SMART ENTRY AND START SYSTEM (for Start Function) TERMINALS OF ECU


  1. CHECK POWER MANAGEMENT CONTROL ECU

    A01ELG9E02

    1. Disconnect the D42 and D43 connectors.

    2. Measure the voltage and resistance according to the value(s) in the table below.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D42-2 (STA) - Body ground P - Body ground Starter relay operation signal Always 93.8 to 136.4 Ω
      D42-3 (STAR) - Body ground G - Body ground Park neutral position switch signal Shift lever in P or N 93.8 to 136.4 Ω
      D42-3 (STAR) - Body ground G - Body ground Park neutral position switch signal Shift lever in except P or N 10 kΩ or higher
      D42-8 (IG2D) - Body ground GR - Body ground IG2 relay operation signal Always 131 to 230 Ω
      D42-11 (STP1) - Body ground V - Body ground Stop light switch signal Brake pedal depressed 11 to 14 V
      D42-11 (STP1) - Body ground V - Body ground Stop light switch signal Brake pedal released Below 1 V
      D43-1 (AM22) - Body ground LG - Body ground +B power supply Always 11 to 14 V
      D43-2 (AM21) - Body ground Y - Body ground +B power supply Always 11 to 14 V
      D43-3 (SLP) - Body ground G - Body ground Steering lock actuator position signal Always 10 kΩ or higher
      D43-5 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      D43-6 (GND) - Body ground W - Body ground Ground Engine switch not pushed 10 kΩ or higher
      D43-8 (SLR+) - Body ground R - Body ground Steering lock motor signal Always 10 kΩ or higher
      D43-11 (CA3N) - Body ground W - Body ground CAN communication line Always 10 kΩ or higher
      D43-12 (CA3P) - Body ground G - Body ground CAN communication line Always 10 kΩ or higher
      D43-13 (CA1L) - Body ground W - Body ground CAN communication line Always 10 kΩ or higher
      D43-14 (CA1H) - Body ground Y - Body ground CAN communication line Always 10 kΩ or higher
      D43-17 (SSW2) - Body ground V - Body ground Engine switch signal Engine switch pushed Below 1 Ω
      D43-17 (SSW2) - Body ground V - Body ground Engine switch signal Engine switch not pushed 10 kΩ or higher
      D43-18 (SSW1) - Body ground L - Body ground Engine switch signal Engine switch pushed Below 1 Ω
      D43-20 (IG1D) - Body ground V - Body ground IG1 relay operation signal Always 50.625 to 61.875 Ω
      D43-24 (LIN2) - Body ground BR - Body ground LIN communication 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 D42 and D43 connectors.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D42-4 (NE) - D43-6 (GND) GR - W Crankshaft position sensor signal Idling with warm engine

      Pulse generation

      (See waveform 1)
      D42-8 (IG2D) - D43-6 (GND) GR - W IG2 signal Engine switch on (IG) Output voltage at terminal AM21 or AM22 is -2 V or more
      D42-8 (IG2D) - D43-6 (GND) GR - W IG2 signal Engine switch on (ACC) Below 1 V
      D43-3 (SLP) - D43-6 (GND) G - W Steering lock actuator signal Steering lock released

      Pulse generation

      (See waveform 2)
      D43-3 (SLP) - D43-6 (GND) G - W Steering lock actuator signal

      Shift lever in P

      Steering lock locked

      Pulse generation

      (See waveform 2)
      D43-8 (SLR+) - D43-6 (GND) R - W Steering motor signal Steering lock motor operating Below 1 V
      D43-8 (SLR+) - D43-6 (GND) R - W Steering motor signal Steering lock motor not operating 11 to 14 V
      D43-10 (INDW) - D43-6 (GND) GR - W Warning signal Brake pedal depressed, shift lever in P, engine switch on (ACC, IG) 8 to 14 V
      D43-16 (P) - D43-6 (GND) R - W Shift lock signal Shift lever in P 8 to 14 V
      D43-16 (P) - D43-6 (GND) R - W Shift lock signal Shift lever not in P Below 1 V
      D43-17 (SSW2) - D43-6 (GND) V - W Engine switch signal Engine switch not pushed Output voltage at terminal AM21 or AM22 is -2 V or more
      D43-17 (SSW2) - D43-6 (GND) V - W Engine switch signal Engine switch pushed Below 1 V
      D43-18 (SSW1) - D43-6 (GND) L - W Engine switch signal Engine switch not pushed Output voltage at terminal AM21 or AM22 is -2 V or more
      D43-18 (SSW1) - D43-6 (GND) L - W Engine switch signal Engine switch pushed Below 1 V
      D43-19 (ACCD) - D43-6 (GND) G - W ACC signal Engine switch on (ACC) 8 to 14 V
      D43-19 (ACCD) - D43-6 (GND) G - W ACC signal Engine switch off Below 1 V
      D43-20 (IG1D) - D43-6 (GND) V - W IG1 signal Engine switch on (IG) 8 to 14 V
      D43-20 (IG1D) - D43-6 (GND) V - W IG1 signal Engine switch on (ACC) Below 1 V
      D43-22 (INDS) - D43-6 (GND) Y - W Vehicle condition signal Brake pedal depressed, shift lever in P 8 to 14 V
      D43-23 (SPD) - D43-6 (GND) L - W Vehicle speed signal Engine switch on (IG), wheel rotated slowly

      Pulse generation

      (See waveform 3)

      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. A01EMSIE01

        Waveform 1

        Tester Connection D42-4 (NE) - D43-6 (GND)
        Tool Setting 5 V/DIV., 2 ms./DIV.
        Vehicle Condition Idling with warm engine

        Tech Tips

        The wavelength becomes shorter as the engine speed increases.

      2. A01EMILE01

        Waveform 2

        Tester Connection D43-3 (SLP) - D43-6 (GND)
        Tool Setting 2 V/DIV., 100 ms./DIV.
        Vehicle Condition Steering lock/unlock
      3. A01EKJVE01

        Waveform 3

        Tester Connection D43-23 (SPD) - D43-6 (GND)
        Tool Setting 5 V/DIV., 10 ms./DIV.
        Vehicle Condition Driving at approx. 20 km/h (12 mph)

        Tech Tips

        The wavelength becomes shorter as the vehicle speed increases.

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    A01ELMIE08

    1. Disconnect the D25 connector.

    2. Measure the voltage and resistance according to the value(s) in the table below.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D25-1 (+B) - Body ground G - Body ground +B power supply Always 11 to 14 V
      D25-11 (SWIL) - Body ground R - Body ground Illumination signal Light control switch tail or head 8 to 14 V
      D25-15 (E)- Body ground B - Body ground Ground Always Below 1 Ω
      D25-16 (IG) - Body ground R - Body ground IG power supply Engine switch on (IG) 11 to 14 V
      D25-29 (LIN) - Body ground P - Body ground LIN communication 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 D25 connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D25-11 (SWIL) - Body ground R - Body ground Illumination signal Light control switch tail or head 8 to 14 V

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

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

    A01EJ9LE29

    1. Disconnect the D17 ECU connector.

    2. Measure the voltage and resistance according to the value(s) in the table below.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D17-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      D17-6 (IG2) - Body ground LG - Body ground Ignition power supply Engine switch on (IG) 11 to 14 V
      D17-6 (IG2) - Body ground LG - Body ground Ignition power supply Engine switch off Below 1 V
      D17-7 (B) - Body ground P - 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 D17 ECU connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D17-4 (SLP1) - D17-1 (GND) V - W-B Steering lock actuator position signal Steering locked 11 to 14 V
      D17-4 (SLP1) - D17-1 (GND) V - W-B Steering lock actuator position signal Steering released Below 1 V

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