IMMOBILISER SYSTEM(w/o Smart Entry and Start System) Engine does not Start but Initial Combustion Occurs

DESCRIPTION

If the key ID codes of the door control transmitter assembly and transponder key ECU assembly match, the immobiliser system is unset and the engine start permission signal is sent to the ECM. When the ID codes of the transponder key ECU assembly and ECM match, the engine starts.

WIRING DIAGRAM

B00877JE09

CAUTION / NOTICE / HINT

Note

If the transponder key ECU assembly or ECM is replaced, refer to Service Bulletin.

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs. (for 2AR-FE)


      Body Electrical > Immobiliser > Clear DTCs
      Powertrain > Engine and ECT > Clear DTCs

    2. Clear the DTCs. (for A25A-FKS)


      Body Electrical > Immobiliser > Clear DTCs
      Powertrain > Engine > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  2. CHECK FOR DTC


    1. Check for DTCs. (for 2AR-FE)


      Body Electrical > Immobiliser > Trouble Codes
      Powertrain > Engine and ECT > Trouble Codes

    2. Check for DTCs. (for A25A-FKS)


      Body Electrical > Immobiliser > Trouble Codes
      Powertrain > Engine > Trouble Codes
      Result
      Result Proceed to
      DTCs are not output (for 2AR-FE) A
      DTCs are not output (for A25A-FKS) B
      DTCs are output C

    A

    GO TO STEP 4 Click here

    C

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    B

  3. READ VALUE USING GTS (IMMOBILISER FUEL CUT STARTS)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List.

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


      Powertrain > Engine > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Immobiliser Fuel Cut Status Status of immobiliser system fuel cut ON or OFF - -

      Powertrain > Engine > Data List
      Tester Display
      Immobiliser Fuel Cut Status
      OK
      OFF is displayed after the engine is started.
      Result
      Proceed to
      OK
      NG

    OK

    GO TO SFI SYSTEM Click here

    NG

  4. CHECK WHETHER ENGINE STARTS


    1. Using a registered door control transmitter assembly, turn the ignition switch to ON.

    2. Check that the engine starts 5 seconds after the ignition switch was turned to ON.

      OK
      Engine starts normally.
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  5. INSPECT TRANSPONDER KEY ECU ASSEMBLY (TERMINAL EFIO)


    1. Using an oscilloscope, check the waveform.

      B0084VBC03
      *a

      Component with harness connected

      (Transponder Key ECU Assembly)

      		 *b Waveform
      *c Waveform (detail) *d Approximately 40 ms
      *e Approximately 60 ms - -
      OK
      Tester Connection Condition Tool Setting Specified Condition
      K60-11 (EFIO) - Body ground Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal 2 V/DIV., 500 ms./DIV.

      Pulse generation

      (See waveform)
      Result
      Result Proceed to
      Normal waveform A
      Waveform not output, or has abnormal wavelength or shape B

    B

    CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - ECM) Click here

    A

  6. INSPECT TRANSPONDER KEY ECU ASSEMBLY (TERMINAL EFII)


    1. Using an oscilloscope, check the waveform.

      B00842RC02
      *a

      Component with harness connected

      (Transponder Key ECU Assembly)

      		 *b Waveform
      *c Approximately 160 ms. *d Approximately 270 ms.
      OK
      Tester Connection Condition Tool Setting Specified Condition
      K60-10 (EFII) - Body ground Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal 2 V/DIV., 500 ms./DIV.

      Pulse generation

      (See waveform)
      Result
      Result Proceed to
      Normal waveform A
      Waveform not output, or has abnormal wavelength or shape B

    B

    REPLACE ECM for 2AR-FE: Click here
    REPLACE ECM for A25A-FKS: Click here

    A

  7. INSPECT TRANSPONDER KEY ECU ASSEMBLY (TERMINAL EFIO)


    1. Using an oscilloscope, check the waveform.

      B0087ELC02
      *a

      Component with harness connected

      (Transponder Key ECU Assembly)

      		 *b Waveform
      *c Approximately 160 ms. *d Approximately 270 ms.
      OK
      Tester Connection Condition Tool Setting Specified Condition
      K60-11 (EFIO) - Body ground Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal 2 V/DIV., 500 ms./DIV.

      Pulse generation

      (See waveform)
      Result
      Result Proceed to
      Normal waveform A
      Waveform not output, or has abnormal wavelength or shape B

    B

    REPLACE TRANSPONDER KEY ECU ASSEMBLY

    A

  8. REGISTER ECU COMMUNICATION ID


    1. Register the communication ID between the transponder key ECU assembly and ECM.

      Result
      Proceed to
      NEXT

    NEXT

  9. CHECK WHETHER ENGINE STARTS


    1. Using a registered door control transmitter assembly, turn the ignition switch to ON.

    2. Check that the engine starts 5 seconds after the ignition switch was turned to ON.

      OK
      Engine starts normally.
      Result
      Result Proceed to
      Engine can be started A
      Engine cannot be started B

    A

    END (REGISTERED COMMUNICATION ID WAS DEFECTIVE)

    B

    REPLACE TRANSPONDER KEY ECU ASSEMBLY

  10. CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - ECM)


    1. Disconnect the K60 transponder key ECU assembly connector.

    2. Disconnect the A22*1 or A24*2 ECM connector.


      • *1: for 2AR-FE

      • *2: for A25A-FKS

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      for 2AR-FE
      Tester Connection Condition Specified Condition
      K60-11 (EFIO) - A22-28 (IMI) Always Below 1 Ω
      K60-11 (EFIO) or A22-28 (IMI) - Other terminals and body ground Always 10 kΩ or higher
      for A25A-FKS
      Tester Connection Condition Specified Condition
      K60-11 (EFIO) - A24-26 (IMI) Always Below 1 Ω
      K60-11 (EFIO) or A24-26 (IMI) - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TRANSPONDER KEY ECU ASSEMBLY

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR