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Terminals Of ECM

WARNING: This page is about a different variant/trim than selected.
  1. SFI SYSTEM 
    Fig 1: Identifying ECM Connector Terminals
    G04973435Courtesy 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 "STD Voltages" column.

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

    VOLTAGE SPECIFICATION

    Symbols (Terminal No.) Wiring Colors Terminal Descriptions Conditions STD Voltages
    +B (A55-2) - E1 (C55-81) R - W-B Power source of ECM Ignition switch on (IG) 9 to 14 V
    +B2 (A55-1) - E1 (C55-81) R - W-B Power source of ECM Ignition switch on (IG) 9 to 14 V
    BATT (A55-20) - E1 (C55-81) Y - W-B Battery (for measuring the battery voltage and for the ECM memory) Always 9 to 14 V
    VPMP (A55-42) - E1 (C55-81) W - W-B Vent valve operation signal (built into pump module) Ignition switch on (IG) 9 to 14 V
    MPMP (A55-34) - E1 (C55-81) G - W-B Vacuum pump operation signal (built into pump module) Vacuum pump OFF 0 to 3V
    MPMP (A55-34) - E1 (C55-81) G - W-B Vacuum pump operation signal (built into pump module) Vacuum pump ON 9 to 14 V
    +BM (A55-3) - E1 (C55-81) LG - W-B Power source of ETCS throttle motor Always 9 to 14 V
    MREL (A55-44) - E1 (C55-81) O - W-B EFI relay operation signal Ignition switch on (IG) 9 to 14 V
    IGSW (A55-28) - E1 (C55-81) Y - W-B Ignition switch signal Ignition switch on (IG) 9 to 14 V
    FC (A55-7) - E1 (C55-81) Y - W-B C/OPEN relay operation signal (fuel pump control) Ignition switch on (IG), Engine stopped 9 to 14 V
    FC (A55-7) - E1 (C55-81) Y - W-B C/OPEN relay operation signal (fuel pump control) Ignition switch on (IG), Engine idling 0 to 1.5 V
    STP (A55-36) - E1 (C55-81) W - W-B Stop light switch signal W-Brake pedal depressed 7.5 to 14 V
    STP (A55-36) - E1 (C55-81) W - W-B Stop light switch signal W-Brake pedal released Below 1.5 V
    ST1- (A55-35) - E1 (C55-81) GR - W-B Stop light switch signal (opposite to STP terminal) Ignition switch on (IG), W-Brake pedal depressed Below 1.5 V
    ST1- (A55-35) - E1 (C55-81) GR - W-B Stop light switch signal (opposite to STP terminal) Ignition switch on (IG), W-Brake pedal released 7.5 to 14 V
    STAR(2) (C55-63) - E1 (C55-81) R - W-B Starter relay control Ignition switch on (IG) Below 1.5 V
    Cranking 6.0 V or more
    ACCR(2) (A24-13) - E1 (C55-81) B - W-B ACC relay control signal Cranking Below 1.5 V
    VPA (A55-55) - E1 (C55-81) G - W-B Accelerator pedal position sensor signal (for engine control) Ignition switch on (IG), Accelerator pedal fully released 0.5 to 1.1 V
    VPA (A55-55) - E1 (C55-81) G - W-B Accelerator pedal position sensor signal (for engine control) Ignition switch on (IG), Accelerator pedal fully depressed 2.6 to 4.5 V
    VPA2 (A55-56) - EPA2 (A55-60) R-O Accelerator pedal position sensor signal (for sensor malfunction detection) Ignition switch on (IG), Accelerator pedal fully released 1.2 to 2.0 V
    VPA2 (A55-56) - EPA2 (A55-60) R-O Accelerator pedal position sensor signal (for sensor malfunction detection) Ignition switch on (IG), Accelerator pedal fully depressed 3.4 to 5.0 V
    EPA (A55-59) - VPA (A55-55) Y-G Accelerator pedal position sensor signal (for engine control) Ignition switch on (IG), Accelerator pedal fully released 0.5 to 1.1 V
    EPA (A55-59) - VPA (A55-55) Y-G Accelerator pedal position sensor signal (for engine control) Ignition switch on (IG), Accelerator pedal fully depressed 2.6 to 4.5 V
    EPA2 (A55-60) - VPA2 (A55-56) O-R Accelerator pedal position sensor signal (for sensor malfunction detection) Ignition switch on (IG), Accelerator pedal fully released 1.2 to 2.0 V
    EPA2 (A55-60) - VPA2 (A55-56) O-R Accelerator pedal position sensor signal (for sensor malfunction detection) Ignition switch on (IG), Accelerator pedal fully depressed 3.4 to 5.0 V
    PPMP (C55-77) - E1 (C55-81) L - W-B Pressure sensor signal (built into pump module) Ignition switch on (IG) 3 to 3.6 V
    TC (A55-27) - E1 (C55-81) P - W-B Terminal TC of DLC3 Ignition switch on (IG) 9 to 14 V
    VCPA (A55-57) - EPA (A55-59) B-Y Power source of accelerator pedal position sensor (for VPA) Ignition switch on (IG) 4.5 to 5.0 V
    VCP2 (A55-58) - EPA2 (A55-60) L-0 Power source of accelerator pedal position sensor (for VPA2) Ignition switch on (IG) 4.5 to 5.0 V
    TACH (A55-15) - E1 (C55-81) B - W-B Engine speed signal (for combination meter) Idling Pulse generation (see  k, waveform 11)
    CCS (A55-40) - E1 (C55-81) W - W-B Cruise control main switch signal Ignition switch on (IG) 10 to 16 V
    CANCEL switch ON 6.6 to 10.1 V
    SET/COAST switch ON 4.5 to 7.1 V
    RES/ACC switch ON 2.3 to 4.0 V
    Main switch ON Below 1 V
    SPD (A55-8) - E1 (C55-81) V - W-B Vehicle speed signal from combination meter Ignition switch on (IG), driving wheel rotated slowly Pulse generation (see  h, waveform 8)
    W (A55-24) - E1 (C55-81) BR - W-B Malfunction Indicator Lamp (MIL) operation signal Ignition switch on (IG) Below 3.0 V
    W (A55-24) - E1 (C55-81) BR - W-B Malfunction Indicator Lamp (MIL) operation signal Idling 9 to 14 V
    CANH (A55-41) - CANL (A55-49) B-W CAN communication circuit Ignition switch off 54 to 69 Ω
    E1 (C55-81) - Body ground W-B-- Earth (ground) circuit of ECM Always Below 1 V
    #10 (C55-45) - E01 (C55-22) B - W-B Fuel injector operation signal Ignition switch on (IG) 9 to 14 V
    #20 (C55-85) - E01 (C55-22) R - W-B
    #30 (C55-44) - E01 (C55-22) Y - W-B
    #40 (C55-84) - E01 (C55-22) L - W-B
    #50 (C55-43) - E01 (C55-22) W-L - W-B
    #60 (C55-83) - E01 (C55-20) BR - W-B
    #10 (C55-45) - E01 (C55-22) B - W-B Fuel injector operation signal Idling Pulse generation (see  c, waveform 3)
    #20 (C55-85) - E01 (C55-22) R - W-B
    #30 (C55-44) - E01 (C55-22) Y - W-B
    #40 (C55-84) - E01 (C55-22) L - W-B
    #50 (C55-43) - E01 (C55-22) W-L - W-B
    #60 (C55-83) - E01 (C55-20) BR - W-B
    PSW (C55-70) - E1 (C55-81) B - W-B P/S pressure switch signal Ignition switch on (IG) 9 to 14 V
    STA (A55-48) - E1 (C55-81) V - W-B Starter relay operation signal Cranking 9 to 14 V
    STSW(2) (A55-14) - E1 (C55-81) R - W-B Starter relay operation signal Cranking 9 to 14 V
    OC2- (C55-51) - OC2+ (C55-52) R-BR Camshaft timing Oil Control Valve (OCV) operation signal (Intake side) Ignition switch on (IG) Pulse generation (see  a, waveform 1)
    OC2+ (C55-52) - OC2- (C55-51) BR-R Camshaft timing Oil Control Valve (OCV) operation signal (Intake side) Ignition switch on (IG) Pulse generation (see  a, waveform 1)
    OC1- (C55-57) - OC1+ (C55-58) B-W Camshaft timing Oil Control Valve (OCV) operation signal (Intake side) Ignition switch on (IG) Pulse generation (see  a, waveform 1)
    OC1+ (C55-58) - OC1- (C55-57) W-B Camshaft timing Oil Control Valve (OCV) operation signal (Intake side) Ignition switch on (IG) Pulse generation (see  a, waveform 1)
    VV2+ (C55-67) - VV2- (C55-90) W-B Variable Valve Timing (VVT) sensor signal (Intake side) Idling Pulse generation (see  e, waveform 5)
    VV1+ (C55-69) - VV1- (C55-92) L-LG Variable Valve Timing (VVT) sensor signal (Intake side) Idling Pulse generation (see  e, waveform 5)
    NE- (C55-111) - NE+ (C55-110) R-G Crankshaft position sensor signal Idling Pulse generation (see  e, waveform 5)
    NE+ (C55-110) - NE- (C55-111) G-R Crankshaft position sensor signal Idling Pulse generation (see  e, waveform 5)
    EV2- (C55-89) - EV2+ (C55-66) L-G-R Variable Valve Tinning (VVT) sensor signal (Exhaust side) Idling Pulse generation (see  e, waveform 5)
    EV2+ (C55-66) - EV2- (C55-89) G-R-L Variable Valve Timing (VVT) sensor signal (Exhaust side) Idling Pulse generation (see  e, waveform 5)
    EV1- (C55-91) - EV1+ (C55-68) B-Y Variable Valve Timing (VVT) sensor signal (Exhaust side) Idling Pulse generation (see  e, waveform 5)
    EV1+ (C55-68) - EV1- (C55-91) Y-B Variable Valve Timing (VVT) sensor signal (Exhaust side) Idling Pulse generation (see  e, waveform 5)
    OE1+ (C55-16) - OE1- (C55-17) L-LG Camshaft timing Oil Control Valve (OCV) operation signal (Exhaust side) Ignition switch on (IG) Pulse generation (see  a, waveform 1)
    OE2+ (C55-14) - OE2- (C55-15) W-L-Y Camshaft timing Oil Control Valve (OCV) operation signal (Exhaust side) Ignition switch on (IG) Pulse generation (see  a, waveform 1)
    VV2- (C55-90) - VV2+ (C55-67) B-W Variable Valve Tinning (VVT) sensor signal (Intake side) Idling Pulse generation (see  e, waveform 5)
    VV1- (C55-92) - VV1+ (C55-69) LG-L Variable Valve Timing (VVT) sensor signal (Intake side) Idling Pulse generation (see  e, waveform 5)
    OE1- (G55-17) - OE1+ (C55-16) LG-L Camshaft timing Oil Control Valve (OCV) operation signal (Exhaust side) Ignition switch on (IG) Pulse generation (see  a, waveform 1)
    OE2- (C55-15) - OE2+ (C55-14) Y-W-L Camshaft timing Oil Control Valve (OCV) operation signal (Exhaust side) Ignition switch on (IG) Pulse generation (see  a, waveform 1)
    HT1B (C55-48) - E1 (C55-81) LG - W-B Heated oxygen sensor heater operation signal Idling Below 3.0 V
    HT2B (C55-47) - E1 (C55-81) Y - W-B
    HT1B (C55-48) - E1 (C55-81) LG - W-B Heated oxygen sensor heater operation signal Ignition switch on (IG) 9 to 14 V
    HT2B (C55-47) - E1 (C55-81) Y - W-B
    ACM (C55-42) - E1 (C55-81) L-B - W-B VSV for active control mount system operation signal Ignition switch on (IG) 9 to 14 V
    M- (C55-18) - ME01 (C55-20) R-B Throttle drive motor operation signal (negative terminal) Idling with warm engine Pulse generation (see  j, waveform 10)
    M+ (C55-19) - ME01 (C55-20) G-B Throttle drive motor operation signal (positive terminal) Idling with warm engine Pulse generation (see  i, waveform 9)
    E02 (C55-21) - Body ground B-W-- Earth (ground) circuit of ECM Always Below 1 V
    E01 (C55-22) - Body ground W-B-- Earth (ground) circuit of ECM Always Below 1 V
    IGT1 (C55-40) - E1 (C55-81) W - W-B Ignition coil with igniter (ignition signal) Idling Pulse generation (see  f, waveform 6)
    IGT2 (C55-39) - E1 (C55-81) G-R - W-B
    IGT3 (C55-38) - E1 (C55-81) G - W-B
    IGT4 (C55-37) - E1 (C55-81) LG - W-B
    IGT5 (C55-36) - E1 (C55-81) P - W-B
    IGT6 (C55-35) - E1 (C55-81) L-B - W-B
    GE01 (C55-41) - E1 (C55-81) G-R - W-B Shielded earth (ground) circuit of throttle drive motor Always Below 1 V
    OX1B (C55-88) - EX1B (C55-65) W-BR Heated oxygen sensor signal With engine speed at 2,500 rpm for 2 minutes after warming up Pulse generation (see  b, waveform 2)
    OX2B (C55-87) - EX2B (C55-64) B - W-B
    VTA2 (C55-99) - ETA (C55-97) W-L-P Throttle position sensor signal (for sensor malfunction detection) Ignition switch on (IG), Accelerator pedal fully released 2.1 to 3.1 V
    VTA2 (C55-99) - ETA (C55-97) W-L-P Throttle position sensor signal (for sensor malfunction detection) Ignition switch on (IG), Accelerator pedal fully depressed 4.5 to 5.0 V
    VTA1 (C55-98) - ETA (C55-97) Y-P Throttle position sensor signal (for engine control) Ignition switch on (IG), Throttle valve fully closed 0.5 to 1.2 V
    VTA1 (C55-98) - ETA (C55-97) Y-P Throttle position sensor signal (for engine control) Ignition switch on (IG), Throttle valve fully open 3.2 to 4.8 V
    THW (C55-79) - ETHW (C55-78) B-P Engine coolant temperature sensor signal Idling, Engine coolant temperature 80°C (176°F) 0.2 to 1.0 V
    THA (C55-71) - ETHA (C55-74) P-G-R Intake air temperature sensor signal Idling, Intake air temperature 20°C (68°F) 0.5 to 3.4 V
    IGF1 (C55-106) - E1 (C55-81) BR - W-B Ignition coil with igniter (ignition confirmation signal) Ignition switch on (IG) 4.5 to 5.0 V
    IGF1 (C55-106) - E1 (C55-81) BR - W-B Ignition coil with igniter (ignition confirmation signal) Idling Pulse generation (see  f, waveform 6)
    AICV(A55-4) - E1(C55-81) V - W-B VSV for Air intake control system operation signal Ignition switch on (IG) 9 to 14 V
    E2G (C55-73) - E1 (C55-81) LG - W-B Earth (ground) circuit of sensor for mass air flow meter Always Below 1 V
    VG (C55-72) - E2G (C55-73) L-B - LG Mass Air Flow (MAF) meter signal Idling, Shift lever position P or N, A/C switch OFF 0.5 to 3.0 V
    ACIS (C55-107) - E1 (C55-81) B-W - W-B VSV for ACIS (Acoustic Control Induction System) operation signal Ignition switch on (IG) 9 to 14 V
    PRG (C55-108) - E1 (C55-81) G-R - W-B Purge VSV for EVAP system operation signal Ignition switch on (IG) 9 to 14 V
    PRG(C55-108) - E1(C55-81) G-R - W-B Purge VSV for EVAP system operation signal Idling Pulse generation (see  g, waveform 7)
    HA2A (C55-109) - E05 (C55-46) B-W-W A/F sensor heater operation signal Idling Below 3.0 V
    HA2A (C55-109) - E05 (C55-46) B-W-W A/F sensor heater operation signal Ignition switch on (IG) 9 to 14 V
    HA1A (C55-86) - E04 (C55-23) G-W A/F sensor heater operation signal Idling Below 3.0 V
    HA1A (C55-86) - E04 (C55-23) G-W A/F sensor heater operation signal Ignition switch on (IG) 9 to 14 V
    ME01 (C55-20) - E1 (C55-81) B - W-B Earth (ground) circuit of ECM Always Below 1 V
    E03 (C55-104) - E1 (C55-81) B - W-B Earth (ground) circuit of ECM Always Below 1 V
    HT2B (C55-47) - E1 (C55-81) Y - W-B Heated oxygen sensor heater operation signal Idling Below 3.0 V
    HT1B (C55-48) - E1 (C55-81) LG - W-B
    HT2B (C55-47) - E1 (C55-81) Y - W-B Heated oxygen sensor heater operation signal Ignition switch on (IG) 9 to 14 V
    HT1B (C55-48) - E1 (C55-81) LG - W-B
    E05 (C55-48) - E1(C55-81) W - W-B Earth (ground) circuit of ECM Always Below 1 V
    E04 (C55-23) - E1(C55-81) W - W-B Earth (ground) circuit of ECM Always Below 1 V
    NSW (C55-62) - E1 (C55-81) L-B - W-B Park/Neutral position switch signal Ignition switch on (IG), Shift lever position P or N Below 3.0 V
    NSW (C55-62) - E1 (C55-81) L-B - W-B Park/Neutral position switch signal Ignition switch on (IG), Shift lever position other than P or N 9 to 14 V
    EKN2 (C55-117) - KNK2 (C55-118) W-B Earth (ground) circuit of knock sensor With engine speed at 4,000 rpm after warming up Pulse generation (see  d, waveform 4)
    KNK2 (C55-118) - EKN2 (C55-117) B-W Knock sensor signal With engine speed at 4,000 rpm after warming up Pulse generation (see  d, waveform 4)
    A1A+ (C55-93) - E1 (C55-81) L - W-B A/F sensor signal Ignition switch on (IG) 3.3 V(1)
    A1A+ (C55-93) - E1 (C55-81) L - W-B A/F sensor signal Ignition switch on (IG) 3.0 V(1)
    A2A+ (C55-120) - E1 (C55-81) BR - W-B A/F sensor signal Ignition switch on (IG) 3.3 V(1)
    A2A+ (C55-120) - E1 (C55-81) BR - W-B A/F sensor signal Ignition switch on (IG) 3.0 V(1)
    EKNK (C55-94) - KNK1 (C55-95) G-R Earth (ground) circuit of knock sensor With engine speed at 4,000 rpm after warming up Pulse generation (see  d, waveform 4)
    KNK1 (C55-95) - EKNK (C55-94) R-G Knock sensor signal With engine speed at 4,000 rpm after warming up Pulse generation (see  d, waveform 4)
    A1A- (C55-116) - E1 (C55-81) P - W-B A/F sensor Ignition switch on (IG) 3.3 V(1)
    A1A- (C55-116) - E1 (C55-81) P - W-B A/F sensor Ignition switch on (IG) 3.0 V(1)
    A2A- (C55-119) - E1 (C55-81) Y - W-B A/F sensor Ignition switch on (IG) 3.3 V(1)
    A2A- (C55-119) - E1 (C55-81) Y - W-B A/F sensor Ignition switch on (IG) 3.0 V(1)
    OX2B (C55-87) - EX2B (C55-64) B - W-B Heated oxygen sensor signal With engine speed at 2,500 rpm for 2 minutes after warming up Pulse generation (see  b, waveform 2)
    OX1B (C55-88) - EX1B (C55-65) W-BR
    (1) The ECM terminal voltage is constant regardless of the output voltage from the sensor.
    (2) With Smart Key system
    1. WAVEFORM 1
      1. Camshaft timing Oil Control Valve (OCV) operation signal
        WAVEFORM 1 REFERENCE

        ECM Terminal Names Between OC1+ and OC1-, OC2+ and OC2-, OE1 + and OE1-, or OE2+ and OE2-
        Tester Ranges 5 V/DIV, 1 ms./DIV
        Conditions Idling
        Fig 2: Identifying Waveform 1
        G04973436Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT:

        The wavelength becomes shorter as the engine rpm increases.

    2. WAVEFORM 2
      1. Heated oxygen sensor signal
        WAVEFORM 2 REFERENCE

        ECM Terminal Names Between OX1B and EX1B, or OX2B and EX2B
        Tester Ranges 0.2 V/DIV, 200 ms./DIV
        Conditions Engine speed is maintained at 2,500 rpm for 2 minutes after sensor is warmed up
        Fig 3: Identifying Waveform 2
        G04973437Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT:

        In the Data List, item O2S B1S2 shows the ECM input values from the heated oxygen sensor.

    3. WAVEFORM 3
      1. Fuel injector operation signal
        WAVEFORM 3 REFERENCE

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

        HINT:

        The wavelength becomes shorter as the engine rpm increases.

        Fig 4: Identifying Waveform 3
        G04973438Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. WAVEFORM 4
      1. Knock sensor signal
        WAVEFORM 4 REFERENCE

        ECM Terminal Names Between KNK1 and EKNK, or KNK2 and EKN2
        Tester Ranges 0.01 to 10 V/DIV, 0.01 to 10 ms./DIV
        Conditions Engine speed is maintained at 4,000 rpm after engine is warmed up

        HINT:

        • The wavelength becomes shorter as the engine rpm increases.
        • The waveforms and amplitudes displayed differ slightly depending on the vehicle.
          Fig 5: Identifying Waveform 4
          G04973439Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. WAVEFORM 5
      1. Variable Valve Timing (VVT) sensor signal (1)
      2. Crankshaft position sensor signal (2)
        WAVEFORM 5 REFERENCE

        ECM Terminal Names
        1. Between VV1+ and VV1-, VV2+ and VV2-, 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: Identifying Waveform 5
        G04973440Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. WAVEFORM 6
      1. Igniter IGT signal (from ECM to igniter) (1)
      2. Igniter IGF signal (from igniter to ECM) (2)
        WAVEFORM 6 REFERENCE

        ECM Terminal Names
        1. Between IGT (1 to 6) and E1
        2. Between IGF1 and E1
        Tester Ranges 2 V/DIV, 20 ms./DIV
        Conditions Idling
        Fig 7: Identifying Waveform 6
        G04973441Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT:

        The wavelength becomes shorter as the engine rpm increases.

    7. WAVEFORM 7
      1. Purge VSV for EVAP system operation signal
        WAVEFORM 7 REFERENCE

        ECM Terminal Names Between PRG and E1
        Tester Ranges 10 V/DIV, 50 ms./DIV
        Conditions Idling
        Fig 8: Identifying Waveform 7
        G04973442Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT:

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

    8. WAVEFORM 8
      1. Vehicle speed signal
        WAVEFORM 8 REFERENCE

        ECM Terminal Names Between SPD and E1
        Tester Ranges 2 V/DIV, 20 ms./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 9: Identifying Waveform 8
          G04973443Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    9. WAVEFORM 9
      1. Throttle drive motor operation signal (positive terminal)
        WAVEFORM 9 REFERENCE

        ECM Terminal Names Between M+ and ME01
        Tester Ranges 5 V/DIV, 1 ms./DIV
        Conditions Idling with warm engine
        Fig 10: Identifying Waveform 9
        G04973444Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT:

        The duty ratio varies depending on the throttle actuator operation.

    10. WAVEFORM 10
      1. Throttle drive motor operation signal (negative terminal)
        WAVEFORM 10 REFERENCE

        ECM Terminal Names Between M- and ME01
        Tester Ranges 5 V/DIV, 1 ms./DIV
        Conditions Idling with warm engine
        Fig 11: Identifying Waveform 10
        G04973445Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT:

        The duty ratio varies depending on the throttle actuator operation.

    11. WAVEFORM 11
      1. Engine speed signal
        WAVEFORM 11 REFERENCE

        ECM Terminal Names Between TACH and E1
        Tester Ranges 5 V/DIV, 10ms./DIV
        Conditions Idling
        Fig 12: Identifying Waveform 11
        G04973446Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT:

        The wavelength becomes shorter as the engine rpm increases.

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