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

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  1. A01CB3DE04

    CHECK MAIN BODY ECU


    1. Disconnect the 4A, G50, G49 and G48 ECU connectors.

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

      Tip:

      Measure the values on the wire harness side with the connectors disconnected.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      4A-3 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      G50-5 (CANH) - Body ground G - Body ground CAN line Always 10 kΩ or higher
      G50-6 (CANL) - Body ground W - Body ground CAN line Always 10 kΩ or higher
      G50-16 (CANP) - Body ground B - Body ground CAN line Always 10 kΩ or higher
      G50-15 (CANN) - Body ground W - Body ground CAN line Always 10 kΩ or higher
      G49-1 (AM2) - Body ground G - Body ground +B power supply Always 11 to 14 V
      G48-17 (SSW1) - Body ground P - Body ground Engine switch signal Engine switch pushed Below 1 Ω
      G48-17 (SSW1) - Body ground P - Body ground Engine switch signal Engine switch not pushed 10 kΩ or higher
      4A-20 (LIN1) - Body ground GR - Body ground LIN line Always 10 kΩ or higher
      G48-6 (AM1) - Body ground G - Body ground +B power supply Always 11 to 14 V
      G48-16 (SSW2) - Body ground G - Body ground Engine switch signal Engine switch pushed Below 1 Ω
      G48-16 (SSW2) - Body ground G - Body ground Engine switch signal Engine switch not pushed 10 kΩ or higher

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

    3. Reconnect the 4A, G50, G49 and G48 ECU connectors.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      4K-7 (STP) - 4A-3 (GND2) L - W-B Stop light signal Brake pedal depressed 8 to 14 V
      4K-7 (STP) - 4A-3 (GND2) L - W-B Stop light signal Brake pedal released Below 1 V
      G50-8 (TACH) - 4A-3 (GND2) B - W-B Tachometer signal Engine running

      Pulse generation

      (See waveform 1)
      G48-15 (INDS) - 4A-3 (GND2) Y - W-B Vehicle condition signal Brake pedal depressed, shift lever in P 8 to 14 V
      G51-2 (P) - 4A-3 (GND2) G - W-B Shift lock signal Shift lever in P 8 to 14 V
      G51-2 (P) - 4A-3 (GND2) G - W-B Shift lock signal Shift lever not in P Below 1 V
      G48-22 (ACCD) - 4A-3 (GND2) GR - W-B ACC signal Engine switch on (ACC) 8 to 14 V
      G48-22 (ACCD) - 4A-3 (GND2) GR - W-B ACC signal Engine switch off Below 1 V
      G48-14 (INDW) - 4A-3 (GND2) GR - W-B Warning signal Brake pedal depressed, shift lever in P, engine switch on (ACC, IG) 8 to 14 V
      G51-6 (STR2) - 4A-3 (GND2) SB - W-B Starter signal Brake pedal depressed, shift lever in P or N, engine switch pressed to start engine 8 to 14 V*2
      G48-8 (STR) - 4A-3 (GND2) G - W-B Park/neutral position switch assembly signal Shift lever in P or N Below 1 V
      G50-9 (SPD) - 4A-3 (GND2) B - W-B Vehicle speed signal Engine switch on (IG), rear wheel turned slowly

      Pulse generation

      (See waveform 2)
      G48-18 (SLP) - 4A-3 (GND2) Y - W-B Steering lock actuator position signal Steering lock released

      Pulse generation

      (See waveform 3)
      G48-18 (SLP) - 4A-3 (GND2) Y - W-B Steering lock actuator position signal Steering lock locked

      Pulse generation

      (See waveform 3)
      G49-3 (ACCR) - 4A-3 (GND2) L - W-B Starter assist signal Brake pedal depressed, shift lever in P, engine switch pushed once → on (IG)

      0.1 to 0.8 V

      → 11 to 14 V*1
      G48-19 (SLR+) - 4A-3 (GND2) L - W-B Steering lock motor signal Steering lock motor operating Below 1 V
      G48-19 (SLR+) - 4A-3 (GND2) L - W-B Steering lock motor signal Steering lock motor not operating 11 to 14 V
      G48-3 (IG1D) - 4A-3 (GND2) R - W-B IG1 signal Engine switch on (IG) 8 to 14 V
      G48-3 (IG1D) - 4A-3 (GND2) R - W-B IG1 signal Engine switch on (ACC) Below 1 V
      G49-11 (IG2D) - 4A-3 (GND2) G - W-B IG2 signal Engine switch on (IG) 8 to 14 V
      G49-11 (IG2D) - 4A-3 (GND2) G - W-B IG2 signal Engine switch on (ACC) Below 1 V
      G48-25 (SWIL) - 4A-3 (GND2) SB - W-B Illumination signal Light control switch TAIL or HEAD 8 to 14 V
      G51-4 (STSW) - 4A-3 (GND2) P - W-B Starter activation request signal Brake pedal depressed, engine switch pressed to start engine 8 to 14 V*2

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

      • *2: Voltage is output for 0.3 seconds when the engine is cranking. Disconnect the D1 (for 2GR-FE) or D41 (for 2AZ-FE) connector from the ECM 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. A01CAW4E01

        Waveform 1

        Table 1. Waveform 1 (Reference)
        Tester Connection G50-8 (TACH) - 4A-3 (GND2)
        Tool Setting 5 V/DIV., 10 ms./DIV.
        Vehicle Condition Engine idling
        Tip:

        As the engine revolution speed increases, the wavelength shortens.

      2. A01CFVJE01

        Waveform 2

        Table 2. Waveform 2 (Reference)
        Tester Connection G50-9 (SPD) - 4A-3 (GND2)
        Tool Setting 5 V/DIV., 10 ms./DIV.
        Vehicle Condition Driving at approx. 20 km/h (12 mph)
        Tip:

        As the vehicle speed increases, the wavelength shortens.

      3. A01CAKXE01

        Waveform 3

        Table 3. Waveform 3 (Reference)
        Tester Connection G48-18 (SLP) - 4A-3 (GND2)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Vehicle Condition Steering lock/unlock
  2. A01CCEFE01

    CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Disconnect the G20 ECU connector.

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

      Tip:

      Measure the values on the wire harness side with the connector disconnected.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      G20-1 (+B) - Body ground R - Body ground +B power supply Always 11 to 14 V
      G20-10 (LIN) - Body ground GR - Body ground LIN line Always 10 kΩ or higher
      G20-17 (E) - 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. A01CE24E03

    CHECK ECM


    1. Disconnect the A8 and D1*1 or D41*2 ECM connectors.


      • *1: 2GR-FE

      • *2: 2AZ-FE

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

      Tip:

      Measure the values on the wire harness side with the connectors disconnected.

      Table 4. 2GR-FE
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D1-21 (E02) - Body ground W-B - Body ground Ground Always Below 1 Ω
      D1-22 (E01) - Body ground BR - Body ground Ground Always Below 1 Ω
      A8-1 (+B2) - Body ground P - Body ground Power source of ECM Engine switch on (IG) 11 to 14 V
      A8-2 (+B) - Body ground B - Body ground Power source of ECM Engine switch on (IG) 11 to 14 V
      A8-28 (IGSW) - Body ground L - Body ground IG signal Engine switch on (IG) 11 to 14 V
      D1-20 (ME01) - Body ground BR - Body ground Ground Always Below 1 Ω
      D1-104 (E03) - Body ground BR - Body ground Ground Always Below 1 Ω
      D1-81 (E1) - Body ground BR- Body ground Ground Always Below 1 Ω
      D1-46 (E05) - Body ground BR - Body ground Ground Always Below 1 Ω
      D1-23 (E04) - Body ground W-B - Body ground Ground Always Below 1 Ω
      Table 5. 2AZ-FE
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D41-44 (E02) - Body ground BR - Body ground Ground Always Below 1 Ω
      D41-45 (E01) - Body ground BR - Body ground Ground Always Below 1 Ω
      A8-1 (+B2) - Body ground P - Body ground Power source of ECM Engine switch on (IG) 11 to 14 V
      A8-2 (+B) - Body ground B - Body ground Power source of ECM Engine switch on (IG) 11 to 14 V
      A8-28 (IGSW) - Body ground L - Body ground IG signal Engine switch on (IG) 11 to 14 V
      D41-43 (ME01) - Body ground BR - Body ground Ground Always Below 1 Ω
      D41-86 (E03) - Body ground BR - Body ground Ground Always Below 1 Ω
      D41-104 (E1) - Body ground BR - Body ground Ground Always Below 1 Ω
      D41-46 (E04) - Body ground BR - 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 A8 and D1*1 or D41*2 ECM connectors.


      • *1: 2GR-FE

      • *2: 2AZ-FE

    4. The values listed under "Specified Condition" are reference values. Because waterproof connectors are used for the ECM, inspections can not be performed with the connectors connected.

      Table 6. 2GR-FE
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      A8-13 (ACCR) - D1-81 (E1) GR - BR ACC relay cut signal (output) Engine switch on (IG) 11 to 14 V
      A8-48 (STA) - D1-81 (E1) LG - BR ST relay operation signal Cranking 11 to 14 V
      A8-36 (STP) - D1-81 (E1) R - BR Stop light switch assembly signal (input) Brake pedal depressed 7.5 to 14 V
      A8-36 (STP) - D1-81 (E1) R - BR Stop light switch assembly signal (input) Brake pedal released Below 1.5 V
      A8-15 (TACH) - D1-81 (E1) B - BR Engine revolution signal (output) Idling Pulse generation (see waveform 1)
      D1-63 (STAR) - D1-81 (E1) G-R - BR PNP switch signal (input) Engine switch on (IG), shift position P or N 11 to 14 V
      Table 7. 2AZ-FE
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      A8-13 (ACCR) - D41-104 (E1) GR - BR ACC relay cut signal (output) Engine switch on (IG) 11 to 14 V
      A8-48 (STA) - D41-104 (E1) LG - BR ST relay operation signal Cranking 11 to 14 V
      A8-36 (STP) - D41-104 (E1) R - BR Stop light switch assembly signal (input) Brake pedal depressed 7.5 to 14 V
      A8-36 (STP) - D41-104 (E1) R - BR Stop light switch assembly signal (input) Brake pedal released Below 1.5 V
      A8-15 (TACH) - D41-104 (E1) B - BR Engine revolution signal (output) Idling Pulse generation (see waveform 1)
      D41-52 (STAR) - D41-104 (E1) LG - BR ST relay operation signal Cranking 11 to 14 V
    5. A01CAW4E01

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

      Table 8. Waveform 1 (Reference)
      Tester Connection

      A8-15 (TACH) - D1-81 (E1)*1

      A8-15 (TACH) - D41-104 (E1)*2
      Tool Setting 5 V/DIV., 10 ms./DIV.
      Vehicle Condition Engine idling
      Tip:

      As the engine revolution speed increases, the wavelength shortens.

      *1: 2GR-FE

      *2: 2AZ-FE

  4. A01CFA7E20

    CHECK STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)


    1. Disconnect the G22 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
      G22-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      G22-2 (SGND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      G22-6 (IG2) - Body ground B - Body ground Power supply Engine switch on (IG) 11 to 14 V
      G22-6 (IG2) - Body ground B - Body ground Power supply Engine switch off Below 1 V
      G22-7 (B) - Body ground B - Body ground +B power supply Always 11 to 14 V

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

    3. Reconnect the G22 ECU connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      G22-4 (SLP1) - G22-1 (GND) Y - W-B Steering lock actuator position signal Steering is locked 11 to 14 V
      G22-4 (SLP1) - G22-1 (GND) Y - 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.