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


  1. CHECK TRANSPONDER KEY AMPLIFIER


    1. Disconnect the D21 transponder key amplifier connector.

      A01EK71E01

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

      Tech Tips

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D21-7 (AGND) - Body ground W - 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 D21 transponder key amplifier connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D21-1 (VC5) - D21-7 (AGND) R - W Power source No key in ignition key cylinder Below 1 V
      D21-1 (VC5) - D21-7 (AGND) R - W Power source Key in ignition key cylinder 4.6 to 5.4 V
      D21-4 (CODE) - D21-7 (AGND) LG - W Demodulated signal of key code data No key in ignition key cylinder Below 1 V
      D21-4 (CODE) - D21-7 (AGND) LG - W Demodulated signal of key code data Key in ignition key cylinder

      Pulse generation

      (See waveform 1)
      D21-5 (TXCT) - D21-7 (AGND) BR - W Key code output signal No key in ignition key cylinder Below 1 V
      D21-5 (TXCT) - D21-7 (AGND) BR - W Key code output signal Key in ignition key cylinder

      Pulse generation

      (See waveform 2)

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

    5. Inspect using an oscilloscope.


      1. A01EMK3E01

        Waveform 1 (Reference)

        Tester Connection D21-4 (CODE) - D21-7 (AGND)
        Tool Setting 2 V/DIV., 20 ms./DIV.
        Condition Key is in ignition key cylinder
      2. A01EMF2E01

        Waveform 2 (Reference)

        Tester Connection D21-5 (TXCT) - D21-7 (AGND)
        Tool Setting 2 V/DIV., 10 ms./DIV.
        Condition Key is in ignition key cylinder

  2. CHECK TRANSPONDER KEY ECU ASSEMBLY


    1. Disconnect the D22 transponder key ECU assembly connector.

      A01ELFDE12

    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 connector disconnected.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D22-16 (GND) - Body ground B - Body ground Ground Always Below 1 Ω
      D22-1 (+B) - D22-16 (GND) G - B Battery Always 11 to 14 V
      D22-2 (IG) - D22-16 (GND) R - B Ignition switch signal Ignition switch off Below 1 V
      D22-2 (IG) - D22-16 (GND) R - B Ignition switch signal Ignition switch ON 11 to 14 V
      D22-3 (KSW) - D22-16 (GND) V - B Unlock warning switch signal No key in ignition key cylinder 10 kΩ or higher
      D22-3 (KSW) - D22-16 (GND) V - B Unlock warning switch signal Key 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 D22 transponder 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
      D22-5 (AGND) - Body ground W - Body ground Ground Always Below 1 Ω
      D22-3 (KSW) - D22-16 (GND) V - B Unlock warning switch signal No key in ignition key cylinder 11 to 14 V
      D22-3 (KSW) - D22-16 (GND) V - B Unlock warning switch signal Key in ignition key cylinder Below 1 V
      D22-14 (VC5) - D22-5 (AGND) R - W Power source No key in ignition key cylinder Below 1 V
      D22-14 (VC5) - D22-5 (AGND) R - W Power source Key in ignition key cylinder 4.6 to 5.4 V
      D22-4 (TXCT) - D22-5 (AGND) BR - W Transponder key amplifier communication signal No key in ignition key cylinder Below 1 V
      D22-4 (TXCT) - D22-5 (AGND) BR - W Transponder key amplifier communication signal Key in ignition key cylinder

      Pulse generation

      (See waveform 1)
      D22-15 (CODE) - D22-5 (AGND) LG - W Transponder key amplifier communication signal No key in ignition key cylinder Below 1 V
      D22-15 (CODE) - D22-5 (AGND) LG - W Transponder key amplifier communication signal Key in ignition key cylinder

      Pulse generation

      (See waveform 2)
      D22-13 (EFIO) - D22-16 (GND) G - B ECM output signal Ignition switch off Below 1 V
      D22-13 (EFIO) - D22-16 (GND) G - B ECM output signal Ignition switch ON

      Pulse generation

      (See waveform 3)
      D22-12 (EFII) - D22-16 (GND) BR - B ECM input signal Ignition switch off 11 to 14 V
      D22-12 (EFII) - D22-16 (GND) BR - B ECM input signal Within 3 seconds after starter operates and initial combustion occurs, or within 3seconds after ignition switch first turned on (IG) after battery disconnected and connected.

      Pulse generation

      (See waveform 4)
      D22-9 (D) - D22-16 (GND) L - B Diagnostic tester communication Without communication Below 1 V
      D22-9 (D) - D22-16 (GND) L - B Diagnostic tester communication During communication Pulse generation
      D22-7 (CTY) - D22-16 (GND) G - B Door courtesy signal Switch pushed 11 to 14 V
      D22-7 (CTY) - D22-16 (GND) G - B Door courtesy signal Switch free Below 1 V
      D22-8 (IND) - D22-16 (GND) Y - B Security indicator signal Ignition switch off, security indicator light blinks Alternating between 11 to 14 V and below 1 V
      D22-8 (IND) - D22-16 (GND) Y - B Security indicator signal Ignition switch ON, security indicator light off Below 1 V

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

    5. Inspect using an oscilloscope.


      1. A01EMF2E01

        Waveform 1 (Reference)

        Tester Connection D22-4 (TXCT) - D22-5 (AGND)
        Tool Setting 2 V/DIV., 10 ms./DIV.
        Condition Key is in ignition key cylinder
      2. A01EMK3E01

        Waveform 2 (Reference)

        Tester Connection D22-15 (CODE) - D22-5 (AGND)
        Tool Setting 2 V/DIV., 20 ms./DIV.
        Condition Key is in ignition key cylinder
      3. A01EMP1E01

        Waveform 3 (Reference)

        Tester Connection D22-13 (EFIO) - D22-16 (GND)
        Tool Setting 2 V/DIV., 1 s./DIV.
        Condition Ignition switch ON
      4. A01EJ8GE01

        Waveform 4 (Reference)

        Tester Connection D22-12 (EFII) - D22-16 (GND)
        Tool Setting 5 V/DIV., 500 ms/DIV.
        Condition Within 3 seconds after starter operates and initial combustion occurs, or within 3seconds after ignition switch first turned on (IG) after battery disconnected and connected.

  3. CHECK ECM


    1. The values listed under "Specified Condition" are reference values. Because waterproof connectors are used for ECM, inspections cannot be performed with the connectors connected.

      A01EMOFE13
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      B58-104 (E1) - Body ground BR - Body ground Ground Always Below 1 Ω
      A49-10 (IMO) - B58-104 (E1) BR - BR Certification ECU (smart key ECU assembly) output signal Ignition switch off 11 to 14 V
      A49-10 (IMO) - B58-104 (E1) BR - BR Certification ECU (smart key ECU assembly) output signal Within 3 seconds after the starter operates and initial combustion occurs, or within 3 seconds after Ignition switch first turned on (IG) after battery disconnected and connected

      Pulse generation

      (See waveform 1)
      A49-11 (IMI) - B58-104 (E1) G - BR Certification ECU (smart key ECU assembly) input signal Ignition switch off 11 to 14 V
      A49-11 (IMI) - B58-104 (E1) G - BR Certification ECU (smart key ECU assembly) input signal Ignition switch on (IG)

      Pulse generation

      (See waveform 2)

    2. Inspect using an oscilloscope.


      1. A01EJ8GE01

        Waveform 1 (Reference)

        Tester Connection A49-10 (IMO) - B58-104 (E1)
        Tool Setting 5 V/DIV., 500 ms/DIV.
        Condition Within 3 seconds after starter operates and initial combustion occurs, or within 3seconds after ignition switch first turned on (IG) after battery disconnected and connected.
      2. A01EMP1E01

        Waveform 2 (Reference)

        Tester Connection A49-11 (IMI) - B58-104 (E1)
        Tool Setting 2 V/DIV., 1 s./DIV.
        Condition Ignition switch ON

  4. ACCESSORY METER ASSEMBLY


    1. Disconnect the F2 accessory meter assembly connector.

      A01EMH7E01

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

      Tech Tips

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F2-1 (B) - Body ground P - Body ground Battery Always 11 to 14 V
      F2-12 (E) - Body ground B - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the F2 accessory meter assembly connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F2-14 (LP) - Body ground Y - Body ground Security indicator light signal Ignition switch ON, security indicator light off 11 to 14 V
      F2-14 (LP) - Body ground Y - Body ground Security indicator light signal Ignition switch off, security indicator light blinks Alternating between 11 to 14 V and below 1 V

      If the result is not as specified, the accessory meter assembly may be malfunctioning.