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

DTC Code DTC Name
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

B506729E02

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.

      Powertrain > Engine and ECT > Clear DTCs

      Body Electrical > Immobiliser > Clear DTCs

    Result

    Proceed to

    NEXT
    NEXT

  2. CHECK FOR DTC

    1. Check for DTCs.

      Powertrain > Engine and ECT > Trouble Codes

      Body Electrical > Immobiliser > Trouble Codes

    Result

    Result

    Proceed to

    DTCs are not output

    A

    DTCs are output

    B
    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART

    Click here

    A

  3. 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

    USE SIMULATION METHOD TO CHECK

    Click here

    B

  4. CHECK ECM (TERMINAL IMI)

    1. Using an oscilloscope, check the waveform.

      B371260C01

      *a

      Component with harness connected

      (ECM)

      *b

      Component with harness connected

      (Transponder Key ECU Assembly)

      *c

      Waveform

      -

      -
      Table 1. OK

      Tester Connection

      Condition

      Tool Setting

      Specified Condition

      A34-42 (IMI) - E24-13 (EFIO)

      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

  5. CHECK ECM (TERMINAL IMO)

    1. Using an oscilloscope, check the waveform.

      B371256C01

      *a

      Component with harness connected

      (ECM)

      *b

      Component with harness connected

      (Transponder Key ECU Assembly)

      *c

      Approximately 160 ms

      *d

      Approximately 270 ms

      *e

      Waveform

      -

      -
      Table 2. OK

      Tester Connection

      Condition

      Tool Setting

      Specified Condition

      A34-43 (IMO) - E24-12 (EFII)

      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

    Click here

    Click here

    A

  6. CHECK ECM (TERMINAL IMI)

    1. Using an oscilloscope, check the waveform.

      B371258C01

      *a

      Component with harness connected

      (ECM)

      *b

      Component with harness connected

      (Transponder Key ECU Assembly)

      *c

      Waveform

      *d

      Approximately 160 ms

      *e

      Approximately 270 ms

      -

      -

      Item

      Content

      Terminal No. (Symbol)

      A34-42 (IMI) - E24-13 (EFIO)

      Tool Setting

      2 V/DIV., 500 ms./DIV.

      Condition

      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

    Result

    Result

    Proceed to

    Normal waveform

    A

    Waveform not output, or has abnormal wavelength or shape

    B
    B

    REPLACE TRANSPONDER KEY ECU ASSEMBLYClick here

    A

  7. REGISTER ECU COMMUNICATION ID

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

      Tip:

      Refer to Service Bulletin.

    Result

    Proceed to

    NEXT
    NEXT

  8. 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

  9. REPLACE TRANSPONDER KEY ECU ASSEMBLY

    1. Replace the transponder key ECU assembly with a new one.

      Tip:

      Refer to Service Bulletin.

      Note:

      Key ID code registration is necessary when replacing the transponder key ECU assembly, refer to Service Bulletin.

    Result

    Proceed to

    NEXT
    NEXT

  10. 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 (TRANSPONDER KEY ECU ASSEMBLY WAS DEFECTIVE)

    B

    GO TO SFI SYSTEM

    Click here

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

    1. Disconnect the E24 transponder key ECU assembly connector.

    2. Disconnect the A34 ECM connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E24-13 (EFIO) - A34-42 (IMI)

      Always

      Below 1 Ω

      A34-42 (IMI) or E24-13 (EFIO) - 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