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Terminals Of ECM

  1. SFI SYSTEM 
    Fig 1: Identifying Terminals Of ECM Connectors
    G05247584Courtesy 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.

    TERMINALS REFERENCE CHART

    Symbols (Terminal No.) Wiring Colors Terminal Descriptions Conditions STD Voltages
    +B (A10-2) - E1 (B12-81) R - W-B Power source of ECM Engine switch on (IG) 9 to 14 V
    +B2 (A10-1) - E1 (B12-81) R - W-B Power source of ECM Engine switch on (IG) 9 to 14 V
    BATT (A10-20) - E1 (B12-81) Y - W-B Battery (for measuring the battery voltage and for the ECM memory) Always 9 to 14 V
    VPMP (A10-42) - E1 (B12-81) W - W-B Vent valve operation signal (built into pump module) Engine switch on (IG) 9 to 14 V
    MPMP (A10-34) - E1 (B12-81) G - W-B Vacuum pump operation signal (built into pump module) Vacuum pump OFF 0 to 3 V
    MPMP (A10-34) - E1 (B12-81) G - W-B Vacuum pump operation signal (built into pump module) Vacuum pump ON 9 to 14 V
    +BM (A10-3) - E1 (B12-81) LG - W-B Power source of ETCS throttle motor Always 9 to 14 V
    MREL (A10-44) - E1 (B12-81) O - W-B EFI relay operation signal Engine switch on (IG) 9 to 14 V
    IGSW (A10-28) - E1 (B12-81) Y - W-B Engine switch signal Engine switch on (IG) 9 to 14 V
    VCTA (B12-96) - ETA (B12-97) B-P Power source for throttle position sensor (specific voltage) Engine switch on (IG) 4.5 to 5.0 V
    VCV1 (B12-115) - E1 (B12-81) Y - W-B Power source for VVT sensor (specific voltage) Engine switch on (IG) 4.5 to 5.0 V
    VCE1 (B12-114) - E1 (B12-81) R - W-B Power source for VVT sensor (specific voltage) Engine switch on (IG) 4.5 to 5.0 V
    VCE2 (B12-112) - E1 (B12-81) LG - W-B Power source for VVT sensor (specific voltage) Engine switch on (IG) 4.5 to 5.0 V
    VCV2 (B12-113) - E1 (B12-81) R - W-B Power source for VVT sensor (specific voltage) Engine switch on (IG) 4.5 to 5.0 V
    FC (A10-7) - E1 (B12-81) Y - W-B C/OPEN relay operation signal (fuel pump control) Engine switch on (IG), Engine stopped 9 to 14 V
    FC (A10-7) - E1 (B12-81) Y - W-B C/OPEN relay operation signal (fuel pump control) Engine switch on (IG), Engine idling 0 to 1.5 V
    STP (A10-36) - E1 (B12-81) W - W-B Stop light switch signal W-Brake pedal depressed 7 5 to 14 V
    STP (A10-36) - E1 (B12-81) W - W-B Stop light switch signal W-Brake pedal released Below 1 5 V
    ST1- (A10-35) - E1 (B12-81) GR - W-B Stop light switch signal (opposite to STP terminal) Engine switch on (IG), W-Brake pedal depressed Below 1 5 V
    ST1- (A10-35) - E1 (B12-81) GR - W-B Stop light switch signal (opposite to STP terminal) Engine switch on (IG), W-Brake pedal released 7.5 to 14 V
    STAR (B12-63) - E1 (B12-81) R - W-B Starter relay control Engine switch on (IG) Below 1.5 V
    Cranking 6.0 V or more
    ACCR (A10-13) - E1 (B12-81) B - W-B ACC relay control signal Cranking Below 1.5 V
    VPA (A10-55) - E1 (B12-81) G - W-B Accelerator pedal position sensor signal (for engine control) Engine switch on (IG), Accelerator pedal fully released 0.5 to 1 1 V
    VPA (A10-55) - E1 (B12-81) G - W-B Accelerator pedal position sensor signal (for engine control) Engine switch on (IG), Accelerator pedal fully depressed 2.6 to 4.5 V
    VPA2 (A10-56) - EPA2 (A10-60) R-O Accelerator pedal position sensor signal (for sensor malfunction detection) Engine switch on (IG), Accelerator pedal fully released 1.2 to 2.0 V
    VPA2 (A10-56) - EPA2 (A10-60) R-O Accelerator pedal position sensor signal (for sensor malfunction detection) Engine switch on (IG), Accelerator pedal fully depressed 3.4 to 5.0 V
    EPA (A10-59) - VPA (A10-55) Y-G Accelerator pedal position sensor signal (for engine control) Engine switch on (IG), Accelerator pedal fully released 0.5 to 1 1 V
    EPA (A10-59) - VPA (A10-55) Y-G Accelerator pedal position sensor signal (for engine control) Engine switch on (IG), Accelerator pedal fully depressed 2.6 to 4 5 V
    EPA2 (A10-60) - VPA2 (A10-56) O-R Accelerator pedal position sensor signal (for sensor malfunction detection) Engine switch on (IG), Accelerator pedal fully released 1.2 to 20 V
    EPA2 (A10-60) - VPA2 (A10-56) O-R Accelerator pedal position sensor signal (for sensor malfunction detection) Engine switch on (IG), Accelerator pedal fully depressed 3.4 to 5.0 V
    PPMP (B12-77) - E1 (B12-81) L - W-B Pressure sensor signal (built into pump module) Engine switch on (IG) 3 to 3.6 V
    TC (A10-27) - E1 (B12-81) P - W-B Terminal TC of DLC3 Engine switch on (IG) 9 to 14 V
    VCPA (A10-57) - EPA (A10-59) B-Y Power source of accelerator pedal position sensor (for VPA) Engine switch on (IG) 4 5 to 5.0 V
    VCP2 (A10-58) - EPA2 (A10-60) L-O Power source of accelerator pedal position sensor (for VPA2) Engine switch on (IG) 4.5 to 5.0 V
    TACH (A10-15) - E1 (B12-81) B - W-B Engine speed signal (for combination meter) Idling Pulse generation (see  kwaveform 11)
    CCS (A10-40) - E1 (B12-81) GR - W-B Cruise control main switch signal Engine switch on (IG) CANCEL switch ON SET/COAST switch ON RES/ACC switch ON Main switch ON 10 to 16 V 6.6 to 10.1 V 4.5 to 7 1 V 2.3 to 4 0 V Below 1 V
    SPD (A10-8) - E1 (B12-81) V - W-B Vehicle speed signal from combination meter Engine switch on (IG), driving wheel rotated slowly Pulse generation (see  hwaveform 8)
    W (A10-24) - E1 (B12-81) BR - W-B Malfunction Indicator Lamp (MIL) operation signal Engine switch on (IG) Below 3.0 V
    W (A10-24) - E1 (B12-81) BR - W-B Malfunction Indicator Lamp (MIL) operation signal Idling 9 to 14 V
    CANH (A10-41) - E1 (B12-81) B - W-B CAN communication line Engine switch on (IG) Pulse generation (see  lwaveform 12)
    CANL (A10-49) - E1 (B12-81) W - W-B CAN communication line Engine switch on (IG) Pulse generation (see  mwaveform 13)
    E1 (B12-81) - Body ground W-B-- Earth (ground) circuit of ECM Always Below 1 V
    #10 (B12-45) - E01 (B12-22) B - W-B Fuel injector operation signal Engine switch on (IG) 9 to 14 V
    #20 (B12-85) - E01 (B12-22) R - W-B
    #30 (B12-44) - E01 (B12-22) Y - W-B
    #40 (B12-84) - E01 (B12-22) L - W-B
    #50 (B12-43) - E01 (B12-22) W-L - W-B
    #60 (B12-83) - E01 (B12-22) BR - W-B
    #10 (B12-45) - E01 (B12-22) B - W-B Fuel injector operation signal Idling Pulse generation (see  cwaveform 3)
    #20 (B12-85) - E01 (B12-22) R - W-B
    #30 (B12-44) - E01 (B12-22) Y - W-B
    #40 (B12-84) - E01 (B12-22) L - W-B
    #50 (B12-43) - E01 (B12-22) W-L - W-B
    #60 (B12-83) - E01 (B12-22) BR - W-B
    PSW (B12-70) - E1 (B12-81) B - W-B P/S pressure switch signal Engine switch on (IG) 9 to 14 V
    STA (A10-48) - E1 (B12-81) V - W-B Starter relay operation signal Cranking 9 to 14 V
    STSW (A10-14) - E1 (B12-81) R - W-B Starter relay operation signal Cranking 9 to 14 V
    OC2- (B12-51) - OC2+ (B12-52) R-BR Camshaft timing Oil Control Valve (OCV) operation signal (Intake side) Engine switch on (IG) Pulse generation (see  awaveform 1)
    OC2+ (B12-52) - OC2- (B12-51) BR-R Camshaft timing Oil Control Valve (OCV) operation signal (Intake side) Engine switch on (IG) Pulse generation (see  awaveform 1)
    OC1- (B12-57) - OC1+ (B12-58) B-W Camshaft timing Oil Control Valve (OCV) operation signal (Intake side) Engine switch on (IG) Pulse generation (see  awaveform 1)
    OC1+ (B12-58) - OC1- (B12-57) W-B Camshaft timing Oil Control Valve (OCV) operation signal (Intake side) Engine switch on (IG) Pulse generation (see  awaveform 1)
    VV2+ (B12-67) - VV2- (B12-90) W-B Variable Valve Timing (VVT) sensor signal (Intake side) Idling Pulse generation (see  ewaveform 5)
    VV1+ (B12-69) - VV1- (B12-92) L-LG Variable Valve Timing (VVT) sensor signal (Intake side) Idling Pulse generation (see  ewaveform 5)
    NE- (B12-111) - NE+(B12-110) R-G Crankshaft position sensor signal Idling Pulse generation (see  ewaveform 5)
    NE+ (B12-110) - NE- (B12-111) G-R Crankshaft position sensor signal Idling Pulse generation (see  ewaveform 5)
    EV2- (B12-89) - EV2+ (B12-66) L - G-R Variable Valve Timing (VVT) sensor signal (Exhaust side) Idling Pulse generation (see  ewaveform 5)
    EV2+ (B12-66) - EV2- (B12-89) G-R - L Variable Valve Timing (VVT) sensor signal (Exhaust side) Idling Pulse generation (see  ewaveform 5)
    EV1- (B12-91) - EV1+ (B12-68) B-Y Variable Valve Timing (VVT) sensor signal (Exhaust side) Idling Pulse generation (see  ewaveform 5)
    EV1+ (B12-68) - EV1- (B12-91) Y-B Variable Valve Timing (VVT) sensor signal (Exhaust side) Idling Pulse generation (see  ewaveform 5)
    OE1+ (B12-16) - OE1- (B12-17) L-LG Camshaft timing Oil Control Valve (OCV) operation signal (Exhaust side) Engine switch on (IG) Pulse generation (see  awaveform 1)
    OE2+ (B12-14) - OE2- (B12-15) W-L-Y Camshaft timing Oil Control Valve (OCV) operation signal (Exhaust side) Engine switch on (IG) Pulse generation (see  awaveform 1)
    VV2- (B12-90) - VV2+ (B12-67) B-W Variable Valve Timing (VVT) sensor signal (Intake side) Idling Pulse generation (see  ewaveform 5)
    VV1- (B12-92) - VV1+ (B12-69) LG-L Variable Valve Timing (VVT) sensor signal (Intake side) Idling Pulse generation (see  ewaveform 5)
    OE1- (B12-17) - OE1+ (B12-16) LG-L Camshaft timing Oil Control Valve (OCV) operation signal (Exhaust side) Engine switch on (IG) Pulse generation (see  awaveform 1)
    OE2- (B12-15) - OE2+ (B12-14) Y - W-L Camshaft timing Oil Control Valve (OCV) operation signal (Exhaust side) Engine switch on (IG) Pulse generation (see  awaveform 1)
    HT1B (B12-48) - E1 (B12-81)
    HT2B (B12-47) - E1 (B12-81)    		 LG - W-B
    Y - W-B    		 Heated oxygen sensor heater operation signal Idling Below 3 0V
    HT1B (B12-48) - E1 (B12-81)
    HT2B (B12-47) - E1 (B12-81)    		 LG - W-B
    Y - W-B    		 Heated oxygen sensor heater operation signal Engine switch on (IG) 9 to 14 V
    M- (B12-18) - ME01 (B12-20) R-B Throttle drive motor operation signal (negative terminal) Idling with warm engine Pulse generation (see  jwaveform 10)
    M+ (B12-19) - ME01 (B12-20) G-B Throttle drive motor operation signal (positive terminal) Idling with warm engine Pluse generation (see  iwaveform 9)
    E02 (B12-21) - Body ground B-W-- Earth (ground) circuit of ECM Always Below 1 V
    E01 (B12-22) - Body ground W-B-- Earth (ground) circuit of ECM Always Below 1 V
    IGT1 (B12-40) - E1 (B12-81) W - W-B Engine coil with igniter (ignition signal) Idling Pulse generation (see  fwaveform 6)
    IGT2 (B12-39) - E1 (B12-81) G-R - W-B
    IGT3 (B12-38) - E1 (B12-81) G - W-B
    IGT4 (B12-37) - E1 (B12-81) LG - W-B
    IGT5 (B12-36) - E1 (B12-81) P - W-B
    IGT6 (B12-35) - E1 (B12-81) L-B - W-B
    GE01 (B12-41) - E1 (B12-81) G-R - W-B Shielded earth (ground) circuit of throttle drive motor Always Below 1 V
    OX1B (B12-88) - EX1B (B12-65)
    OX2B (B12-87) - EX2B (B12-64)    		 W-BR
    B - W-B    		 Heated oxygen sensor signal With engine speed at 2,500 rpm for 2 minutes after warming up Pulse generation (see  bwaveform 2)
    VTA2 (B12-99) - ETA (B12-97) W-L-P Throttle position sensor signal (for sensor malfunction detection) Engine switch on (IG), Accelerator pedal fully released 2.1 to 3.1 V
    VTA2 (B12-99) - ETA (B12-97) W-L-P Throttle position sensor signal (for sensor malfunction detection) Engine switch on (IG), Accelerator pedal fully depressed 4.5 to 5.0 V
    VTA1 (B12-98) - ETA (B12-97) Y-P Throttle position sensor signal (for engine control) Engine switch on (IG), Throttle valve fully closed 0.5 to 1.2 V
    VTA1 (B12-98) - ETA (B12-97) Y-P Throttle position sensor signal (for engine control) Engine switch on (IG), Throttle valve fully open 3.2 to 4.8 V
    THW (B12-79) - ETHW (B12-78) B-P Engine coolant temperature sensor signal Idling, Engine coolant temperature 80°C (176°F) 0.2 to 1.0 V
    THA (B12-71) - ETHA (B12-74) P - G-R Intake air temperature sensor signal Idling, Intake air temperature 20°C (68°F) 0.5 to 3.4 V
    IGF1 (B12-106) - E1 (B12-81) BR - W-B Engine coil with igniter (ignition confirmation signal) Engine switch on (IG) 4 5 to 5 0 V
    IGF1 (B12-106) - E1 (B12-81) BR - W-B Engine coil with igniter (ignition confirmation signal) Idling Pulse generation (see  fwaveform 6)
    AICV (A10-4) - E1 (B12-81) V - W-B VSV for Air intake control system operation signal Engine switch on (IG) 9 to 14 V
    E2G (B12-73) - E1 (B12-81) LG - W-B Earth (ground) circuit of sensor for mass air flow meter Always Below 1 V
    VG (B12-72) - E2G (B12-73) 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 (B12-107) - E1 (B12-81) B-W - W-B VSV for ACIS (Acoustic Control Induction System) operation signal Engine switch on (IG) 9 to 14 V
    PRG (B12-108) - E1 (B12-81) G-R - W-B Purge VSV for EVAP system operation signal Engine switch on (IG) 9 to 14 V
    PRG (B12-108) - E1 (B12-81) G-R - W-B Purge VSV for EVAP system operation signal Idling Pulse generation (see  gwaveform 7)
    HA2A (B12-109) - E05 (B12-46) B-W - W A/F sensor heater operation signal Idling Below 3.0 V
    HA2A (B12-109) - E05 (B12-46) B-W - W A/F sensor heater operation signal Engine switch on (IG) 9 to 14 V
    HA1A (B12-86) - E04 (B12-23) G-W A/F sensor heater operation signal Idling Below 3.0 V
    HA1A (B12-86) - E04 (B12-23) G-W A/F sensor heater operation signal Engine switch on (IG) 9 to 14 V
    ME01 (B12-20) - E1 (B12-81) B - W-B Earth (ground) circuit of ECM Always Below 1 V
    E03 (B12-104) - E1 (B12-81) B - W-B Earth (ground) circuit of ECM Always Below 1 V
    HT2B (B12-47) - E1 (B12-81)
    HT1B (B12-48) - E1 (B12-81)    		 Y - W-B
    LG - W-B    		 Heated oxygen sensor heater operation signal Idling Below 3.0 V
    HT2B (B12-47) - E1 (B12-81)
    HT1B (B12-48) - E1 (B12-81)    		 Y - W-B
    LG - W-B    		 Heated oxygen sensor heater operation signal Engine switch on (IG) 9 to 14 V
    E05 (B12-46) - E1 (B12-81) W - W-B Earth (ground) circuit of ECM Always Below 1 V
    E04 (B12-23) - E1 (B12-81) W - W-B Earth (ground) circuit of ECM Always Below 1 V
    NSW (B12-62) - E1 (B12-81) L-B - W-B Park/Neutral position switch signal Engine switch on (IG), Shift lever position P or N Below 3 0 V
    NSW (B12-62) - E1 (B12-81) L-B - W-B Park/Neutral position switch signal Engine switch on (IG), Shift lever position other than P or N 9 to 14 V
    EKN2 (B12-117) - KNK2 (B12-118) W-B Earth (ground) circuit of knock sensor With engine speed at 4,000 rpm after warming up Pulse generation (see  dwaveform 4)
    KNK2 (B12-118) - EKN2 (B12-117) B-W Knock sensor signal With engine speed at 4,000 rpm after warming up Pulse generation (see  dwaveform 4)
    A1A+ (B12-93) - E1 (B12-81) L - W-B A/F sensor signal Engine switch on (IG) 3.3 V(1)
    A1A+ (B12-93) - E1 (B12-81) L - W-B A/F sensor signal Engine switch on (IG) 3.0 V(1)
    A2A+ (B12-120) - E1 (B12-81) BR - W-B A/F sensor signal Engine switch on (IG) 3.3 V(1)
    A2A+ (B12-120) - E1 (B12-81) BR - W-B A/F sensor signal Engine switch on (IG) 3.0 V(1)
    EKNK (B12-94) - KNK1 (B12-95) G-R Earth (ground) circuit of knock sensor With engine speed at 4,000 rpm after warming up Pulse generation (see  dwaveform 4)
    KNK1 (B12-95) - EKNK (B12-94) R-G Knock sensor signal With engine speed at 4,000 rpm after warming up Pulse generation (see  dwaveform 4)
    A1A- (B12-116) - E1 (B12-81) P - W-B A/F sensor Engine switch on (IG) 3 3 V(1)
    A1A- (B46-116) - E1 (B12-81) P - W-B A/F sensor Engine switch on (IG) 3 0 V(1)
    A2A- (B12-119) - E1 (B12-81) Y - W-B A/F sensor Engine switch on (IG) 3.3 V(1)
    A2A- (B12-119) - E1 (B12-81) Y - W-B A/F sensor Engine switch on (IG) 3 0 V(1)
    OX2B (B12-87) - EX2B (B12-64)
    OX1B (B12-88) - EX1B (B12-65)    		 B - W-B
    W-BR    		 Heated oxygen sensor signal With engine speed at 2,500 rpm for 2 minutes after warming up Pulse generation (see  bwaveform 2)
    P (B12-24) - E1 (B12-81) B-W - W-B P shift position switch signal Engine switch on (IG) and shift lever P position 9 to 14 V
    P (B12-24) - E1 (B12-81) B-W - W-B P shift position switch signal Engine switch on (IG) and shift lever except P position Below 1 V
    R (B12-25) - E1 (B12-81) P - W-B R shift position switch signal Engine switch on (IG) and shift lever R position 9 to 14 V
    R (B12-25) - E1 (B12-81) P - W-B R shift position switch signal Engine switch on (IG) and shift lever except R position Below 1 V
    N (B12-27) - E1 (B12-81) L-B - W-B N shift position switch signal Engine switch on (IG) and shift lever N position 9 to 14 V
    N (B12-27E1 (B12-81) L-B - W-B N shift position switch signal Engine switch on (IG) and shift lever except N position Below 1 V
    D (B12-26) - E1 (B12-81) G - W-B D shift position switch signal Engine switch on (IG) and shift lever D position 9 to 14 V
    D (B12-26) - E1 (B12-81) G - W-B D shift position switch signal Engine switch on (IG) and shift lever except D position Below 1 V
    S (A10-25) - E1 (B12-81) Y - W-B S shift position switch signal Engine switch on (IG) and shift lever S position 9 to 14 V
    S (A10-25) - E1 (B12-81) Y - W-B S shift position switch signal Engine switch on (IG) and shift lever except S position Below 1 V
    SFTD (A10-51) - E1 (B12-81) L - W-B Down shift switch signal Engine switch on (IG) and shift lever "-" position 9 to 14 V
    SFTD (A10-51) - E1 (B12-81) L - W-B Down shift switch signal Engine switch on (IG) and shift lever except"-" position (Down shift) Below 1 V
    SFTU (A10-16) - E1 (B12-81) R - W-B Up shift switch signal Engine switch on (IG) and shift lever "+" position 9 to 14 V
    SFTU (A10-16) - E1 (B12-81) R - W-B Up shift switch signal Engine switch on (IG) and shift lever except "+" position (Up shift) Below 1 V
    (1) The ECM terminal voltage is constant regardless of the output voltage from the sensor.
    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

        HINT:

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

        Fig 3: Identifying Waveform 2
        G04973437Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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
        Fig 5: Identifying Waveform 4
        G04973439Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT:

        • The wavelength becomes shorter as the engine rpm increases.
        • The waveforms and amplitudes displayed differ slightly depending on the vehicle.
    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 EVI-, or EV2+ and EV2- (2) Between NE+ and NE-
        Tester Ranges 5 V/DIV, 20 ms/DIV.
        Conditions Idling
        Fig 6: Identifying Waveform 5
        G04973440Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT:

        The wavelength becomes shorter as the engine rpm increases.

    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 2V/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

        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 8: Identifying Waveform 7
        G04973442Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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)
        Fig 9: Identifying Waveform 8
        G04973443Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        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.
    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

        HINT:

        The duty ratio varies depending on the throttle actuator operation.

        Fig 10: Identifying Waveform 9
        G04973444Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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

        HINT:

        The duty ratio varies depending on the throttle actuator operation.

        Fig 11: Identifying Waveform 10
        G04973445Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    11. WAVEFORM 11
      1. Engine speed signal
        WAVEFORM 11 REFERENCE

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

        HINT:

        The wavelength becomes shorter as the engine rpm increases.

        Fig 12: Identifying Waveform 11
        G04973446Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    12. WAVEFORM 12
      1. CAN communication signal
        WAVEFORM 12 REFERENCE

        ECM Terminal Names Between CANH and E1
        Tester Ranges 1 V/DIV, 10 μsec/DIV.
        Conditions Engine stops and engine switch on (IG)

        HINT:

        The waveform varies depending on the CAN communication signal.

        Fig 13: Identifying Waveform 12
        G05247596Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    13. WAVEFORM 13
      1. CAN communication signal
        WAVEFORM 13 REFERENCE

        ECM Terminal Names Between CANL and E1
        Tester Ranges 1 V/DIV, 10 μsec/DIV.
        Conditions Engine stops and engine switch on (IG)

        HINT:

        The waveform varies depending on the CAN communication signal.

        Fig 14: Identifying Waveform 13
        G05247597Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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