2011 Lexus ES 350FACTORY OEM SERVICE PROCEDURE

Terminals Of ECM

  1. SFI SYSTEM 
    Fig 1: Identifying SFI System Connector Terminal Identification
    GTY145538Courtesy 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 graphic above can be used as a reference to identify the ECM terminal locations.

    Symbols (Terminal No.) Wiring Colors Terminal Descriptions Conditions Specified Condition
    +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 canister pump module) Engine switch on (IG) 9 to 14 V
    MPMP (A10-34) - E1 (B12-81) G - W-B Leak detection pump operation signal (built into canister pump module) Leak detection pump OFF 0 to 3 V
    MPMP (A10-34) - E1 (B12-81) G - W-B Leak detection pump operation signal (built into canister pump module) Leak detection 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) BE - 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/OPN 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/OPN 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 - BE 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 - BE Accelerator pedal position sensor signal (for sensor malfunction detection) Engine switch on (IG), Accelerator pedal fully depressed 3.4 to 4.7 V
    PPMP (B12-77) - E1 (B12-81) L - W-B Pressure sensor signal (built into canister pump module) Engine switch on (IG) 3 to 3.6 V
    VCPP (B12-75) - EPPM (B12-76) R - G Power source for canister pressure sensor (specific voltage) Engine switch on (IG) 4.5 to 5.5 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 - BE 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 waveform 12)
    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 waveform 9)
    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 stopped and engine switch on (IG) Pulse generation
    (see waveform 13)
    CANL (A10-49) - E1 (B12-81) W - W-B CAN communication line Engine stopped and engine switch on (IG) Pulse generation
    (see waveform 14)
    CAN+ (B12-2) - E1 (B12-81) B - W-B CAN communication line Engine stopped and engine switch on (IG) Pulse generation
    (see waveform 13)
    CAN- (B12-1) - E1 (B12-81) Y - W-B CAN communication line Engine stopped and engine switch on (IG) Pulse generation
    (see waveform 14)
    E1 (B12-81) - Body ground W-B - - Earth (ground) circuit of ECM Always Below 1 V
    #10 (B12-45) - E01 (B12-22)
    #20 (B12-85) - E01 (B12-22)
    #30 (B12-44) - E01 (B12-22)
    #40 (B12-84) - E01 (B12-22)
    #50 (B12-43) - E01 (B12-22)
    #60 (B12-83) - E01 (B12-22)    		 B - W-B
    R - W-B
    Y - W-B
    L - W-B
    W-L - W-B
    BR - W-B    		 Fuel injector operation signal Engine switch on (IG) 9 to 14 V
    #10 (B12-45) - E01 (B12-22)
    #20 (B12-85) - E01 (B12-22)
    #30 (B12-44) - E01 (B12-22)
    #40 (B12-84) - E01 (B12-22)
    #50 (B12-43) - E01 (B12-22)
    #60 (B12-83) - E01 (B12-22)    		 B - W-B
    R - W-B
    Y - W-B
    L - W-B
    W-L - W-B
    BR - W-B    		 Fuel injector operation signal Idling Pulse generation
    (see waveform 3)
    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+ (B12-52) - OC2- (B12-51) BR - R Camshaft timing Oil Control Valve (OCV) operation signal (Intake side) Idling Pulse generation
    (see waveform 1)
    OC1+ (B12-58) - OC1- (B12-57) W - B Camshaft timing Oil Control Valve (OCV) operation signal (Intake side) Idling Pulse generation
    (see waveform 1)
    VV2+ (B12-67) - VV2- (B12-90) W - B Variable Valve Timing (VVT) sensor signal (Intake side) Idling Pulse generation
    (see waveform 5)
    VV1+ (B12-69) - VV1- (B12-92) L - LG Variable Valve Timing (VVT) sensor signal (Intake side) Idling Pulse generation
    (see waveform 5)
    NE+ (B12-110) - NE- (B12-111) G - R Crankshaft position sensor signal Idling Pulse generation
    (see waveform 5)
    EV2+ (B12-66) - EV2- (B12-89) G-R - L Variable Valve Timing (VVT) sensor signal (Exhaust side) Idling Pulse generation
    (see waveform 6)
    EV1+ (B12-68) - EV1- (B12-91) Y - B Variable Valve Timing (VVT) sensor signal (Exhaust side) Idling Pulse generation
    (see waveform 6)
    OE1+ (B12-16) - OE1- (B12-17) L - LG Camshaft timing Oil Control Valve (OCV) operation signal (Exhaust side) Idling Pulse generation
    (see waveform 1)
    OE2+ (B12-14) - OE2- (B12-15) W-L - Y Camshaft timing Oil Control Valve (OCV) operation signal (Exhaust side) Idling Pulse generation
    (see waveform 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 3.0 V
    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 waveform 11)
    M+ (B12-19) - ME01 (B12-20) G - B Throttle drive motor operation signal (positive terminal) Idling with warm engine Pulse generation
    (see waveform 10)
    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)
    IGT2 (B12-39) - E1 (B12-81)
    IGT3 (B12-38) - E1 (B12-81)
    IGT4 (B12-37) - E1 (B12-81)
    IGT5 (B12-36) - E1 (B12-81)
    IGT6 (B12-35) - E1 (B12-81)    		 W - W-B
    G-R - W-B
    G - W-B
    LG - W-B
    P - W-B
    L-B - W-B    		 Engine coil with igniter (ignition signal) Idling Pulse generation
    (see waveform 7)
    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 2500 rpm for 2 minutes after warmed up Pulse generation
    (see waveform 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 4.6 to 5.0 V
    VTA1 (B12-98) - ETA (B12-97) Y - P Throttle position sensor signal (for engine control) Engine switch on (IG), Accelerator Pedal fully released 0.5 to 1.1 V
    VTA1 (B12-98) - ETA (B12-97) Y - P Throttle position sensor signal (for engine control) Engine switch on (IG), Accelerator Pedal fully depressed 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 waveform 7)
    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 waveform 8)
    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
    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 4000 rpm after warmed up Pulse generation
    (see waveform 4)
    KNK2 (B12-118) - EKN2 (B12-117) B - W Knock sensor signal With engine speed at 4000 rpm after warmed up Pulse generation
    (see waveform 4)
    A1A+ (B12-93) - A1A- (B12-116) L - P A/F sensor signal Idling 3.3 V*1
    A2A+ (B12-120) - A2A- (B12-119) BR - Y A/F sensor signal Idling 3.3 V*1
    EKNK (B12-94) - KNK1 (B12-95) G - R Earth (ground) circuit of knock sensor With engine speed at 4000 rpm after warmed up Pulse generation
    (see waveform 4)
    KNK1 (B12-95) - EKNK (B12-94) R - G Knock sensor signal With engine speed at 4000 rpm after warmed up Pulse generation
    (see waveform 4)
    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 (B12-27) - E1 (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
      Fig 2: Identifying Waveform 1
      GTY133983Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Camshaft timing Oil Control Valve (OCV) operation signal
        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
    2. WAVEFORM 2
      Fig 3: Identifying Waveform 2
      GTY136929Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Heated oxygen sensor signal
        ECM Terminal Names Between OX1B and EX1B, or OX2B and EX2B
        Tester Ranges 0.2 V/DIV., 200 ms./DIV.
        Conditions With engine speed at 2500 rpm for 2 minutes after warmed up

        HINT: 

        In the Data List, item O2S B1S2 and O2S B2S2 shows the ECM input values from the heated oxygen sensor.

    3. WAVEFORM 3
      Fig 4: Identifying Waveform 3
      GTY131036Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Fuel injector operation signal
        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.

    4. WAVEFORM 4
      Fig 5: Identifying Waveform 4
      GTY143366Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Knock sensor signal
        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 With engine speed at 4000 rpm after warmed up

        HINT: 

        • The wavelength becomes shorter as the engine rpm increases.
        • The waveforms and amplitudes displayed differ slightly depending on the vehicle.
    5. WAVEFORM 5
      Fig 6: Identifying Waveform 5
      GTY271701Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Variable Valve Timing (VVT) sensor signal
      2. Crankshaft position sensor signal
        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.

    6. WAVEFORM 6
      Fig 7: Identifying Waveform 6
      GTY279048Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Variable Valve Timing (VVT) sensor signal for exhaust camshaft
        ECM Terminal Names (1) Between 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.

    7. WAVEFORM 7
      Fig 8: Identifying Waveform 7
      GTY249082Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Igniter IGT signal (from ECM to igniter) (1)
      2. Igniter IGF signal (from igniter to ECM) (2)
        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

        HINT: 

        The wavelength becomes shorter as the engine rpm increases.

    8. WAVEFORM 8
      Fig 9: Identifying Waveform 8
      GTY155437Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Purge VSV for EVAP system operation signal
        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, check the waveform again after idling for 10 minutes or more.

    9. WAVEFORM 9
      Fig 10: Identifying Waveform 9
      GTY125554Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Vehicle speed signal
        ECM Terminal Names Between SPD and E1
        Tester Ranges 2 V/DIV., 20 ms./DIV.
        Conditions Engine switch on (IG), driving wheel rotated slowly

        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.
    10. WAVEFORM 10
      Fig 11: Identifying Waveform 10
      GTY141292Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Throttle drive motor operation signal (positive terminal)
        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.

    11. WAVEFORM 11
      Fig 12: Identifying Waveform 11
      GTY135968Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Throttle drive motor operation signal (negative terminal)
        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.

    12. WAVEFORM 12
      Fig 13: Identifying Waveform 12
      GTY145141Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Engine speed signal
        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.

    13. WAVEFORM 13
      Fig 14: Identifying Waveform 13
      GTY145067Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. CAN communication signal
        ECM Terminal Names Between CANH or CAN+ and E1
        Tester Ranges 1 V/DIV., 10 μsec./DIV.
        Conditions 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
      GTY145070Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. CAN communication signal
        ECM Terminal Names Between CANL or CAN- and E1
        Tester Ranges 1 V/DIV., 10 μsec./DIV.
        Conditions Engine stopped and engine switch on (IG)

        HINT: 

        The waveform varies depending on the CAN communication signal.

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  • • You smell fuel, burning insulation, or see smoke.
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