IMMOBILISER SYSTEM(w/o Entry and Start System) TERMINALS OF ECU


  1. CHECK TRANSPONDER KEY ECU ASSEMBLY

    A012L08N03

    1. Disconnect the E21 transponder key ECU assembly connector.

    2. Measure the resistance and voltage according to the value(s) in the table below.

      Tech Tips

      Measure the values on the wire harness side with the connector disconnected.

      Tester Connection Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item
      E21-1 (+B) - E21-5 (GND) Input W - BR Battery Always 11 to 14 V +B
      E21-2 (IG) - E21-5 (GND) Input B - BR Ignition switch signal Ignition switch off Below 1 V IG SW
      Ignition switch ON 11 to 14 V
      E21-3 (KSW) - E21-5 (GND) Input V - BR Unlock warning switch signal No key in ignition key cylinder 10 kΩ or higher Key SW/B2780
      Key in ignition key cylinder Below 1 Ω
      E21-5 (GND) - Body ground - BR - Body ground Ground Always Below 1 Ω -

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the E21 transponder key ECU assembly connector.

    4. Measure the voltage and check for pulses according to the value(s) in the table below.

      Tester Connection Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item
      E21-8 (IND) - E21-5 (GND) Output Y - BR Security indicator signal No key in ignition key cylinder, or 20 sec. elapsed after turning ignition switch to ACC or off (immobiliser system set) Pulse generation Immobiliser
      Key in ignition key cylinder (immobiliser system unset) Below 1 V
      E21-9 (D) - E21-5 (GND) Input/Output LG - BR DLC3 communication Without communication Below 1 V -
      During communication Pulse generation
      E21-4 (ANT1) - E21-5 (GND) Input/Output V - BR Transponder key amplifier power source No key in ignition key cylinder 4 to 6 V -
      Within 3 seconds of inserting key into ignition key cylinder

      Pulse generation

      (See waveform 1)
      E21-15 (ANT2) - E21-5 (GND) Input/Output W - BR Transponder key amplifier communication signal No key in ignition key cylinder 4 to 6 V -
      Within 3 seconds of inserting key into ignition key cylinder

      Pulse generation

      (See waveform 2)
      E21-12 (EFII) - E21-5 (GND) Output LG - BR ECM input signal 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

      Pulse generation

      (See waveform 3)

      		 -
      E21-13 (EFIO) - E21-5 (GND) Input P - BR ECM output signal Ignition switch off Below 1 V -
      Ignition switch ON

      Pulse generation

      (See waveform 4)

      If the result is not as specified, the transponder key ECU assembly may be malfunctioning.

    5. Using an oscilloscope, check the waveform.


      1. Waveform 1 (Reference)

        A012GREN02
        Tester Connection E21-4 (ANT1) - E21-5 (GND)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of inserting key into ignition key cylinder

      2. Waveform 2 (Reference)

        A012N5SN02
        Tester Connection E21-15 (ANT2) - E21-5 (GND)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of inserting key into ignition key cylinder

      3. Waveform 3 (Reference)

        A012MOUC02
        *a Approximately 160 ms *b Approximately 270 ms
        Tester Connection E21-12 (EFII) - E21-5 (GND)
        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

      4. Waveform 4 (Reference)

        A012KTSC01
        *a Approximately 160 ms *b Approximately 270 ms
        Tester Connection E21-13 (EFIO) - E21-5 (GND)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Ignition switch ON

  2. CHECK ECM (for 1ZR-FE, 2ZR-FE, 1NR-FE or 1ZR-FAE)

    A012HCAN02
    Tester Connection Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item
    B31-16 (E1) - Body ground - BR - Body ground Ground Always Below 1 Ω -
    B31-51 (E01) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
    B31-21 (E02) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
    A50-1 (BATT) - B31-16 (E1) Input P - BR +B power supply Always 11 to 14 V -
    A50-3 (+B2) - B31-16 (E1) Input B - BR +B power supply Ignition switch ON 11 to 14 V -
    A50-2 (+B) - B31-16 (E1) Input B - BR +B power supply Ignition switch ON 11 to 14 V -
    A50-29 (IMO) - B31-16 (E1) Input LG - BR Transponder key ECU assembly communication input 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

    Pulse generation

    (See waveform 1)

    		 -
    A50-28 (IMI) - B31-16 (E1) Output P - BR Transponder key ECU assembly communication output Ignition switch off Below 1 V -
    Ignition switch ON

    Pulse generation

    (See waveform 2)

    		 -

    1. Using an oscilloscope, check the waveform.


      1. Waveform 1 (Reference)

        A012L1UC01
        *a Approximately 160 ms *b Approximately 270 ms
        Tester Connection A50-29 (IMO) - B31-16 (E1)
        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

      2. Waveform 2 (Reference)

        A012KTSC01
        *a Approximately 160 ms *b Approximately 270 ms
        Tester Connection A50-28 (IMI) - B31-16 (E1)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Ignition switch ON

  3. CHECK ECM (for 1ND-TV)

    A012L9NN02
    Tester Connection Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item
    A101-2 (E1) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
    A101-23 (BATT) - A101-2 (E1) Input W - W-B +B power supply Always 11 to 14 V -
    A101-61 (+B2) - A101-2 (E1) Input B - W-B +B power supply Ignition switch ON 11 to 14 V -
    A101-1 (+B) - A101-2 (E1) Input B - W-B +B power supply Ignition switch ON 11 to 14 V -
    A101-78 (IMO) - A101-2 (E1) Input LG - W-B Transponder key ECU assembly communication input 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

    Pulse generation

    (See waveform 1)

    		 -
    A101-77 (IMI) - A101-2 (E1) Output P - W-B Transponder key ECU assembly communication output Ignition switch off Below 1 V -
    Ignition switch ON

    Pulse generation

    (See waveform 2)

    		 -

    1. Using an oscilloscope, check the waveform.


      1. Waveform 1 (Reference)

        A012L1UC01
        *a Approximately 160 ms *b Approximately 270 ms
        Tester Connection A101-78 (IMO) - A101-2 (E1)
        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

      2. Waveform 2 (Reference)

        A012KTSC01
        *a Approximately 160 ms *b Approximately 270 ms
        Tester Connection A101-77 (IMI) - A101-2 (E1)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Ignition switch ON

  4. CHECK ECM (for 1AD-FTV)

    A012L8IN03
    Tester Connection Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item
    B164-109 (E1) - Body ground - BR - Body ground Ground Always Below 1 Ω -
    B164-45 (E01) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
    B164-44 (E02) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
    A118-2 (BATT) - B164-109 (E1) Input W - BR +B power supply Always 11 to 14 V -
    A118-20 (+B2) - B164-109 (E1) Input B - BR +B power supply Ignition switch ON 11 to 14 V -
    A118-1 (+B) - B164-109 (E1) Input B - BR +B power supply Ignition switch ON 11 to 14 V -
    A118-15 (IMO) - B164-109 (E1) Input LG - BR Transponder key ECU assembly communication input 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

    Pulse generation

    (See waveform 1)

    		 -
    A118-16 (IMI) - B164-109 (E1) Output P - BR Transponder key ECU assembly communication output Ignition switch off Below 1 V -
    Ignition switch ON

    Pulse generation

    (See waveform 2)

    		 -

    1. Using an oscilloscope, check the waveform.


      1. Waveform 1 (Reference)

        A012L1UC01
        *a Approximately 160 ms *b Approximately 270 ms
        Tester Connection A118-15 (IMO) - B164-109 (E1)
        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

      2. Waveform 2 (Reference)

        A012KTSC01
        *a Approximately 160 ms *b Approximately 270 ms
        Tester Connection A118-16 (IMI) - B164-109 (E1)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Ignition switch ON