ENGINE IMMOBILISER SYSTEM TERMINALS OF ECU


  1. CHECK POWER SWITCH

    A01FTO8E09

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

      Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item/DTC
      N43-6 (AGND) - Body ground - L - Body ground Transponder key amplifier ground Always Below 1 Ω -
      N43-7 (TXCT) - N43-6 (AGND) Input W - L Immobiliser communication input Power switch off, brake pedal not depressed, 30 seconds or more elapsed after driver door opened and then closed Below 1 V -
      N43-8 (CODE) - N43-6 (AGND) Output Y - L Immobiliser communication output Power switch off, brake pedal not depressed, 30 seconds or more elapsed after driver door opened and then closed Below 1 V -
      N43-10 (VC5) - N43-6 (AGND) Input L - L Transponder key amplifier power supply Power switch off, brake pedal not depressed, 30 seconds or more elapsed after driver door opened and then closed Below 1 V -

    2. Check for pulses according to the value(s) in the table below.

      Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item/DTC
      N43-7 (TXCT) - N43-6 (AGND) Input W - L

      Signal input from certification ECU (smart key ECU assembly)

      (Code sent from certification ECU [smart key ECU assembly] to transponder key amplifier built into power switch, and then transmitted by transponder key amplifier antenna as radio waves)

      		 Power switch off, key not in cabin, within 30 seconds after power switch pressed

      Pulse generation

      (See waveform 1)

      • BCC Malfunction

      • Abnormal Status

      • Different Encrypt Code

      • Different Serial Number

      • Frame Error

      • Response

        Tech Tips

        If immobiliser key code certification communication is not performed correctly, the malfunction may be indicated by one or more of the Data List items listed above
      N43-8 (CODE) - N43-6 (AGND) Output Y - L

      Signal output to certification ECU (smart key ECU assembly)

      (Radio waves from transponder key amplifier built into power switch used to detect key information. Key information then sent to certification ECU [smart key ECU assembly])

      		 Power switch off, power switch pressed with key held near power switch*

      Pulse generation

      (See waveform 2)
      N43-10 (VC5) - N43-6 (AGND) Input L - L

      Transponder key amplifier power supply

      (Power supplied from certification ECU [smart key ECU assembly] when transponder key amplifier built into power switch activated)

      		 Power switch off, key not in cabin, within 30 seconds after power switch pressed

      Pulse generation

      (See waveform 3)

      Tech Tips

      *: Remove the key battery before performing this inspection.

    3. Inspect using an oscilloscope.

      Note

      The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.


      1. A01FQK5E14

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection N43-7 (TXCT) - N43-6 (AGND)
        Tool Setting 2 V/DIV., 20 ms./DIV.
        Condition Power switch off, key not in cabin, within 30 seconds after power switch pressed
      2. A01FRWYE01
        Text in Illustration
        *a Key held against power switch

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection N43-8 (CODE) - N43-6 (AGND)
        Tool Setting 1 V/DIV., 200 ms./DIV.
        Condition Power switch off, power switch pressed with key held near power switch*

        Tech Tips

        *: Remove the key battery before performing this inspection.

      3. A01FTUKE01

        Waveform 3 (Reference)

        Measurement Condition
        Item Content
        Tester Connection N43-10 (VC5) - N43-6 (AGND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition Power switch off, key not in cabin, within 30 seconds after power switch pressed

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    A01FTANE23

    1. Disconnect the n94 and N95 certification ECU (smart key ECU assembly) connectors.

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

      Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item/DTC
      N95-5 (+B) - N94-1 (E) Input GR - W-B +B power supply Always 11 to 14 V -
      N95-4 (CUTB) - N94-1 (E) Input P - W-B Dark current cut pin Always 11 to 14 V -
      N94-1 (E) - Body ground - W-B - Body ground Ground Always Below 1 Ω -

    3. Reconnect the A34 certification ECU (smart key ECU assembly) connector.

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

      Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item/DTC
      N95-16 (IG) - N94-1 (E) Input B - W-B Ignition power supply Power switch off → on (IG) Below 1 V → 11 to 14 V Ignition Switch
      N94-8 (IND) - N94-1 (E) Output LG - W-B Security indicator output Power switch off → on (IG)

      Pulse generation

      → Below 2 V

      		 -
      N95-3 (TXCT) - N94-6 (AGND) Output W - L Signal output to transponder key amplifier Power switch off, brake pedal not depressed, 30 seconds or more elapsed after driver door opened and then closed Below 1 V

      • BCC Malfunction

      • Abnormal Status

      • Different Encrypt Code

      • Different Serial Number

      • Frame Error

      • Response
      N95-13 (CODE) - N94-6 (AGND) Input Y - L Signal input from transponder key amplifier Power switch off, brake pedal not depressed, 30 seconds or more elapsed after driver door opened and then closed Below 1 V
      N95-9 (VC5) - N94-6 (AGND) Output L - L Transponder key amplifier power supply Power switch off, brake pedal not depressed, 30 seconds or more elapsed after driver door opened and then closed Below 1 V
      N94-6 (AGND) - Body ground - L - Body ground Transponder key amplifier ground Always Below 1 Ω

    5. Check for pulses according to the value(s) in the table below.

      Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item/DTC
      N95-3 (TXCT) - N94-6 (AGND) Output W - L

      Signal output to transponder key amplifier

      (Code sent from certification ECU [smart key ECU assembly] to transponder key amplifier built into power switch, and then transmitted by transponder key amplifier antenna as radio waves)

      		 Power switch off, key not in cabin, within 30 seconds after power switch pressed

      Pulse generation

      (See waveform 1)

      • BCC Malfunction

      • Abnormal Status

      • Different Encrypt Code

      • Different Serial Number

      • Frame Error

      • Response
      N95-13 (CODE) - N94-6 (AGND) Input Y - L

      Signal input from transponder key amplifier

      (Radio waves from transponder key amplifier built into power switch used to detect key information. Key information then sent to certification ECU [smart key ECU assembly])

      		 Power switch off, power switch pressed with key held near power switch*

      Pulse generation

      (See waveform 2)
      N95-9 (VC5) - N94-6 (AGND) Output L - L

      Transponder key amplifier power supply

      (Power supplied from certification ECU [smart key ECU assembly] when transponder key amplifier built into power switch activated)

      		 Power switch off, key not in cabin, within 30 seconds after power switch pressed

      Pulse generation

      (See waveform 3)

      Tech Tips

      *: Remove the key battery before performing this inspection.

    6. Inspect using an oscilloscope.

      Note

      The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.


      1. A01FQK5E14

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection N95-3 (TXCT) - N94-6 (AGND)
        Tool Setting 2 V/DIV., 20 ms./DIV.
        Condition Power switch off, key not in cabin, within 30 seconds after power switch pressed
      2. A01FRWYE01
        Text in Illustration
        *a Key held against power switch

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection N95-13 (CODE) - N94-6 (AGND)
        Tool Setting 1 V/DIV., 200 ms./DIV.
        Condition Power switch off, power switch pressed with key held near power switch*

        Tech Tips

        *: Remove the key battery before performing this inspection.

      3. A01FTUKE01

        Waveform 3 (Reference)

        Measurement Condition
        Item Content
        Tester Connection N95-9 (VC5) - N94-6 (AGND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition Power switch off, key not in cabin, within 30 seconds after power switch pressed

  3. CHECK ID CODE BOX (IMMOBILISER CODE ECU)

    A01FRB8E01

    1. Disconnect the N73 ID code box (immobiliser code ECU) connector.

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

      Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item/DTC
      N73-1 (+B) - Body ground Input GR - Body ground +B power supply Power switch off 11 to 14 V B2789
      N73-5 (GND) - Body ground - W-B - Body ground Ground Always Below 1 Ω B2789

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

    3. Reconnect the N73 ID code box (immobiliser code ECU) connector.

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

      Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item/DTC
      N73-3 (EFII) - N73-5 (GND) Input P - W-B

      Powr management control ECU communication input

      (Signal input from power management control ECU to ID code bos [immobiliser code ECU])

      		 Power switch off 11 to 14 V

      • B2799

      • B279A

      • Engine Start Request

      • EFI Code Receive
      N73-4 (EFIO) - N73-5 (GND) Output LG - W-B

      Powr management control ECU communication output

      (Signal output from ID code bos [immobiliser code ECU] to power management control ECU)

      		 Power switch off Below 1 V
      N73-3 (EFII) - N73-5 (GND) Input P - W-B

      Powr management control ECU communication input

      (Signal input from power management control ECU to ID code bos [immobiliser code ECU])

      		 Within 3 seconds of hybrid system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected

      Pulse generation

      (See waveform 1)
      N73-4 (EFIO) - N73-5 (GND) Output LG - W-B

      Powr management control ECU communication output

      (Signal output from ID code bos [immobiliser code ECU] to power management control ECU)

      		 Within 3 seconds of hybrid system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected

      Pulse generation

      (See waveform 2)

    5. Inspect using an oscilloscope.

      Note

      The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.


      1. Waveform 1 (Reference)

        A01FVP5E01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection N73-3 (EFII) - N73-5 (GND)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of hybrid system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected

      2. Waveform 2 (Reference)

        A01FT93E01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection N73-4 (EFIO) - N73-5 (GND)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of hybrid system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected

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

    A01FTDEE01

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

      Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item/DTC
      N24-1 (GND) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      N24-3 (IGE) - N24-1 (GND) Input G - W-B Steering lock motor operation permission signal (motor operation permission signal supplied by certification ECU [smart key ECU assembly])

      Steering lock motor operates when both conditions met, and then door opened:


      • Shift lever in P

      • Key carried, power switch turned on (IG), steering unlocked, and then power switch turned off

      Pulse generation

      (See waveform 1)

      • Power Supply Short

      • Unlock Request Receive

      • Lock Request Receive
      N24-4 (SLP1) - N24-1 (GND) Output L - W-B Steering lock bar position signal (signal output from steering unlock sensor) Steering locked → unlocked*1 11 to 14 V → Below 1.2 V

      • Push Start Error

      • Sensor Value
      N24-6 (IG2) - N24-1 (GND) Input B - W-B IG signal (IG2 power supply input for steering lock motor) Power switch off → on (IG) Below 1 V → 11 to 14 V

      • B2788

      • Ignition Switch
      N24-7 (B) - Body ground Output L - Body ground Constant power supply Always 11 to 14 V B2788

      Tech Tips

      *1: The steering locks when any door is opened with the shift lever in P and the power switch off. The steering unlocks when the power switch is turned on (ACC).

    2. Inspect using an oscilloscope.

      Note

      The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.


      1. A01FR4NE01
        Text in Illustration
        *a Steering lock motor not operating
        *b Steering lock motor operating

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection N24-3 (IGE) - N24-1 (GND)
        Tool Setting 2 V/DIV., 20 ms./DIV.
        Condition

        Steering lock motor operates when both conditions met, and then door opened:


        • Shift lever in P

        • Key carried, power switch turned on (IG), steering unlocked, and then power switch turned off

  5. CHECK POWER MANAGEMENT CONTROL ECU

    A01FUA5E06

    Tech Tips

    The standard voltage between each pair of power management control ECU terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard voltage for that pair of terminals, displayed in the "Specified Condition" column. The illustration above can be used as a reference to identify the power management control ECU terminal locations.

    Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item/DTC
    N91-1 (AM22) - N91-6 (E1) Input P - W-B +B power supply Always 11 to 14 V -
    N91-5 (E01) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
    N91-6 (E1) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
    N92-4 (E12) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
    N92-5 (E02) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
    N92-7 (AM21) - N91-6 (E1) Input P - W-B +B power supply Always 11 to 14 V
    N92-28 (IMO) - N91-6 (E1) Input P - W-B ID code box (immobiliser code EUC) communication input Power switch off 11 to 14 V -
    N92-28 (IMO) - N91-6 (E1) Input P - W-B ID code box (immobiliser code EUC) communication input Within 3 seconds of hybrid system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected

    Pulse generation

    (See waveform 1)

    		 -
    N92-29 (IMI) - N91-6 (E1) Output LG - W-B ID code box (immobiliser code EUC) communication output Power switch off Below 1 V -
    N92-29 (IMI) - N91-6 (E1) Output LG - W-B ID code box (immobiliser code EUC) communication output Within 3 seconds of hybrid system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected

    Pulse generation

    (See waveform 2)

    		 -

    1. Inspect using an oscilloscope.

      Note

      The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.


      1. Waveform 1 (Reference)

        A01FVP5E01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection N92-28 (IMO) - N91-6 (E1)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of hybrid system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected

      2. Waveform 2 (Reference)

        A01FT93E01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection N92-29 (IMI) - N91-6 (E1)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of hybrid system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected