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

  1. CHECK TRANSPONDER KEY ECU ASSEMBLY

    B371191N01

    1. Disconnect the E24 transponder key ECU assembly connector.

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

      Tip:

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

      Terminal No. (Symbol)

      Input/Output

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      Related Data List Item/DTC

      E24-1 (+B) - E24-5 (GND)

      Input

      R - W-B

      Battery

      Always

      11 to 14 V

      +B

      E24-2 (IG) - E24-5 (GND)

      Input

      B - W-B

      Ignition switch signal

      Ignition switch off

      Below 1 V

      IG SW

      Ignition switch ON

      11 to 14 V

      E24-5 (GND) - Body ground

      -

      W-B - Body ground

      Ground

      Always

      Below 1 Ω

      -

    3. Reconnect the E24 transponder key ECU assembly connector.

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

      Terminal No. (Symbol)

      Input/Output

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      Related Data List Item/DTC

      E24-9 (D) - E24-5 (GND)

      Input/Output

      W - W-B

      DLC3 communication

      Without communication

      Below 1 V

      -

      During communication

      Pulse generation

      E24-4 (ANT1) - E24-5 (GND)

      Input/Output

      L - W-B

      Transponder key amplifier power source

      No door control transmitter assembly in ignition key cylinder

      4 to 6 V

      -

      Within 3 seconds of ignition switch turned to ON

      Pulse generation

      (See waveform 1)

      E24-15 (ANT2) - E24-5 (GND)

      Input/Output

      LG - W-B

      Transponder key amplifier communication signal

      No door control transmitter assembly in ignition key cylinder

      4 to 6 V

      -

      Within 3 seconds of ignition switch turned to ON

      Pulse generation

      (See waveform 2)

      E24-12 (EFII) - E24-5 (GND)

      Input

      GR - W-B

      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)

      -

      E24-13 (EFIO) - E24-5 (GND)

      Output

      V - W-B

      ECM output signal

      Ignition switch off

      Below 1 V

      -

      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 4)

      -

    5. Using an oscilloscope, check the waveform.

      1. Waveform 1 (Reference)

        B329909N02
        Table 1. Measurement Condition

        Item

        Content

        Tester Connection

        E24-4 (ANT1) - E24-5 (GND)

        Tool Setting

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

        Condition

        Within 3 seconds of ignition switch turned to ON

      2. Waveform 2 (Reference)

        B329910N02
        Table 2. Measurement Condition

        Item

        Content

        Tester Connection

        E24-15 (ANT2) - E24-5 (GND)

        Tool Setting

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

        Condition

        Within 3 seconds of ignition switch turned to ON

      3. Waveform 3 (Reference)

        B325134C02

        *a

        Approximately 160 ms

        *b

        Approximately 270 ms
        Table 3. Measurement Condition

        Item

        Content

        Tester Connection

        E24-12 (EFII) - E24-5 (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)

        B333259C01

        *a

        Approximately 160 ms

        *b

        Approximately 270 ms
        Table 4. Measurement Condition

        Item

        Content

        Tester Connection

        E24-13 (EFIO) - E24-5 (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

  2. CHECK ECM (for 1KR-FE)

    A247842N40

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

      Terminal No. (Symbol)

      Input/Output

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      Related Data List Item / DTC

      A34-4 (E1) - Body ground

      -

      W-B - Body ground

      Ground

      Always

      Below 1 Ω

      -

      A34-5 (E01) - Body ground

      -

      W-B - Body ground

      Ground

      Always

      Below 1 Ω

      -

      A34-17 (E02) - Body ground

      -

      W-B - Body ground

      Ground

      Always

      Below 1 Ω

      -

      A34-15 (BATT) - A34-4 (E1)

      Input

      SB - W-B

      Battery (for measuring battery voltage and for ECM memory)

      Always

      11 to 14 V

      -

      A34-1 (+B1) - A34-4 (E1)

      Input

      B - W-B

      Power source of ECM

      Ignition switch ON

      11 to 14 V

      -

      A34-2 (+B) - A34-4 (E1)

      Input

      B - W-B

      Power source of ECM

      Ignition switch ON

      11 to 14 V

      -

      A34-43 (IMO) - A34-4 (E1)

      Output

      GR - W-B

      Transponder key ECU assembly communication output

      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)

      -

      A34-42 (IMI) - A34-4 (E1)

      Input

      V - W-B

      Transponder key ECU assembly communication input

      Ignition switch off

      Below 1 V

      -

      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 2)

      -

    2. Using an oscilloscope, check the waveform.

      1. Waveform 1 (Reference)

        B333258C01

        *a

        Approximately 160 ms

        *b

        Approximately 270 ms

        Tester Connection

        A34-43 (IMO) - A34-4 (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)

        B333259C01

        *a

        Approximately 160 ms

        *b

        Approximately 270 ms

        Tester Connection

        A34-42 (IMI) - A34-4 (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
  3. B374446N01

    CHECK ECM (for 1PP)

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

      Terminal No. (Symbol)

      Input/Output

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      Related Data List Item / DTC

      A35-53 (GND1) - Body ground

      -

      W-B - Body ground

      Ground

      Always

      Below 1 Ω

      -

      A35-4 (GND2) - Body ground

      -

      W-B - Body ground

      Ground

      Always

      Below 1 Ω

      -

      A35-3 (GND3) - Body ground

      -

      W-B - Body ground

      Ground

      Always

      Below 1 Ω

      -

      A35-5 (+B1) - A35-53 (GND1)

      Input

      B - W-B

      Power source of ECM

      Ignition switch ON

      11 to 14 V

      -

      B56-18 (IMO) - A35-53 (GND1)

      Output

      GR - W-B

      Transponder key ECU assembly communication output

      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)

      -

      B56-19 (IMI) - A35-53 (GND1)

      Input

      V - W-B

      Transponder key ECU assembly communication input

      Ignition switch off

      Below 1 V

      -

      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 2)

      -

    2. Using an oscilloscope, check the waveform.

      1. Waveform 1 (Reference)

        B333258C01

        *a

        Approximately 160 ms

        *b

        Approximately 270 ms

        Tester Connection

        B56-18 (IMO) - A35-53 (GND1)

        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)

        B333259C01

        *a

        Approximately 160 ms

        *b

        Approximately 270 ms

        Tester Connection

        B56-19 (IMI) - A35-53 (GND1)

        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