Smart Key System (For Entry Function) How To Proceed With Troubleshooting

Vehicle Interior. Corolla. Zre142 Aze141
Theft Deterrent Keyless Entry. Corolla. Zre142 Aze141

  1. VEHICLE BROUGHT TO WORKSHOP

  2. CUSTOMER PROBLEM ANALYSIS CHECK

  3. INSPECT BATTERY VOLTAGE

  4. INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM (CAN)*

  5. INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM (LIN)*

  6. CHECK DTC OUTPUT*

  7. PROBLEM SYMPTOMS TABLE

  8. OVERALL ANALYSIS AND TROUBLESHOOTING*

  9. REPAIR OR REPLACE

  10. CONFIRMATION TEST

Smart Key System (For Entry Function) -- How To Proceed With Troubleshooting


HINT:
  1. Use the following procedures to troubleshoot the smart key system.
  2. *: Use the Techstream.
  3. When troubleshooting the smart key system 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 Techstream and the vehicle begins (the interval between ON and OFF should be less than 1.5 seconds).


1.VEHICLE BROUGHT TO WORKSHOP

    NEXT


    2.CUSTOMER PROBLEM ANALYSIS CHECK

      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 in the problem analysis:

      What
      		Vehicle model, system name
      When
      		Date, time, occurrence frequency
      Where
      		Road conditions
      Under what conditions?
      		Driving conditions, weather conditions
      How did it happen?
      		Problem symptoms

    NEXT


    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.

    NEXT


    4.INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM (CAN)*

    1. Use the Techstream to check if the CAN communication system is functioning normally.

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


    		A.
    Go to DIAGNOSTIC TROUBLE CODE CHART (COROLLA_ZRE142 RM000000WI60ACX.html)
    B


    5.INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM (LIN)*

    1. Use the Techstream to check if the Multiplex Communication System (MPX) is functioning normally.

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


    		A.
    Go to DIAGNOSTIC TROUBLE CODE CHART (COROLLA_ZRE142 RM000002XHJ04PX.html)
    B


    6.CHECK DTC OUTPUT*

    1. Check for DTCs. Based on the DTCs output, try to cause the same steering lock system DTC, engine immobiliser system DTC, wireless door lock control system DTC or smart key system (for start function) DTC to be output by simulating the symptoms indicated by the DTCs.

      Result:
      Result
      		Proceed to
      Steering lock system DTC is not output.
      		A
      Engine immobiliser system DTC is output.
      		B
      Wireless door lock control system DTC is output.
      		C
      Smart key system (for start function) DTC is output.
      		D
      DTC is not output.
      		E


    		A.
    Go to DIAGNOSTIC TROUBLE CODE CHART (COROLLA_ZRE142 RM000000XWM05GX.html)

    		B.
    Go to DIAGNOSTIC TROUBLE CODE CHART (COROLLA_ZRE142 RM000000QY6060X.html)

    		C.
    Go to DIAGNOSTIC TROUBLE CODE CHART (COROLLA_ZRE142 RM0000026DB04UX.html)

    		D.
    Go to DIAGNOSTIC TROUBLE CODE CHART (COROLLA_ZRE142 RM000000XIZ0EQX.html)
    E


    7.PROBLEM SYMPTOMS TABLE

    1. Refer to Problem Symptoms Table (Link).

      Result:
      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


    8.OVERALL ANALYSIS AND TROUBLESHOOTING*

    1. Operation Check (COROLLA_ZRE142 RM000002U9W05EX.html)

    2. Data List / Active Teat (COROLLA_ZRE142 RM000000XUF08IX.html)

    3. Terminals of ECU (COROLLA_ZRE142 RM000000XUA08WX.html)


    NEXT


    9.REPAIR OR REPLACE

      NEXT


      10.CONFIRMATION TEST

        NEXT

        END