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Terminals Of ECM

  1. SFI SYSTEM 
    Fig 1: D1 & A43 SFI System Connector Terminal Identification
    GTY281099Courtesy 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.

    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    A43-3 (+B) - D1-81 (E1) BR - BR Power source of ECM Engine switch on (IG) 11 to 14 V
    A43-2 (+B2) - D1-81 (E1) L - BR Power source of ECM Engine switch on (IG) 11 to 14 V
    A43-1 (BATT) - D1-81 (E1) LG - BR Battery (for measuring the battery voltage and for the ECM memory) Always 11 to 14 V
    D1-41 (+BM) - D1-81 (E1) L - BR Power source of electronic throttle control system throttle motor Always 11 to 14 V
    A43-34 (MREL) - D1-81 (E1) Y - BR EFI MAIN relay operation signal Engine switch on (IG) 11 to 14 V
    D1-80 (VCTA) - D1-79 (ETA) Y - B Power source for throttle position sensor (specific voltage) Engine switch on (IG) 4.5 to 5.5 V
    D1-67 (VCV1) - D1-81 (E1) W - BR Power source for camshaft position (VVT) sensor (specific voltage) Engine switch on (IG) 4.5 to 5.5 V
    D1-66 (VCV2) - D1-81 (E1) Y - BR Power source for camshaft position (VVT) sensor (specific voltage) Engine switch on (IG) 4.5 to 5.5 V
    A43-28 (IGSW) - D1-81 (E1) G - BR Engine switch signal Engine switch on (IG) 11 to 14 V
    A43-52 (FC) - D1-81 (E1) BE - BR C/OPN relay operation signal (fuel pump control) Engine switch on (IG) 11 to 14 V
    Idling 0 to 1.5 V
    A43-36 (STP) - D1-81 (E1) B - BR Stop light switch assembly signal Brake pedal depressed 7.5 to 14 V
    Brake pedal released 0 to 1.5 V
    A43-35 (ST1-) - D1-81 (E1) BR - BR Stop light switch assembly signal (opposite to STP terminal) Engine switch on (IG), brake pedal depressed 0 to 1.5 V
    Engine switch on (IG), brake pedal released 7.5 to 14 V
    A43-55 (VPA) - A43-58 (EPA) BE - P Accelerator pedal position sensor signal (for engine control) Engine switch on (IG), accelerator pedal fully released 0.5 to 1.1 V
    Engine switch on (IG), accelerator pedal fully depressed 2.6 to 4.5 V
    A43-56 (VPA2) - A43-60 (EPA2) GR - V Accelerator pedal position sensor signal (for sensor malfunction detection) Engine switch on (IG), accelerator pedal fully released 1.2 to 2.0 V
    Engine switch on (IG), accelerator pedal fully depressed 3.4 to 4.8 V
    A43-30 (VPMP) - D1-81 (E1) G - BR Vent valve
    (built into canister pump module)    		 Engine switch on (IG) 11 to 14 V
    A43-49 (MPMP) - D1-81 (E1) V - BR Leak detection pump
    (built into canister pump module)    		 Leak detection pump off 0 to 3.0 V
    Leak detection pump on 9 to 14 V
    D1-121 (PPMP) - D1-81 (E1) W-L - BR Canister pressure sensor
    (built into canister pump module)    		 Engine switch on (IG) 3.0 to 3.6 V
    A43-16 (TC) - D1-81 (E1) L - BR Terminal TC of DLC3 Engine switch on (IG) 11 to 14 V
    A43-57 (VCPA) - A43-58 (EPA) B - P Power source of accelerator pedal position sensor (for VPA) Engine switch on (IG) 4.5 to 5.5 V
    A43-59 (VCP2) - A43-60 (EPA2) LG - V Power source of accelerator pedal position sensor (for VPA2) Engine switch on (IG) 4.5 to 5.5 V
    A43-15 (TACH) - D1-81 (E1) W - BR Engine speed signal (for combination meter assembly) Idling with warm engine Pulse generation
    (see Fig 13waveform 12)
    A43-13 (SPD) - D1-81 (E1) SB - BR Vehicle speed signal from combination meter assembly Driving at 12 mph (20 km/h) Pulse generation
    (see Fig 10waveform 9)
    A43-24 (W) - D1-81 (E1) G - BR Malfunction Indicator Lamp (MIL) operation signal Engine switch on (IG) (MIL turns on) Below 3.0 V
    Idling (MIL turns off) 11 to 14 V
    A43-10 (CANH) - D1-81 (E1) G - BR CAN communication line Engine stopped and engine switch on (IG) Pulse generation
    (see Fig 14waveform 13)
    A43-11 (CANL) - D1-81 (E1) L - BR CAN communication line Engine stopped and engine switch on (IG) Pulse generation
    (see Fig 15waveform 14)
    D1-81 (E1) - Body ground BR - Body ground Earth (ground) circuit of ECM Always Below 1 Ω
    D1-86 (#10) - D1-43 (E01)
    D1-109 (#20) - D1-43 (E01)
    D1-85 (#30) - D1-43 (E01)
    D1-108 (#40) - D1-43 (E01)
    D1-84 (#50) - D1-43 (E01)
    D1-107 (#60) - D1-43 (E01)    		 L - W-B
    Y - W-B
    B - W-B
    W - W-B
    B-W - W-B
    G - W-B    		 Fuel injector assembly operation signal Engine switch on (IG) 11 to 14 V
    Idling with warm engine Pulse generation
    (see Fig 4waveform 3)
    A43-46 (STA) - D1-81 (E1) BE - BR Starter relay operation signal Cranking 5.5 V or more
    D1-52 (OC2+) - D1-51 (OC2-) P - L Camshaft timing oil control valve assembly operation signal (Intake side) Idling Pulse generation
    (see Fig 2waveform 1)
    D1-58 (OC1+) - D1-57 (OC1-) W - G-R Camshaft timing oil control valve assembly operation signal (Intake side) Idling Pulse generation
    (see Fig 2waveform 1)
    D1-87 (VV2+) - D1-88 (VV2-) P - B Camshaft position (VVT) sensor signal (Intake side) Idling with warm engine Pulse generation
    (see Fig 7waveform 6)
    D1-90 (VV1+) - D1-89 (VV1-) G - R Camshaft position (VVT) sensor signal (Intake side) Idling with warm engine Pulse generation
    (see Fig 7waveform 6)
    D1-111 (NE-) - D1-110 (NE+) G - R Crankshaft position sensor signal Idling with warm engine Pulse generation
    (see waveforms 5 Fig 6 and 6 Fig 7)
    D1-110 (NE+) - D1-111 (NE-) R - G Crankshaft position sensor signal Idling with warm engine Pulse generation
    (see waveforms 5 Fig 6 and 6 Fig 7)
    A43-7 (NEO) - D1-81 (E1) BR - BR Crankshaft position sensor signal Idling with warm engine Pulse generation (see Fig 17waveform 16)
    D1-64 (EV2+) - D1-89 (VV1-) W-L - R Camshaft position (VVT) sensor signal (Exhaust side) Idling with warm engine Pulse generation
    (see Fig 6waveform 5)
    D1-69 (EV1+) - D1-89 (VV1-) B - R Camshaft position (VVT) sensor signal (Exhaust side) Idling with warm engine Pulse generation
    (see Fig 6waveform 5)
    D1-56 (OE1+) - D1-55 (OE1-) G - R Camshaft timing oil control valve assembly operation signal (Exhaust side) Idling Pulse generation
    (see Fig 2waveform 1)
    D1-50 (OE2+) - D1-49 (OE2-) G-R - W Camshaft timing oil control valve assembly operation signal (Exhaust side) Idling Pulse generation
    (see Fig 2waveform 1)
    D1-18 (M-) - D1-82 (ME01) W - W-B Throttle actuator operation signal (negative terminal) Idling with warm engine Pulse generation
    (see Fig 12waveform 11)
    D1-19 (M+) - D1-82 (ME01) B - W-B Throttle actuator operation signal (positive terminal) Idling with warm engine Pulse generation
    (see Fig 11waveform 10)
    D1-42 (E02) - Body ground W-B - Body ground Earth (ground) circuit of ECM Always Below 1 Ω
    D1-40 (IGT1) - D1-81 (E1)
    D1-39 (IGT2) - D1-81 (E1)
    D1-38 (IGT3) - D1-81 (E1)
    D1-37 (IGT4) - D1-81 (E1)
    D1-36 (IGT5) - D1-81 (E1)
    D1-35 (IGT6) - D1-81 (E1)    		 L - BR
    P - BR
    R-B - BR
    L - BR
    Y - BR
    W-L - BR    		 Ignition coil assembly (ignition signal) Idling with warm engine Pulse generation
    (see Fig 8waveform 7)
    D1-17 (GE01) - D1-81 (E1) BR - BR Shielded earth (ground) circuit of throttle actuator Always Below 1 Ω
    D1-114 (OX1B) - D1-115 (EX1B)
    D1-112 (OX2B) - D1-113 (EX2B)    		 W - R-B
    B - BR    		 Heated oxygen sensor signal Engine speed is maintained at 2500 RPM for 2 minutes after warming up engine Pulse generation
    (see Fig 3waveform 2)
    D1-77 (VTA2) - D1-79 (ETA) P - B Throttle position sensor signal (for sensor malfunction detection) Engine switch on (IG), accelerator pedal fully released 2.1 to 3.1 V
    Engine switch on (IG), accelerator pedal fully depressed 4.6 to 5.0 V
    D1-78 (VTA1) - D1-79 (ETA) W - B Throttle position sensor signal (for engine control) Engine switch on (IG), accelerator pedal fully released 0.5 to 1.1 V
    Engine switch on (IG), accelerator pedal fully depressed 3.2 to 4.8 V
    D1-76 (THW) - D1-97 (ETHW) G - BR Engine coolant temperature sensor signal Idling, engine coolant temperature 60 to 120°C (140 to 248°F) 0.2 to 1.0 V
    D1-73 (THA) - D1-98 (ETHA) L - W-B Intake air temperature sensor signal Idling, intake air temperature 0 to 80°C (32 to 176°F) 0.5 to 3.4 V
    D1-104 (IGF1) - D1-81 (E1) LG - BR Ignition coil assembly (ignition confirmation signal) Engine switch on (IG) 4.5 to 5.5 V
    Idling with warm engine Pulse generation
    (see Fig 8waveform 7)
    D1-61 (AICV) - D1-81 (E1) R - BR Vacuum switching valve for air intake control system operation signal Engine switch on (IG) 11 to 14 V
    D1-74 (VG) - D1-75 (E2G) R - LG Mass air flow meter sub-assembly signal Idling, shift lever in P or N, A/C switch off 0 to 3.0 V
    D1-62 (ACIS) - D1-81 (E1) Y - BR Intake air control valve assembly for ACIS (Acoustic Control Induction System) operation signal Engine switch on (IG) 11 to 14 V
    D1-63 (PRG) - D1-81 (E1) W-L - BR Purge VSV for EVAP system operation signal Engine switch on (IG) 11 to 14 V
    Idling with warm engine Pulse generation
    (see Fig 9waveform 8)
    D1-20 (HA2A) - D1-21 (E05) R - BR Air fuel ratio sensor heater operation signal Idling Pulse generation (see Fig 16waveform 15)
    Engine switch on (IG) 11 to 14 V
    D1-22 (HA1A) - D1-23 (E04) B-W - W-B Air fuel ratio sensor heater operation signal Idling Pulse generation (see Fig 16waveform 15)
    Engine switch on (IG) 11 to 14 V
    D1-44 (HT2B) - D1-46 (E03) W-L - W-B Heated oxygen sensor heater operation signal Idling Below 3.0 V
    Engine switch on (IG) 11 to 14 V
    D1-45 (HT1B) - D1-46 (E03) R - W-B Heated oxygen sensor heater operation signal Idling Below 3.0 V
    Engine switch on (IG) 11 to 14 V
    D1-83 (ACM) - D1-81 (E1) P - BR Duty vacuum switching valve for active control engine mount system operation signal Engine switch on (IG) 11 to 14 V
    D1-120 (NSW) - D1-81 (E1) G-R - BR Park/Neutral position switch assembly signal Engine switch on (IG), shift lever in P or N Below 3.0 V
    Engine switch on (IG), shift lever in any position other than P or N 11 to 14 V
    D1-117 (KNK2) - D1-116 (EKN2) R - G Knock control sensor signal Engine speed maintained at 4000 RPM after warming up engine Pulse generation
    (see Fig 5waveform 4)
    D1-94 (KNK1) - D1-93 (EKNK) B - W Knock control sensor signal Engine speed maintained at 4000 RPM after warming up engine Pulse generation
    (see Fig 5waveform 4)
    D1-126 (A1A+) - D1-81 (E1) BR - BR Air fuel ratio sensor Engine switch on (IG) 3.3 V*
    D1-125 (A1A-) - D1-81 (E1) Y - BR Air fuel ratio sensor Engine switch on (IG) 3.0 V*
    D1-103 (A2A+) - D1-81 (E1) P - BR Air fuel ratio sensor Engine switch on (IG) 3.3 V*
    D1-102 (A2A-) - D1-81 (E1) L - BR Air fuel ratio sensor Engine switch on (IG) 3.0 V*
    D1-2 (P) - D1-81 (E1) B-W - BR P shift position switch signal Engine switch on (IG) and shift lever in P 11 to 14 V
    Engine switch on (IG) and shift lever in any position other than P 0 to 1.5 V
    D1-26 (R) - D1-81 (E1) R-B - BR R shift position switch signal Engine switch on (IG) and shift lever in R 11 to 14 V
    Engine switch on (IG) and shift lever in any position other than R 0 to 1.5 V
    D1-25 (N) - D1-81 (E1) LG - BR N shift position switch signal Engine switch on (IG) and shift lever in N 11 to 14 V
    Engine switch on (IG) and shift lever in any position other than N 0 to 1.5 V
    D1-27 (D) - D1-81 (E1) Y - BR D shift position switch signal Engine switch on (IG) and shift lever in D 11 to 14 V
    Engine switch on (IG) and shift lever in any position other than D 0 to 1.5 V
    A43-25 (S) - D1-81 (E1) L - BR S shift position switch signal Engine switch on (IG) and shift lever in S 11 to 14 V
    Engine switch on (IG) and shift lever in any position other than S 0 to 1.5 V
    A43-27 (SFTD) - D1-81 (E1) BE - BR Down shift switch signal Engine switch on (IG) and shift lever in S 11 to 14 V
    Engine switch on (IG) and shift lever in S, the "-" range (down shift) selected 0 to 1.5 V
    A43-38 (SFTU) - D1-81 (E1) W - BR Up shift switch signal Engine switch on (IG) and shift lever in S 11 to 14 V
    Engine switch on (IG) and shift lever in S, the "+" range (up shift) selected 0 to 1.5 V
    A43-48 (FPR) - D1-81 (E1) R - BR Fuel pump speed control Cranking 11 to 14 V
    Idling with warm engine 0 to 1.5 V
    D1-24 (CAN+) - D1-81 (E1) L - BR CAN communication line Engine stopped and engine switch on (IG) Pulse generation
    (see Fig 14waveform 13)
    D1-1 (CAN-) - D1-81 (E1) R - BR CAN communication line Engine stopped and engine switch on (IG) Pulse generation
    (see Fig 15waveform 14)
    A43-8 (CANP) - D1-81 (E1) B - BR CAN communication line Engine stopped and engine switch on (IG) Pulse generation (see Fig 14waveform 13)
    A43-9 (CANN) - D1-81 (E1) W - BR CAN communication line Engine stopped and engine switch on (IG) Pulse generation (see Fig 15waveform 14)
    D1-32 (ALT) - D1-81 (E1) L - BR Generator assembly Engine switch on (IG) 11 to 14 V
    A43-33 (ELS2) - Body ground Y - Body ground Electric load Engine switch on (IG), and appliance 50 W or more 6.0 V or more

    *: The ECM terminal voltage is constant regardless of the output voltage from the sensor.

    1. WAVEFORM 1
      Fig 2: Identifying Waveform 1
      GTY219442Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Camshaft timing oil control valve assembly operation signal
        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
    2. WAVEFORM 2
      Fig 3: Identifying Waveform 2
      GTY286446Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Heated oxygen sensor signal
        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 and O2S B2S2 shows the ECM values from the heated oxygen sensor.

    3. WAVEFORM 3
      Fig 4: Identifying Waveform 3
      GTY315826Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Fuel injector assembly operation signal
        ECM Terminal Name Between #10 (to #60) and E01
        Tester Range 20 V/DIV., 20 ms./DIV.
        Condition Idling with warm engine

        HINT: 

        The wavelength becomes shorter as the engine speed increases.

    4. WAVEFORM 4
      Fig 5: Identifying Waveform 4
      GTY249338Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Knock control sensor signal
        ECM Terminal Name Between KNK1 and EKNK, or KNK2 and EKN2
        Tester Range 1 V/DIV., 1 ms./DIV.
        Condition Engine speed 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.
    5. WAVEFORM 5
      Fig 6: Identifying Waveform 5
      GTY179531Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Variable Valve Timing (VVT) sensor for exhaust side signal (A)
      2. Crankshaft position sensor signal (B)
        ECM Terminal Name (A) EV1+ and VV1-, or EV2+ and VV1-
        (B) 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.

    6. WAVEFORM 6
      Fig 7: Identifying Waveform 6
      GTY184605Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Variable Valve Timing (VVT) sensor for intake side signal (A)
      2. Crankshaft position sensor signal (B)
        ECM Terminal Name (A) Between VV1+ and VV1-, VV2+ and VV2-
        (B) 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.

    7. WAVEFORM 7
      Fig 8: Identifying Waveform 7
      GTY249082Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Igniter IGT signal (from ECM to igniter) and igniter IGF signal (from igniter to ECM)
        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.

    8. WAVEFORM 8
      Fig 9: Identifying Waveform 8
      GTY317179Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Purge VSV operation signal
        ECM Terminal Name Between PRG and E1
        Tester Range 10 V/DIV., 20 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.

    9. WAVEFORM 9
      Fig 10: Identifying Waveform 9
      GTY248326Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Vehicle speed signal
        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.

    10. WAVEFORM 10
      Fig 11: Identifying Waveform 10
      GTY290954Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Throttle actuator positive terminal signal
        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.

    11. WAVEFORM 11
      Fig 12: Identifying Waveform 11
      GTY292199Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Throttle actuator negative terminal signal
        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.

    12. WAVEFORM 12
      Fig 13: Identifying Waveform 12
      GTY249664Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Engine speed signal
        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.

    13. WAVEFORM 13
      Fig 14: Identifying Waveform 13
      GTY258962Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. CAN communication signal
        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 engine switch on (IG)

        HINT: 

        The waveform varies depending on the CAN communication signal.

    14. WAVEFORM 14
      Fig 15: Identifying Waveform 14
      GTY229520Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. CAN communication signal
        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 engine switch on (IG)

        HINT: 

        The waveform varies depending on the CAN communication signal.

    15. WAVEFORM 15
      Fig 16: Identifying Waveform 15
      GTY238005Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Air fuel ratio sensor heater operation signal
        ECM Terminal Name Between HA1A and E04 or HA2A and E05
        Tester Range 5 V/DIV., 10 ms./DIV.
        Condition Idling
    16. WAVEFORM 16
      Fig 17: Identifying Waveform 16
      GTY264743Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Crankshaft position sensor signal
        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.

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