IMMOBILISER SYSTEM TERMINALS OF ECU


  1. CHECK POWER SWITCH

    A01MU1UN17

    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
      K50-6 (AGND) - Body ground - LG - Body ground Transponder key amplifier ground Always Below 1 Ω -
      K50-7 (TXCT) - K50-6 (AGND) Input G - LG 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 -
      K50-8 (CODE) - K50-6 (AGND) Output B - LG 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 -
      K50-10 (VC5) - K50-6 (AGND) Input BE - LG 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
      K50-7 (TXCT) - K50-6 (AGND) Input G - LG

      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 verification communication is not performed correctly, the malfunction may be indicated by one or more of the Data List items listed above
      K50-8 (CODE) - K50-6 (AGND) Output B - LG

      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)
      K50-10 (VC5) - K50-6 (AGND) Input BE - LG

      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 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. A01MSLHN18

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection K50-7 (TXCT) - K50-6 (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. A01MS60N03

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection K50-8 (CODE) - K50-6 (AGND)
        Tool Setting 2 V/DIV., 20 ms./DIV.
        Condition Power switch off, power switch pressed with key held near power switch*

        Tech Tips

        *: Remove the transmitter battery before performing this inspection.

      3. A01MS6YN05

        Waveform 3 (Reference)

        Measurement Condition
        Item Content
        Tester Connection K50-10 (VC5) - K50-6 (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)

    A01MRXYN98

    1. Disconnect the K137 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
      K137-10 (+B) - K137-11 (E) Input BE - BR +B power supply Power switch off 11 to 14 V -
      K137-11 (E) - Body ground - BR - Body ground Ground Always Below 1 Ω -

    3. Reconnect the K137 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
      K137-14 (TXCT) - K137-13 (AGND) Output G - LG 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
      K137-13 (CODE) - K137-12 (AGND) Input B - LG 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
      K137-15 (VC5) - K137-12 (AGND) Output BE - LG 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
      K137-12 (AGND) - Body ground - LG - Body ground Transponder key amplifier ground Always Below 1 Ω
      K137-19 (IND) - K137-11 (E) Output G - BR 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
      K137-14 (TXCT) - K137-12 (AGND) Output G - LG

      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
      K137-13 (CODE) - K137-12 (AGND) Input B - LG

      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)
      K137-15 (VC5) - K137-12 (AGND) Output BE - LG

      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 transmitter battery before performing this inspection.

    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. A01MSLHN19

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection K137-14 (TXCT) - K137-12 (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. A01MS60N04

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection K137-13 (CODE) - K137-12 (AGND)
        Tool Setting 2 V/DIV., 20 ms./DIV.
        Condition Power switch off, power switch pressed with key held near power switch*

        Tech Tips

        *: Remove the transmitter battery before performing this inspection.

      3. A01MS6YN06

        Waveform 3 (Reference)

        Measurement Condition
        Item Content
        Tester Connection K137-15 (VC5) - K137-12 (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)

    A01MTFHN18

    1. Disconnect the K83 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
      K83-1 (+B) - Body ground Input G - Body ground +B power supply Power switch off 11 to 14 V B2789
      K83-5 (GND) - Body ground - BR - Body ground Ground Always Below 1 Ω B2789

    3. Reconnect the K83 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
      K83-3 (EFII) - K83-5 (GND) Input W - BR

      EFI communication input

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

      		 Power switch off 11 to 14 V

      • B2799-790

      • B279A

      • EFI Code Receive

      • Engine Start Request
      K83-4 (EFIO) - K83-5 (GND) Output P - BR

      EFI communication output

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

      		 Power switch off 11 to 14 V
      K83-3 (EFII) - K83-5 (GND) Input W - BR

      EFI communication input

      (Signal input from hybrid vehicle control ECU assembly 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)
      K83-4 (EFIO) - K83-5 (GND) Output P - BR

      EFI communication output

      (Signal output from ID code box (immobiliser code ECU) to hybrid vehicle control 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 2)

    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)

        A01MRVTC03
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection K83-3 (EFII) - K83-5 (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 auxiliary battery cable disconnected and reconnected

      2. Waveform 2 (Reference)

        A01MRREC02
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection K83-4 (EFIO) - K83-5 (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 auxiliary battery cable disconnected and reconnected

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

    A01MSYCN37

    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
      K28-1 (GND) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      K28-3 (IGE) - K28-1 (GND) Input W - 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

      • Electrical key transmitter sub-assembly 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
      K28-4 (SLP1) - K28-1 (GND) Output R - W-B Steering lock bar position signal (signal output from steering unlock sensor) Steering locked → unlocked* 11 to 14 V → Below 1.5 V Sensor Value
      K28-6 (IG2) - K28-1 (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
      K28-7 (B) - Body ground Input G - Body ground Constant power supply Power switch off 11 to 14 V B2788

      Tech Tips

      *: 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. 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. A01MSJRC03
        *a Steering lock motor not operating
        *b Steering lock motor operating

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection K28-3 (IGE) - K28-1 (GND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition

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


        • Shift lever in P

        • Electrical key transmitter sub-assembly carried, power switch turned on (IG), steering unlocked, and then power switch turned off

  5. CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY

    A01MTBCN39

    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
      A84-1 (+B2) - A84-5 (E01) Output L - W-B Ignition power supply Power switch on (IG) 11 to 14 V -
      A84-3 (IG2) - A84-5 (E01) Output LG - W-B ACC power supply Power switch on (ACC) 11 to 14 V -
      A84-5 (E01) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      K141-6 (E1) - Body ground - BR - Body ground Ground Always Below 1 Ω -
      K142-4 (E12) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      K142-5 (E02) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      K142-23 (IMO) - K141-6 (E1) Output W - BR ID code box (immobiliser code ECU) communication output Power switch off 11 to 14 V -
      K142-23 (IMO) - K141-6 (E1) Output W - BR 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 1)

      		 -
      K142-22 (IMI) - K141-6 (E1) Input P - BR ID code box (immobiliser code ECU) communication input Power switch off 11 to 14 V -
      K142-22 (IMI) - K141-6 (E1) Input P - BR 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 2)

      		 -

    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)

        A01MRVTC03
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection K142-23 (IMO) - K141-6 (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)

        A01MRREC02
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection K142-22 (IMI) - K141-6 (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