СИСТЕМА SFI КОНТАКТЫ ECM

A001BWYE02

Tech Tips

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. (Symbols) Wiring Color Terminal Description Condition Specified Condition
A14-7 (BATT) - E3-1 (E1) B - W-B Battery (for measuring battery voltage and for ECM memory) Always 11 to 14 V
E1-1 (+BM) - E3-1 (E1) L - W-B Power source of throttle actuator Always 11 to 14 V
A14-8 (IGSW) - E3-1 (E1) R - W-B Engine switch Engine switch on (IG) 11 to 14 V
A13-2 (+B) - E3-1 (E1) B - W-B Power source of ECM Engine switch on (IG) 11 to 14 V
A13-1 (+B2) - E3-1 (E1) B - W-B Power source of ECM Engine switch on (IG) 11 to 14 V
E2-4 (OE1+) - E2-3 (OE1-) R - L-W Camshaft timing oil control valve (OCV) (exhaust side for bank 1) Idling

Pulse generation

(see waveform 1)
E4-18 (OE2+) - E4-28 (OE2-) B-W - Y-B Camshaft timing oil control valve (OCV) (exhaust side for bank 2) Idling

Pulse generation

(see waveform 1)
A14-3 (MREL) - E3-1 (E1) P - W-B EFI relay (EFI MAIN, EFI MAIN2) Engine switch on (IG) 11 to 14 V
E1-18 (VC) - E1-28 (E2) L - BR Power source for sensor (specific voltage) Engine switch on (IG) 4.5 to 5.0 V
E1-25 (VG) - E1-24 (E2G) B-R - B-W Mass air flow meter (for bank 1) Idling, Shift position in P or N, A/C switch OFF 0.5 to 3.0 V
E1-23 (VG2) - E1-32 (E2G2) B-R - B-W Mass air flow meter (for bank 2) Idling, Shift lever position P or N, A/C switch OFF 0.5 to 3.0 V
E1-22 (THA) - E1-28 (E2) B-L - BR Intake air temperature sensor (for bank 1) Idling, Intake air temperature (bank 1) 0 to 80°C (32 to 176°F) 0.5 to 3.4 V
E1-21 (THA2) - E1-28 (E2) B-L - BR Intake air temperature sensor (for bank 2) Idling, Intake air temperature (bank 2) 0 to 80°C (32 to 176°F) 0.5 to 3.4 V
E1-19 (THW) - E1-28 (E2) R-L - BR Engine coolant temperature sensor Idling, Engine coolant temperature 60 to 80°C (140 to 176°F) 0.2 to 1.0 V
E2-34 (VCTA) - E2-35 (ETA) R - W

Power source for throttle position sensor

(specific voltage)

 Engine switch on (IG) 4.5 to 5.0 V
E2-26 (VTA) - E2-35 (ETA) G - W Throttle position sensor (for engine control) Engine switch on (IG), Throttle valve fully closed 0.5 to 1.2 V
Engine switch on (IG), Throttle valve fully open 3.2 to 4.8 V
E2-27 (VTA2) - E2-35 (ETA) Y - W Throttle position sensor (for sensor malfunction detection)

Engine switch on (IG),

Accelerator pedal released

 2.1 to 3.1 V
Engine switch on (IG), Accelerator pedal released 4.5 to 5.0 V
A14-29 (VPA) - A14-20 (EPA) R - BR Accelerator pedal position sensor (for engine control) Engine switch on (IG), Accelerator pedal released 0.5 to 1.1 V
Engine switch on (IG), Accelerator pedal depressed 2.6 to 4.5 V
A14-28 (VPA2) - A14-21 (EPA2) R - BR Accelerator pedal position sensor (for sensor malfunctioning detection) Engine switch on (IG), Accelerator pedal released 1.2 to 2.0 V
Engine switch on (IG), Accelerator pedal depressed 3.4 to 4.75 V
A14-23 (VCPA) - A14-20 (EPA) L - BR Power source of accelerator pedal position sensor (for VPA) Engine switch on (IG) 4.5 to 5.0 V
A14-22 (VCP2) - A14-21 (EPA2) O - BR Power source of accelerator pedal position sensor (for VPA2) Engine switch on (IG) 4.5 to 5.0 V

E3-3 (HT1A) - A13-5 (E03)

E3-2 (HT2A) - A13-5 (E03)

R - W-B

R - W-B

 Front oxygen sensor heater Engine switch on (IG) 11 to 14 V
Idling

Pulse generation

(see waveform 2)
E3-28 (OX1A) - E1-28 (E2) B - BR Front oxygen sensor Engine switch on (IG) 0.1 to 0.9 V
E3-27 (OX2A) - E1-28 (E2) B - BR Front oxygen sensor Engine switch on (IG) 0.1 to 0.9 V

A13-4 (HT1B) - A13-5 (E03)

A13-3 (HT2B) - A13-5 (E03)

B - W-B

GR - W-B

 Rear heated oxygen sensor heater Engine switch on (IG) 11 to 14 V
Idling Below 3.0 V

A13-26 (OX1B) - E1-28 (E2)

A13-27 (OX2B) - E1-28 (E2)

G - BR

W - BR

 Rear heated oxygen sensor Maintain engine speed at 2500 rpm for 2 minutes after warming up sensor

Pulse generation

(see waveform 3)

E4-17 (#10) - E3-1 (E1)

E2-11 (#20) - E3-1 (E1)

E4-16 (#30) - E3-1 (E1)

E2-10 (#40) - E3-1 (E1)

E4-15 (#50) - E3-1 (E1)

E2-9 (#60) - E3-1 (E1)

E4-14 (#70) - E3-1 (E1)

E2-8 (#80) - E3-1 (E1)

G - W-B

B - W-B

GR - W-B

W - W-B

L - W-B

Y - W-B

V - W-B

R - W-B

 Injector for port injection Engine switch on (IG) 11 to 14 V
Idling

Pulse generation

(see waveform 4)
E3-26 (KNK1) - E3-33 (EKNK) W - B Knock sensor (for bank 1 sensor 1) Maintain engine speed at 4000 rpm after warming up

Pulse generation

(see waveform 5)
E3-25 (KNK2) - E3-32 (EKN2) G - R Knock sensor (for bank 2 sensor 1) Maintain engine speed at 4000 rpm after warming up

Pulse generation

(see waveform 5)
E3-24 (KNK3) - E3-31 (EKN3) W - B Knock sensor (for bank 1 sensor 2) Maintain engine speed at 4000 rpm after warming up

Pulse generation

(see waveform 5)
E3-23 (KNK4) - E3-30 (EKN4) G - R Knock sensor (for bank 2 sensor 2) Maintain engine speed at 4000 rpm after warming up

Pulse generation

(see waveform 5)
E2-25 (VV1+) - E2-33 (VV1-) Y - R Variable valve timing (VVT) sensor (intake side for bank 1) Idling

Pulse generation

(see waveform 6)
E4-19 (VV2+) - E4-29 (VV2-) R - W Variable valve timing (VVT) sensor (intake side for bank 2) Idling

Pulse generation

(see waveform 6)
E1-26 (EV1+) - E1-33 (EV1-) LG - L-Y Variable valve timing (VVT) sensor (exhaust side for bank 1) Idling

Pulse generation

(see waveform 7)
E3-22 (EV2+) - E3-29 (EV2-) B - BR Variable valve timing (VVT) sensor (exhaust side for bank 2) Idling

Pulse generation

(see waveform 7)
E2-24 (G2+) - E2-32 (G2-) Y - R Camshaft position sensor Idling

Pulse generation

(see waveform 8)
E1-27 (NE+) - E1-34 (NE-) W - P Crankshaft position sensor Idling

Pulse generation

(see waveform 8)

E4-27 (IGT1) - E3-1 (E1)

E2-23 (IGT2) - E3-1 (E1)

E4-26 (IGT3) - E3-1 (E1)

E2-22 (IGT4) - E3-1 (E1)

E4-25 (IGT5) - E3-1 (E1)

E2-21 (IGT6) - E3-1 (E1)

E4-24 (IGT7) - E3-1 (E1)

E2-20 (IGT8) - E3-1 (E1)

G-B - W-B

L-W - W-B

L-Y - W-B

LG - W-B

R - W-B

R-L - W-B

P-L - W-B

B-W - W-B

 Ignition coil (ignition signal) Idling

Pulse generation

(see waveform 9)

E4-32 (IGF1) - E3-1 (E1)

E2-28 (IGF2) - E3-1 (E1)

LG - W-B

G-B - W-B

 Ignition coil (ignition confirmation signal) Engine switch on (IG) 4.5 to 5.0 V
Idling

Pulse generation

(see waveform 9)
E1-17 (PRG) - E3-1 (E1) W-B - W-B Purge VSV Engine switch on (IG) 11 to 14 V
Idling

Pulse generation

(see waveform 10)
A14-24 (SPD) - E3-1 (E1) V - W-B Speed signal from combination meter Engine switch on (IG), Rotate driving wheel slowly

Pulse generation

(see waveform 11)
A13-20 (STA) - E3-1 (E1) Y - W-B STARTER relay (ST/IGCT) operation signal Cranking 11 to 14 V
A14-2 (STAR) - E3-1 (E1) BR - W-B STARTER relay (ST/IGCT) drive signal Engine switch on (IG), Shift position other than P or N 11 to 14 V
Cranking, Shift position in P or N 0 to 3.0 V
A14-27 (STSW) - E3-1 (E1) B - W-B Engine cranking required signal Cranking, Shift position in P or N 6.0 V or more
A14-13 (STP) - E3-1 (E1) L - W-B Stop light switch Brake pedal depressed 7.5 to 14 V
Brake pedal released Below 1.5 V
A14-12 (ST1-) - E3-1 (E1) V - W-B

Stop light switch

(opposite to STP terminal)

 Engine switch on (IG), Brake pedal depressed Below 1.5 V
Engine switch on (IG), Brake pedal released 7.5 to 14 V
E2-7 (M+) - E2-5 (ME01) W - W-B Throttle actuator Idling with warm engine

Pulse generation

(see waveform 12)
E2-6 (M-) - E2-5 (ME01) B - W-B Throttle actuator Idling with warm engine

Pulse generation

(see waveform 13)
A14-5 (FC) - E3-1 (E1) G - W-B CIRCUIT OPENING relay (C/OPN) Engine switch on (IG) 11 to 14 V
Idling 0 to 3.0 V
A14-6 (FPR) - E3-1 (E1) Y - W-B FUEL PUMP relay (F/PMP) Engine switch on (IG) 11 to 14 V
A14-11 (W) - E3-1 (E1) Y - W-B MIL Engine switch on (IG) Below 3.0 V
Idling 0 to 14 V
A13-21 (TC) - E3-1 (E1) P - W-B Terminal TC of DLC3 Engine switch on (IG) 11 to 14 V
A14-15 (TACH) - E3-1 (E1) R - W-B Engine speed Idling

Pulse generation

(see waveform 14)
A13-14 (CANH) - E3-1 (E1) R - W-B CAN communication line Engine switch on (IG)

Pulse generation

(see waveform 15)
A13-13 (CANL) - E3-1 (E1) G - W-B CAN communication line Engine switch on (IG)

Pulse generation

(see waveform 16)
E2-18 (ALT) - E3-1 (E1) L-R - W-B Generator M terminal Engine switch on (IG) 11 to 14 V
E2-17 (RLO) - E3-1 (E1) G - W-B Recharging control Idling

Pulse generation

(see waveform 17)
E4-7 (ASM+) - E4-6 (ASM-) L - P Intake air control valve actuator Warm engine and 3,000 rpm

Pulse generation

(see waveform 18)
A13-7 (SFTD) - E3-1 (E1) L - W-B Down-shift position switch signal Engine switch on (IG) and shift lever on S 11 to 14 V
Engine switch on (IG) and shift lever "-" position (down-shift) Below 1 V
A13-8 (SFTU) - E3-1 (E1) Y - W-B Up-shift position switch signal Engine switch on (IG) and shift lever on S 11 to 14 V
Engine switch on (IG) and shift lever "+" position (up-shift) Below 1 V
A13-16 (S) - E3-1 (E1) G - W-B S shift position switch signal Engine switch on (IG) and shift lever on S 11 to 14 V
Engine switch on (IG) and shift lever not on S Below 1 V
A13-9 (CAN-) - E3-1 (E1) W - W-B Communication signal with TCM Engine switch on (IG) Pulse generation
A13-10 (CAN+) - E3-1 (E1) B - W-B Communication signal with TCM Engine switch on (IG) Pulse generation
A13-19 (ACCR) - E3-1 (E1) G - W-B D-ACC relay cut signal Engine switch on (IG) → Cranking 11 to 14 V → Below 1 V
A13-29 (NSW) - E3-1 (E1) L - W-B Park/Neutral position switch Engine switch on (IG), shift position in P or N Below 3.0 V
Engine switch on (IG), Shift position except P or N 11 to 14 V
E3-11 (R) - E3-1 (E1) G - W-B Park/Neutral position switch signal Engine switch on (IG) and Shift lever on R 11 to 14 V
Engine switch on (IG) and Shift lever not on R Below 1 V
E3-12 (P) - E3-1 (E1) W - W-B Park/Neutral position switch signal Engine switch on (IG) and Shift lever on P 11 to 14 V
Engine switch on (IG) and Shift lever not on P Below 1 V
E3-13 (N) - E3-1 (E1) G-R - W-B Park/Neutral position switch signal Engine switch on (IG) and Shift lever on N 11 to 14 V
Engine switch on (IG) and Shift lever not on N Below 1 V
E3-14 (D) - E3-1 (E1) G-Y - W-B Park/Neutral position switch signal Engine switch on (IG) and Shift lever on D 11 to 14 V
Engine switch on (IG) and Shift lever not on D Below 1 V
E4-9 (EMD1) - E3-1 (E1) W - W-B Camshaft timing control motor signal Idling

Pulse generation

(see waveform 19)
E2-31 (EMD2) - E3-1 (E1) W-R - W-B Camshaft timing control motor signal Idling

Pulse generation

(see waveform 19)
E4-30 (EMR1) - E3-1 (E1) Y - W-B Camshaft timing control motor signal Idling

Pulse generation

(see waveform 20)
E2-29 (EMR2) - E3-1 (E1) Y-B - W-B Camshaft timing control motor signal Idling

Pulse generation

(see waveform 20)
E4-8 (EDT1) - E3-1 (E1) R - W-B Camshaft timing control motor signal Idling

Pulse generation

(see waveform 21)
E2-16 (EDT2) - E3-1 (E1) G-R - W-B Camshaft timing control motor signal Idling

Pulse generation

(see waveform 21)
E4-31 (EMF1) - E3-1 (E1) G - W-B Camshaft timing control motor signal Idling 0.3 to 1.3 V
E2-30 (EMF2) - E3-1 (E1) G-W - W-B Camshaft timing control motor signal Idling 0.3 to 1.3 V

  1. WAVEFORM 1

    A0019NGE02
    *a 5 V/DIV.
    *b 1 msec./DIV.
    Camshaft timing oil control valve (OCV) (Exhaust side):
    ECM Terminal Name Between OE1+ and OE1- or OE2+ and OE2-
    Tester Range 5 V/DIV., 1 msec./DIV.
    Condition Idling with warm engine

  2. WAVEFORM 2

    A001BTPE01
    *a 5 V/DIV.
    *b 10 msec./DIV.
    Front oxygen sensor heater:
    ECM Terminal Name

    CH1: Between HT1A and E03

    CH2: Between HT2A and E03
    Tester Range 5 V/DIV., 10 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The wavelength becomes shorter as the engine rpm increases.

  3. WAVEFORM 3

    A001BLDE02
    *1 0.2 V/DIV.
    *2 200 msec./DIV.
    Heated oxygen sensor:
    ECM Terminal Name Between OX1B and E2 or OX2B and E2
    Tester Range 0.2 V/DIV., 200 msec./DIV.
    Condition Engine speed maintained at 2500 rpm for 2 minutes after warming up

    Tech Tips

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

  4. WAVEFORM 4

    A001ENQE01
    *a 5 V/DIV.
    *b 5 msec./DIV.
    Injector No. 1 (to No. 8) injection signal:
    ECM Terminal Name Between #10 (to #80) and E1
    Tester Range 5 V/DIV., 5 msec./DIV.
    Condition Idling

    Tech Tips

    The wavelength becomes shorter as the engine rpm increases.

  5. WAVEFORM 5

    A001DTJE06
    *a 1 V/DIV.
    *b 1 msec./DIV.
    Knock sensor:
    ECM Terminal Name

    Between KNK1 and EKNK

    Between KNK2 and EKN2

    Between KNK3 and EKN3

    Between KNK4 and EKN4
    Tester Range 0.01 to 10 V/DIV., 0.01 to 10 msec./DIV.
    Condition Engine speed maintained at 4000 rpm after warming up engine

    Tech Tips


    • The wavelength becomes shorter as the engine rpm increases.

    • The waveforms and amplitudes displayed differ slightly depending on the vehicle.

  6. WAVEFORM 6

    A001E2FE01
    Crankshaft position sensor and VVT sensor for intake side:
    ECM Terminal Name

    (a) Between NE+ and NE-

    (b) Between VV1+ and VV1-

    (c) Between VV2+ and VV2-
    Tester Range 5 V/DIV., 20 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The wavelength becomes shorter as the engine rpm increases.

  7. WAVEFORM 7

    A001BPME01
    Crankshaft position sensor and VVT sensor for exhaust side:
    ECM Terminal Name

    (a) Between NE+ and NE-

    (b) Between EV1+ and EV1-

    (c) Between EV2+ and EV2-
    Tester Range 5 V/DIV., 20 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The wavelength becomes shorter as the engine rpm increases.

  8. WAVEFORM 8

    A001BHOE01
    *a 5 V/DIV.
    *b 20 msec./DIV.
    Crankshaft position sensor and camshaft position sensor:
    ECM Terminal Name

    CH1: Between NE+ and NE-

    CH2: Between G2+ and G2-
    Tester Range 5 V/DIV., 20 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The wavelength becomes shorter as the engine rpm increases.

  9. WAVEFORM 9

    A001AL9E01
    *a IGT and IGF Signal Waveform
    *b 2 V/DIV.
    *c 20 msec./DIV.
    Igniter IGT signal (from ECM to igniter) and Igniter IGF signal (from igniter to ECM):
    ECM Terminal Name

    CH1: Between IGT (1 to 8) and E1

    CH2: Between IGF1 and E1 or IGF2 and E1
    Tester Range 2 V/DIV., 20 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The wavelength becomes shorter as the engine rpm increases.

  10. WAVEFORM 10

    A0019ITE01
    *1 10 V/DIV.
    *2 20 msec./DIV.
    Purge VSV:
    ECM Terminal Name Between PRG and E1
    Tester Range 10 V/DIV., 20 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    If the waveform is not similar to the illustration, check the waveform again after idling for 10 minutes or more.

  11. WAVEFORM 11

    A001F9OE03
    *a 2 V/DIV.
    *b 20 msec./DIV.
    Vehicle speed signal:
    ECM Terminal Name Between SPD and E1
    Tester Range 2 V/DIV., 20 msec./DIV.
    Condition Driving at 12 mph (20 km/h)

    Tech Tips

    The wavelength becomes shorter as the vehicle speed increases.

  12. WAVEFORM 12

    A001EHSE06
    *a 5 V/DIV.
    *b 1 msec./DIV.
    Throttle actuator positive terminal:
    ECM Terminal Name Between M+ and ME01
    Tester Range 5 V/DIV., 1 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The duty ratio varies depending on the throttle actuator operation.

  13. WAVEFORM 13

    A001APVE04
    *a 5 V/DIV.
    *b 1 msec./DIV.
    Throttle actuator negative terminal:
    ECM Terminal Name Between M- and ME01
    Tester Range 5 V/DIV., 1 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The duty ratio varies depending on the throttle actuator operation.

  14. WAVEFORM 14

    A001CWFE04
    *a 5 V/DIV.
    *b 10 msec./DIV.
    Engine speed signal:
    ECM Terminal Name Between TACH and E1
    Tester Range 5 V/DIV., 10 msec./DIV.
    Condition Idling

    Tech Tips

    The wavelength becomes shorter as the engine rpm increases.

  15. WAVEFORM 15

    A001AWTE07
    *a 1 V/DIV.
    *b 10 μsec./DIV.
    CAN communication signal:
    ECM Terminal Name Between CANH and E1
    Tester Range 1 V/DIV., 10 μsec./DIV.
    Condition Stop engine and Engine switch on (IG)

    Tech Tips

    The waveform varies depending on the CAN communication signal.

  16. WAVEFORM 16

    A001FYAE02
    *a 1 V/DIV.
    *b 10 μsec./DIV.
    CAN communication signal:
    ECM Terminal Name Between CANL and E1
    Tester Range 1 V/DIV., 10 μsec./DIV.
    Condition Stop engine and Engine switch on (IG)

    Tech Tips

    The waveform varies depending on the CAN communication signal.

  17. WAVEFORM 17

    A001EGOE03
    *a 2 V/DIV.
    *b 50 msec./DIV
    Recharging control signal
    ECM Terminal Name Between RLO and E1
    Tester Range 2 V/DIV., 50 msec./DIV.
    Condition Idling

  18. WAVEFORM 18

    A001CYZE01
    *a 5 V/DIV.
    *b 5 msec./DIV.
    Intake air control valve signal
    ECM Terminal Name Between ASM+ and ASM-
    Tester Range 5 V/DIV., 5 msec./DIV.
    Condition Warm engine and 3,000 rpm

  19. WAVEFORM 19

    A001CGCE08
    *a 2 V/DIV.
    *b 100 msec./DIV.
    Camshaft timing control motor EMD signal:
    ECM Terminal Name Between EMD1 and E1 or EMD2 and E1
    Tester Range 2 V/DIV., 100 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The wavelength becomes shorter as the engine rpm increases.

  20. WAVEFORM 20

    A001D2WE06
    *a 2 V/DIV.
    *b 5 msec./DIV.
    Camshaft timing control motor EMR signal:
    ECM Terminal Name Between EMR1 and E1 or EMR2 and E1
    Tester Range 2 V/DIV., 5 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The wavelength becomes shorter as the engine rpm increases.

  21. WAVEFORM 21

    A001CN9E06
    *a 1 V/DIV.
    *b 5 msec./DIV.
    Camshaft timing control motor EDT signal:
    ECM Terminal Name Between EDT1 and E1 or EDT2 and E1
    Tester Range 1 V/DIV., 5 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The wavelength becomes shorter as the engine rpm increases.