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Terminals Of ECM

  1. SFI SYSTEM 
    Fig 1: Identifying Terminals Of ECM Connector
    G06023505Courtesy 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 result of checks should be compared with the standard normal voltage for that pair of terminals, displayed in the Specified Condition column.

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

    ECM TERMINALS REFERENCE

    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    A41-3 (+B) - B39-81 (E1) R - W Power source of ECM Ignition switch ON 11 to 14 V
    A41-2 (+B2) - B39-81 (E1) GR - W Power source of ECM Ignition switch ON 11 to 14 V
    A41-1 (BATT) - B39-81 (E1) V - W Battery (for measuring the battery voltage and for the ECM memory) Always 11 to 14 V
    B39-41 (+BM) - B39-81 (E1) BR - W Power source of electronic throttle control system throttle motor Always 11 to 14 V
    A41-34 (MREL) - B39-81 (E1) Y - W EFI MAIN relay operation signal Ignition switch ON 11 to 14 V
    B39-80 (VCTA) - B39-79 (ETA) Y-B - W-B Power source for throttle position sensor (specific voltage) Idling with warm engine 4.5 to 5.5 V
    B39-67 (VCV1) - B39-81 (E1) P - W Power source for VVT sensor (specific voltage) Idling with warm engine 4.5 to 5.5 V
    B39-66 (VCV2) - B39-81 (E1) R - W Power source for VVT sensor (specific voltage) Idling with warm engine 4.5 to 5.5 V
    A41-28 (IGSW) - B39-81 (E1) SB - W Ignition switch signal Ignition switch ON 11 to 14 V
    A41-52 (FC) - B39-81 (E1) LG - W C/OPN relay operation signal (fuel pump control) Ignition switch ON 11 to 14 V
    A41-52 (FC) - B39-81 (E1) LG - W C/OPN relay operation signal (fuel pump control) Idling with warm engine 0 to 1.5 V
    A41-36 (STP) - B39-81 (E1) G - W Stop light switch assembly signal Brake pedal depressed 7.5 to 14 V
    A41-36 (STP) - B39-81 (E1) G - W Stop light switch assembly signal Brake pedal released 0 to 1.5 V
    A41-35 (ST1-) - B39-81 (E1) V - W Stop light switch assembly signal (opposite to STP terminal) Ignition switch ON, brake pedal depressed 0 to 1.5 V
    A41-35 (ST1-) - B39-81 (E1) V - W Stop light switch assembly signal (opposite to STP terminal) Ignition switch ON, brake pedal released 7.5 to 14 V
    A41-55 (VPA) - A41-58 (EPA) L - GR Accelerator pedal position sensor signal (for engine control) Ignition switch ON, accelerator pedal fully released 0.5 to 1.1 V
    A41-55 (VPA) - A41-58 (EPA) L - GR Accelerator pedal position sensor signal (for engine control) Ignition switch ON, accelerator pedal fully depressed 2.6 to 4.5 V
    A41-56 (VPA2) - A41-60 (EPA2) BE - LG Accelerator pedal position sensor signal (for sensor malfunction detection) Ignition switch ON, accelerator pedal fully released 1.2 to 2.0 V
    A41-56 (VPA2) - A41-60 (EPA2) BE - LG Accelerator pedal position sensor signal (for sensor malfunction detection) Ignition switch ON, accelerator pedal fully depressed 3.4 to 4.8 V
    A41-30 (VPMP) - B39-81 (E1) BE - W Vent valve (built into canister pump module) Ignition switch ON 11 to 14 V
    A41-49 (MPMP) - B39-81 (E1) V - W Leak detection pump (built into canister pump module) Leak detection pump off 0 to 3.0 V
    Leak detection pump on 11 to 14 V
    B39-121 (PPMP) - B39-81 (E1) Y - W Canister pressure sensor (built into canister pump module) Ignition switch ON 3.0 to 3.6 V
    A41-16 (TC) - B39-81 (E1) V - W Terminal TC of DLC3 Ignition switch ON 11 to 14 V
    A41-57 (VCPA) - A41-58 (EPA) G - GR Power source of accelerator pedal position sensor (for VPA) Ignition switch ON 4.5 to 5.5 V
    A41-59 (VCP2) - A41-60 (EPA2) Y - LG Power source of accelerator pedal position sensor (for VPA2) Ignition switch ON 4.5 to 5.5 V
    A41-15 (TACH) - B39-81 (E1) Y - W Engine speed signal (for combination meter assembly) Idling with warm engine Pulse generation (see waveform 12 l)
    A41-13 (SPD) - B39-81 (E1) BR - W Vehicle speed signal from combination meter assembly Driving at 12 mph (20 km/h) Pulse generation (see waveform 9 i)
    A41-24 (W) - B39-81 (E1) R - W Malfunction Indicator Lamp (MIL) operation signal Ignition switch ON Below 3.0 V
    A41-24 (W) - B39-81 (E1) R - W Malfunction Indicator Lamp (MIL) operation signal Idling with warm engine 11 to 14 V
    A41-10 (CANH) - B39-81 (E1) Y - W CAN communication line Engine stopped and ignition switch ON Pulse generation (see waveform 13 m)
    A41-11 (CANL) - B39-81 (E1) W - W CAN communication line Engine stopped and ignition switch ON Pulse generation (see waveform 14 n)
    B39-81 (E1) - Body ground W - - Earth (ground) circuit of ECM Always Below 1 Ω
    B39-86 (#10) - B39-43 (E01) L - W-B Fuel injector assembly operation signal Ignition switch ON 11 to 14 V
    B39-109 (#20) - B39-43 (E01) Y - W-B
    B39-85 (#30) - B39-43 (E01) R - W-B
    B39-108 (#40) - B39-43 (E01) L-R - W-B
    B39-84 (#50) - B39-43 (E01) B-R - W-B
    B39-107 (#60) - B39-43 (E01) G - W-B
    B39-86 (#10) - B39-43 (E01) L - W-B Fuel injector assembly operation signal Idling with warm engine Pulse generation (see waveform 3 c)
    B39-109 (#20) - B39-43 (E01) Y - W-B
    B39-85 (#30) - B39-43 (E01) R - W-B
    B39-108 (#40) - B39-43 (E01) L-R - W-B
    B39-84 (#50) - B39-43 (E01) B-R - W-B
    B39-107 (#60) - B39-43 (E01) G - W-B
    B39-52 (OC2+) - B39-51 (OC2-) L-R - G-B Camshaft timing oil control valve assembly operation signal (Intake side) Idling Pulse generation (see waveform 1 a)
    B39-58 (OC1+) - B39-57 (OC1-) G-W - G-R Camshaft timing oil control valve assembly operation signal (Intake side) Idling Pulse generation (see waveform 1 a)
    B39-87 (VV2+) - B39-88 (VV2-) P - Y VVT sensor signal (Intake side) Idling with warm engine Pulse generation (see waveform 6 f)
    B39-90 (VV1+) - B39-89 (VV1-) L - LG VVT sensor signal (Intake side) Idling with warm engine Pulse generation (see waveform 6 f)
    B39-111 (NE-) - B39-110 (NE+) G - R Crankshaft position sensor signal Idling with warm engine Pulse generation (see waveform 5 e, 6 f)
    B39-110 (NE+) - B39-111 (NE-) R - G Crankshaft position sensor signal Idling with warm engine Pulse generation (see waveform 5 e, 6 f)
    A41-7 (NEO)(2) - B39-81 (E1) GR - W Crankshaft position sensor signal Idling with warm engine Pulse generation (see waveform 16 p)
    B39-64 (EV2+) - B39-89 (VV1-) GR - LG VVT sensor signal (Exhaust side) Idling with warm engine Pulse generation (see waveform 5 e)
    B39-69 (EV1+) - B39-89 (VV1-) Y - LG VVT sensor signal (Exhaust side) Idling with warm engine Pulse generation (see waveform 5 e)
    B39-56 (OE1+) - B39-55 (OE1-) G - LG Camshaft timing oil control valve assembly operation signal (Exhaust side) Idling Pulse generation (see waveform 1 a)
    B39-50 (OE2+) - B39-49 (OE2-) G - R-G Camshaft timing oil control valve assembly operation signal (Exhaust side) Idling Pulse generation (see waveform 1 a)
    B39-18 (M-) - B39-82 (ME01) L - W-B Throttle actuator operation signal (negative terminal) Idling with warm engine Pulse generation (see waveform 11 k)
    B39-19 (M+) - B39-82 (ME01) Y - W-B Throttle actuator operation signal (positive terminal) Idling with warm engine Pulse generation (see waveform 10 j)
    B39-42 (E02) - Body ground W - - Earth (ground) circuit of ECM Always Below 1 Ω
    B39-43 (E01) - Body ground W-B - - Earth (ground) circuit of ECM Always Below 1 Ω
    B39-40 (IGT1) - B39-81 (E1) R-L - W Ignition coil assembly (ignition signal) Idling with warm engine Pulse generation (see waveform 7 g)
    B39-39 (IGT2) - B39-81 (E1) P - W
    B39-38 (IGT3) - B39-81 (E1) Y-B - W
    B39-37 (IGT4) - B39-81 (E1) L-Y - W
    B39-36 (IGT5) - B39-81 (E1) G-Y - W
    B39-35 (IGT6) - B39-81 (E1) L-R - W
    B39-17 (GE01) - B39-81 (E1) R - W Shielded earth (ground) circuit of throttle actuator Always Below 1 V
    B39-114 (OX1B) - B39-115 (EX1B) B - GR Heated oxygen sensor signal Engine speed is maintained at 2500 rpm for 2 minutes after warning up engine Pulse generation (see waveform 2 b)
    B39-112 (OX2B) - B39-113 (EX2B) W - GR
    B39-77 (VTA2) - B39-79 (ETA) B-R - W-B Throttle position sensor signal (for sensor malfunction detection) ignition switch ON, accelerator pedal fully released 2.1 to 3.1 V
    B39-77 (VTA2) - B39-79 (ETA) B-R - W-B Throttle position sensor signal (for sensor malfunction detection) Ignition switch ON, accelerator pedal fully depressed 4.6 to 5.0 V
    B39-78 (VTA1) - B39-79 (ETA) R-W - W-B Throttle position sensor signal (for engine control) Ignition switch ON, throttle valve fully closed 0.5 to 1.1 V
    B39-78 (VTA1) - B39-79 (ETA) R-W - W-B Throttle position sensor signal (for engine control) Ignition switch ON, throttle valve fully open 3.2 to 4.8 V
    B39-76 (THW) - B39-97 (ETHW) G-B - W-B Engine coolant temperature sensor signal Idling, engine coolant temperature 60 to 120°C (140 to 248°F) 0.2 to 1.0 V
    B39-73 (THA) - B39-98 (ETHA) L - B-W Intake air temperature sensor signal Idling, intake air temperature 0 to 80°C (32 to 176°F) 0.5 to 3.4 V
    B39-104 (IGF1) - B39-81 (E1) W-R - W Ignition coil assembly (ignition confirmation signal) Ignition switch ON 4.5 to 5.0 V
    B39-104 (IGF1) - B39-81 (E1) W-R - W Ignition coil assembly (ignition confirmation signal) Idling with warm engine Pulse generation (see waveform 7 g)
    B39-61 (AICV) - B39-81 (E1) V - W Vacuum switching valve for air intake control system operation signal Ignition switch ON 11 to 14 V
    B39-75 (E2G) - B39-81 (E1) L-W - W Earth (ground) circuit of sensor for mass air flow meter sub-assembly Always Below 1 V
    B39-74 (VG) - B39-75 (E2G) R-L - W Mass air flow meter sub-assembly signal Idling, shift lever in P or N, A/C switch off 0 to 3.0 V
    B39-62 (ACIS) - B39-81 (E1) R-Y - W Intake air control valve assembly for acoustic control induction system operation signal Ignition switch ON 11 to 14 V
    B39-63 (PRG) - B39-81 (E1) G - W Purge VSV for EVAP system operation signal Ignition switch ON 11 to 14 V
    B39-63 (PRG) - B39-81 (E1) G - W Purge VSV for EVAP system operation signal Idling with warm engine Pulse generation (see waveform 8 h)
    B39-20 (HA2A) - B39-21 (E05) R-W - B Air fuel ratio sensor heater operation signal Idling Pulse generation (see waveform 15 o)
    B39-22 (HA1A) - B39-23 (E04) W - W-B Air fuel ratio sensor heater operation signal Idling Pulse generation (see waveform 15 o)
    B39-82 (ME01) - B39-81 (E1) W-B - W Earth (ground) circuit of ECM Always Below 1 V
    B39-46 (E03) - B39-81 (E1) W - W Earth (ground) circuit of ECM Always Below 1 V
    B39-44 (HT2B) - B39-46 (E03) W-L - W Heated oxygen sensor heater operation signal Idling Pulse generation (see waveform 15 o)
    B39-45 (HT1B) - B39-46 (E03) R-Y - W
    B39-83 (ACM) - B39-81 (E1) Y-G - W Duty vacuum switching valve for active control mount system operation signal Ignition switch ON 11 to 14 V
    B39-21 (E05) - B39-81 (E1) B - W Earth (ground) circuit of ECM Always Below 1 V
    B39-23 (E04) - B39-81 (E1) W-B - W Earth (ground) circuit of ECM Always Below 1 V
    B39-120 (NSW) - B39-81 (E1) G - W Park/Neutral position switch assembly signal Ignition switch ON, shift lever in P or N Below 3.0 V
    B39-120 (NSW) - B39-81 (E1) G - W Park/Neutral position switch assembly signal Ignition switch ON, shift lever in any position other than P or N 11 to 14 V
    B39-117 (KNK2) - B39-116 (EKN2) P - G Knock control sensor signal Engine speed is maintained at 4000 rpm after warming up engine Pulse generation (see waveform 4 d)
    B39-94 (KNK1) - B39-93 (EKNK) B - W Knock control sensor signal Engine speed is maintained at 4000 rpm after warming up engine Pulse generation (see waveform 4 d)
    B39-126 (A1A+) - B39-81 (E1) BR - W Air fuel ratio sensor Ignition switch ON 3.3 V(1)
    B39-125 (A1A-) - B39-81 (E1) Y - W Air fuel ratio sensor Ignition switch ON 3.0 V(1)
    B39-103 (A2A+) - B39-81 (E1) P - W Air fuel ratio sensor Ignition switch ON 3.3 V(1)
    B39-102 (A2A-) - B39-81 (E1) L - W Air fuel ratio sensor Ignition switch ON 3.0 V(1)
    B39-2 (P) - B39-81 (E1) Y - W P shift position switch signal Ignition switch ON and shift lever in P 11 to 14 V
    Ignition switch ON and shift lever in any position other than P 0 to 1.5 V
    B39-26 (R) - B39-81 (E1) G - W R shift position switch signal Ignition switch ON and shift lever in R 11 to 14 V
    Ignition switch ON and shift lever in any position other than R 0 to 1.5 V
    B39-25 (N) - B39-81 (E1) L-B - W N shift position switch signal Ignition switch ON and shift lever in N 11 to 14 V
    Ignition switch ON and shift lever in any position other than N 0 to 1.5 V
    B39-27 (D) - B39-81 (E1) BR - W D shift position switch signal Ignition switch ON and shift lever in D 11 to 14 V
    Ignition switch ON and shift lever in any position other than D 0 to 1.5 V
    A41-25 (S) - B39-81 (E1) BE - W S shift position switch signal Ignition switch ON and shift lever in S 11 to 14 V
    Ignition switch ON and shift lever in any position other than S 0 to 1.5 V
    A41-27 (SFTD) - B39-81 (E1) LG - W Down shift switch signal Ignition switch ON and shift lever in S 11 to 14 V
    Ignition switch ON and shift lever in S, the "-" range (down shift) selected 0 to 1.5 V
    A41-38 (SFTU) - B39-81 (E1) R - W Up shift switch signal Ignition switch ON and shift lever in S 11 to 14 V
    Ignition switch ON and shift lever in S, the "+" range (up shift) selected 0 to 1.5 V
    A41-48 (FPR) - B39-81 (E1) L - W Fuel pump control Cranking 11 to 14 V
    A41-48 (FPR) - B39-81 (E1) L - W Fuel pump control Idling 11 to 14 V
    B39-24 (CAN+) - B39-81 (E1) R - W CAN communication line Engine stopped and ignition switch ON Pulse generation (see waveform 13 m)
    B39-1 (CAN-) - B39-81 (E1) W - W CAN communication line Engine stopped and ignition switch ON Pulse generation (see waveform 14 n)
    A41-8 (CANP)(2) - B39-81 (E1) G - W CAN communication line Engine stopped and ignition switch ON Pulse generation (see waveform 13 m)
    A41-9 (CANN)(2) - B39-81 (E1) W - W CAN communication line Engine stopped and ignition switch ON Pulse generation (see waveform 14 n)
    A41-46 (STA) - B39-81 (E1) BR - W Starter signal Cranking 11 to 14 V
    A41-33 (ELS2) - Body ground BR - - Idle up signal Ignition switch ON, and appliance using 50 W or more 4.0 V or more
    (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 assembly operation signal
        WAVEFORM 1 REFERENCE

        ECM Terminal Name Between OC1+ and OC1-, OC2+ and OC2-, OE1 + and OE1-, or OE2+ and OE2-
        Tester Range 5 V/DIV, 1 ms./DIV
        Condition Idling

        HINT:

        The wavelength becomes shorter as the engine speed increases.

        Fig 2: Identifying Waveform 1
        G06023506Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. WAVEFORM 2
      1. Heated oxygen sensor signal
        WAVEFORM 2 REFERENCE

        ECM Terminal Name Between OX1B and EX1B, or OX2B and EX2B
        Tester Range 0.2 V/DIV., 200 ms./DIV.
        Condition Engine speed is maintained at 2500 rpm for 2 minutes after warming up engine

        HINT:

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

        Fig 3: Identifying Waveform 2
        G06023507Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. WAVEFORM 3
      1. Fuel injector assembly operation signal
        WAVEFORM 3 REFERENCE

        ECM Terminal Name Between #10 (to #60) and E01
        Tester Range 30 V/DIV., 20 ms./DIV.
        Condition Idling with warm engine

        HINT:

        The wavelength becomes shorter as the engine rpm increases.

        Fig 4: Identifying Waveform 3
        G06023508Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. WAVEFORM 4
      1. Knock control sensor signal
        WAVEFORM 4 REFERENCE

        ECM Terminal Name Between KNK1 and EKNK, or KNK2 and EKN2
        Tester Range 1 V/DIV., 1 ms./DIV.
        Condition Engine speed is maintained at 4000 rpm after warming up engine

        HINT:

        • The wavelength becomes shorter as the engine speed increases.
        • The waveforms and amplitudes displayed differ slightly depending on the vehicle.
          Fig 5: Identifying Waveform 4
          G06023509Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. WAVEFORM 5
      1. Variable Valve Timing (VVT) sensor for exhaust side signal (A)
      2. Crankshaft position sensor signal (B)
        WAVEFORM 5 REFERENCE

        ECM Terminal Name
        1. EV1+ and VV1-, or EV2+ and VV1-
        2. Between NE+ and NE-
        Tester Range 5 V/DIV., 20 ms./DIV.
        Condition Idling with warm engine

        HINT:

        The wavelength becomes shorter as the engine speed increases.

        Fig 6: Identifying Waveform 5
        G06023510Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. WAVEFORM 6
      1. Variable Valve Timing (VVT) sensor for intake side signal (A)
      2. Crankshaft position sensor signal (B)
        WAVEFORM 6 REFERENCE

        ECM Terminal Name
        1. Between VV1+ and VV1-, VV2+ and VV2-
        2. Between NE+ and NE-
        Tester Range 5 V/DIV., 20 ms./DIV.
        Condition Idling with warm engine

        HINT:

        The wavelength becomes shorter as the engine speed increases.

        Fig 7: Identifying Waveform 6
        G06023511Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. WAVEFORM 7
      1. Igniter IGT signal (from ECM to igniter) and igniter IGF signal (from igniter to ECM)
        WAVEFORM 7 REFERENCE

        ECM Terminal Name
        1. Between IGT (1 to 6) and E1
        2. Between IGF1 and E1
        Tester Range 2 V/DIV., 20 ms./DIV.
        Condition Idling with warm engine

        HINT:

        The wavelength becomes shorter as the engine speed increases.

        Fig 8: Identifying Waveform 7
        G06023512Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. WAVEFORM 8
      1. Purge VSV for EVAP system operation signal
        WAVEFORM 8 REFERENCE

        ECM Terminal Name Between PRG and E1
        Tester Range 10 V/DIV., 50 ms./DIV.
        Condition Idling with warm engine

        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: Identifying Waveform 8
        G06023513Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    9. WAVEFORM 9
      1. Vehicle speed signal
        WAVEFORM 9 REFERENCE

        ECM Terminal Name Between SPD and E1
        Tester Range 2 V/DIV., 20 ms./DIV.
        Condition 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: Identifying Waveform 9
          G06023514Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    10. WAVEFORM 10
      1. Throttle actuator operation signal (positive terminal)
        WAVEFORM 10 REFERENCE

        ECM Terminal Name Between M+ and ME01
        Tester Range 5 V/DIV., 1 ms./DIV.
        Condition Idling with warm engine

        HINT:

        The duty ratio varies depending on the throttle actuator operation.

        Fig 11: Identifying Waveform 10
        G06023515Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    11. WAVEFORM 11
      1. Throttle actuator operation signal (negative terminal)
        WAVEFORM 11 REFERENCE

        ECM Terminal Name Between M- and ME01
        Tester Range 5 V/DIV., 1 ms./DIV.
        Condition Idling with warm engine

        HINT:

        The duty ratio varies depending on the throttle actuator operation.

        Fig 12: Identifying Waveform 11
        G06023516Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    12. WAVEFORM 12
      1. Engine speed signal
        WAVEFORM 12 REFERENCE

        ECM Terminal Name Between TACH and E1
        Tester Range 5 V/DIV., 10 ms./DIV.
        Condition Idling with warm engine

        HINT:

        The wavelength becomes shorter as the engine speed increases.

        Fig 13: Identifying Waveform 12
        G06023517Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    13. WAVEFORM 13
      1. CAN communication signal
        WAVEFORM 13 REFERENCE

        ECM Terminal Name Between CANH and E1, CAN+ and E1 or CANP and E1
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Engine stopped and ignition switch ON

        HINT:

        The waveform varies depending on the CAN communication signal.

        Fig 14: Identifying Waveform 13
        G06023518Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    14. WAVEFORM 14
      1. CAN communication signal
        WAVEFORM 14 REFERENCE

        ECM Terminal Name Between CANL and E1, CAN- and E1 or CANN and E1
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Engine stopped and ignition switch ON

        HINT:

        The waveform varies depending on the CAN communication signal.

        Fig 15: Identifying Waveform 14
        G06023519Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    15. WAVEFORM 15
      1. Air fuel ratio sensor and heated oxygen sensor heater operation signal
        WAVEFORM 15 REFERENCE

        ECM Terminal Name Between HA1A and E04, HA2A and E05, HT1B and E03 or HT2B and E03
        Tester Range 5 V/DIV., 10 ms./DIV.
        Condition Idling

        HINT:

        The wavelength becomes shorter as the engine speed increases.

        Fig 16: Identifying Waveform 15
        G06023520Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    16. WAVEFORM 16
      1. Crankshaft position sensor signal
        WAVEFORM 16 REFERENCE

        ECM Terminal Name Between NEO and E1
        Tester Range 5 V/DIV., 2 ms./DIV.
        Condition Idling with warm engine

        HINT:

        The wavelength becomes shorter as the engine speed increases.

        Fig 17: Identifying Waveform 16
        G06023005Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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