ENGINE IMMOBILISER SYSTEM TERMINALS OF ECU


  1. CHECK POWER SWITCH


    1. Disconnect the F22 power switch connector.

      A01NF85E13

    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
      F22-8 (AGND) - 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 F22 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
      F22-9 (TXCT) - F22-8 (AGND) L - BR Key code output signal

      • Power switch off

      • 30 seconds after door opened and closed

      • Brake pedal not depressed

      		 Below 1 V
      F22-9 (TXCT) - F22-8 (AGND) L - BR Key code output signal

      • Power switch off

      • Key not in cabin

      • Power switch pressed within 30 seconds

      Pulse generation

      (See waveform 1)
      F22-10 (CODE) - F22-8 (AGND) W - BR Demodulated signal of key code data

      • Power switch off

      • 30 seconds after door opened and closed

      • Brake pedal not depressed

      		 Below 1 V
      F22-10 (CODE) - F22-8 (AGND) W - BR Demodulated signal of key code data

      • Power switch off

      • Key battery removed

      • Power switch touched with key and pressed

      Pulse generation

      (See waveform 2)
      F22-14 (VC5) - F22-8 (AGND) R - BR Power supply

      • Power switch off

      • 30 seconds after door opened and closed

      • Brake pedal not depressed

      		 Below 1 V
      F22-14 (VC5) - F22-8 (AGND) R - BR 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. A01NFSVE01

        Waveform 1 (Reference)

        Item Content
        Tester Connection F22-9 (TXCT) - F22-8 (AGND)
        Tool Setting 2 V/DIV., 50 ms./DIV.
        Condition

        • Power switch off

        • Key not in cabin

        • Power switch pressed within 30 seconds
      2. A01NFPOE01

        Waveform 2 (Reference)

        Item Content
        Tester Connection F22-10 (CODE) - F22-8 (AGND)
        Tool Setting 2 V/DIV., 50 ms./DIV.
        Condition

        • Power switch off

        • Key battery removed

        • Power switch touched with key and pressed
      3. A01NEHCE01

        Waveform 3 (Reference)

        Item Content
        Tester Connection F22-14 (VC5) - F22-8 (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 F58 certification ECU (smart key ECU assembly) connector.

      A01NFU2E05

    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
      F58-1 (+B) - F58-15 (E) LG - W-B +B power supply Always 11 to 14 V
      F58-15 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      F58-17 (CUTB) - F58-15 (E) L - W-B Dark current cut fuse pin input signal Always 11 to 14 V

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

    3. Reconnect the F58 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
      F58-2 (IND) - Body ground BE - Body ground Security indicator light signal

      • Power switch on (IG)

      • Security indicator light off

      		 Below 2 V
      F58-2 (IND) - Body ground BE - Body ground Security indicator light signal

      • Power switch off

      • Security indicator light blinks

      		 Pulse generation
      F58-12 (TXCT) - F58-36 (AGND) L - BR Power switch TXCT output

      • Power switch off

      • 30 seconds after door opened and closed

      • Brake pedal not depressed

      		 Below 1 V
      F58-12 (TXCT) - F58-36 (AGND) L - BR Power switch TXCT output

      • Power switch off

      • Key not in cabin

      • Power switch pressed within 30 seconds

      		 Pulse generation (See waveform 1)
      F58-13 (CODE) - F58-36 (AGND) W - BR Power switch CODE input

      • Power switch off

      • 30 seconds after door opened and closed

      • Brake pedal not depressed

      		 Below 1 V
      F58-13 (CODE) - F58-36 (AGND) W - BR Power switch CODE input

      • Power switch off

      • Key battery removed

      • Power switch touched with key and pressed

      		 Pulse generation (See waveform 2)
      F58-16 (IG) - F58-15 (E) B - W-B IG power supply Power switch off Below 1 V
      F58-16 (IG) - F58-15 (E) B - W-B IG power supply Power switch on (IG) 11 to 14 V
      F58-28 (VC5) - F58-36 (AGND) R - BR Power switch power supply

      • Power switch off

      • 30 seconds after door opened and closed

      • Brake pedal not depressed

      		 Below 1 V
      F58-28 (VC5) - F58-36 (AGND) R - BR Power switch power supply

      • Power switch off

      • Key not in cabin

      • Power switch pressed within 30 seconds

      		 Pulse generation (See waveform 3)
      F58-36 (AGND) - Body ground BR - Body ground Power switch ground Always Below 1 Ω

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

    5. Inspect using an oscilloscope.


      1. A01NFSVE01

        Waveform 1 (Reference)

        Item Content
        Tester Connection F58-12 (TXCT) - F58-36 (AGND)
        Tool Setting 2 V/DIV., 50 ms./DIV.
        Condition

        • Power switch off

        • Key not in cabin

        • Power switch pressed within 30 seconds
      2. A01NFPOE01

        Waveform 2 (Reference)

        Item Content
        Tester Connection F58-13 (CODE) - F58-36 (AGND)
        Tool Setting 2 V/DIV., 50 ms./DIV.
        Condition

        • Power switch off

        • Key battery removed

        • Power switch touched with key and pressed
      3. A01NEHCE01

        Waveform 3 (Reference)

        Item Content
        Tester Connection F58-28 (VC5) - F58-36 (AGND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition

        • Power switch off

        • Key not in cabin

        • Power switch pressed within 30 seconds

  3. CHECK ID CODE BOX (IMMOBILISER CODE ECU)


    1. Disconnect the F45 ID code box (immobiliser code ECU) connector.

      A01NENHE16

    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
      F45-1 (+B) - F45-8 (GND) B - W-B +B power supply Always 11 to 14 V
      F45-8 (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 F45 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
      F45-5 (EFII) - F45-8 (GND) LG - W-B Power management control ECU (HV CPU) input signal Power switch off 11 to 14 V
      F45-5 (EFII) - F45-8 (GND) LG - W-B Power management control ECU (HV CPU) input signal Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after power switch first turned on (IG) after battery disconnected and connected

      Pulse generation

      (See waveform 1)
      F45-6 (EFIO) - F45-8 (GND) P - W-B Power management control ECU (HV CPU) output signal Power switch off 11 to 14 V
      F45-6 (EFIO) - F45-8 (GND) P - W-B Power management control ECU (HV CPU) output 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. A01NG6CE02

        Waveform 1 (Reference)

        Item Content
        Tester Connection F45-5 (EFII) - F45-8 (GND)
        Tool Setting 10 V/DIV., 100 ms./DIV.
        Condition Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after power switch first turned on (IG) after battery disconnected and connected
      2. A01NGMLE01

        Waveform 2 (Reference)

        Item Content
        Tester Connection F45-6 (EFIO) - F45-8 (GND)
        Tool Setting 10 V/DIV., 100 ms./DIV.
        Condition Power switch on (IG)

  4. CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)


    1. Disconnect the F37 steering lock ECU (steering lock actuator assembly) connector.

      A01NF3ME30

    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
      F37-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      F37-6 (IG2) - Body ground B - Body ground IG power supply Power switch off Below 1 V
      F37-6 (IG2) - Body ground B - Body ground IG power supply Power switch on (IG) 11 to 14 V
      F37-7 (B) - Body ground L - Body ground +B power supply Always 11 to 14 V

      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 A81 power management control ECU (HV CPU) connector.

      A01NFODE01

    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
      F97-6 (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 A81 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
      F98-20 (IMO) - F97-6 (E1) LG - BR ID code box (immobiliser code ECU) output signal Power switch off 11 to 14 V
      F98-20 (IMO) - F97-6 (E1) LG - BR ID code box (immobiliser code ECU) output signal Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after power switch first turned on (IG) after battery disconnected and connected

      Pulse generation

      (See waveform 1)
      A98-21 (IMI) - F97-6 (E1) P - BR ID code box (immobiliser code ECU) input signal Power switch off 11 to 14 V
      A98-21 (IMI) - F97-6 (E1) P - BR ID code box (immobiliser code ECU) input signal Power switch on (IG)

      Pulse generation

      (See waveform 2)

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

    5. Waveform:


      1. A01NG6CE02

        Waveform 1 (Reference)

        Item Content
        Tester Connection F98-20 (IMO) - F97-6 (E1)
        Tool Setting 5 V/DIV., 100 ms./DIV.
        Condition Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after power switch first turned on (IG) after battery disconnected and connected
      2. A01NGMLE01

        Waveform 2 (Reference)

        Item Content
        Tester Connection A98-21 (IMI) - F97-6 (E1)
        Tool Setting 5 V/DIV., 100 ms./DIV.
        Condition Power switch on (IG)

  6. CHECK RADIO RECEIVER ASSEMBLY


    1. Disconnect the G8 radio receiver assembly connector.

      A01NHQ9E01

    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
      G8-8 (+B) - Body ground SB - Body ground Battery Except power switch on (READY) 11 to 14 V
      G8-8 (+B) - Body ground SB - Body ground Battery Power switch on (READY) 11 to 15.5 V
      G8-9 (GND) - Body ground BR - Body ground Ground Always Below 1 Ω
      G8-15 (IG+) - Body ground* Y - Body ground IG power supply Power switch off Below 1 V
      G8-15 (IG+) - Body ground* Y - Body ground IG power supply Power switch on (IG) 11 to 14 V
      G8-16 (ACC) - Body ground GR - Body ground ACC power supply Power switch off Below 1 V
      G8-16 (ACC) - Body ground GR - Body ground ACC power supply Power switch on (ACC) 11 to 14 V

      • *: w/ Navigation System

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

    3. Reconnect the G8 radio receiver 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
      G8-7 (LP) - Body ground P - Body ground Security indicator light signal

      • Power switch on (IG)

      • Security indicator light off

      		 Below 2 V
      G8-7 (LP) - Body ground P - Body ground Security indicator light signal

      • Power switch off

      • Security indicator light blinks

      		 Pulse generation

      If the result is not as specified, the radio receiver assembly may have a malfunction.