ENGINE IMMOBILISER SYSTEM TERMINALS OF ECU


  1. CHECK POWER SWITCH

    A01HW59E03

    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
      I58-6 (AGND) - Body ground - G - Body ground Transponder key amplifier ground Always Below 1 Ω -
      I58-7 (TXCT) - I58-6 (AGND) Input GR - G 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 -
      I58-8 (CODE) - I58-6 (AGND) Output SB - G 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 -
      I58-10 (VC5) - I58-6 (AGND) Input LG - G 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
      I58-7 (TXCT) - I58-6 (AGND) Input GR - G

      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
      I58-8 (CODE) - I58-6 (AGND) Output SB - G

      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)
      I58-10 (VC5) - I58-6 (AGND) Input LG - G

      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)

      If the result is not as specified, the power switch may be malfunctioning.

      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. A01HSRJE14

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection I58-7 (TXCT) - I58-6 (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. A01HSFBE01
        Text in Illustration
        *a Key held against power switch

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection I58-8 (CODE) - I58-6 (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. A01HUGGE01

        Waveform 3 (Reference)

        Measurement Condition
        Item Content
        Tester Connection I58-10 (VC5) - I58-6 (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)

    A01HVGLE05

    1. Disconnect the I86 and I87 certification ECU (smart key ECU assembly) connector.

    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
      I87-5 (+B) - I86-1 (E) Input SB - W-B +B power supply Always 11 to 14 V -
      I87-4 (CUTB) - I86-1 (E) Input W - W-B Dark current cut pin Always 11 to 14 V -
      I86-1 (E) - Body ground - W-B - Body ground Ground Always Below 1 Ω -

    3. Reconnect the I86 and I87 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
      I87-16 (IG) - I86-1 (E) Input LG - W-B Ignition power supply Power switch off → on (IG) Below 1 V → 11 to 14 V Ignition Switch
      I86-8 (IND) - I86-1 (E) Output L - W-B Security indicator output Power switch off → on (IG)

      Pulse generation

      → Below 2 V

      		 -
      I87-3 (TXCT) - I86-6 (AGND) Output GR - G 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
      I87-13 (CODE) - I86-6 (AGND) Input SB - G 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
      I87-9 (VC5) - I86-6 (AGND) Output LG - G 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
      I86-6 (AGND) - Body ground - G - Body ground Transponder key amplifier ground Always Below 1 Ω
      I87-10 (EFII) - I86-1 (E) Input G - W-B

      EFI communication input

      (Signal input from power management control ECU to certification ECU (smart key ECU assembly))

      		 Power switch off 11 to 14 V

      • B2799

      • B279A

      • Engine Start Request

      • EFI Code Receive
      I87-14 (EFIO) - I86-1 (E) Output L - W-B

      EFI communication output

      (Signal output from certification ECU (smart key ECU assembly) to power management control ECU)

      		 Power switch off Below 1 V

    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
      I87-3 (TXCT) - I86-6 (AGND) Output GR - G

      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
      I87-13 (CODE) - I86-6 (AGND) Input SB - G

      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)
      I87-9 (VC5) - I86-6 (AGND) Output LG - G

      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)
      I87-10 (EFII) - I86-1 (E) Input G - W-B

      EFI communication input

      (Signal input from power management control ECU to certification ECU (smart key ECU assembly))

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

      Pulse generation

      (See waveform 4)

      • B2799

      • B279A

      • Engine Start Request

      • EFI Code Receive
      I87-14 (EFIO) - I86-1 (E) Output L - W-B

      EFI communication output

      (Signal output from certification ECU (smart key ECU assembly) to power management control ECU)

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

      Pulse generation

      (See waveform 5)

      If the result is not as specified, the certification ECU (smart key ECU assembly) may be malfunctioning.

      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. A01HSRJE14

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection I87-3 (TXCT) - I86-6 (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. A01HSFBE01
        Text in Illustration
        *a Key held against power switch

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection I87-13 (CODE) - I86-6 (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. A01HUGGE01

        Waveform 3 (Reference)

        Measurement Condition
        Item Content
        Tester Connection I87-9 (VC5) - I86-6 (AGND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition Power switch off, key not in cabin, within 30 seconds after power switch pressed

      4. Waveform 4 (Reference)

        A01HV42E01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection I87-10 (EFII) - I86-1 (E)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected

      5. Waveform 5 (Reference)

        A01HSPQE01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection I87-14 (EFIO) - I86-1 (E)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected

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

    A01HUYME73

    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
      I24-1 (GND) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      I24-3 (IGE) - I24-1 (GND) Input SB - 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
      I24-4 (SLP1) - I24-1 (GND) Output P - 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
      I24-6 (IG2) - I24-1 (GND) Input LG - 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
      I24-7 (B) - Body ground Output B - Body ground Constant power supply Always 11 to 14 V B2788

      If the result is not as specified, the steering lock ECU (steering lock actuator assembly) may be malfunctioning.

      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. A01HTMSE01
        Text in Illustration
        *a Steering lock motor not operating
        *b Steering lock motor operating

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection I24-3 (IGE) - I24-1 (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

  4. CHECK POWER MANAGEMENT CONTROL ECU

    A01HVVLE03
    Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item/DTC
    A38-2 (+B2) - I3-5 (E01) Input B - W-B IG power supply Power switch on (IG) 11 to 14 V -
    A39-5 (+B1) - I3-5 (E01) Input B - W-B IG power supply Power switch on (IG) 11 to 14 V -
    A39-6 (MREL) - I3-5 (E01) Input V - W-B IG power supply Power switch on (IG) 11 to 14 V -
    I3-1 (AM22) - I3-6 (E1) Input SB - BR +B power supply Always 11 to 14 V -
    I3-5 (E01) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
    I3-6 (E1) - Body ground - BR - Body ground Ground Always Below 1 Ω -
    I4-4 (E12) - Body ground - BR - Body ground Ground Always Below 1 Ω -
    I4-5 (E02) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
    I4-7 (AM21) - I3-6 (E1) Input L - BR +B power supply Always 11 to 14 V -
    I4-20 (IMO) - I3-6 (E1) Input G - BR Certification ECU (smart key ECU assembly) communication input Power switch off 11 to 14 V -
    I4-20 (IMO) - I3-6 (E1) Input G - BR Certification ECU (smart key ECU assembly) communication input Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected

    Pulse generation

    (See waveform 1)

    		 -
    I4-21 (IMI) - I3-6 (E1) Output L - BR Certification ECU (smart key ECU assembly) communication output Power switch off Below 1 V -
    I4-21 (IMI) - I3-6 (E1) Output L - BR Certification ECU (smart key ECU assembly) communication output Within 3 seconds of hybrid control 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)

        A01HV42E01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection I4-20 (IMO) - I3-6 (E1)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected

      2. Waveform 2 (Reference)

        A01HSPQE01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection I4-21 (IMI) - I3-6 (E1)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected