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Terminals Of ECM

  1. SFI SYSTEM 
    Fig 1: Identifying ECM B1, B2, B3, D36 And D35 Connector Terminals
    G06111370Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    The standard normal voltage between each pair of the ECM terminals is shown in the table below. The appropriate conditions for checking each pair of the terminals are also indicated.

    The check results should be compared with the standard normal voltage for that pair of terminals, listed in the "Specified Condition" column.

    The illustration above can be used as a reference to identify the ECM terminal locations.

    TERMINAL DESCRIPTION CHART

    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    D35-1 (+B) - B3-1 (E1) SB - W-B Power source of ECM Ignition switch on (IG) 9 to 14 V
    D35-2 (+B2) - B3-1 (E1) GR - W-B Power source of ECM Ignition switch on (IG) 9 to 14 V
    D35-3 (BATT) - B3-1 (E1) R - W-B Battery (for measuring the battery voltage and for the ECM memory) Always 9 to 14 V
    D35-5 (VPMP) - B3-1 (E1) W - W-B Vent valve operation signal (built into pump module) Ignition switch on (IG) 9 to 14 V
    D35-6 (MPMP) - B3-1 (E1) G - W-B Vacuum pump operation signal (built into pump module) Vacuum pump OFF 0 to 3 V
    D35-6 (MPMP) - B3-1 (E1) G - W-B Vacuum pump operation signal (built into pump module) Vacuum pump ON 9 to 14 V
    D35-7 (+BM) - B3-1 (E1) L - W-B Power source of ETCS throttle motor Always 9 to 14 V
    D35-8 (MREL) - B3-1 (E1) L - W-B EFI relay operation signal Ignition switch on (IG) 9 to 14 V
    D35-9 (IGSW) - B3-1 (E1) W - W-B Ignition switch signal Ignition switch on (IG) 9 to 14 V
    D35-10 (FC) - B3-1 (E1) P - W-B C/OPEN relay operation signal (fuel pump control) Ignition switch on (IG) 9 to 14 V
    D35-15 (STP) - B3-1 (E1) R - W-B Stop light switch signal Brake pedal depressed 7.5 to 14 V
    D35-15 (STP) - B3-1 (E1) R - W-B Stop light switch signal Brake pedal released Below 1.5 V
    D35-16 (ST1-) - B3-1 (E1) LG - W-B Stop light switch signal (opposite to STP terminal) Ignition switch on (IG), Brake pedal depressed Below 1.5 V
    D35-16 (ST1-) - B3-1 (E1) LG - W-B Stop light switch signal (opposite to STP terminal) Ignition switch on (IG), Brake pedal released 7.5 to 14 V
    D35-17 (ACCR)(2) - B3-1 (E1) O - W-B ACC relay control signal Cranking Below 1.5 V
    D35-18 (VPA) - D35-20 (EPA) GR - SB Accelerator pedal position sensor signal (for engine control) Ignition switch on (IG), Accelerator pedal fully released 0.5 to 1.1 V
    D35-18 (VPA) - D35-20 (EPA) GR - SB Accelerator pedal position sensor signal (for engine control) Ignition switch on (IG), Accelerator pedal fully depressed 2.6 to 4.5 V
    D35-19 (VPA2) - D35-21 (EPA2) R - V Accelerator pedal position sensor signal (for sensor malfunction detection) Ignition switch on (IG), Accelerator pedal fully released 1.2 to 2.0 V
    D35-19 (VPA2) - D35-21 (EPA2) R - V Accelerator pedal position sensor signal (for sensor malfunction detection) Ignition switch on (IG), Accelerator pedal fully depressed 3.4 to 5.0 V
    D35-22 (PPMP) - B1-28 (E2) B - BR Pressure sensor signal (built into pump module) Ignition switch on (IG) 3 to 3.6 V
    D35-23 (TC) - B3-1 (E1) L - W-B Terminal TC of DLC3 Ignition switch on (IG) 9 to 14 V
    D35-26 (VCPA) - D35-20 (EPA) SB - SB Power source of accelerator pedal position sensor (for VPA) Ignition switch on (IG) 4.5 to 5.0 V
    D35-27 (VCP2) - D35-21 (EPA2) LG - V Power source of accelerator pedal position sensor (for VPA2) Ignition switch on (IG) 4.5 to 5.0 V
    D36-1 (TACH) - B3-1 (E1) B - W-B Engine speed signal (for combination meter) Idling Pulse generation (see waveform 12  l)
    D36-8 (SPD) - B3-1 (E1) LG - W-B Vehicle speed signal from combination meter Ignition switch on (IG), driving wheel rotated slowly Pulse generation (see waveform 9  i)
    D36-30 (W) - B3-1 (E1) Y - W-B Malfunction Indicator Lamp (MIL) operation signal Ignition switch on (IG) Below 3.0 V
    D36-30 (W) - B3-1 (E1) Y - W-B Malfunction Indicator Lamp (MIL) operation signal Idling 9 to 14 V
    D36-33 (CANH) - B3-1 (E1) B - W-B CAN communication circuit Ignition switch on (IG) Pulse generation (see waveform 13  m)
    D36-34 (CANL) - B3-1 (E1) W - W-B CAN communication circuit Ignition switch on (IG) Pulse generation (see waveform 14  n)
    B3-1 (E1) - Body ground W - B -- Earth (ground) circuit of ECM Always Below 1 V
    B3-2 (#10) - B1-7 (E01) L - W-B Fuel injector operation signal Ignition switch on (IG) 9 to 14 V
    B3-3 (#20) - B1-7 (E01) Y - W-B
    B3-4 (#30) - B1-7 (E01) B - W-B
    B3-5 (#40) - B1-7 (E01) W - W-B
    B3-6 (#50) - B1-7 (E01) R - W-B
    B3-7 (#60) - B1-7 (E01) G - W-B
    B3-2 (#10) - B1-7 (E01) L - W-B Fuel injector operation signal Idling Pulse generation (see waveform 3  c)
    B3-3 (#20) - B1-7 (E01) Y - W-B
    B3-4 (#30) - B1-7 (E01) B - W-B
    B3-5 (#40) - B1-7 (E01) W - W-B
    B3-6 (#50) - B1-7 (E01) R - W-B
    B3-7 (#60) - B1-7 (E01) G - W-B
    B2-8 (STAR) - B3-1 (E1) GR - W-B Park/neutral position switch signal Ignition switch on (IG), Shift lever position P or N 9 to 14 V
    B3-11 (STA) - B3-1 (E1) B - W-B Starter relay operation signal Cranking 9 to 14 V
    B3-12 (STSW)(2) - B3-1 (E1) P - W-B Starter relay operation signal Cranking 9 to 14 V
    B3-14 (OC2-) - B3-15 (OC2+) P - LG Camshaft timing oil control valve operation signal (Intake side) Ignition switch on (IG) Pulse generation (see waveform 1  a)
    B3-16 (OC1-) - B3-17 (OC1+) L - Y Camshaft timing oil control valve operation signal (Intake side) Ignition switch on (IG) Pulse generation (see waveform 1  a)
    B3-18 (VV2+) - B3-28 (VV2-) P - L Variable valve timing sensor signal (Intake side) Idling Pulse generation (see waveform 6  f)
    B3-19 (VV1+) - B3-29 (VV1-) G - R Variable valve timing sensor signal (Intake side) Idling Pulse generation (see waveform 6  f)
    B3-21 (NE+) - B3-20 (NE-) W - B Crankshaft position sensor signal Idling Pulse generation (see waveform 5  e)
    B3-23 (EV2+) - B3-22 (EV2-) L - R Variable valve timing sensor signal (Exhaust side) Idling Pulse generation (see waveform 5  e)
    B3-25 (EV1+) - B3-24 (EV1-) B - W Variable valve timing sensor signal (Exhaust side) Idling Pulse generation (see waveform 5  e)
    B3-26 (OE1+) - B3-31 (OE1-) G - R Camshaft timing oil control valve operation signal (Intake side) Ignition switch on (IG) Pulse generation (see waveform 1  a)
    B3-27 (OE2+) - B3-32 (OE2-) P - W Camshaft timing oil control valve operation signal (Intake side) Ignition switch on (IG) Pulse generation (see waveform 1  a)
    B3-30 (FPR) - B3-1 (E1) G - W-B Fuel pump control Cranking 9 to 14 V
    Idling Below 3 V
    B1-1 (HT1B) - B3-1 (E1) R - W-B Heated oxygen sensor heater operation signal Idling Below 3.0 V
    B1-1 (HT1B) - B3-1 (E1) R - W-B Heated oxygen sensor heater operation signal Ignition switch on (IG) 9 to 14 V
    B1-3 (ACM) - B3-1 (E1) G - W-B VSV for active control mount system operation signal Ignition switch on (IG) 9 to 14 V
    B1-4 (M-) - B2-3 (ME01) L - W-B Throttle drive motor operation signal (negative terminal) Idling with warm engine Pulse generation (see waveform 11  k)
    B1-5 (M+) - B2-3 (ME01) R - W-B Throttle drive motor operation signal (positive terminal) Idling with warm engine Pluse generation (see waveform 10  j)
    B1-6 (E02) - Body ground W - B -- Earth (ground) circuit of ECM Always Below 1 V
    B1-7 (E01) - Body ground W - B -- Earth (ground) circuit of ECM Always Below 1 V
    B1-8 (IGT1) - B3-1 (E1) Y - W-B Ignition coil with igniter (ignition signal) Idling Pulse generation (see waveform 7  g)
    B1-9 (IGT2) - B3-1 (E1) P - W-B
    B1-10 (IGT3) - B3-1 (E1) G - W-B
    B1-11 (IGT4) - B3-1 (E1) L - W-B
    B1-12 (IGT5) - B3-1 (E1) B - W-B
    B1-13 (IGT6) - B3-1 (E1) BR - W-B
    B1-17 (GE01) - B3-1 (E1) - - W - B Shielded earth (ground) circuit of throttle drive motor Always Below 1 V
    B1-18 (OX1B) - B1-28 (E2) B - BR Heated oxygen sensor signal With engine speed at 2500 rpm for 2 minutes after warming up Pulse generation (see waveform 2  b)
    B1-19 (VTA2) - B1-28 (E2) LG - BR Throttle position sensor signal (for sensor malfunction detection) Ignition switch on (IG), Accelerator pedal fully released 2.1 to 3.1 V
    B1-19 (VTA2) - B1-28 (E2) LG - BR Throttle position sensor signal (for sensor malfunction detection) Ignition switch on (IG), Accelerator pedal fully depressed 4.5 to 5.0 V
    B1-20 (VTA1) - B1-28 (E2) B - BR Throttle position sensor signal (for engine control) Ignition switch on (IG), Throttle valve fully closed 0.5 to 1.2 V
    B1-20 (VTA1) - B1-28 (E2) B - BR Throttle position sensor signal (for engine control) Ignition switch on (IG), Throttle valve fully open 3.2 to 4.8 V
    B1-21 (THW) - B1-28 (E2) W - BR Engine coolant temperature sensor signal Idling, Engine coolant temperature 80°C (176°F) 0.2 to 1.0 V
    B1-22 (THA) - B1-29 (E2G) P - Y Intake air temperature sensor signal Idling, Intake air temperature 20°C (68°F) 0.5 to 3.4 V
    B1-23 (VC) - B1-28 (E2) R - BR Power source of sensors (specific voltage) Ignition switch on (IG) 4.5 to 5.0 V
    B1-24 (IGF1) - B3-1 (E1) W - W-B Ignition coil with igniter (ignition confirmation signal) Ignition switch on (IG) 4.5 to 5.0 V
    B1-24 (IGF1) - B3-1 (E1) W - W-B Ignition coil with igniter (ignition confirmation signal) Idling Pulse generation (see waveform 7  g)
    B1-27 (AICV) - B3-1 (E1) W - W-B VSV for air intake control system operation signal Ignition switch on (IG) 9 to 14 V
    B1-28 (E2) - B3-1 (E1) BR - W-B Earth (ground) circuit of sensors for ETCS Always Below 1 V
    B1-29 (E2G) - B3-1 (E1) Y - W-B Earth (ground) circuit of sensor for mass air flow meter Always Below 1 V
    B1-30 (VG) - B1-29 (E2G) R - Y Mass air flow meter signal Idling, Shift lever position P or N, A/C switch OFF 0.5 to 3.0 V
    B1-33 (ACIS) - B3-1 (E1) L - W-B VSV for acoustic control induction system operation signal Ignition switch on (IG) 9 to 14 V
    B1-34 (PRG) - B3-1 (E1) G - W-B Purge VSV for EVAP system operation signal Ignition switch on (IG) 9 to 14 V
    B1-34 (PRG) - B3-1 (E1) G - W-B Purge VSV for EVAP system operation signal Idling Pulse generation (see waveform 8  h)
    B2-1 (HA2A) - B2-6 (E05) B - W-B Air fuel ratio sensor heater operation signal Idling Below 3.0 V
    B2-1 (HA2A) - B2-6 (E05) B - W-B Air fuel ratio sensor heater operation signal Ignition switch on (IG) 9 to 14 V
    B2-2 (HA1A) - B2-7 (E04) L - W-B Air fuel ratio sensor heater operation signal Idling Below 3.0 V
    B2-2 (HA1A) - B2-7 (E04) L - W-B Air fuel ratio sensor heater operation signal Ignition switch on (IG) 9 to 14 V
    B2-3 (ME01) - B3-1 (E1) W-B - W-B Earth (ground) circuit of ECM Always Below 1 V
    B2-4 (E03) - B3-1 (E1) W-B - W-B Earth (ground) circuit of ECM Always Below 1 V
    B2-5 (HT2B) - B3-1 (E1) R - W-B Heated oxygen sensor heater operation signal Idling Below 3.0 V
    B2-5 (HT2B) - B3-1 (E1) R - W-B Heated oxygen sensor heater operation signal Ignition switch on (IG) 9 to 14 V
    B2-6 (E05) - B3-1 (E1) W-B - W-B Earth (ground) circuit of ECM Always Below 1 V
    B2-7 (E04) - B3-1 (E1) W-B - W-B Earth (ground) circuit of ECM Always Below 1 V
    B2-21 (KNK2) - B2-20 (EKN2) R - G Knock sensor signal With engine speed at 4000 rpm after warming up Pulse generation (see waveform 4  d)
    B2-22 (A1A+) - B3-1 (E1) BR - W-B Air fuel ratio sensor signal Ignition switch on (IG) 3.3 V(1)
    B2-23 (A2A+) - B3-1 (E1) P - W-B Air fuel ratio sensor signal Ignition switch on (IG) 3.3 V(1)
    B2-29 (KNK1) - B2-28 (EKNK) B - W Knock sensor signal With engine speed at 4000 rpm after warming up Pulse generation (see waveform 4  d)
    B2-30 (A1A-) - B3-1 (E1) Y - W-B Air fuel ratio sensor Ignition switch on (IG) 3.0 V(1)
    B2-31 (A2A-) - B3-1 (E1) L - W-B Air fuel ratio sensor Ignition switch on (IG) 3.0 V(1)
    B2-33 (OX2B) - B1-28 (E2) B - BR Heated oxygen sensor signal With engine speed at 2500 rpm for 2 minutes after warming up Pulse generation (see waveform 2  b)
    (1) The ECM terminal voltage is constant regardless of the output voltage from the sensor.
    (2) w/ Smart Key System
    1. WAVEFORM 1
      1. Camshaft timing oil control valve operation signal
        WAVEFORM REFERENCE CHART

        ECM Terminal Names Between OC1+ and OC1-, OC2+ and OC2-, OE1+ and OE1-, or OE2+ and OE2-
        Tester Ranges 5 V/DIV, 1 msec./DIV
        Conditions Idling

        HINT:

        The wavelength becomes shorter as the engine rpm increases.

        Fig 2: Camshaft Timing Oil Control Valve Operation Signal Waveform
        G04996196Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. WAVEFORM 2
      1. Heated oxygen sensor signal
        WAVEFORM REFERENCE CHART

        ECM Terminal Names Between OX1B and E2, or OX2B and E2
        Tester Ranges 0.2 V/DIV, 200 msec./DIV
        Conditions With engine speed at 2500 rpm for 2 minutes after warming up

        HINT:

        In the DATA LIST, item O2S B1S2 shows the ECM input values from the heated oxygen sensor.

        Fig 3: Heated Oxygen Sensor Signal Waveform
        G04996197Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. WAVEFORM 3
      1. Fuel injector operation signal
        WAVEFORM REFERENCE CHART

        ECM Terminal Names Between #10 (to 60) and E01
        Tester Ranges 30 V/DIV, 20 msec./DIV
        Conditions Idling

        HINT:

        The wavelength becomes shorter as the engine rpm increases.

        Fig 4: Fuel Injector Operation Signal Waveform
        G04996198Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. WAVEFORM 4
      1. Knock sensor signal
        WAVEFORM REFERENCE CHART

        ECM Terminal Names Between KNK1 and EKNK, or KNK2 and EKN2
        Tester Ranges 0.01 to 10 V/DIV, 0.01 to 10 msec./DIV
        Conditions With engine speed at 4000 rpm after warming up

        HINT:

        • The wavelength becomes shorter as the engine rpm increases.
        • The waveforms and amplitudes displayed differ slightly depending on the vehicle.
          Fig 5: Knock Sensor Signal Waveform
          G04996199Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. WAVEFORM 5
      1. Variable Valve Timing (VVT) sensor signal (1)
      2. Crankshaft position sensor signal (2)
        WAVEFORM REFERENCE CHART

        ECM Terminal Names
        1. EV1+ and EV1-, or EV2+ and EV2-
        2. Between NE+ and NE-
        Tester Ranges 5 V/DIV, 20 ms./DIV
        Conditions Idling

        HINT:

        The wavelength becomes shorter as the engine rpm increases.

        Fig 6: Variable Valve Timing (VVT) And Crankshaft Position Sensor Signal Waveform
        G06111375Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. WAVEFORM 6
      1. Variable Valve Timing (VVT) sensor signal (1)
      2. Crankshaft position sensor signal (2)
        WAVEFORM REFERENCE CHART

        ECM Terminal Names
        1. Between VV1+ and VV1-, VV2+ and VV2-
        2. Between NE+ and NE-
        Tester Ranges 5 V/DIV, 20 ms./DIV
        Conditions Idling

        HINT:

        The wavelength becomes shorter as the engine rpm increases.

        Fig 7: Variable Valve Timing (VVT) And Crankshaft Position Sensor Signal Waveform
        G06111376Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. WAVEFORM 7
      1. Igniter IGT signal (from ECM to igniter) (1)
      2. Igniter IGF signal (from igniter to ECM) (2)
        WAVEFORM REFERENCE CHART

        ECM Terminal Names
        1. Between IGT (1 to 6) and E1
        2. Between IGF1 and E1
        Tester Ranges 2 V/DIV, 20 msec./DIV
        Conditions Idling

        HINT:

        The wavelength becomes shorter as the engine rpm increases.

        Fig 8: Igniter IGT (From ECM To Igniter) And IGF Signal (From Igniter To ECM) Waveform
        G04996201Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. WAVEFORM 8
      1. Purge VSV for EVAP system operation signal
        WAVEFORM REFERENCE CHART

        ECM Terminal Names Between PRG and E1
        Tester Ranges 10 V/DIV, 50 msec./DIV
        Conditions Idling

        HINT:

        If the waveform is not similar to that shown in the illustration, check the waveform again after idling for 10 minutes or more.

        Fig 9: Purge VSV For EVAP System Operation Signal Waveform
        G04996202Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    9. WAVEFORM 9
      1. Vehicle speed signal
        WAVEFORM REFERENCE CHART

        ECM Terminal Names Between SPD and E1
        Tester Ranges 2 V/DIV, 20 msec./DIV
        Conditions Driving at 12 mph (20 km/h)

        HINT:

        • The wavelength becomes shorter as the vehicle speed increases.
        • Depending on the vehicle, the output waveform voltage may rise to 12 V if influenced by optionally installed systems.
          Fig 10: Vehicle Speed Signal Waveform
          G04996203Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    10. WAVEFORM 10
      1. Throttle drive motor operation signal (positive terminal)
        WAVEFORM REFERENCE CHART

        ECM Terminal Names Between M+ and ME01
        Tester Ranges 5 V/DIV, 1 msec./DIV
        Conditions Idling with warm engine

        HINT:

        The duty ratio varies depending on the throttle actuator operation.

        Fig 11: Throttle Drive Motor Operation Signal (Positive Terminal) Waveform
        G04996204Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    11. WAVEFORM 11
      1. Throttle drive motor operation signal (negative terminal)
        WAVEFORM REFERENCE CHART

        ECM Terminal Names Between M- and ME01
        Tester Ranges 5 V/DIV, 1 msec./DIV
        Conditions Idling with warm engine

        HINT:

        The duty ratio varies depending on the throttle actuator operation.

        Fig 12: Throttle Drive Motor Operation Signal (Negative Terminal) Waveform
        G04996205Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    12. WAVEFORM 12
      1. Engine speed signal
        WAVEFORM REFERENCE CHART

        ECM Terminal Names Between TACH and E1
        Tester Ranges 5 V/DIV, 10 msec./DIV
        Conditions Idling

        HINT:

        The wavelength becomes shorter as the engine rpm increases.

        Fig 13: Engine Speed Signal Waveform
        G04996206Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    13. WAVEFORM 13
      1. CAN communication signal
        WAVEFORM REFERENCE CHART

        ECM Terminal Name Between CANH and E1
        Tester Range 1 V/DIV, 10 μs./DIV.
        Condition Engine stopped engine and ignition switch on (IG)

        HINT:

        The wavelength varies depending on the CAN communication signal.

        Fig 14: CAN Communication Signal Waveform
        G04828030Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    14. WAVEFORM 14
      1. CAN communication signal
        WAVEFORM REFERENCE CHART

        ECM Terminal Name Between CANL and E1
        Tester Range 1 V/DIV., μs./DIV.
        Condition Engine stopped and ignition switch on (IG)

        HINT:

        The wavelength varies depending on the CAN communication signal.

        Fig 15: CAN Communication Signal Waveform
        G04828031Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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