ENGINE IMMOBILISER SYSTEM TERMINALS OF ECU


  1. CHECK POWER SWITCH

    A005DLCE03

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

      Inspection with Power Switch Off
      Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item/DTC
      L43-8 (AGND) - Body ground - P - Body ground Ground Always Below 1 Ω -
      L43-9 (TXCT) - L43-8 (AGND) Input V - P Immobiliser communication input Power switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed Below 1 V -
      L43-10 (CODE) - L43-8 (AGND) Output L - P Immobiliser communication output Power switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed Below 1 V -
      L43-14 (VC5) - L43-8 (AGND) Input Y - P 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 -
      Inspection of Waveforms of Communication Signals between Power Switch and Certification ECU (Smart Key ECU Assembly)
      Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item/DTC
      L43-9 (TXCT) - L43-8 (AGND) Input V - P

      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 antenna of transponder key amplifier as electric waves)

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

      Pulse generation

      (See waveform 1)

      • BCC Malfunction

      • Abnormal Status

      • Different Encrypt Code

      • Different Serial Number

      (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)
      L43-10 (CODE) - L43-8 (AGND) Output L - P

      Signal output to certification ECU (smart key ECU assembly)

      (Electric waves from transponder key amplifier built into power switch used to detect key information. Information then sent to certification ECU (smart key ECU assembly))

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

      Pulse generation

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

      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 the cabin, within 30 seconds after power switch pressed

      Pulse generation

      (See waveform 3)

      Tech Tips

      *: Remove the transmitter battery before performing this inspection.

    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. A005BLME41

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection L43-9 (TXCT) - L43-8 (AGND)
        Tool Setting 2 V/DIV., 20 ms./DIV.
        Condition Power switch off, key not in the cabin, within 30 seconds after power switch pressed
      2. A005AQ4E13
        Text in Illustration
        *a Key held against power switch

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection L43-10 (CODE) - L43-8 (AGND)
        Tool Setting 1 V/DIV., 200 ms./DIV.
        Condition Power switch off, power switch pressed with key held against power switch*

        Tech Tips

        *: Remove the transmitter battery before performing this inspection.

      3. A005EYBE01

        Waveform 3 (Reference)

        Measurement Condition
        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 the cabin, within 30 seconds after power switch pressed

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    A005BGSE03

    1. Disconnect the L62 ECU 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
      L62-1 (+B) - L62-15 (E) Input B - W-B +B power supply Power switch off 11 to 14 V -
      L62-17 (CUTB) - L62-15 (E) Input R - W-B Dark current cut pin* Power switch off 11 to 14 V -
      L62-15 (E) - Body ground - W-B - Body ground Ground Always Below 1 Ω -

      • *: In order to prevent the auxiliary battery from being discharged when the vehicle is shipped long distances, a fuse that cuts unnecessary electrical load while the vehicle is being shipped is set in the circuit. If the fuse is removed, the circuit becomes open. If the fuse between the auxiliary battery and terminal CUTB is removed and the circuit is open, the certification ECU (smart key ECU assembly) changes to a certain control mode (example: the transmission of electric waves every 250 ms. that form the detection area stops).

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

    3. Reconnect the L62 ECU connector.

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

      Inspection with Power Switch Off
      Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item/DTC
      L62-2 (IND) - L62-15 (E) Output GR - W-B Security indicator output Power switch off → on (IG)

      Pulse generation

      → Below 2 V

      		 -
      L62-12 (TXCT) - L62-36 (AGND) Output V - P 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
      L62-13 (CODE) - L62-36 (AGND) Input L - P 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
      L62-16 (IG) - L62-15 (E) Input BE - W-B Ignition power supply Power switch off → on (IG) Below 1 V → 11 to 14 V Ignition Switch
      L62-28 (VC5) - L62-36 (AGND) Output Y - P 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

      • BCC Malfunction

      • Abnormal Status

      • Different Encrypt Code

      • Different Serial Number
      L62-36 (AGND) - Body ground - P - Body ground Transponder key amplifier ground Always Below 1 Ω
      Inspection of Waveforms of Communication Signals between Power Switch and Certification ECU (Smart Key ECU Assembly)
      Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item/DTC
      L62-12 (TXCT) - L62-36 (AGND) Output V - P

      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 antenna of transponder key amplifier as electric waves)

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

      Pulse generation

      (See waveform 1)

      • BCC Malfunction

      • Abnormal Status

      • Different Encrypt Code

      • Different Serial Number
      L62-13 (CODE) - L62-36 (AGND) Input L - P

      Signal input from transponder key amplifier

      (Electric waves from transponder key amplifier built into power switch used to detect key information. Information then sent to certification ECU (smart key ECU assembly))

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

      Pulse generation

      (See waveform 2)
      L62-28 (VC5) - L62-36 (AGND) Output Y - P

      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 the cabin, within 30 seconds after power switch pressed

      Pulse generation

      (See waveform 3)

      Tech Tips

      *: Remove the transmitter battery before performing this inspection.

    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. A005BLME41

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection L62-12 (TXCT) - L62-36 (AGND)
        Tool Setting 2 V/DIV., 20 ms./DIV.
        Condition Power switch off, key not in the cabin, within 30 seconds after power switch pressed
      2. A005AQ4E13
        Text in Illustration
        *a Key held against power switch

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection L62-13 (CODE) - L62-36 (AGND)
        Tool Setting 1 V/DIV., 200 ms./DIV.
        Condition Power switch off, power switch pressed with key held against power switch*

        Tech Tips

        *: Remove the transmitter battery before performing this inspection.

      3. A005EYBE01

        Waveform 3 (Reference)

        Measurement Condition
        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 the cabin, within 30 seconds after power switch pressed

  3. CHECK ID CODE BOX (IMMOBILISER CODE ECU)

    A005AP7E03

    1. Disconnect the L10 box 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
      L10-1 (+B) - L10-8 (GND) Input W - W-B +B power supply Power switch off 11 to 14 V B2789
      L10-8 (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 L10 box 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
      L10-5 (EFII) - L10-8 (GND) Input SB - W-B

      EFI communication input

      (Signal input from power management control ECU to ID code box (immobiliser code ECU))

      		 Power switch off 11 to 14 V

      • B2799

      • B279A

      • Engine Start Request

      • EFI Code Receive
      L10-5 (EFII) - L10-8 (GND) Input SB - W-B

      EFI communication input

      (Signal input from power management 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 auxiliary battery cable disconnected and reconnected

      Pulse generation

      (See waveform 1)
      L10-6 (EFIO) - L10-8 (GND) Output LG - W-B

      EFI communication output

      (Signal output from ID code box (immobiliser code ECU) to power management control ECU)

      		 Power switch off 11 to 14 V
      L10-6 (EFIO) - L10-8 (GND) Output LG - W-B

      EFI communication output

      (Signal output from ID code box (immobiliser code ECU) 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 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)

        A005DOZE01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 510 ms
        Measurement Condition
        Item Content
        Tester Connection L10-5 (EFII) - L10-8 (GND)
        Tool Setting 2 V/DIV., 200 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)

        A005DPAE01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 510 ms
        Measurement Condition
        Item Content
        Tester Connection L10-6 (EFIO) - L10-8 (GND)
        Tool Setting 2 V/DIV., 200 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

  4. CHECK TRANSMISSION CONTROL ECU ASSEMBLY

    A005B1WE02

    1. Disconnect the A23 and A24 ECU connectors.

    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 Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item/DTC
      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 -
      A23-16 (+B) - Body ground Input L - Body ground +B power supply Power switch off 11 to 14 V -
      A23-15 (BATT) - Body ground Input SB - Body ground +B power supply Power switch off 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

    A005ANNE03

    1. Measure the voltage and resistance, 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
      A21-2 (+B2) - L5-5 (E01) Input L - W-B Ignition power supply Power switch on (IG) 11 to 14 V -
      A22-5 (+B1) - L5-5 (E01) Input L - W-B Ignition power supply Power switch on (IG) 11 to 14 V -
      A22-6 (MREL) - L5-5 (E01) Input BE - W-B Ignition power supply Power switch on (IG) 11 to 14 V -
      L5-1 (AM22) - L5-6 (E1) Input W - W-B +B power supply Power switch off 11 to 14 V -
      L5-5 (E01) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      L5-6 (E1) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      L6-4 (E12) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      L6-5 (E02) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      L6-7 (AM21) - L5-6 (E1) Input Y - W-B +B power supply Power switch off 11 to 14 V -
      L6-20 (IMO) - L5-6 (E1) Input SB - W-B ID code box (immobiliser code ECU) communication input Power switch off 11 to 14 V -
      L6-20 (IMO) - L5-6 (E1) Input SB - W-B 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 auxiliary battery cable disconnected and reconnected

      Pulse generation

      (See waveform 1)

      		 -
      L6-21 (IMI) - L5-6 (E1) Output LG - W-B ID code box (immobiliser code ECU) communication output Power switch off 11 to 14 V -
      L6-21 (IMI) - L5-6 (E1) Output LG - W-B 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 auxiliary battery cable disconnected and reconnected

      Pulse generation

      (See waveform 2)

      		 -

    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. Waveform 1 (Reference)

        A005DOZE01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 510 ms
        Measurement Condition
        Item Content
        Tester Connection L6-20 (IMO) - L5-6 (E1)
        Tool Setting 2 V/DIV., 200 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)

        A005DOZE01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 510 ms
        Measurement Condition
        Item Content
        Tester Connection L6-21 (IMI) - L5-6 (E1)
        Tool Setting 2 V/DIV., 200 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