ENGINE IMMOBILISER SYSTEM(w/ Power Switch) TERMINALS OF ECU


  1. CHECK POWER SWITCH

    A01V127E02

    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
      F42-6 (AGND) - Body ground - B - Body ground Transponder key amplifier ground Always Below 1 Ω -
      F42-7 (TXCT) - F42-6 (AGND) Input BE - B 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 -
      F42-8 (CODE) - F42-6 (AGND) Output SB - B 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 -
      F42-10 (VC5) - F42-6 (AGND) Input W - B 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
      F42-7 (TXCT) - F42-6 (AGND) Input BE - B

      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
      F42-8 (CODE) - F42-6 (AGND) Output SB - B

      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*1

      Pulse generation

      (See waveform 2)
      F42-10 (VC5) - F42-6 (AGND) Input W - B

      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

      *1: 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. A01UY6NE15

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection F42-7 (TXCT) - F42-6 (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. A01V11CE02
        Text in Illustration
        *a Key held against power switch

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection F42-8 (CODE) - F42-6 (AGND)
        Tool Setting 2 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. A01UZJAE01

        Waveform 3 (Reference)

        Measurement Condition
        Item Content
        Tester Connection F42-10 (VC5) - F42-6 (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)

    A01UZFXE02

    1. Disconnect the F47 and F48 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
      F47-5 (+B) - F48-1 (E) Input BE - BR +B power supply Always 11 to 14 V -
      F47-4 (CUTB) - F48-1 (E) Input Y - BR Dark current cut pin Always 11 to 14 V -
      F48-1 (E) - Body ground - BR - Body ground Ground Always Below 1 Ω -

    3. Reconnect the F47 and F48 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
      F47-16 (IG) - F48-1 (E) Input P - BR Ignition power supply Power switch off → on (IG) Below 1 V → 11 to 14 V Ignition Switch
      F47-3 (TXCT) - F48-6 (AGND) Output BE - B 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
      F47-13 (CODE) - F48-6 (AGND) Input SB - B 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
      F47-9 (VC5) - F48-6 (AGND) Output W - B 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
      F48-6 (AGND) - Body ground - B - Body ground Transponder key amplifier ground Always Below 1 Ω

    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
      F47-3 (TXCT) - F48-6 (AGND) Output BE - B

      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
      F47-13 (CODE) - F48-6 (AGND) Input SB - B

      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)
      F47-9 (VC5) - F48-6 (AGND) Output W - B

      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 certification ECU (smart key ECU assembly) may have a malfunction.

      Tech Tips

      *1: 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. A01UY6NE44

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection F47-3 (TXCT) - F48-6 (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. A01V11CE01
        Text in Illustration
        *a Key held against power switch

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection F47-13 (CODE) - F48-6 (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. A01UZJAE01

        Waveform 3 (Reference)

        Measurement Condition
        Item Content
        Tester Connection F47-9 (VC5) - F48-6 (AGND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition Power switch off, key not in cabin, within 30 seconds after power switch pressed

  3. CHECK ID CODE BOX (IMMOBILISER CODE ECU)

    A01UZO0E02

    1. Disconnect the F43 ID code box (immobiliser code 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
      F43-1 (+B) - F43-5 (GND) Input BE - BR +B power supply Power switch off 11 to 14 V B2789
      F43-5 (GND) - Body ground - BR - 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 F43 ID code box (immobiliser code ECU) connector.

    4. Measure the voltage and check the 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
      F43-3 (EFII) - F43-5 (GND) Input LG - BR

      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
      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)
      F43-4 (EFIO) - F43-5 (GND) Output R - BR

      EFI communication output

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

      		 Power switch off Below 1 V
      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)

      • If the result is not as specified, the ID code box (immobiliser code ECU) may have a malfunction.

    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)

        A01UZH2E01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection F43-3 (EFII) - F43-5 (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)

        A01V087E01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection F43-4 (EFIO) - F43-5 (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)

    A01UXV5E02

    1. Measure the voltage, resistance and check the 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
      F44-1 (GND) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      F44-3 (IGE) - F44-1 (GND) Input L - W-B Steering lock motor operation permission signal (motor operation permission signal supplied by power management control ECU)

      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
      F44-4 (SLP1) - F44-1 (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
      F44-6 (IG2) - F44-1 (GND) Input SB - 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
      F44-7 (B) - Body ground Input GR - 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 have a malfunction.

      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. A01V0VGE02
        Text in Illustration
        *a Steering lock motor not operating
        *b Steering lock motor operating

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection F44-3 (IGE) - F44-1 (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

        • Key carried, power switch turned on (IG), steering unlocked, and then power switch turned off

  5. CHECK POWER MANAGEMENT CONTROL ECU

    A01V007E02
    Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item/DTC
    A26-2 (+B2) - F55-6 (E1) Input L - BR IG power supply Power switch on (IG) 11 to 14 V -
    A27-5 (+B1) - F55-6 (E1) Input L - BR IG power supply Power switch on (IG) 11 to 14 V -
    A27-6 (MREL) - F55-6 (E1) Input BE - BR IG power supply Power switch on (IG) 11 to 14 V -
    F55-1 (AM22) - F55-6 (E1) Input B - BR +B power supply Always 11 to 14 V -
    F55-5 (E01) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
    F55-6 (E1) - Body ground - BR - Body ground Ground Always Below 1 Ω -
    F56-5 (E02) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
    F56-7 (AM21) - F55-6 (E1) Input B - BR +B power supply Always 11 to 14 V -
    F56-20 (IMO) - F55-6 (E1) Input LG - BR ID code box (immobiliser code ECU) communication input Power switch off 11 to 14 V -
    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)

    		 -
    F56-21 (IMI) - F55-6 (E1) Output R - BR ID code box (immobiliser code ECU) communication output Power switch off Below 1 V -
    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)

        A01UZH2E01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection F56-20 (IMO) - F55-6 (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)

        A01V087E01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection F56-21 (IMI) - F55-6 (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