Engine Immobiliser System (W/O Smart Key System) 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

  3. INSPECT BATTERY VOLTAGE

  4. CRANK ENGINE FOR MORE THAN 10 SECONDS

  5. CHECK FOR DTC*

  6. READ VALUE USING TECHSTREAM*

  7. PROBLEM SYMPTOMS TABLE

  8. OVERALL ANALYSIS AND TROUBLESHOOTING*

  9. ADJUST, REPAIR OR REPLACE

  10. CONFIRMATION TEST

Engine Immobiliser System (W/O Smart Key System) -- How To Proceed With Troubleshooting


HINT:
Use the following procedure to troubleshoot the engine immobiliser system.
*: Using the Techstream.


1.VEHICLE BROUGHT TO WORKSHOP

    NEXT


    2.CUSTOMER PROBLEM ANALYSIS
      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.CRANK ENGINE FOR MORE THAN 10 SECONDS

      NEXT


      5.CHECK FOR DTC*

      1. Check for DTCs and note any codes that are output.

      2. Clear the DTCs.

      3. Recheck for DTCs. Try to duplicate the DTCs (SFI system or ECD system and engine immobiliser system) by simulating the symptoms indicated by the DTCs.

        Result:

        Result
        		Proceed to
        DTC (SFI system) recurs (for 2ZR-FE)
        		A
        DTC (SFI system) recurs (for 2AZ-FE)
        		B
        DTC (engine immobiliser system) recurs
        		C
        DTC does not recur
        		D


      		A.
      Go to DIAGNOSTIC TROUBLE CODE CHART (COROLLA_ZRE142 RM000000PDF0G8X.html)

      		B.
      Go to DIAGNOSTIC TROUBLE CODE CHART (COROLLA_ZRE142 RM000000PDF0G9X.html)

      		C.
      Go to DIAGNOSTIC TROUBLE CODE CHART (COROLLA_ZRE142 RM00000292H03QX.html)
      D


      6.READ VALUE USING TECHSTREAM*

      1. Connect the Techstream to the DLC3.

      2. Turn the ignition switch to ON.

      3. Turn the Techstream on.

      4. Enter the following menus: Body Electrical / Immobiliser / Data List.

      5. Read the Data List according to the display on the Techstream.

        Immobiliser (Transponder Key ECU Assembly)
        Tester Display
        		Measurement Item/Range
        		Normal Condition
        		Diagnostic Note
        Key SW
        		Unlock warning switch signal/ON or OFF
        		ON: Key is in ignition key cylinder
        OFF: No key is in ignition key cylinder
        		-

        OK:
        On the Techstream screen, the item changes between ON and OFF according to the chart above.


      		NG.
      Go to DTC B2780 (COROLLA_ZRE142 RM000001GV003YX.html)
      OK


      7.PROBLEM SYMPTOMS TABLE

      1. Refer to Problem Symptoms Table (Link).


        2. 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


      8.OVERALL ANALYSIS AND TROUBLESHOOTING*

      1. Data List / Active Test (COROLLA_ZRE142 RM000001GVA02UX.html)

      2. Terminals of ECU (COROLLA_ZRE142 RM000001GUS037X.html)


      NEXT


      9.ADJUST, REPAIR OR REPLACE

        NEXT


        10.CONFIRMATION TEST

          NEXT

          END