ENGINE IMMOBILISER SYSTEM TERMINALS OF ECU


  1. CHECK POWER SWITCH


    1. Disconnect the L43 power switch connector.

      A01JALTE17

    2. Measure the resistance 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 Wiring Color Terminal Description Condition Specified Condition
      L43-8 (AGND) - Body ground P - 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 L43 power switch connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      L43-9 (TXCT) - L43-8 (AGND) V - P Key code output signal

      • Power switch off

      • 30 seconds after door opened and closed

      • Brake pedal not depressed

      		 Below 1 V
      L43-9 (TXCT) - L43-8 (AGND) V - P Key code output signal

      • Power switch off

      • Key not in cabin

      • Power switch pressed within 30 seconds

      Pulse generation

      (See waveform 1)
      L43-10 (CODE) - L43-8 (AGND) L - P Demodulated signal of key code data

      • Power switch off

      • 30 seconds after door opened and closed

      • Brake pedal not depressed

      		 Below 1 V
      L43-10 (CODE) - L43-8 (AGND) L - P Demodulated signal of key code data

      • Power switch off

      • Key battery removed

      • Power switch touched with key and pressed

      Pulse generation

      (See waveform 2)
      L43-14 (VC5) - L43-8 (AGND) Y - P Power supply

      • Power switch off

      • 30 seconds after door opened and closed

      • Brake pedal not depressed

      		 Below 1 V
      L43-14 (VC5) - L43-8 (AGND) Y - P Power supply

      • Power switch off

      • Key not in cabin

      • Power switch pressed within 30 seconds

      Pulse generation

      (See waveform 3)

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

    5. Inspect using an oscilloscope.


      1. A01J8Y9E01

        Waveform 1 (Reference)

        Item Content
        Tester Connection L43-9 (TXCT) - L43-8 (AGND)
        Tool Setting 2 V/DIV., 50 ms./DIV.
        Condition

        • Power switch off

        • Key not in cabin

        • Power switch pressed within 30 seconds
      2. A01J9USE01

        Waveform 2 (Reference)

        Item Content
        Tester Connection L43-10 (CODE) - L43-8 (AGND)
        Tool Setting 2 V/DIV., 50 ms./DIV.
        Condition

        • Power switch off

        • Key battery removed

        • Power switch touched with key and pressed
      3. A01JC02E01

        Waveform 3 (Reference)

        Item Content
        Tester Connection L43-14 (VC5) - L43-8 (AGND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition

        • Power switch off

        • Key not in cabin

        • Power switch pressed within 30 seconds

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Disconnect the L62 certification ECU (smart key ECU assembly) connector.

      A01JANLE16

    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 Wiring Color Terminal Description Condition Specified Condition
      L62-1 (+B) - L62-15 (E) B - W-B +B power supply Power switch off 11 to 14 V
      L62-15 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L62-17 (CUTB) - L62-15 (E) Y - W-B Dark current cut fuse pin input signal Power switch off 11 to 14 V

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

    3. Reconnect the L62 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
      L62-2 (IND) - Body ground B - Body ground Security indicator light signal

      • Power switch on (IG)

      • Security indicator light off

      		 Below 2 V
      L62-2 (IND) - Body ground B - Body ground Security indicator light signal

      • Power switch off

      • Security indicator light blinks

      		 Pulse generation
      L62-12 (TXCT) - L62-36 (AGND) V - P Power switch TXCT output

      • Power switch off

      • 30 seconds after door opened and closed

      • Brake pedal not depressed

      		 Below 1 V
      L62-12 (TXCT) - L62-36 (AGND) V - P Power switch TXCT output

      • Power switch off

      • Key not in cabin

      • Power switch pressed within 30 seconds

      		 Pulse generation (See waveform 1)
      L62-13 (CODE) - L62-36 (AGND) L - P Power switch CODE input

      • Power switch off

      • 30 seconds after door opened and closed

      • Brake pedal not depressed

      		 Below 1 V
      L62-13 (CODE) - L62-36 (AGND) L - P Power switch CODE input

      • Power switch off

      • Key battery removed

      • Power switch touched with key and pressed

      		 Pulse generation (See waveform 2)
      L62-16 (IG) - L62-15 (E) BE - W-B IG power supply Power switch off Below 1 V
      L62-16 (IG) - L62-15 (E) BE - W-B IG power supply Power switch on (IG) 11 to 14 V
      L62-28 (VC5) - L62-36 (AGND) Y - P Power switch power supply

      • Power switch off

      • 30 seconds after door opened and closed

      • Brake pedal not depressed

      		 Below 1 V
      L62-28 (VC5) - L62-36 (AGND) Y - P Power switch power supply

      • Power switch off

      • Key not in cabin

      • Power switch pressed within 30 seconds

      		 Pulse generation (See waveform 3)
      L62-34 (EFII) - L62-15 (E)* L - W-B Power management control ECU (HV CPU) output signal Power switch off 11 to 14 V
      L62-34 (EFII) - L62-15 (E)* L - W-B Power management control ECU (HV CPU) output signal Within 3 seconds after power switch on (READY), or within 3 seconds after power switch first turned on (IG) after battery disconnected and connected Pulse generation (See waveform 4)
      L62-35 (EFIO) - L62-15 (E)* R - W-B Power management control ECU (HV CPU) input signal Power switch off Below 1 V
      L62-35 (EFIO) - L62-15 (E)* R - W-B Power management control ECU (HV CPU) input signal Power switch on (IG) Pulse generation (See waveform 5)
      L62-36 (AGND) - Body ground P - Body ground Power switch ground Always Below 1 Ω

      • *: w/o Airbag Cut-off Switch

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

    5. Inspect using an oscilloscope.


      1. A01J8Y9E01

        Waveform 1 (Reference)

        Item Content
        Tester Connection L62-12 (TXCT) - L62-36 (AGND)
        Tool Setting 2 V/DIV., 50 ms./DIV.
        Condition

        • Power switch off

        • Key not in cabin

        • Power switch pressed within 30 seconds
      2. A01J9USE01

        Waveform 2 (Reference)

        Item Content
        Tester Connection L62-13 (CODE) - L62-36 (AGND)
        Tool Setting 2 V/DIV., 50 ms./DIV.
        Condition

        • Power switch off

        • Key battery removed

        • Power switch touched with key and pressed
      3. A01JC02E01

        Waveform 3 (Reference)

        Item Content
        Tester Connection L62-28 (VC5) - L62-36 (AGND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition

        • Power switch off

        • Key not in cabin

        • Power switch pressed within 30 seconds
      4. A01JBP7E01

        Waveform 4 (Reference)

        Item Content
        Tester Connection L62-34 (EFII) - L62-15 (E)
        Tool Setting 5 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds after power switch on (READY), or within 3 seconds after power switch first turned on (IG) after battery disconnected and connected
      5. A01JB7ZE01

        Waveform 5 (Reference)

        Item Content
        Tester Connection L62-35 (EFIO) - L62-15 (E)
        Tool Setting 5 V/DIV., 50 ms./DIV.
        Condition Power switch on (IG)

  3. CHECK ID CODE BOX (IMMOBILISER CODE ECU) (w/ Airbag Cut-off Switch)


    1. Disconnect the L10 ID code box (immobiliser code ECU) connector.

      A01J8JRE20

    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 Wiring Color Terminal Description Condition Specified Condition
      L10-1 (+B) - L10-8 (GND) B - W-B +B power supply Power switch off 11 to 14 V
      L10-8 (GND) - Body ground W-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 L10 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
      L10-5 (EFII) - L10-8 (GND) L - W-B Power management control ECU (HV CPU) output signal Power switch off 11 to 14 V
      L10-5 (EFII) - L10-8 (GND) L - W-B Power management control ECU (HV CPU) output signal Within 3 seconds after power switch on (READY), or within 3 seconds after power switch first turned on (IG) after battery disconnected and connected

      Pulse generation

      (See waveform 1)
      L10-6 (EFIO) - L10-8 (GND) R - W-B Power management control ECU (HV CPU) input signal Power switch off Below 1 V
      L10-6 (EFIO) - L10-8 (GND) R - W-B Power management control ECU (HV CPU) input signal Power 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. A01JBP7E01

        Waveform 1 (Reference)

        Item Content
        Tester Connection L10-5 (EFII) - L10-8 (GND)
        Tool Setting 5 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds after power switch on (READY), or within 3 seconds after power switch first turned on (IG) after battery disconnected and connected
      2. A01JB7ZE01

        Waveform 2 (Reference)

        Item Content
        Tester Connection L10-6 (EFIO) - L10-8 (GND)
        Tool Setting 5 V/DIV., 50 ms./DIV.
        Condition Power switch on (IG)

  4. CHECK TRANSMISSION CONTROL ECU ASSEMBLY


    1. Disconnect the A23 and A24 transmission control ECU assembly connectors.

      A01JATGE02

    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 the connectors disconnected.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      A23-15 (BATT) - Body ground SB - Body ground Battery power supply Power switch off 11 to 14 V
      A24-1 (E1) - Body ground BR - Body ground Ground Always Below 1 Ω
      A24-5 (E02) - Body ground W-B - Body ground Ground Always Below 1 Ω
      A24-6 (E01) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

  5. CHECK POWER MANAGEMENT CONTROL ECU (HV CPU)


    1. Disconnect the L5 power management control ECU (HV CPU) connector.

      A01J9XAE02

    2. Measure the resistance 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 Wiring Color Terminal Description Condition Specified Condition
      L5-6 (E1) - Body ground BR - 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 L5 power management control ECU (HV CPU) connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      L6-20 (IMO) - L5-6 (E1) L - BR Certification ECU (smart key ECU assembly)*1 or ID code box (immobiliser code ECU)*2 input signal Power switch off 11 to 14 V
      L6-20 (IMO) - L5-6 (E1) L - BR Certification ECU (smart key ECU assembly)*1 or ID code box (immobiliser code ECU)*2 input signal Within 3 seconds after power switch on (READY), or within 3 seconds after power switch first turned on (IG) after battery disconnected and connected

      Pulse generation

      (See waveform 1)
      L6-21 (IMI) - L5-6 (E1) R - BR Certification ECU (smart key ECU assembly)*1 or ID code box (immobiliser code ECU)*2 output signal Power switch off Below 1 V
      L6-21 (IMI) - L5-6 (E1) R - BR Certification ECU (smart key ECU assembly)*1 or ID code box (immobiliser code ECU)*2 output signal Power switch on (IG)

      Pulse generation

      (See waveform 2)

      • *1: w/o Airbag Cut-off Switch

      • *2: w/ Airbag Cut-off Switch

      • If the result is not as specified, the power management control ECU (HV CPU) may have a malfunction.

    5. Waveform:


      1. A01JBP7E01

        Waveform 1 (Reference)

        Item Content
        Tester Connection L6-20 (IMO) - L5-6 (E1)
        Tool Setting 5 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds after power switch on (READY), or within 3 seconds after power switch first turned on (IG) after battery disconnected and connected
      2. A01JB7ZE01

        Waveform 2 (Reference)

        Item Content
        Tester Connection L6-21 (IMI) - L5-6 (E1)
        Tool Setting 5 V/DIV., 50 ms./DIV.
        Condition Power switch on (IG)

  6. COMBINATION METER ASSEMBLY


    1. Disconnect the L27 combination meter assembly connector.

      A01JCOWE02

    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 the connector disconnected.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L27-18 (B) - Body ground R - Body ground Battery Power switch off 11 to 14 V
      L27-30 (ES) - Body ground BR - Body ground Ground (Signal ground) Always Below 1 Ω

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

    3. Reconnect the L27 combination 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
      L27-19 (IG+) - Body ground L - Body ground Power switch signal Power switch off Below 1 V
      L27-19 (IG+) - Body ground L - Body ground Power switch signal Power switch on (IG) 11 to 14 V
      L27-22 (LP) - Body ground B - Body ground Security indicator light signal

      • Power switch on (IG)

      • Security indicator light off

      		 Below 2 V
      L27-22 (LP) - Body ground B - Body ground Security indicator light signal

      • Power switch off

      • Security indicator light blinks

      		 Pulse generation

      If the result is not as specified, the combination meter assembly may have a malfunction.