IMMOBILISER SYSTEM TERMINALS OF ECU


  1. CHECK POWER SWITCH

    A003LN5N77

    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
      I53-6 (AGND) - Body ground - W - Body ground Transponder key amplifier ground Always Below 1 Ω -
      I53-7 (TXCT) - I53-6 (AGND) Input V - W Immobiliser communication input Power switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed Below 1 V -
      I53-8 (CODE) - I53-6 (AGND) Output L - W Immobiliser communication output Power switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed Below 1 V -
      I53-10 (VC5) - I53-6 (AGND) Input B - W Transponder key amplifier power supply Power switch off, brake pedal not depressed, 30 seconds or more 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
      I53-7 (TXCT) - I53-6 (AGND) Input V - W

      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, electrical key transmitter sub-assembly 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 verification communication is not performed correctly, the malfunction may be indicated by one or more of the Data List items listed above
      I53-8 (CODE) - I53-6 (AGND) Output L - W

      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 electrical key transmitter sub-assembly held near power switch*

      Pulse generation

      (See waveform 2)
      I53-10 (VC5) - I53-6 (AGND) Input B - W

      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, electrical key transmitter sub-assembly not in cabin, within 30 seconds after power switch pressed

      Pulse generation

      (See waveform 3)

      Tech Tips

      *: Remove the transmitter battery before performing this inspection.

    3. Using an oscilloscope, check the waveform.

      Note

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


      1. A003MOSN18

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection I53-7 (TXCT) - I53-6 (AGND)
        Tool Setting 2 V/DIV., 20 ms./DIV.
        Condition Power switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds after power switch pressed
      2. A003MN9C01
        *a Waveform
        *b Waveform (detail)

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection I53-8 (CODE) - I53-6 (AGND)
        Tool Setting

        • Waveform

          1 V/DIV., 20 ms./DIV.

        • Waveform (detail)

          2 V/DIV., 100 μs./DIV.
        Condition Power switch off, power switch pressed with electrical key transmitter sub-assembly held near power switch*

        Tech Tips

        *: Remove the transmitter battery before performing this inspection.

      3. A003O04N05

        Waveform 3 (Reference)

        Measurement Condition
        Item Content
        Tester Connection I53-10 (VC5) - I53-6 (AGND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition Power switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds after power switch pressed

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    A003NAXN30

    1. Disconnect the I1 certification ECU (smart key ECU assembly) 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
      I1-4 (+B) - I1-18 (E) Input GR - W-B +B power supply Power switch off 11 to 14 V -
      I1-18 (E) - Body ground - W-B - Body ground Ground Always Below 1 Ω -

    3. Reconnect the I1 certification ECU (smart key ECU assembly) connector.

    4. Measure the voltage and resistance, and 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
      I1-17 (IG1D) - I1-18 (E) Output L - W-B Ignition power supply Power switch off Below 1 V -
      Power switch on (IG) 11 to 14 V -
      I1-5 (TXCT) - I1-11 (AGND) Output V - W Signal output to transponder key amplifier Power switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed Below 1 V

      • BCC Malfunction

      • Abnormal Status

      • Different Encrypt Code

      • Different Serial Number

      • Frame Error

      • Response
      I1-6 (CODE) - I1-11 (AGND) Input L - W Signal input from transponder key amplifier Power switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed Below 1 V
      I1-7 (VC5) - I1-11 (AGND) Output B - W Transponder key amplifier power supply Power switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed Below 1 V
      I1-11 (AGND) - Body ground - W - Body ground Transponder key amplifier ground Always Below 1 Ω
      I1-20 (IND) - I1-18 (E) Output R - W-B Security indicator output Power switch off → on (IG) Pulse generation → Below 2 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
      I1-5 (TXCT) - I1-11 (AGND) Output V - W

      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, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed

      Pulse generation

      (See waveform 1)

      • BCC Malfunction

      • Abnormal Status

      • Different Encrypt Code

      • Different Serial Number

      • Frame Error

      • Response
      I1-6 (CODE) - I1-11 (AGND) Input L - W

      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 electrical key transmitter sub-assembly held near power switch

      Tech Tips

      Remove the transmitter battery before performing this inspection.

      Pulse generation

      (See waveform 2)
      I1-7 (VC5) - I1-11 (AGND) Output B - W

      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, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed

      Pulse generation

      (See waveform 3)

    6. Using an oscilloscope, check the waveform.

      Note

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


      1. A003MOSN19

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection I1-5 (TXCT) - I1-11 (AGND)
        Tool Setting 2 V/DIV., 20 ms./DIV.
        Condition Power switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed
      2. A003MN9C01
        *a Waveform
        *b Waveform (detail)

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection I1-6 (CODE) - I1-11 (AGND)
        Tool Setting

        • Waveform

          1 V/DIV., 20 ms./DIV.

        • Waveform (detail)

          2 V/DIV., 100 μs./DIV.
        Condition Power switch off, power switch pressed with electrical key transmitter sub-assembly held near power switch*

        Tech Tips

        *: Remove the transmitter battery before performing this inspection.

      3. A003O04N06

        Waveform 3 (Reference)

        Measurement Condition
        Item Content
        Tester Connection I1-7 (VC5) - I1-11 (AGND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition Power switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed

  3. CHECK ID CODE BOX (IMMOBILISER CODE ECU)

    A003JVDN03

    1. Disconnect the I20 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
      I20-1 (+B) - Body ground Input

      W - Body ground*1

      GR - Body ground*2

      		 +B power supply Power switch off 11 to 14 V B2789
      I20-5 (GND) - Body ground - W - Body ground Ground Always Below 1 Ω B2789

    3. Reconnect the I20 ID code box (immobiliser code ECU) connector.

    4. Measure the voltage and 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
      I20-3 (EFII) - I20-5 (GND) Input

      W - W*1

      BE - W*2

      EFI communication input

      (Signal input from hybrid vehicle control ECU to ID code box (immobiliser code ECU))

      		 Power switch off 11 to 14 V

      • B279986

      • B279A12

      • EFI Code Receive

      • Engine Start Request
      I20-4 (EFIO) - I20-5 (GND) Output

      W - W*1

      B - W*2

      EFI communication output

      (Signal output from ID code box (immobiliser code ECU) to hybrid vehicle control ECU)

      		 Power switch off 11 to 14 V
      I20-3 (EFII) - I20-5 (GND) Input

      W - W*1

      BE - W*2

      EFI communication input

      (Signal input from hybrid vehicle control ECU to ID code box (immobiliser code ECU))

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

      Pulse generation

      (See waveform 1)
      I20-4 (EFIO) - I20-5 (GND) Output

      W - W*1

      B - W*2

      EFI communication output

      (Signal output from ID code box (immobiliser code ECU) to hybrid vehicle control ECU)

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

      Pulse generation

      (See waveform 2)

      • *1: for RHD

      • *2: for LHD

    5. Using an oscilloscope, check the waveform.

      Note

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


      1. Waveform 1 (Reference)

        A003KXIC03
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection I20-3 (EFII) - I20-5 (GND)
        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 cable disconnected and reconnected to auxiliary battery

      2. Waveform 2 (Reference)

        A003MXBC02
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection I20-4 (EFIO) - I20-5 (GND)
        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 cable disconnected and reconnected to auxiliary battery

  4. CHECK HYBRID VEHICLE CONTROL ECU

    A003MAHN15

    1. Measure the voltage and resistance and 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
      I3-1 (+B2) - I3-3 (E1) Input L - W-B Ignition power supply Power switch on (IG) 11 to 14 V -
      A41-11 (+B1) - I3-3 (E1) Input L - W-B Ignition power supply Power switch on (IG) 11 to 14 V -
      A41-5 (MREL) - I3-3 (E1) Output BE - W-B Ignition power supply Power switch on (IG) 11 to 14 V -
      I3-3 (E1) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      I2-34 (E12) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      I3-27 (BATT) - I3-3 (E1) Input GR - W-B +B power supply Power switch off 11 to 14 V -
      I3-23 (IMO) - I3-3 (E1) Output

      W - W-B*1

      BE - W-B*2

      		 ID code box (immobiliser code ECU) communication output Power switch off 11 to 14 V -
      I3-23 (IMO) - I3-3 (E1) Output

      W - W-B*1

      BE - W-B*2

      		 ID code box (immobiliser code ECU) communication output Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after cable disconnected and reconnected to auxiliary battery

      Pulse generation

      (See waveform 1)

      		 -
      I3-10 (IMI) - I3-3 (E1) Input

      W - W-B*1

      B - W-B*2

      		 ID code box (immobiliser code ECU) communication input Power switch off 11 to 14 V -
      I3-10 (IMI) - I3-3 (E1) Input

      W - W-B*1

      B - W-B*2

      		 ID code box (immobiliser code ECU) communication input Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after cable disconnected and reconnected to auxiliary battery

      Pulse generation

      (See waveform 2)

      		 -

      • *1: for RHD

      • *2: for LHD

    2. Using an oscilloscope, check the waveform.

      Note

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


      1. Waveform 1 (Reference)

        A003KXIC03
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection I3-23 (IMO) - I3-3 (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 cable disconnected and reconnected to auxiliary battery

      2. Waveform 2 (Reference)

        A003MXBC02
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection I3-10 (IMI) - I3-3 (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 cable disconnected and reconnected to auxiliary battery