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


  1. CHECK ENGINE SWITCH


    1. Disconnect the D22 engine switch connector.

      A017ENAE05

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D22-8 (AGND) - Body ground V - 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 D22 engine switch connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D22-8 (AGND) - Body ground V - Body ground Ground Always Below 1 Ω
      D22-9 (TXCT) - D22-8 (AGND) BE - V Key code output signal Key is not in cabin Below 1 V
      D22-9 (TXCT) - D22-8 (AGND) BE - V Key code output signal Press engine switch and hold key close to engine switch*

      Pulse generation

      (See waveform 1)
      D22-10 (CODE) - D22-8 (AGND) GR - V Demodulated signal of key code data Key is not in cabin Below 1 V
      D22-10 (CODE) - D22-8 (AGND) GR - V Demodulated signal of key code data Press engine switch and hold key close to engine switch*

      Pulse generation

      (see waveform 2)
      D22-14 (VC5) - D22-8 (AGND) G - V Power supply Engine switch off, brake pedal not depressed, 30 seconds or more elapsed after driver door opened and then closed Below 1 V
      D22-14 (VC5) - D22-8 (AGND) G - V Power supply Engine switch off, key not in cabin, within 30 seconds after engine switch pressed

      Pulse generation

      (See waveform 3)

      Tech Tips

      *: Remove the key battery before performing this inspection.


      • If the result is not as specified, the engine switch may have a malfunction.

    5. Inspect using an oscilloscope.


      1. A017F26E01

        Waveform 1 (Reference)

        Item Content
        Tester Connection D22-9 (TXCT) - D22-8 (AGND)
        Tool Setting 2 V/DIV., 50 ms./DIV.
        Condition Press engine switch and hold key close to engine switch*

        Tech Tips

        *: Remove the key battery before performing this inspection.

      2. A017DJBE01

        Waveform 2 (Reference)

        Item Content
        Tester Connection D22-10 (CODE) - D22-8 (AGND)
        Tool Setting 2 V/DIV., 50 ms./DIV.
        Condition Press engine switch and hold key close to engine switch*

        Tech Tips

        *: Remove the key battery before performing this inspection.

      3. A017BJ4E01

        Waveform 3 (Reference)

        Item Content
        Tester Connection D22-14 (VC5) - D22-8 (AGND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition Engine switch off, key not in cabin, within 30 seconds after engine switch pressed

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Disconnect the D36 certification ECU (smart key ECU assembly) connector.

      A017DQOE11

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D36-1 (+B) - D36-17 (E) B - W-B +B power supply Always 11 to 14 V
      D36-17 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      D36-18 (IG) - D36-17 (E) G - W-B Ignition power supply Engine switch off Below 1 V
      D36-18 (IG) - D36-17 (E) G - W-B Ignition power supply Engine switch on (IG) 11 to 14 V

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

    3. Reconnect the D36 certification ECU (smart key ECU assembly) connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D36-8 (TXCT) - D36-40 (AGND) BE - V Engine switch TXCT output Key is not in cabin Below 1 V
      D36-8 (TXCT) - D36-40 (AGND) BE - V Engine switch TXCT output Press engine switch and hold key close to engine switch* Pulse generation (See waveform 1)
      D36-9 (CODE) - D36-40 (AGND) GR - V Engine switch CODE input Key is not in cabin Below 1 V
      D36-9 (CODE) - D36-40 (AGND) GR - V Engine switch CODE input Press engine switch and hold key close to engine switch* Pulse generation (See waveform 2)
      D36-30 (VC5) - D36-40 (AGND) G - V Engine switch power supply Engine switch off, brake pedal not depressed, 30 seconds or more elapsed after driver door opened and then closed Below 1 V
      D36-30 (VC5) - D36-40 (AGND) G - V Engine switch power supply Engine switch off, key not in cabin, within 30 seconds after engine switch pressed

      Pulse generation

      (See waveform 3)
      D36-40 (AGND) - Body ground V - Body ground Engine switch ground Always Below 1 Ω

      Tech Tips

      *: Remove the key battery before performing this inspection.


      • If the result is not as specified, the certification ECU (smart key ECU assembly) may have a malfunction.

    5. Inspect using an oscilloscope.


      1. A017F26E01

        Waveform 1 (Reference)

        Item Content
        Tester Connection D36-8 (TXCT) - D36-40 (AGND)
        Tool Setting 2 V/DIV., 50 ms./DIV.
        Condition Press engine switch and hold key close to engine switch*

        Tech Tips

        *: Remove the key battery before performing this inspection.

      2. A017DJBE01

        Waveform 2 (Reference)

        Item Content
        Tester Connection D36-9 (CODE) - D36-40 (AGND)
        Tool Setting 2 V/DIV., 50 ms./DIV.
        Condition Press engine switch and hold key close to engine switch*

        Tech Tips

        *: Remove the key battery before performing this inspection.

      3. A017BJ4E01

        Waveform 3 (Reference)

        Item Content
        Tester Connection D36-30 (VC5) - D36-40 (AGND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition Engine switch off, key not in cabin, within 30 seconds after engine switch pressed

  3. CHECK ID CODE BOX (IMMOBILISER CODE ECU)


    1. Disconnect the D28 ID code box (immobiliser code ECU) connector.

      A017G1IE08

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D28-1 (+B) - D28-8 (GND) W - V +B power supply Always 11 to 14 V
      D28-8 (GND) - Body ground V - 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 D28 ID code box (immobiliser code ECU) connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D28-5 (EFII) - D28-8 (GND) V - V ECM input signal Engine switch off 11 to 14 V
      D28-5 (EFII) - D28-8 (GND) V - V ECM input signal Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after engine switch first turned on (IG) after battery disconnected and connected.

      Pulse generation

      (see waveform 1)
      D28-6 (EFIO) - D28-8 (GND) L - V ECM output signal Engine switch off Below 1 V
      D28-6 (EFIO) - D28-8 (GND) L - V ECM output signal Engine switch on (IG)

      Pulse generation

      (see waveform 2)

      • If the result is not as specified, the ID code box (immobiliser code ECU) may have a malfunction.

    5. Inspect using an oscilloscope.


      1. A017DXJE01

        Waveform 1 (Reference)

        Item Content
        Tester Connection D28-5 (EFII) - D28-8 (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 engine switch first turned on (IG) after battery disconnected and connected.
      2. A017FY7E01

        Waveform 2 (Reference)

        Item Content
        Tester Connection D28-6 (EFIO) - D28-8 (GND)
        Tool Setting 10 V/DIV., 100 ms./DIV.
        Condition Engine switch on (IG)

  4. CHECK STEERING LOCK ECU


    1. Disconnect the D10 steering lock ECU connector.

      A017DG3E14

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D10-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      D10-2 (SGND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      D10-6 (IG2) - Body ground V - Body ground Ignition power supply Engine switch off Below 1 V
      D10-6 (IG2) - Body ground V - Body ground Ignition power supply Engine switch on (IG) 11 to 14 V
      D10-7 (B) - Body ground G - Body ground +B power supply Always 11 to 14 V

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

  5. CHECK ECM


    1. Disconnect the B48 ECM connector and measure the resistance according to the value(s) in the table below.

      A017DNIE13
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      B48-12 (E1) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    2. Reconnect the B48 ECM connector. Measure the voltage according to the value(s) in the table below.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D55-20 (IMO) - B48-12 (E1) V - W-B Transponder key ECU output signal Engine switch off 11 to 14 V
      D55-20 (IMO) - B48-12 (E1) V - W-B Transponder key ECU output signal Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after engine switch first turned on (IG) after battery disconnected and connected. Waveform 1
      D55-14 (IMI) - B48-12 (E1) L - W-B Transponder key ECU input signal Engine switch off Below 1 V
      D55-14 (IMI) - B48-12 (E1) L - W-B Transponder key ECU input signal Engine switch on (IG) Waveform 2

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

    3. Inspect using an oscilloscope.


      1. A017DXJE01

        Waveform 1 (Reference)

        Item Content
        Tester Connection D55-20 (IMO) - B48-12 (E1)
        Tool Setting 5 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after engine switch first turned on (IG) after battery disconnected and connected.
      2. A017FY7E01

        Waveform 2 (Reference)

        Item Content
        Tester Connection D55-14 (IMI) - B48-12 (E1)
        Tool Setting 10 V/DIV., 100 ms./DIV.
        Condition Engine switch on (IG)

  6. CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)


    1. Disconnect the 1M and 1F junction block connectors.

    2. Disconnect the D6, D7 and D8 main body ECU (instrument panel junction block) connectors.

      A017BEHE15

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D6-1 (AM2) - Body ground G - Body ground +B power supply Always 11 to 14 V
      D7-6 (AM1) - Body ground GR - Body ground +B power supply Always 11 to 14 V
      D8-1 (GND3) - Body ground W-B - Body ground Ground Always Below 1 Ω
      1M-9 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      1F-10 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω

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