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


  1. CHECK TRANSPONDER KEY AMPLIFIER

    A01DMR9E08

    1. Disconnect the G75 amplifier connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G75-7 (AGND) - Body ground L - 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 G75 amplifier connector.

    4. Measure the voltage according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G75-1 (VC5) - G75-7 (AGND) R - L Power supply No key in ignition key cylinder Below 1 V
      Key inserted in ignition key cylinder 4.6 to 5.4 V
      G75-4 (CODE) - G75-7 (AGND) LG - L Demodulated signal of key code data No key in ignition key cylinder Below 1 V
      Key inserted in ignition key cylinder Pulse generation (see waveform 1)
      G75-5 (TXCT) - G75-7 (AGND) P - L Key code output signal No key in ignition key cylinder Below 1 V
      Key inserted in ignition key cylinder Pulse generation (see waveform 2)

      If the result is not as specified, the amplifier may have a malfunction.

    5. A01DPN1E27

      Inspect using an oscilloscope.


      1. Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection G75-4 (CODE) - G75-7 (AGND)
        Tool Setting 5 V/DIV., 20 ms./DIV.
        Condition Key inserted in ignition key cylinder
      2. A01DMRHE24

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection G75-5 (TXCT) - G75-7 (AGND)
        Tool Setting 5 V/DIV., 20 ms./DIV.
        Condition Key inserted in ignition key cylinder

  2. CHECK TRANSPONDER KEY ECU ASSEMBLY (for 5L-E)

    A01DOGPE20

    1. Disconnect the G138 ECU connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G138-16 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      G138-1 (+B) - G138-16 (GND) P - W-B Battery Always 11 to 14 V
      G138-2 (IG) - G138-16 (GND) W - W-B Ignition switch Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      G138-3 (KSW) - G138-16 (GND) G - W-B Unlock warning switch No key in ignition key cylinder 10 kΩ or higher
      Key inserted in ignition key cylinder Below 1 Ω

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

    3. Reconnect the G138 ECU connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G138-14 (VC5) - G138-16 (GND) R - W-B Power source No key in ignition key cylinder Below 1 V
      Key inserted in ignition key cylinder 4.6 to 5.4 V
      G138-7 (CTY) - G138-16 (GND)

      R - W-B*1

      B - W-B*2

      		 Front door courtesy light switch (for Driver Side) Driver door closed 10 kΩ or higher
      Driver door open Below 1 Ω
      G138-4 (TXCT) - G138-16 (GND) P - W-B Transponder key amplifier communication signal No key in ignition key cylinder Below 1 V
      Key inserted in ignition key cylinder Pulse generation (see waveform 1)
      G138-15 (CODE) - G138-16 (GND) LG - W-B Transponder key amplifier communication signal No key in ignition key cylinder Below 1 V
      Key inserted in ignition key cylinder Pulse generation (see waveform 2)
      G138-13 (EFIO) - G138-16 (GND) W - W-B ECM output signal Ignition switch off Below 1 V
      Ignition switch ON Pulse generation (see waveform 3)
      G138-12 (EFII) - G138-16 (GND) SB - W-B ECM input signal Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned to ON after battery disconnected and connected Pulse generation (see waveform 4)
      G138-8 (IND) - G138-16 (GND) G - W-B Security indicator light signal Immobiliser set Alternating between 11 to 14 V and below 1 V
      Immobiliser unset Below 1 V
      G138-9 (D) - G138-16 (GND) W - W-B Diagnosis tester communication Always Pulse generation
      G138-5 (AGND) - Body ground L - Body ground Ground Always Below 1 Ω

      • *1: for LHD

      • *2: for RHD

      If the result is not as specified, the ECU may have a malfunction.

    5. A01DMRHE25

      Inspect using an oscilloscope.


      1. Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection G138-4 (TXCT) - G138-16 (GND)
        Tool Setting 5 V/DIV., 20 ms./DIV.
        Condition Key inserted in ignition key cylinder
      2. A01DPN1E28

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection G138-15 (CODE) - G138-16 (GND)
        Tool Setting 5 V/DIV., 20 ms./DIV.
        Condition Key inserted in ignition key cylinder
      3. A01DONWE01

        Waveform 3 (Reference)

        Measurement Condition
        Item Content
        Tester Connection G138-13 (EFIO) - G138-16 (GND)
        Tool Setting 10 V/DIV., 100 ms./DIV.
        Condition Ignition switch ON
      4. A01DPYJE01

        Waveform 4 (Reference)

        Measurement Condition
        Item Content
        Tester Connection G138-12 (EFII) - G138-16 (GND)
        Tool Setting 5 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned to ON after battery disconnected and connected

  3. CHECK TRANSPONDER KEY ECU ASSEMBLY (except 5L-E)

    A01DOGPE19

    1. Disconnect the G74 ECU connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G74-16 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      G74-1 (+B) - G74-16 (GND) P - W-B Battery Always 11 to 14 V
      G74-2 (IG) - G74-16 (GND) W - W-B Ignition switch Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      G74-3 (KSW) - G74-16 (GND) G - W-B Unlock warning switch No key in ignition key cylinder 10 kΩ or higher
      Key inserted in ignition key cylinder Below 1 Ω

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

    3. Reconnect the G74 ECU connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G74-14 (VC5) - G74-16 (GND) R - W-B Power source No key in ignition key cylinder Below 1 V
      Key inserted in ignition key cylinder 4.6 to 5.4 V
      G74-7 (CTY) - G74-16 (GND)

      R - W-B*1

      B - W-B*2

      		 Front door courtesy light switch (for Driver Side) Driver door closed 10 kΩ or higher
      Driver door open Below 1 Ω
      G74-4 (TXCT) - G74-16 (GND) P - W-B Transponder key amplifier communication signal No key in ignition key cylinder Below 1 V
      Key inserted in ignition key cylinder Pulse generation (see waveform 1)
      G74-15 (CODE) - G74-16 (GND) LG - W-B Transponder key amplifier communication signal No key in ignition key cylinder Below 1 V
      Key inserted in ignition key cylinder Pulse generation (see waveform 2)
      G74-13 (EFIO) - G74-16 (GND) W - W-B ECM output signal Ignition switch off Below 1 V
      Ignition switch ON Pulse generation (see waveform 3)
      G74-12 (EFII) - G74-16 (GND) SB - W-B ECM input signal Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned to ON after battery disconnected and connected Pulse generation (see waveform 4)
      G74-8 (IND) - G74-16 (GND) G - W-B Security indicator light signal Immobiliser set Alternating between 11 to 14 V and below 1 V
      Immobiliser unset Below 1 V
      G74-9 (D) - G74-16 (GND) W - W-B Diagnosis tester communication Always Pulse generation
      G74-5 (AGND) - Body ground L - Body ground Ground Always Below 1 Ω

      • *1: for LHD

      • *2: for RHD

      If the result is not as specified, the ECU may have a malfunction.

    5. A01DMRHE25

      Inspect using an oscilloscope.


      1. Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection G74-4 (TXCT) - G74-16 (GND)
        Tool Setting 5 V/DIV., 20 ms./DIV.
        Condition Key inserted in ignition key cylinder
      2. A01DPN1E28

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection G74-15 (CODE) - G74-16 (GND)
        Tool Setting 5 V/DIV., 20 ms./DIV.
        Condition Key inserted in ignition key cylinder
      3. A01DONWE01

        Waveform 3 (Reference)

        Measurement Condition
        Item Content
        Tester Connection G74-13 (EFIO) - G74-16 (GND)
        Tool Setting 10 V/DIV., 100 ms./DIV.
        Condition Ignition switch ON
      4. A01DPYJE01

        Waveform 4 (Reference)

        Measurement Condition
        Item Content
        Tester Connection G74-12 (EFII) - G74-16 (GND)
        Tool Setting 5 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned to ON after battery disconnected and connected

  4. CHECK ECM (for 2TR-FE)

    A01DQYBE08

    1. Measure the voltage according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G60-32 (IMO) - Body ground SB - Body ground Transponder key ECU output signal Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned to ON after battery disconnected and connected

      Pulse generation

      (see waveform 1)
      G60-31 (IMI) - Body ground W - Body ground Transponder key ECU input signal Ignition switch off → ON

      Below 1 V → Pulse generation

      (see waveform 2)

      If the result is not as specified, the ECM may have a malfunction.

    2. Inspect using an oscilloscope.


      1. A01DPYJE01

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection G60-32 (IMO) - Body ground
        Tool Setting 5 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned to ON after battery disconnected and connected
      2. A01DONWE01

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection G60-31 (IMI) - Body ground
        Tool Setting 10 V/DIV., 100 ms./DIV.
        Condition Ignition switch ON

  5. CHECK ECM (for 1GR-FE)

    A01DQYBE06

    1. Measure the voltage according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G56-20 (IMO) - Body ground SB - Body ground Transponder key ECU output signal Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned to ON after battery disconnected and connected

      Pulse generation

      (see waveform 1)
      G56-14 (IMI) - Body ground W - Body ground Transponder key ECU input signal Ignition switch off → ON

      Below 1 V → Pulse generation

      (see waveform 2)

      If the result is not as specified, the ECM may have a malfunction.

    2. Inspect using an oscilloscope.


      1. A01DPYJE01

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection G56-20 (IMO) - Body ground
        Tool Setting 5 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned to ON after battery disconnected and connected
      2. A01DONWE01

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection G56-14 (IMI) - Body ground
        Tool Setting 10 V/DIV., 100 ms./DIV.
        Condition Ignition switch ON

  6. CHECK ECM (for 1KD-FTV)

    A01DQYBE07

    1. Measure the voltage according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G58-29 (IMO) - Body ground SB - Body ground Transponder key ECU output signal Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned to ON after battery disconnected and connected

      Pulse generation

      (see waveform 1)
      G58-28 (IMI) - Body ground W - Body ground Transponder key ECU input signal Ignition switch off → ON

      Below 1 V → Pulse generation

      (see waveform 2)

      If the result is not as specified, the ECM may have a malfunction.

    2. Inspect using an oscilloscope.


      1. A01DPYJE01

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection G58-29 (IMO) - Body ground
        Tool Setting 5 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned to ON after battery disconnected and connected
      2. A01DONWE01

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection G58-28 (IMI) - Body ground
        Tool Setting 10 V/DIV., 100 ms./DIV.
        Condition Ignition switch ON

  7. CHECK ECM (for 5L-E)

    A01DP0RE02

    1. Measure the voltage according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G61-6 (IMO) - Body ground SB - Body ground Transponder key ECU output signal Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned to ON after battery disconnected and connected

      Pulse generation

      (see waveform 1)
      G61-17 (IMI) - Body ground W - Body ground Transponder key ECU input signal Ignition switch off → ON

      Below 1 V → Pulse generation

      (see waveform 2)

      If the result is not as specified, the ECM may have a malfunction.

    2. Inspect using an oscilloscope.


      1. A01DPYJE01

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection G61-6 (IMO) - Body ground
        Tool Setting 5 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned to ON after battery disconnected and connected
      2. A01DONWE01

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection G61-17 (IMI) - Body ground
        Tool Setting 10 V/DIV., 100 ms./DIV.
        Condition Ignition switch ON