IMMOBILISER SYSTEM TERMINALS OF ECU


  1. CHECK POWER SWITCH

    A0004XWE03

    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
      H44-6 (AGND) - Body ground - R - Body ground Transponder key amplifier ground Always Below 1 Ω -
      H44-7 (TXCT) - H44-6 (AGND) Input GR - R 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 -
      H44-8 (CODE) - H44-6 (AGND) Output L - R 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 -
      H44-10 (VC5) - H44-6 (AGND) Input P - R 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
      H44-7 (TXCT) - H44-6 (AGND) Input GR - R

      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
      H44-8 (CODE) - H44-6 (AGND) Output L - R

      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)
      H44-10 (VC5) - H44-6 (AGND) Input P - R

      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 power switch may have a malfunction.

      Tech Tips

      *: Remove the transmitter 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. A0004G6E45

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection H44-7 (TXCT) - H44-6 (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. A0006VEE15
        Text in Illustration
        *a Key held against power switch

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection H44-8 (CODE) - H44-6 (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 transmitter battery before performing this inspection.

      3. A000884E01

        Waveform 3 (Reference)

        Measurement Condition
        Item Content
        Tester Connection H44-10 (VC5) - H44-6 (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)

    A0008LQE02

    1. Disconnect the H194 and A72 certification ECU (smart key ECU assembly) connectors.

    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
      A72-2 (+B) - A72-11 (E) Input W - W-B +B power supply Power switch off 11 to 14 V -
      A72-10 (CUTB) - A72-11 (E) Input L - W-B Stand-by power Power switch off 11 to 14 V -
      A72-11 (E) - Body ground - W-B - Body ground Ground Always Below 1 Ω -

    3. Reconnect the H194 and A72 certification ECU (smart key ECU assembly) connectors.

    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
      H194-5 (IG) - A72-11 (E) Input LG - W-B Ignition power supply Power switch off → on (IG) Below 1 V → 11 to 14 V Ignition Switch
      H194-18 (IND) - A72-11 (E) Output R - W-B Security indicator output Power switch off → on (IG)

      Pulse generation

      → Below 2 V

      		 -
      H194-9 (TXCT) - H194-24 (AGND) Output GR - R 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
      H194-7 (CODE) - H194-24 (AGND) Input L - R 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
      H194-1 (VC5) - H194-24 (AGND) Output P - R 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
      H194-24 (AGND) - Body ground - R - 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
      H194-9 (TXCT) - H194-24 (AGND) Output GR - R

      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
      H194-7 (CODE) - H194-24 (AGND) Input L - R

      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)
      H194-1 (VC5) - H194-24 (AGND) Output P - R

      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

      *: Remove the transmitter 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. A0004G6E45

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection H194-9 (TXCT) - H194-24 (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. A0006VEE15
        Text in Illustration
        *a Key held against power switch

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection H194-7 (CODE) - H194-24 (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 transmitter battery before performing this inspection.

      3. A000884E01

        Waveform 3 (Reference)

        Measurement Condition
        Item Content
        Tester Connection H194-1 (VC5) - H194-24 (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)

    A0007V7E03

    1. Disconnect the H15 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
      H15-1 (+B) - H15-5 (GND) Input R - W-B +B power supply Power switch off 11 to 14 V B2789
      H15-5 (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 H15 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
      H15-3 (EFII) - H15-5 (GND) Input LG - W-B

      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

      • Engine Start Request

      • EFI Code Receive
      H15-3 (EFII) - H15-5 (GND) Input LG - W-B

      EFI communication input

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

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

      Pulse generation

      (See waveform 1)
      H15-4 (EFIO) - H15-5 (GND) Output L - W-B

      EFI communication output

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

      		 Power switch off Below 1 V
      H15-4 (EFIO) - H15-5 (GND) Output L - W-B

      EFI communication output

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

      		 Within 3 seconds of hybrid 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)

        A0004NOE02
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection H15-3 (EFII) - H15-5 (GND)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of hybrid system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected

      2. Waveform 2 (Reference)

        A0004RIE02
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection H15-4 (EFIO) - H15-5 (GND)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of hybrid 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)

    A0003I1E03

    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
      H18-1 (GND) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      H18-3 (IGE) - H18-1 (GND) Input L - 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

      • 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
      H18-4 (SLP1) - H18-1 (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
      H18-6 (IG2) - H18-1 (GND) Input LG - 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
      H18-7 (B) - Body ground Input B - 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. A000888E33
        Text in Illustration
        *a Steering lock motor not operating
        *b Steering lock motor operating

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection H18-3 (IGE) - H18-1 (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 HYBRID VEHICLE CONTROL ECU ASSEMBLY

    A0005DXE02
    Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item/DTC
    A78-1 (+B2) - H211-6 (E1) Input B - BR IG power supply Power switch on (IG) 11 to 14 V -
    A79-4 (+B1) - H211-6 (E1) Input B - BR IG power supply Power switch on (IG) 11 to 14 V -
    A79-6 (MREL) - H211-6 (E1) Input V - BR IG power supply Power switch on (IG) 11 to 14 V -
    H211-5 (E01) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
    H211-6 (E1) - Body ground - BR - Body ground Ground Always Below 1 Ω -
    H212-23 (IMO) - H211-6 (E1) Input LG - BR ID code box (immobiliser code ECU) communication input Power switch off 11 to 14 V -
    H212-23 (IMO) - H211-6 (E1) Input LG - 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 1)

    		 -
    H212-22 (IMI) - H211-6 (E1) Output L - BR ID code box (immobiliser code ECU) communication output Power switch off Below 1 V -
    H212-22 (IMI) - H211-6 (E1) Output L - 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 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)

        A0004NOE02
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection H212-23 (IMO) - H211-6 (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)

        A0004RIE02
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection H212-22 (IMI) - H211-6 (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

  6. RADIO RECEIVER ASSEMBLY (w/ Navigation System)


    1. Disconnect the H97 radio receiver assembly connector.

      A0004XDE03

    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 connector disconnected.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      H97-17 (+B1) - Body ground L - Body ground Auxiliary Battery Power switch off 11 to 14 V
      H97-12 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the H97 radio receiver assembly connector.

    4. Measure the voltage according to the value(s) in the table below.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      H97-37 (SEUC) - Body ground R - Body ground Security indicator light signal

      • Power switch on (IG)

      • Security indicator light off

      		 Below 2 V
      H97-37 (SEUC) - Body ground R - Body ground Security indicator light signal

      • Power switch off

      • Security indicator light blinks

      		 Pulse generation

      If the result is not as specified, the radio receiver assembly may have a malfunction.

  7. RADIO RECEIVER ASSEMBLY (w/o Navigation System)


    1. Disconnect the H178 and H179 radio receiver assembly connectors.

      A0003LVE02

    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 connector disconnected.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      H179-4 (+B1) - Body ground L - Body ground Auxiliary Battery Power switch off 11 to 14 V
      H179-7 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the H178 and H179 radio receiver assembly connectors.

    4. Measure the voltage according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      H178-16 (SEUC) - Body ground R - Body ground Security indicator light signal

      • Power switch on (IG)

      • Security indicator light off

      		 Below 2 V
      H178-16 (SEUC) - Body ground R - Body ground Security indicator light signal

      • Power switch off

      • Security indicator light blinks

      		 Pulse generation

      If the result is not as specified, the radio receiver assembly may have a malfunction.