How To Proceed With Troubleshooting

DOOR LOCK: SMART KEY SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

HINT
* Use the following procedures to troubleshoot the smart key system.
* Techstream can be used in steps 4, 5 and 7.
* When troubleshooting the smart key system using Techstream with the engine switch off, connect 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 between ON and OFF should be less than 1.5 sec.).

1. VEHICLE BROUGHT TO WORKSHOP

NEXT -- Continue 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:






NEXT -- Continue 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 -- Continue to next step.

4. INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM

(a) Use Techstream to check if the CAN Communication System is functioning normally How to Proceed With Troubleshooting.

Result:





B -- GO TO CAN COMMUNICATION SYSTEM
A -- Continue to next step.

5. CHECK FOR DTC

(a) Check for DTCs and note any codes that are output Door Lock - Smart Key System.

(b) Delete the DTCs.

(c) Recheck for DTCs.

Result:





B -- GO TO DIAGNOSTIC TROUBLE CODE CHART
A -- Continue to next step.

6. PROBLEM SYMPTOMS TABLE

NEXT -- Continue to next step.

7. OVERALL ANALYSIS AND TROUBLESHOOTING

(a) ON-VEHICLE INSPECTION On-Vehicle Inspection

(b) DATA LIST/ACTIVE TEST Door Lock - Smart Key System

(c) TERMINALS OF ECU Door Lock - Smart Key System

NEXT -- Continue to next step.

8. REPAIR OR REPLACEMENT

NEXT -- Continue to next step.

9. CONFIRMATION TEST

NEXT -- END