List / Active Test (Click here).
   

3. Check Terminals of ECU (Click here).
   

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1. Clear the DTCs (Click here).
   

2. Check for DTCs (Click here).
   

   HINT:

   Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure (Click here).

   Result 

   Result	Proceed to
   DTC is not output	A
   Entry and start system (for Entry Function) DTC is output	B

B.	GO TO DIAGNOSTIC TROUBLE CODE CHART (Click here)
A
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