SMART ENTRY AND START SYSTEM TERMINALS OF ECU


  1. CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

    A017BEHE15

    1. Disconnect the D6, D7, D8, 1E, 1F and 1M connectors.

    2. Measure the voltage and resistance of the wire harness side connector.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D7-6 (AM1) - Body ground GR - Body ground +B power supply Always 11 to 14 V
      D6-1 (AM2) - Body ground G - Body ground +B power supply Always 11 to 14 V
      D7-16 (SSW2) - Body ground BR - Body ground Engine switch signal Engine switch pushed Below 1 Ω
      D7-16 (SSW2) - Body ground BR - Body ground Engine switch signal Engine switch not pushed 10 kΩ or higher
      D7-17 (SSW1) - Body ground P - Body ground Engine switch signal Engine switch pushed Below 1 Ω
      D7-17 (SSW1) - Body ground P - Body ground Engine switch signal Engine switch not pushed 10 kΩ or higher
      1M-9 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      D8-5 (CANH) - Body ground GR - Body ground CAN Line Always 10 kΩ or higher
      D8-6 (CANL) - Body ground W - Body ground CAN Line Always 10 kΩ or higher
      D8-15 (CANN) - Body ground W - Body ground CAN Line Always 10 kΩ or higher
      D8-16 (CANP) - Body ground Y - Body ground CAN Line Always 10 kΩ or higher
      1F-10 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      1E-7 (LIN1) - Body ground R - Body ground LIN line Always 10 kΩ or higher

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

    3. Reconnect the connectors.

    4. Measure the voltage of the connector.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D6-3 (ACCR) - 1M-9 (GND2) O - W-B

      Starter assist signal

      (ACC cut signal)

      		 Brake pedal depressed, shift lever P position, engine switch is pushed once → on (IG)

      0.1 to 0.8 V*1

      → Output voltage at terminal AM1 or AM2 is -2 V or more.
      D6-11 (IG2D) - 1M-9 (GND2) Y - W-B IG2 signal Engine switch on (IG) Output voltage at terminal AM1 or AM2 is -2 V or more.
      D6-11 (IG2D) - 1M-9 (GND2) Y - W-B IG2 signal Engine switch on (ACC) Below 1 V
      D7-3 (IG1D) - 1M-9 (GND2) SB - W-B IG1 signal Engine switch on (IG) Output voltage at terminal AM1 or AM2 is -2 V or more.
      D7-3 (IG1D) - 1M-9 (GND2) SB - W-B IG1 signal Engine switch on (ACC) Below 1 V
      D7-8 (STR) - 1M-9 (GND2) B - W-B Park/Neutral position switch signal Engine switch on (IG), shift lever except P or N position → P or N position

      Below 2 V → Pulse generation*3

      D7-18 (SLP) - 1M-9 (GND2) O - W-B Steering lock actuator position signal Steering lock is locked

      Pulse generation

      (See waveform 3)
      D7-18 (SLP) - 1M-9 (GND2) O - W-B Steering lock actuator position signal Steering lock is released

      Pulse generation

      (See waveform 3)
      D7-19 (SLR+) - 1M-9 (GND2) Y - W-B Steering lock motor signal Steering lock motor operating Below 1 V
      D7-19 (SLR+) - 1M-9 (GND2) Y - W-B Steering lock motor signal Steering lock motor does not operate Output voltage at terminal AM1 or AM2 is -2 V or more.
      D7-22 (ACCD) - 1M-9 (GND2) GR - W-B ACC signal Engine switch on (ACC) Output voltage at terminal AM1 or AM2 is -2 V or more.
      D7-22 (ACCD) - 1M-9 (GND2) GR - W-B ACC signal Engine switch off Below 1 V
      D7-25 (SWIL) - 1M-9 (GND2) R - W-B Illumination signal Light control switch TAIL or HEAD Output voltage at terminal AM1 or AM2 is -2 V or more.
      D8-8 (TACH) - 1M-9 (GND2) BR - W-B Tachometer signal Engine running

      Pulse generation

      (See waveform 2)
      D8-9 (SPD) - 1M-9 (GND2) R - W-B Vehicle speed signal Engine switch on (IG), rotate rear wheel slowly

      Pulse generation

      (See waveform 1)
      D9-4 (STSW) - 1M-9 (GND2) P - W-B Starter activation request signal Brake pedal depressed, engine switch held on (ST) Output voltage at terminal AM1 or AM2 is -2 V or more.
      D9-6 (STR2) - 1M-9 (GND2) LG - W-B Starter signal (Sub) Brake pedal depressed, shift lever P or N position, engine switch on (ST)

      Output voltage at terminal AM1 or AM2 is -3.5 V or more.*2

      1A-1 (IG) - Body ground B - Body ground IG power supply Always 11 to 14 V
      1M-7 (STP) - 1M-9 (GND2) GR - W-B Stop light signal Brake pedal depressed Output voltage at terminal AM1 or AM2 is -2 V or more.
      1M-7 (STP) - 1M-9 (GND2) GR - W-B Stop light signal Brake pedal released Below 1 V

      Tech Tips

      *1: Voltage is output only when the engine is cranking.

      *2: Voltage is output for 0.3 seconds when the engine is cranking to start. Disconnect the B2 connector from the ECM and starter cut relay before measuring the voltage.

      *3: Remove the starter cut relay before measuring the voltage.

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

    5. Using an oscilloscope, check the signal waveform of the ECU.


      1. A017BIFE01

        Waveform 1

        Waveform 1 (Reference):
        Terminal No. D8-9 (SPD) - 1M-9 (GND2)
        Tool Setting 5 V/DIV., 10 ms./DIV.
        Vehicle Condition Driving at approx. 20 km/h (12 mph)

        Tech Tips

        As the vehicle speed increases, the wavelength shortens.

      2. A017DCBE01

        Waveform 2

        Waveform 2 (Reference):
        Terminal No. D8-8 (TACH) - 1M-9 (GND2)
        Tool Setting 5 V/DIV., 10 ms./DIV.
        Vehicle Condition Engine idling

        Tech Tips

        As the engine revolution speed increases, the wavelength shortens.

      3. A017FCVE01

        Waveform 3

        Waveform 3 (Reference):
        Terminal No. D7-18 (SLP) - 1M-9 (GND2)
        Tool Setting 2 V/DIV., 100 ms./DIV.
        Vehicle Condition Steering lock/unlock

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    A017DQOE10

    1. Disconnect the D36 ECU connector.

    2. Measure the voltage and resistance of the wire harness side connector.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D36-1 (+B) - Body ground B - Body ground +B power supply Always 11 to 14 V
      D36-10 (LIN) - Body ground L - Body ground LIN line Always 10 kΩ or higher
      D36-17 (E) - Body ground B - 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 ECU connector.

    4. Measure the voltage of the connector.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D36-18 (IG) - Body ground G - Body ground Ignition power supply Engine switch on (IG) 11 to 14 V
      D36-18 (IG) - Body ground G - Body ground Ignition power supply Engine switch off Below 1 V

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

  3. CHECK ECM

    A017EO7E26

    1. Disconnect the B1, B2, B3 and D31 ECM connectors.

    2. Measure the voltage and resistance of the wire harness side connectors.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D31-2 (+B2) - Body ground GR - Body ground Power source of ECM Engine switch on (IG) 11 to 14 V
      D31-1 (+B) - Body ground SB - Body ground Power source of ECM Engine switch on (IG) 11 to 14 V
      D31-9 (IGSW) - Body ground W - Body ground Engine switch signal Engine switch on (IG) 11 to 14 V
      B2-3 (ME01) - Body ground W-B - Body ground Ground Always Below 1 Ω
      B1-6 (E02) - Body ground W-B - Body ground Ground Always Below 1 Ω
      B1-7 (E01) - Body ground W-B - Body ground Ground Always Below 1 Ω
      B2-7 (E04) - Body ground W-B - Body ground Ground Always Below 1 Ω
      B2-6 (E05) - Body ground W-B - Body ground Ground Always Below 1 Ω
      B3-1 (E1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      B2-4 (E03) - Body ground W-B - 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 ECM connectors.

    4. Measure the voltage of the connectors.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D31-17 (ACCR) - B3-1 (E1) O - W-B ACC relay cut signal (output) Brake pedal depressed, shift lever P or N position, engine switch is pushed once → on (IG)

      0.1 to 0.8 V*1→ Output voltage at terminal AM1 or AM2 is -2 V or more.
      B3-12 (STSW) - B3-1 (E1) P - W-B Starter activation request signal Brake pedal depressed, engine switch held (IG) Output voltage at terminal AM1 or AM2 is -2 V or more.
      D32-1 (TACH) - B3-1 (E1) B - W-B Engine revolution signal (output) Idling Pulse generation (see waveform 1)
      D31-15 (STP) - B3-1 (E1) R - W-B Stop light switch signal (input) Brake pedal depressed 7.5 to 14 V
      D31-15 (STP) - B3-1 (E1) R - W-B Stop light switch signal (input) Brake pedal released Below 1.5 V
      B3-11 (STA) - B3-1 (E1) B - W-B Starter relay operation signal Cranking 11 to 14 V
      B2-8 (STAR) - B3-1 (E1) GR - W-B Starter signal (Main) Brake pedal depressed, shift lever P or N position, engine switch on (ST) 11 to 14 V

      Tech Tips

      *1: Voltage is output only when the engine is cranking.

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

    5. A017DCBE01

      Using an oscilloscope, check the signal waveform of the ECM.

      Waveform 1 (Reference):
      Terminal No. D32-1 (TACH) - B3-1 (E1)
      Tool Setting 5 V/DIV., 10 ms./DIV.
      Vehicle Condition Engine idling

      Tech Tips

      As the vehicle speed increases, the wavelength shortens.

  4. CHECK STEERING LOCK ECU

    A017DG3E13

    1. Disconnect the D10 ECU connector.

    2. Measure the voltage and resistance of the wire harness side connector.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D10-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      D10-2 (SGND) - Body ground W - Body ground Ground Always Below 1 Ω
      D10-6 (IG2) - Body ground V - Body ground Ignition power supply Engine switch on (IG) 11 to 14 V
      D10-6 (IG2) - Body ground V - Body ground Ignition power supply Engine switch off Below 1 V
      D10-7 (B) - Body ground G - Body ground +B power supply Always 11 to 14 V

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

    3. Reconnect the D10 ECU connector.

    4. Measure the voltage of the connector.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D10-4 (SLP1) - D10-1 (GND) O - W-B Steering lock actuator position signal Steering is locked 11 to 14 V
      D10-4 (SLP1) - D10-1 (GND) O - W-B Steering lock actuator position signal Steering is released Below 1 V

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