LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2009 >> RX 350 FWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control (SFI) System (Diagnostics - Introduction) >> SFI System >> Terminals Of ECM >> Terminals Of ECM

Terminals Of ECM

  1. SFI SYSTEM 
    Fig 1: Identifying Terminals Of ECM
    GTY137043Courtesy 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 illustration above can be used as a reference to identify the ECM terminal locations.

    Symbols (Terminal No.) Wiring Colors Terminal Descriptions Conditions Specified Condition
    +B (E5-1) - E1 (E7-1) R-Y - BR Power source of ECM Ignition switch ON 9 to 14 V
    +B2 (E5-2) - E1 (E7-1) L-B - BR Power source of ECM Ignition switch ON 9 to 14 V
    BATT (E5-3) - E1 (E7-1) B - BR Battery (for measuring the battery voltage and for the ECM memory) Always 9 to 14 V
    VPMP (E5-5) - E1 (E7-1) L - BR Vent valve operation signal (built into pump module) Ignition switch ON 9 to 14 V
    MPMP (E5-6) - E1 (E7-1) G - BR Vacuum pump operation signal (built into pump module) Vacuum pump OFF 0 to 3 V
    MPMP (E5-6) - E1 (E7-1) G - BR Vacuum pump operation signal (built into pump module) Vacuum pump ON 9 to 14 V
    +BM (E5-7) - E1 (E7-1) LG - BR Power source of ETCS throttle motor Always 9 to 14 V
    MREL (E5-8) - E1 (E7-1) LG - BR EFI MAIN relay operation signal Ignition switch ON 9 to 14 V
    IGSW (E5-9) - E1 (E7-1) G - BR Ignition switch signal Ignition switch ON 9 to 14 V
    FC (E5-10) - E1 (E7-1) O - BR C/OPEN relay operation signal (fuel pump control) Ignition switch ON 9 to 14 V
    FPR (E7-30) - E1 (E7-1) G - BR Fuel pump control Idling 9 to 14 V
    FPR (E7-30) - E1 (E7-1) G - BR Fuel pump control Cranking Below 3 V
    STP (E5-15) - E1 (E7-1) B - BR Stop light switch signal Brake pedal depressed 7.5 to 14 V
    STP (E5-15) - E1 (E7-1) B - BR Stop light switch signal Brake pedal released Below 1.5 V
    ST1- (E5-16) - E1 (E7-1) GR - BR Stop light switch signal (opposite to STP terminal) Ignition switch ON, Brake pedal depressed Below 1.5 V
    ST1- (E5-16) - E1 (E7-1) GR - BR Stop light switch signal (opposite to STP terminal) Ignition switch ON, Brake pedal released 7.5 to 14 V
    VPA (E5-18) - EPA (E5-20) W - V Accelerator pedal position sensor signal (for engine control) Ignition switch ON, Accelerator pedal fully released 0.5 to 1.1 V
    VPA (E5-18) - EPA (E5-20) W - V Accelerator pedal position sensor signal (for engine control) Ignition switch ON, Accelerator pedal fully depressed 2.6 to 4.5 V
    VPA2 (E5-19) - EPA2 (E5-21) R - O Accelerator pedal position sensor signal (for sensor malfunction detection) Ignition switch ON, Accelerator pedal fully released 1.2 to 2.0 V
    VPA2 (E5-19) - EPA2 (E5-21) R - O Accelerator pedal position sensor signal (for sensor malfunction detection) Ignition switch ON, Accelerator pedal fully depressed 3.4 to 5.0 V
    EPA (E5-20) - VPA (E5-18) V - W Accelerator pedal position sensor signal (for engine control) Ignition switch ON, Accelerator pedal fully released 0.5 to 1.1 V
    EPA (E5-20) - VPA (E5-18) V - W Accelerator pedal position sensor signal (for engine control) Ignition switch ON, Accelerator pedal fully depressed 2.6 to 4.5 V
    EPA2 (E5-21) - VPA2 (E5-19) O - R Accelerator pedal position sensor signal (for sensor malfunction detection) Ignition switch ON, Accelerator pedal fully released 1.2 to 2.0 V
    EPA2 (E5-21) - VPA2 (E5-19) O - R Accelerator pedal position sensor signal (for sensor malfunction detection) Ignition switch ON, Accelerator pedal fully depressed 3.4 to 5.0 V
    PPMP (E5-22) - E2 (E8-28) V - L Pressure sensor signal (built into pump module) Ignition switch ON 3 to 3.6 V
    TC (E5-23) - E1 (E7-1) BR - BR Terminal TC of DLC3 Ignition switch ON 9 to 14 V
    VCPA (E5-26) - EPA (E5-20) B - V Power source of accelerator pedal position sensor (for VPA) Ignition switch ON 4.5 to 5.0 V
    VCP2 (E5-27) - EPA2 (E5-21) SB - O Power source of accelerator pedal position sensor (for VPA2) Ignition switch ON 4.5 to 5.0 V
    TACH (E6-1) - E1 (E7-1) W - BR Engine speed signal (for combination meter) Idling Pulse generation
    (see waveform 11)
    CCS (E6-2) - E1 (E7-1) P - BR Cruise control main switch signal Ignition switch ON
    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
    CCHG*2 (E6-4) - E1 (E7-1) GR - BR Distance control switch signal Ignition switch ON
    Cruise control main switch ON
    MODE switch ON → MODE switch OFF    		 Below 1 V → 10 to 14 V
    SPD (E6-8) - E1 (E7-1) LG - BR Vehicle speed signal from combination meter Ignition switch ON, driving wheel rotated slowly Pulse generation
    (see waveform 8)
    W (E6-30) - E1 (E7-1) V - BR Malfunction Indicator Lamp (MIL) operation signal Ignition switch ON Below 3.0 V
    W (E6-30) - E1 (E7-1) V - BR Malfunction Indicator Lamp (MIL) operation signal Idling 9 to 14 V
    CANH (E6-33) - CANL (E6-34) R - W CAN communication circuit Ignition switch off 54 to 69 Ω
    CANL (E6-34) - CANH (E6-33) W - R CAN communication circuit Ignition switch off 54 to 69 Ω
    E1 (E7-1) - Body ground BR - - Earth (ground) circuit of ECM Always Below 1 V
    #10 (E7-2) - E01 (E8-7)
    #20 (E7-3) - E01 (E8-7)
    #30 (E7-4) - E01 (E8-7)
    #40 (E7-5) - E01 (E8-7)
    #50 (E7-6) - E01 (E8-7)
    #60 (E7-7) - E01 (E8-7)    		 L - W-B
    Y - W-B
    B - W-B
    W - W-B
    W-L - W-B
    G - W-B    		 Fuel injector operation signal Ignition switch ON 9 to 14 V
    #10 (E7-2) - E01 (E8-7)
    #20 (E7-3) - E01 (E8-7)
    #30 (E7-4) - E01 (E8-7)
    #40 (E7-5) - E01 (E8-7)
    #50 (E7-6) - E01 (E8-7)
    #60 (E7-7) - E01 (E8-7)    		 L - W-B
    Y - W-B
    B - W-B
    W - W-B
    W-L - W-B
    G - W-B    		 Fuel injector operation signal Idling Pulse generation
    (see waveform 3)
    PSW (E7-10) - E1 (E7-1) W-R - BR P/S pressure switch signal Ignition switch ON 9 to 14 V
    STA (E7-11) - E1 (E7-1) B - BR Starter relay operation signal Cranking 9 to 14 V
    OC2+ (E7-15) - OC2- (E7-14) BR - L-B Camshaft timing Oil Control Valve (OCV) operation signal (Intake side) Idling Pulse generation
    (see waveform 1)
    OC1+ (E7-17) - OC1- (E7-16) Y - L Camshaft timing Oil Control Valve (OCV) operation signal (Intake side) Idling Pulse generation
    (see waveform 1)
    OE2+ (E7-27) - OE2- (E7-32) G-R - W-L Camshaft timing Oil Control Valve (OCV) operation signal (Exhaust side) Idling Pulse generation
    (see waveform 1)
    OE1+ (E7-26) - OE1- (E7-32) W-R - B-W Camshaft timing Oil Control Valve (OCV) operation signal (Exhaust side) Idling Pulse generation
    (see waveform 1)
    VV2+ (E7-18) - VV2- (E7-28) P - L Variable Valve Timing (VVT) sensor signal (Intake side) Idling Pulse generation
    (see waveform 5)
    VV1+ (E7-19) - VV1- (E7-29) G - R Variable Valve Timing (VVT) sensor signal (Intake side) Idling Pulse generation
    (see waveform 5)
    NE+ (E7-21) - NE- (E7-20) W - B Crankshaft position sensor signal Idling Pulse generation
    (see waveform 5)
    EV2+ (E7-23) - EV2- (E7-22) W-L - R Variable Valve Timing (VVT) sensor signal (Exhaust side) Idling Pulse generation
    (see waveform 5)
    EV1+ (E7-25) - EV1- (E7-24) B - W Variable Valve Timing (VVT) sensor signal (Exhaust side) Idling Pulse generation
    (see waveform 5)
    HT1B (E8-1) - E1 (E7-1)
    HT2B (E9-5) - E1 (E7-1)    		 R - BR
    R - BR    		 Heated oxygen sensor heater operation signal Idling Below 3.0 V
    HT1B (E8-1) - E1 (E7-1)
    HT2B (E9-5) - E1 (E7-1)    		 R - BR
    R - BR    		 Heated oxygen sensor heater operation signal Ignition switch ON 9 to 14 V
    ACM (E8-3) - E1 (E7-1) G - BR VSV for active control mount system operation signal Ignition switch ON 9 to 14 V
    M- (E8-4) - ME01 (E9-3) W - W-B Throttle drive motor operation signal (negative terminal) Idling with warm engine Pulse generation
    (see waveform 10)
    M+ (E8-5) - ME01 (E9-3) B - W-B Throttle drive motor operation signal (positive terminal) Idling with warm engine Pluse generation
    (see waveform 9)
    E02 (E8-6) - Body ground W-B - - Earth (ground) circuit of ECM Always Below 1 V
    E01 (E8-7) - Body ground W-B - - Earth (ground) circuit of ECM Always Below 1 V
    IGT1 (E8-8) - E1 (E7-1)
    IGT2 (E8-9) - E1 (E7-1)
    IGT3 (E8-10) - E1 (E7-1)
    IGT4 (E8-11) - E1 (E7-1)
    IGT5 (E8-12) - E1 (E7-1)
    IGT6 (E8-13) - E1 (E7-1)    		 Y - BR
    P - BR
    G - BR
    L - BR
    B - BR
    BR - BR    		 Ignition coil with igniter (ignition signal) Idling Pulse generation
    (see waveform 6)
    GE01 (E8-17) - E1 (E7-1) - - BR Shielded earth (ground) circuit of throttle drive motor Always Below 1 V
    OX1B (E8-18) - E2 (E8-28)
    OX2B (E9-33) - E2 (E8-28)    		 B - L
    B - L    		 Heated oxygen sensor signal With engine speed at 2,500 rpm for 2 minutes after warming up Pulse generation
    (see waveform 2)
    VTA2 (E8-19) - E2 (E8-28) L-B - L Throttle position sensor signal (for sensor malfunction detection) Ignition switch ON, Accelerator pedal fully released 2.1 to 3.1 V
    VTA2 (E8-19) - E2 (E8-28) L-B - L Throttle position sensor signal (for sensor malfunction detection) Ignition switch ON, Accelerator pedal fully depressed 4.5 to 5.0 V
    VTA1 (E8-20) - E2 (E8-28) G-R - L Throttle position sensor signal (for engine control) Ignition switch ON, Throttle valve fully closed 0.5 to 1.2 V
    VTA1 (E8-20) - E2 (E8-28) G-R - L Throttle position sensor signal (for engine control) Ignition switch ON, Throttle valve fully open 3.2 to 4.8 V
    THW (E8-21) - E2 (E8-28) B-W - L Engine coolant temperature sensor signal Idling, Engine coolant temperature 80°C (176°F) 0.2 to 1.0 V
    THA (E8-22) - E2 (E8-28) W-L - L Intake air temperature sensor signal Idling, Intake air temperature 20°C (68°F) 0.5 to 3.4 V
    VC (E8-23) - E2 (E8-28) R - L Power source of sensors (specific voltage) Ignition switch ON 4.5 to 5.0 V
    IGF1 (E8-24) - E1 (E7-1) W - BR Ignition coil with igniter (ignition confirmation signal) Ignition switch ON 4.5 to 5.0 V
    IGF1 (E8-24) - E1 (E7-1) W - BR Ignition coil with igniter (ignition confirmation signal) Idling Pulse generation
    (see waveform 6)
    AICV (E8-27) - E1 (E7-1) P - BR VSV for Air intake control system operation signal Ignition switch ON 9 to 14 V
    E2 (E8-28) - E1 (E7-1) L - BR Earth (ground) circuit of sensors for ETCS Always Below 1 V
    E2G (E8-29) - E1 (E7-1) Y - BR Earth (ground) circuit of sensor for mass air flow meter Always Below 1 V
    VG (E8-30) - E2G (E8-29) R - Y Mass Air Flow (MAF) meter signal Idling, Shift lever position P or N, A/C switch OFF 0.5 to 3.0 V
    ACIS (E8-33) - E1 (E7-1) L - BR VSV for ACIS (Acoustic Control Induction System) operation signal Ignition switch ON 9 to 14 V
    PRG (E8-34) - E1 (E7-1) G - BR Purge VSV for EVAP system operation signal Ignition switch ON 9 to 14 V
    PRG (E8-34) - E1 (E7-1) G - BR Purge VSV for EVAP system operation signal Idling Pulse generation
    (see waveform 7)
    HA2A (E9-1) - E05 (E9-6) B - W-B A/F sensor heater operation signal Idling Below 3.0 V
    HA2A (E9-1) - E05 (E9-6) B - W-B A/F sensor heater operation signal Ignition switch ON 9 to 14 V
    HA1A (E9-2) - E04 (E9-7) L - W-B A/F sensor heater operation signal Idling Below 3.0 V
    HA1A (E9-2) - E04 (E9-7) L - W-B A/F sensor heater operation signal Ignition switch ON 9 to 14 V
    ME01 (E9-3) - E1 (E7-1) W-B - BR Earth (ground) circuit of ECM Always Below 1 V
    E03 (E9-4) - E1 (E7-1) W-B - BR Earth (ground) circuit of ECM Always Below 1 V
    HT2B (E9-5) - E1 (E7-1)
    HT1B (E8-1) - E1 (E7-1)    		 R - BR
    R - BR    		 Heated oxygen sensor heater operation signal Idling Below 3.0 V
    HT2B (E9-5) - E1 (E7-1)
    HT1B (E8-1) - E1 (E7-1)    		 R - BR
    R - BR    		 Heated oxygen sensor heater operation signal Ignition switch ON 9 to 14 V
    E05 (E9-6) - E1 (E7-1) W-B - BR Earth (ground) circuit of ECM Always Below 1 V
    E04 (E9-7) - E1 (E7-1) W-B - BR Earth (ground) circuit of ECM Always Below 1 V
    NSW (E9-8) - E1 (E7-1) W-R - BR Park/Neutral position switch signal Ignition switch ON, Shift lever position P or N Below 3.0 V
    NSW (E9-8) - E1 (E7-1) W-R - BR Park/Neutral position switch signal Ignition switch ON, Shift lever position other than P or N 9 to 14 V
    EKN2 (E9-20) - KNK2 (E9-21) G - R Earth (ground) circuit of knock sensor With engine speed at 4,000 rpm after warming up Pulse generation
    (see waveform 4)
    KNK2 (E9-21) - EKN2 (E9-20) R - G Knock sensor signal With engine speed at 4,000 rpm after warming up Pulse generation
    (see waveform 4)
    A1A+ (E9-22) - E1 (E7-1) BR - BR A/F sensor signal Ignition switch ON 3.3 V*1
    A2A+ (E9-23) - E1 (E7-1) P - BR A/F sensor signal Ignition switch ON 3.3 V*1
    EKNK (E9-28) - KNK1 (E9-29) W - B Earth (ground) circuit of knock sensor With engine speed at 4,000 rpm after warming up Pulse generation
    (see waveform 4)
    KNK1 (E9-29) - EKNK (E9-28) B - W Knock sensor signal With engine speed at 4,000 rpm after warming up Pulse generation
    (see waveform 4)
    A1A- (E9-30) - E1 (E7-1) Y - BR A/F sensor Ignition switch ON 3.0 V*1
    A2A- (E9-31) - E1 (E7-1) L - BR A/F sensor Ignition switch ON 3.0 V*1

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

    *2 : with Dynamic Laser Cruise Control

    1. WAVEFORM 1
      Fig 2: Identifying Waveform 1
      GTY133976Courtesy 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 msec./DIV.
        Conditions Idling

        HINT: 

        The wavelength becomes shorter as the engine rpm increases.

    2. WAVEFORM 2
      Fig 3: Identifying Waveform 2
      GTY136928Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Heated oxygen sensor signal
        ECM Terminal Names Between OX1B and E2, or OX2B and E2
        Tester Ranges 0.2 V/DIV., 200 msec./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.

    3. WAVEFORM 3
      Fig 4: Identifying Waveform 3
      GTY142776Courtesy 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 msec./DIV.
        Conditions Idling

        HINT: 

        The wavelength becomes shorter as the engine rpm increases.

    4. WAVEFORM 4
      Fig 5: Identifying Waveform 4
      GTY145057Courtesy 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 msec./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.
    5. WAVEFORM 5
      Fig 6: Identifying Waveform 5
      GTY134782Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Variable Valve Timing (VVT) sensor signal (1)
      2. Crankshaft position sensor signal (2)
        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 msec./DIV.
        Conditions Idling

        HINT: 

        The wavelength becomes shorter as the engine rpm increases.

    6. WAVEFORM 6
      Fig 7: Identifying Waveform 6
      GTY139231Courtesy 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 msec./DIV.
        Conditions Idling

        HINT: 

        The wavelength becomes shorter as the engine rpm increases.

    7. WAVEFORM 7
      Fig 8: Identifying Waveform 7
      GTY141905Courtesy 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 msec./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.

    8. WAVEFORM 8
      Fig 9: Identifying Waveform 8
      GTY102801Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Vehicle speed signal
        ECM Terminal Names Between SPD and E1
        Tester Ranges 2 V/DIV., 20 msec./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.
    9. WAVEFORM 9
      Fig 10: Identifying Waveform 9
      GTY141308Courtesy 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 msec./DIV.
        Conditions Idling with warm engine

        HINT: 

        The duty ratio varies depending on the throttle actuator operation.

    10. WAVEFORM 10
      Fig 11: Identifying Waveform 10
      GTY135966Courtesy 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 msec./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
      GTY139353Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Engine speed signal
        ECM Terminal Names Between TACH and E1
        Tester Ranges 5 V/DIV., 10 msec./DIV.
        Conditions Idling

        HINT: 

        The wavelength becomes shorter as the engine rpm increases.

scientia non olet · About LEMON Manuals