ENGINE IMMOBILISER SYSTEM(w/ Entry and Start System) TERMINALS OF ECU


  1. CHECK ENGINE SWITCH

    A004H16E02

    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
      D25-6 (AGND) - Body ground - B - Body ground Transponder key amplifier ground Always Below 1 Ω -
      D25-7 (TXCT) - D25-6 (AGND) Input W - B Clock signal Engine switch off, brake pedal*1 or clutch pedal*2 not depressed, and 30 seconds or more after driver door opened and then closed Below 1 V -
      D25-8 (CODE) - D25-6 (AGND) Input/Output R - B Bidirectional data communication Engine switch off, brake pedal*1 or clutch pedal*2 not depressed, and 30 seconds or more after driver door opened and then closed Below 1 V -
      D25-10 (VC5) - D25-6 (AGND) Input G - B Transponder key amplifier power supply Engine switch off, brake pedal*1 or clutch pedal*2 not depressed, and 30 seconds or more after driver door opened and then closed Below 1 V -

      • *1: for Automatic Transmission

      • *2: for Manual Transmission

    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
      D25-7 (TXCT) - D25-6 (AGND) Input W - B Clock signal Engine switch off, key not inside vehicle, and within 30 seconds after engine switch pushed

      Pulse generation

      (See waveform 1)

      • BCC Malfunction

      • Abnormal Status

      • Different Encrypt Code

      • Different Serial Number

      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
      D25-8 (CODE) - D25-6 (AGND) Output R - B Bidirectional data communication Engine switch off, and engine switch pushed while key held against engine switch*

      Pulse generation

      (See waveform 2)
      D25-10 (VC5) - D25-6 (AGND) Input G - B Transponder key amplifier power supply Engine switch off, key not inside vehicle, and within 30 seconds after engine switch pushed

      Pulse generation

      (See waveform 3)

      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. A004I76E59

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection D25-7 (TXCT) - D25-6 (AGND)
        Tool Setting 2 V/DIV., 20 ms./DIV.
        Condition Engine switch off, key not inside vehicle, and within 30 seconds after engine switch pushed
      2. A004HGNE20
        Text in Illustration
        *a Key held against engine switch

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection D25-8 (CODE) - D25-6 (AGND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition Engine switch off, and engine switch pushed while key held against engine switch*

        Tech Tips

        *: Remove the transmitter battery before performing this inspection.

      3. A004HBQE15

        Waveform 3 (Reference)

        Measurement Condition
        Item Content
        Tester Connection D25-10 (VC5) - D25-6 (AGND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition Engine switch off, key not inside vehicle, and within 30 seconds after engine switch pushed

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    A004KL0E02

    1. Disconnect the D48 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
      D48-2 (+B) - D48-11 (GND) Input W - BR +B power supply Always 11 to 14 V -
      D48-11 (GND) - Body ground - BR - Body ground Ground Always Below 1 Ω -

    3. Reconnect the D48 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
      D41-5 (IG2) - D48-11 (GND) Input P - BR Engine switch power supply Engine switch off → on (IG) Below 1 V → 11 to 14 V Ignition Switch
      D41-9 (TXCT) - D41-24 (AGND) Output BE - B Clock signal Engine switch off, brake pedal*1 or clutch pedal*2 not depressed, and 30 seconds or more after driver door opened and then closed Below 1 V

      • BCC Malfunction

      • Abnormal Status

      • Different Encrypt Code

      • Different Serial Number
      D41-7 (CODE) - D41-24 (AGND) Input SB - B Signal input from transponder key amplifier Engine switch off, brake pedal*1 or clutch pedal*2 not depressed, and 30 seconds or more after driver door opened and then closed Below 1 V
      D41-1 (VC5) - D41-24 (AGND) Output W - B Transponder key amplifier power supply Engine switch off, brake pedal*1 or clutch pedal*2 not depressed, and 30 seconds or more after driver door opened and then closed Below 1 V
      D41-24 (AGND) - Body ground - B - Body ground Transponder key amplifier ground Always Below 1 Ω
      D48-13 (EGIO) - D48-11 (GND)*3 Input/Output R - BR EFI communication signal (certification ECU (smart key ECU assembly) to ECM) Engine switch on (IG) 11 to 14 V

      • B1571

      • B1572

      • Engine Start Request

      • EFI Code Receive

      • *1: for Automatic Transmission

      • *2: for Manual Transmission

      • *3: w/o ID Code Box

    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
      D41-9 (TXCT) - D41-24 (AGND) Output BE - B Clock signal Engine switch off, key not inside vehicle, and within 30 seconds after engine switch pushed

      Pulse generation

      (See waveform 1)

      • BCC Malfunction

      • Abnormal Status

      • Different Encrypt Code

      • Different Serial Number
      D41-7 (CODE) - D41-24 (AGND) Input SB - B Signal input from transponder key amplifier Engine switch off, and engine switch pushed while key held against engine switch*1

      Pulse generation

      (See waveform 2)
      D41-1 (VC5) - D41-24 (AGND) Output W - B Transponder key amplifier power supply Engine switch off, key not inside vehicle, and within 30 seconds after engine switch pushed

      Pulse generation

      (See waveform 3)
      D48-13 (EGIO) - D48-11 (GND)*2 Input/Output W - B EFI communication signal (certification ECU (smart key ECU assembly) to ECM) After cranking (after the engine speed reached at 500 r/min).

      Pulse generation

      (See waveform 4)

      • B1571

      • B1572

      • Engine Start Request

      • EFI Code Receive

      • *1: Remove the transmitter battery before performing this inspection.

      • *2: w/o ID Code Box

    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. A004I76E59

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection D41-9 (TXCT) - D41-24 (AGND)
        Tool Setting 2 V/DIV., 20 ms./DIV.
        Condition Engine switch off, key not inside vehicle, and within 30 seconds after engine switch pushed
      2. A004HGNE20
        Text in Illustration
        *a Key held against engine switch

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection D41-7 (CODE) - D41-24 (AGND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition Engine switch off, and engine switch pushed while key held against engine switch*

        Tech Tips

        *: Remove the transmitter battery before performing this inspection.

      3. A004HBQE15

        Waveform 3 (Reference)

        Measurement Condition
        Item Content
        Tester Connection D41-1 (VC5) - D41-24 (AGND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition Engine switch off, key not inside vehicle, and within 30 seconds after engine switch pushed
      4. A004IEYE02

        Waveform 4 (Reference)

        Measurement Condition
        Item Content
        Tester Connection D48-13 (EGIO) - D48-11 (GND)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition After cranking (after the engine speed reached at 500 r/min).

  3. CHECK ID CODE BOX (IMMOBILISER CODE ECU) (w/ ID Code Box)

    A004HSOE02

    1. Disconnect the A30 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
      A30-1 (+B) - A30-5 (GND) Input R-W - B-Y +B power supply Always 11 to 14 V -
      A30-5 (GND) - Body ground - B-Y - Body ground Ground Always Below 1 Ω -

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

    3. Reconnect the A30 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
      A30-4 (IMO1) - A30-5 (GND) Input/Output Y - B-Y EFI communication signal (ID code box (immobiliser code ECU) to ECM) Engine switch on (IG) 11 to 14 V

      • B1571

      • B1572

      • Engine Start Request

      • EFI Code Receive
      EFI communication signal (ID code box (immobiliser code ECU) to ECM) After cranking (after the engine speed reached at 500 r/min).

      Pulse generation

      (See waveform 1)

    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. A004IEYE03

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection A30-4 (IMO1) - A30-5 (GND)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition After cranking (after the engine speed reached at 500 r/min).

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

    A004K2ZE02

    1. Measure the resistance and 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
      D59-1 (GND) - Body ground - B - Body ground Ground Always Below 1 Ω -
      D59-3 (SLR+) - Body ground Input Y - Body ground Steering lock motor activation command signal (motor activation command signal sent from certification ECU (smart key ECU assembly))

      Any door opened when conditions below met, and then steering lock motor activated:


      • Shift lever is in P*1 or N*2

      • Steering lock unlocked in advance by carrying key and turning engine switch on (IG)

      • After above condition met, engine switch turned off

      Pulse generation

      (See waveform 1)

      • Power Supply Short

      • Unlock Request Receive

      • Lock Request Receive
      D59-4 (SLP) - Body ground Output LG - Body ground Steering lock bar position signal (output signal from steering unlock sensor) Steering locked → unlocked*3 11 to 14 V → Below 1.2 V

      • Push Start Error

      • Sensor Value
      D59-6 (IGN1) - Body ground Input BR - Body ground Power source mode signal (IG2 power supply input for entire steering lock actuator assembly) Engine switch off → on (IG) Below 1 V → 11 to 14 V

      • B2788

      • Ignition Switch
      D59-7 (B) - Body ground Input SB - Body ground Power source Always 11 to 14 V B2788

      • *1: for Automatic Transmission

      • *2: for Manual Transmission

      Tech Tips


      • *3: The steering locks when any door is opened with the shift lever in P (for Automatic Transmission) and the engine switch off. The steering unlocks when the engine 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. A004HD7E03
        Text in Illustration
        *a Steering lock motor not operating
        *b Steering lock motor operating

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection D59-3 (SLR+) - D59-1 (GND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition

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


        • Shift lever is in P*

        • Steering lock unlocked in advance by carrying key and turning engine switch on (IG)

        • After above condition met, engine switch turned off

        • *1: for Automatic Transmission

  5. CHECK ECM

    A004HEOE05

    1. Measure the resistance and 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
      A36-4 (E01) - Body ground - B-L - Body ground Ground Always Below 1 Ω -
      A33-2 (BATT) - A36-4 (E01) Input W - B-L +B power supply Always 11 to 14 V -
      A33-1 (+B2) - A36-4 (E01) Input V - B-L +B power supply Engine switch on (IG) 11 to 14 V -
      A34-6 (+B) - A36-4 (E01) Input V - B-L +B power supply Engine switch on (IG) 11 to 14 V -
      A35-25 (IMO) - A36-4 (E01) Input Y - B-L

      ID code box (immobiliser code ECU)*1 or certification ECU (smart key ECU assembly) communication

      ID code box (immobiliser code ECU) communication input

      		 Engine switch on (IG) 11 to 14 V -
      After cranking (after the engine speed reached at 500 r/min).

      Pulse generation

      (See waveform 1)

      		 -

      • *1: w/ ID Code Box

      • *2: w/o ID Code Box

      If the result is not as specified, the ECM may have a malfunction.

    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. A004IEYE03

        Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection A35-25 (IMO) - A36-4 (E01)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition After cranking (after the engine speed reached at 500 r/min).