ENGINE IMMOBILISER SYSTEM TERMINALS OF ECU


  1. CHECK POWER SWITCH

    A003W7ME35

    1. Measure the resistance and voltage 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
      H78-8 (AGND) - Body ground - P - Body ground Ground Always Below 1 Ω -
      H78-9 (TXCT) - H78-8 (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 -
      H78-10 (CODE) - H78-8 (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 -
      H78-14 (VC5) - H78-8 (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
      H78-9 (TXCT) - H78-8 (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)

      		 After power switch turned off, within 30 seconds of any door opened and closed, or brake pedal depressed

      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)
      H78-10 (CODE) - H78-8 (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))

      		 After power switch turned off, within 30 seconds of any door opened and closed, or brake pedal depressed, and then key held against power switch*

      Pulse generation

      (See waveform 2)
      H78-14 (VC5) - H78-8 (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)

      		 After power switch turned off, within 30 seconds of any door opened and closed, or brake pedal depressed

      Pulse generation

      (See waveform 3)

      Tech Tips

      *: Remove the key 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. A003VN3E14

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection H78-9 (TXCT) - H78-8 (AGND)
        Tool Setting 2 V/DIV., 20 ms./DIV.
        Condition After power switch turned off, within 30 seconds of any door opened and closed, or brake pedal depressed
      2. A003XXZE01
        Text in Illustration
        *a Key held against power switch

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection H78-10 (CODE) - H78-8 (AGND)
        Tool Setting 1 V/DIV., 200 ms./DIV.
        Condition After power switch turned off, within 30 seconds of any door opened and closed, or brake pedal depressed, and then key held against power switch*

        Tech Tips

        *: Remove the key battery before performing this inspection.

      3. A003VELE01

        Waveform 3 (Reference)

        Measurement Condition
        Item Content
        Tester Connection H78-14 (VC5) - H78-8 (AGND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition After power switch turned off, within 30 seconds of any door opened and closed, or brake pedal depressed

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    A003ZGSE72

    1. Disconnect the H1*1 or H143*2 ECU connector.


      • *1: w/ Entry Function

      • *2: w/o Entry Function

    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

      H1-1 (+B) - H1-15 (E)*1

      H143-1 (+B) - H143-15 (E)*2

      		 Input B - W-B +B power supply Power switch off 11 to 14 V -

      H1-17 (CUTB) - H1-15 (E)*1

      H143-17 (CUTB) - H143-15 (E)*2

      		 Input Y - W-B Dark current cut pin* Power switch off 11 to 14 V -

      H1-15 (E) - Body ground*1

      H143-15 (E) - Body ground*2

      		 - W-B - Body ground Ground Always Below 1 Ω -

      • *1: w/ Entry Function

      • *2: w/o Entry Function


      • *: 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 H1*1 or H143*2 ECU connector.


      • *1: w/ Entry Function

      • *2: w/o Entry Function

    4. Measure the resistance and voltage 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

      H1-2 (IND) - H1-15 (E)*1

      H143-2 (IND) - H143-15 (E)*2

      		 Output BR - W-B Security indicator output Power switch off → on (IG)

      Pulse generation

      → Below 2 V

      		 -

      H1-12 (TXCT) - H1-36 (AGND)*1

      H143-12 (TXCT) - H143-36 (AGND)*2

      		 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

      H1-13 (CODE) - H1-36 (AGND)*1

      H143-13 (CODE) - H143-36 (AGND)*2

      		 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

      H1-16 (IG) - H1-15 (E)*1

      H143-16 (IG) - H143-15 (E)*2

      		 Input BE - W-B Ignition power supply Power switch off → on (IG) Below 1 V → 11 to 14 V Ignition Switch

      H1-28 (VC5) - H1-36 (AGND)*1

      H143-28 (VC5) - H143-36 (AGND)*2

      		 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

      H1-36 (AGND) - Body ground*1

      H143-36 (AGND) - Body ground*2

      		 - P - Body ground Transponder key amplifier ground Always Below 1 Ω

      • *1: w/ Entry Function

      • *2: w/o Entry Function

      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

      H1-12 (TXCT) - H1-36 (AGND)*1

      H143-12 (TXCT) - H143-36 (AGND)*2

      		 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)

      		 After power switch turned off, within 30 seconds of any door opened and closed, or brake pedal depressed

      Pulse generation

      (See waveform 1)

      • BCC Malfunction

      • Abnormal Status

      • Different Encrypt Code

      • Different Serial Number

      H1-13 (CODE) - H1-36 (AGND)*1

      H143-13 (CODE) - H143-36 (AGND)*2

      		 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))

      		 After power switch turned off, within 30 seconds of any door opened and closed, or brake pedal depressed, and then key held against power switch*

      Pulse generation

      (See waveform 2)

      H1-28 (VC5) - H1-36 (AGND)*1

      H143-28 (VC5) - H143-36 (AGND)*2

      		 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)

      		 After power switch turned off, within 30 seconds of any door opened and closed, or brake pedal depressed

      Pulse generation

      (See waveform 3)

      • *1: w/ Entry Function

      • *2: w/o Entry Function

      Tech Tips

      *: Remove the key 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. A003VN3E14

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection

        H1-12 (TXCT) - H1-36 (AGND)*1

        H143-12 (TXCT) - H143-36 (AGND)*2
        Tool Setting 2 V/DIV., 20 ms./DIV.
        Condition After power switch turned off, within 30 seconds of any door opened and closed, or brake pedal depressed

        • *1: w/ Entry Function

        • *2: w/o Entry Function

      2. A003XXZE01
        Text in Illustration
        *a Key held against power switch

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection

        H1-13 (CODE) - H1-36 (AGND)*1

        H143-13 (CODE) - H143-36 (AGND)*2
        Tool Setting 1 V/DIV., 200 ms./DIV.
        Condition After power switch turned off, within 30 seconds of any door opened and closed, or brake pedal depressed, and then key held against power switch*

        • *1: w/ Entry Function

        • *2: w/o Entry Function

        Tech Tips

        *: Remove the key battery before performing this inspection.

      3. A003VELE01

        Waveform 3 (Reference)

        Measurement Condition
        Item Content
        Tester Connection

        H1-28 (VC5) - H1-36 (AGND)*1

        H143-28 (VC5) - H143-36 (AGND)*2
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition After power switch turned off, within 30 seconds of any door opened and closed, or brake pedal depressed

        • *1: w/ Entry Function

        • *2: w/o Entry Function

  3. CHECK ID CODE BOX (IMMOBILISER CODE ECU)

    A003XYHE42

    1. Disconnect the H22 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
      H22-1 (+B) - H22-8 (GND) Input L - W-B +B power supply Power switch off 11 to 14 V B2789
      H22-8 (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 H22 box connector.

    4. Measure the 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
      H22-5 (EFII) - H22-8 (GND) Input L - 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
      H22-5 (EFII) - H22-8 (GND) Input L - 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)
      H22-6 (EFIO) - H22-8 (GND) Output R - 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
      H22-6 (EFIO) - H22-8 (GND) Output R - W-B

      EFI communication output

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

      		 Power switch on (IG)

      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)

        A003XI1E01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 510 ms
        Measurement Condition
        Item Content
        Tester Connection H22-5 (EFII) - H22-8 (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)

        A003ZTPE01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 510 ms
        Measurement Condition
        Item Content
        Tester Connection H22-6 (EFIO) - H22-8 (GND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition Power switch on (IG)

  4. CHECK TRANSMISSION CONTROL ECU ASSEMBLY

    A003VTHE07

    1. Disconnect the A21 and A22 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
      A22-1 (E1) - Body ground - BR - Body ground Ground Always Below 1 Ω -
      A22-5 (E02) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      A22-6 (E01) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      A21-16 (+B) - Body ground Input GR - Body ground +B power supply Power switch off 11 to 14 V -
      A21-15 (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

    A003WH0E01

    1. Measure the 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
      A19-2 (+B2) - H3-5 (E01) Input L - W-B Ignition power supply Power switch on (IG) 11 to 14 V -
      A20-5 (+B1) - H3-5 (E01) Input L - W-B Ignition power supply Power switch on (IG) 11 to 14 V -
      A20-6 (MREL) - H3-5 (E01) Input BE - W-B Ignition power supply Power switch on (IG) 11 to 14 V -
      H3-1 (AM22) - H3-6 (E1) Input W - W-B +B power supply Power switch off 11 to 14 V -
      H3-5 (E01) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      H3-6 (E1) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      H4-4 (E12) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      H4-5 (E02) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      H4-7 (AM21) - H3-6 (E1) Input W - W-B +B power supply Power switch off 11 to 14 V -
      H4-20 (IMO) - H3-6 (E1) Input L - W-B ID code box (immobiliser code ECU) communication input Power switch off 11 to 14 V -
      H4-20 (IMO) - H3-6 (E1) Input L - 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)

      		 -
      H4-21 (IMI) - H3-6 (E1) Output R - W-B ID code box (immobiliser code ECU) communication output Power switch off 11 to 14 V -
      H4-21 (IMI) - H3-6 (E1) Output R - W-B ID code box (immobiliser code ECU) communication output Power switch on (IG)

      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)

        A003XI1E01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 510 ms
        Measurement Condition
        Item Content
        Tester Connection H4-20 (IMO) - H3-6 (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)

        A003XI1E01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 510 ms
        Measurement Condition
        Item Content
        Tester Connection H4-21 (IMI) - H3-6 (E1)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition Power switch on (IG)