SFI SYSTEM TERMINALS OF ECM
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) | Y-B - W-B | Power source of throttle actuator | Always | 11 to 14 V |
| A14-8 (IGSW) - E3-1 (E1) | R - W-B | Power switch | Power switch on (IG) | 11 to 14 V |
| A13-2 (+B) - E3-1 (E1) | B - W-B | Power source of ECM | Power switch on (IG) | 11 to 14 V |
| A13-1 (+B2) - E3-1 (E1) | B - W-B | Power source of ECM | Power switch on (IG) | 11 to 14 V |
| E2-4 (OE1+) - E2-3 (OE1-) | R - L-W | Camshaft oil control valve (OCV) (for bank 1) | Idling | Pulse generation (see waveform 1) |
| E4-18 (OE2+) - E4-28 (OE2-) | B-W - Y-B | Camshaft oil control valve (OCV) (for bank 2) | Idling | Pulse generation (see waveform 1) |
| A14-3 (MREL) - E3-1 (E1) | P - W-B | EFI Relay (EFI MAIN, EFI MAIN2) | Power switch on (IG) | 10 to 14 V |
| E1-18 (VC) - E1-28 (E2) | L - BR | Power source for sensor (specific voltage) | Power 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 3.5 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 3.5 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) |
Power switch on (IG) | 4.5 to 5.0 V |
| E2-26 (VTA1) - E2-35 (ETA) | G - W | Throttle position sensor (for engine control) | Idling, Accelerator pedal released | 0.5 to 1.2 V |
| 2500 rpm (Accelerator pedal fully depressed) | 0.6 to 1.2 V | |||
| E2-27 (VTA2) - E2-35 (ETA) | Y - W | Throttle position sensor (for sensor malfunction detection) | Idling, Accelerator pedal released | 2.1 to 3.1 V |
| 2500 rpm (Accelerator pedal fully depressed) | 2.2 to 3.2 V | |||
| E3-5 (HA1A) - E3-4 (E04) | B-R - W-B | A/F sensor heater (for bank 1 sensor 1) | Power switch on (IG) | 11 to 14 V |
| Idling | Pulse generation (see waveform 2) |
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| E3-6 (HA2A) - E4-1 (E05) | B-R - W-B | A/F sensor heater (for bank 2 sensor 1) | Power switch on (IG) | 11 to 14 V |
| Idling | Pulse generation (see waveform 2) |
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| E4-23 (A1A+) - E3-1 (E1) | R - W-B | A/F sensor (for bank 1 sensor 1) | Power switch on (IG) | 3.3 V*1 |
| E4-21 (A2A+) - E3-1 (E1) | B - W-B | A/F sensor (for bank 2 sensor 1) | Power switch on (IG) | 3.3 V*1 |
| E4-22 (A1A-) - E3-1 (E1) | G - W-B | A/F sensor (for bank 1 sensor 1) | Power switch on (IG) | 3.0 V*1 |
| E4-20 (A2A-) - E3-1 (E1) | W - W-B | A/F sensor (for bank 2 sensor 1) | Power switch on (IG) | 3.0 V*1 |
| A13-4 (HT1B) - A13-5 (E03) | R - W-B | Heated oxygen sensor heater (for bank 1 sensor 2) | Power switch on (IG) | 11 to 14 V |
| Idling | Below 3.0 V | |||
| A13-3 (HT2B) - A13-5 (E03) | GR - W-B | Heated oxygen sensor heater (for bank 2 sensor 2) | Power switch on (IG) | 11 to 14 V |
| Idling | Below 3.0 V | |||
| A13-26 (OX1B) - E1-28 (E2) | G - BR | Heated oxygen sensor (for bank 1 sensor 2) | Maintain engine speed at 2500 rpm for 2 minutes after warming up sensor | Pulse generation (see waveform 3) |
| A13-27 (OX2B) - E1-28 (E2) | W - BR | Heated oxygen sensor (for bank 2 sensor 2) | Maintain engine speed at 2500 rpm for 2 minutes after warming up sensor | Pulse generation (see waveform 3) |
| E4-17 (#10) - E3-1 (E1) | G - W-B | Fuel injector (for port injection) | Power switch on (IG) | 11 to 14 V |
| E2-11 (#20) - E3-1 (E1) | B - W-B | |||
| E4-16 (#30) - E3-1 (E1) | GR - W-B | |||
| E2-10 (#40) - E3-1 (E1) | W - W-B | |||
| E4-15 (#50) - E3-1 (E1) | L - W-B | Idling | Pulse generation (see waveform 4) |
|
| E2-9 (#60) - E3-1 (E1) | Y - W-B | |||
| E4-14 (#70) - E3-1 (E1) | V - W-B | |||
| E2-8 (#80) - E3-1 (E1) | R - W-B | |||
| E3-20 (#1) - E3-1 (E1) | G-W - W-B | Fuel injector (for direct injection) | Power switch on (IG) | 0 to 5 V |
| E3-10 (#2) - E3-1 (E1) | L - W-B | |||
| E3-9 (#3) - E3-1 (E1) | G-Y - W-B | |||
| E3-19 (#4) - E3-1 (E1) | W-R - W-B | |||
| E3-8 (#5) - E3-1 (E1) | G - W-B | Idling | Pulse generation (see waveform 5) |
|
| E3-18 (#6) - E3-1 (E1) | LG - W-B | |||
| E3-17 (#7) - E3-1 (E1) | P - W-B | |||
| E3-7 (#8) - E3-1 (E1) | Y-B - W-B | |||
| E2-13 (INJ1) - E3-1 (E1) | P-L - W-B | Fuel injector (for direct injection) confirmation signal | Idling | Pulse generation (see waveform 5) |
| E2-12 (INJ2) - E3-1 (E1) | L - W-B | |||
| E2-15 (INJ3) - E3-1 (E1) | P - W-B | Fuel injector (for direct injection) confirmation signal | Idling | Pulse generation (see waveform 5) |
| E2-14 (INJ4) - E3-1 (E1) | LG - W-B | |||
| E3-26 (KNK1) - E3-33 (EKNK) | W - B | Knock sensor (for bank 1 sensor 1) | Maintain engine speed at 2500 rpm after warming up | Pulse generation (see waveform 6) |
| E3-25 (KNK2) - E3-32 (EKN2) | G - R | Knock sensor (for bank 2 sensor 1) | Maintain engine speed at 2500 rpm after warming up | Pulse generation (see waveform 6) |
| E3-24 (KNK3) - E3-31 (EKN3) | W - B | Knock sensor (for bank 1 sensor 2) | Maintain engine speed at 2500 rpm after warming up | Pulse generation (see waveform 6) |
| E3-23 (KNK4) - E3-30 (EKN4) | G - R | Knock sensor (for bank 2 sensor 2) | Maintain engine speed at 2500 rpm after warming up | Pulse generation (see waveform 6) |
| E2-25 (VV1+) - E2-33 (VV1-) | Y - R | Variable valve timing (VVT) sensor (for intake side of bank 1) | Idling | Pulse generation (see waveform 7) |
| E4-19 (VV2+) - E4-29 (VV2-) | R - W | Variable valve timing (VVT) sensor (for intake side of bank 2) | Idling | Pulse generation (see waveform 7) |
| E1-26 (EV1+) - E1-33 (EV1-) | LG - L-Y | Variable valve timing (VVT) sensor (for exhaust side of bank 1) | Idling | Pulse generation (see waveform 8) |
| E3-22 (EV2+) - E3-29 (EV2-) | B - Y-R | Variable valve timing (VVT) sensor (for exhaust side of bank 2) | Idling | Pulse generation (see waveform 8) |
| E2-24 (G2+) - E2-32 (G2-) | Y - R | Camshaft position sensor | Idling | Pulse generation (see waveform 9) |
| E1-27 (NE+) - E1-34 (NE-) | W - B | Crankshaft position sensor | Idling | Pulse generation (see waveform 7, 8, 9) |
| E4-27 (IGT1) - E3-1 (E1) | G-B - W-B | Ignition coil (ignition signal) | Idling | Pulse generation (see waveform 10) |
| E2-23 (IGT2) - E3-1 (E1) | L-W - W-B | |||
| E4-26 (IGT3) - E3-1 (E1) | L-Y - W-B | |||
| E2-22 (IGT4) - E3-1 (E1) | LG - W-B | |||
| E4-25 (IGT5) - E3-1 (E1) | R - W-B | |||
| E2-21 (IGT6) - E3-1 (E1) | R-L - W-B | |||
| E4-24 (IGT7) - E3-1 (E1) | P-L - W-B | |||
| E2-20 (IGT8) - E3-1 (E1) | B-W - W-B | |||
| E4-32 (IGF1) - E3-1 (E1) | LG - W-B | Ignition coil (ignition confirmation signal) | Power switch on (IG) | 4.5 to 5.0 V |
| E2-28 (IGF2) - E3-1 (E1) | G-B - W-B | Idling | Pulse generation (see waveform 10) |
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| E1-17 (PRG) - E3-1 (E1) | R-Y - W-B | Purge VSV | Power switch on (IG) | 10 to 14 V |
| Idling | Pulse generation (see waveform 11) |
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| E2-7 (M+) - E2-6 (M-) | W - B | Throttle actuator | Idling with warm engine | Pulse generation (see waveform 12) |
| A14-5 (FC) - E3-1 (E1) | G - W-B | Circuit opening (C/OPN) relay | Power switch on (IG) | 11 to 14 V |
| Idling | 0 to 3.0 V | |||
| A14-6 (FPR) - E3-1 (E1) | Y - W-B | Fuel pump (F/PMP) relay | Power switch on (IG) | 11 to 14 V |
| A14-11 (W) - E3-1 (E1) | Y - W-B | MIL | Power 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 | Power switch on (IG) | 11 to 14 V |
| A14-15 (TACH) - E3-1 (E1) | BR - W-B | Engine speed | Idling | Pulse generation (see waveform 13) |
| E4-10 (FPF1) - E3-1 (E1) | V - W-B | Fuel pump (for high pressure of bank 1) (Spill control valve) |
Idling | Pulse generation (see waveform 14) |
| E4-11 (FPD) - E3-1 (E1) | R-L - W-B | Fuel pump (for high pressure of bank 1) (Spill control valve) |
Idling | Pulse generation (see waveform 14) |
| E4-12 (FPF2) - E3-1 (E1) | GR - W-B | Fuel pump (for high pressure of bank 2) (Spill control valve) |
Idling | Pulse generation (see waveform 15) |
| E4-13 (FPD2) - E3-1 (E1) | L-Y - W-B | Fuel pump (for high pressure of bank 2) (Spill control valve) |
Idling | Pulse generation (see waveform 15) |
| E3-27 (PR) - E1-28 (E2) | L-Y - BR | Fuel pressure sensor | Idling | 1.8 to 2.3 V |
| A13-14 (CANH) - E3-1 (E1) | B - W-B | CAN communication line | Power switch on (IG) | Pulse generation (see waveform 16) |
| A13-10 (CAN+) - E3-1 (E1) | B - W-B | |||
| A13-12 (CA1H) - E3-1 (E1) | B - W-B*2 Y - W-B*3 |
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| A13-18 (CA2H) - E3-1 (E1) | R - W-B | |||
| A13-13 (CANL) - E3-1 (E1) | W - W-B | CAN communication line | Power switch on (IG) | Pulse generation (see waveform 17) |
| A13-9 (CAN-) - E3-1 (E1) | W - W-B | |||
| A13-11 (CA1L) - E3-1 (E1) | W - W-B*2 L - W-B*3 |
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| A13-17 (CA2L) - E3-1 (E1) | G - W-B | |||
| E4-7 (ASM+) - E4-6 (ASM-) | L - P | Intake air control valve actuator | When the engine is applied to high load | Pulse generation (see waveform 18) |
| A14-4 (IREL) - E3-1 (E1) | W - W-B | EDU1, EDU2 relay | Immediately after turning the power switch off to on (IG) | 11 to 14 V |
| E4-9 (EMD1) - E3-1 (E1) | W - W-B | Camshaft timing control motor signal (for bank 1) | Idling | Pulse generation (see waveform 19) |
| E2-31 (EMD2) - E3-1 (E1) | W-R - W-B | Camshaft timing control motor signal (for bank 2) | Idling | Pulse generation (see waveform 19) |
| E4-30 (EMR1) - E3-1 (E1) | Y - W-B | Camshaft timing control motor signal (for bank 1) | Idling | Pulse generation (see waveform 20) |
| E2-29 (EMR2) - E3-1 (E1) | Y-B - W-B | Camshaft timing control motor signal (for bank 2) | Idling | Pulse generation (see waveform 20) |
| E4-8 (EDT1) - E3-1 (E1) | R - W-B | Camshaft timing control motor signal (for bank 1) | Idling | Pulse generation (see waveform 21) |
| E2-16 (EDT2) - E3-1 (E1) | G-R - W-B | Camshaft timing control motor signal (for bank 2) | Idling | Pulse generation (see waveform 21) |
| E4-31 (EMF1) - E3-1 (E1) | G - W-B | Camshaft timing control motor signal (for bank 1) | Idling | 0.3 to 1.3 V |
| E2-30 (EMF2) - E3-1 (E1) | G-W - W-B | Camshaft timing control motor signal (for bank 2) | Idling | 0.3 to 1.3 V |
| A13-28 (DSVR) - E3-1 (E1) | L - W-B | RELIEF VLV relay | RELIEF VLV relay OFF | 11 to 14 V |
| RELIEF VLV relay ON | 0 to 3.0 V | |||
| A14-25 (KSW) - E3-1 (E1) | P - W-B | Main body ECU | Power switch off → on | 3 to 5 V → 0 V |
| A14-19 (GO1) - E3-1 (E1) | B - W-B | Camshaft revolution signal | Idling | Pulse generation (see waveform 22) |
| A14-27 (NEO1) - E3-1 (E1) | G - W-B | Crankshaft revolution signal | Idling | Pulse generation (see waveform 22) |
Tech Tips
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*1: The ECM terminal voltage is constant regardless of the output voltage from the sensor.
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*2: w/ Active Stabilizer Suspension System
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*3: w/o Active Stabilizer Suspension System
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WAVEFORM 1
Camshaft oil control valve (OCV): ECM Terminal Name Between OE1+ and OE1- or OE2+ and OE2- Tester Range 5 V/DIV., 1 msec./DIV. Condition Idling with warm engine -
WAVEFORM 2
A/F sensor heater: ECM Terminal Name CH1: Between HA1A and E1
CH2: Between HA2A and E1
Tester Range 5 V/DIV., 10 msec./DIV. Condition Idling with warm engine Tech Tips
The wavelength becomes shorter as the engine rpm increases.
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WAVEFORM 3
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 B1 S2 and O2S B2 S2 shows the ECM input values from the heated oxygen sensor.
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WAVEFORM 4
Fuel injector (for Port Injection) No. 1 (to No. 8) injection signal: ECM Terminal Name Between #10 (to #80) and E1 Tester Range 20 V/DIV., 1 msec./DIV. Condition Idling and engine coolant temperature 60°C (140°F) or less Tech Tips
The wavelength becomes shorter as the engine rpm increases.
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WAVEFORM 5
Fuel Injector (for Direct Injection) No. 1 (to No. 8) injection signal and Injection confirmation signal: ECM Terminal Name CH1: Between #1 or #6 and E1
CH2: Between INJ1 and E1
CH1: Between #4 or #7 and E1
CH2: Between INJ2 and E1
CH1: Between #5 or #8 and E1
CH2: Between INJ3 and E1
CH1: Between #2 or #3 and E1
CH2: Between INJ4 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.
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WAVEFORM 6
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 2500 rpm after warming up engine Tech Tips
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The wavelength becomes shorter as the engine rpm increases.
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The waveforms and amplitudes displayed differ slightly depending on the vehicle.
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WAVEFORM 7
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.
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WAVEFORM 8
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.
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WAVEFORM 9
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.
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WAVEFORM 10
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.
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WAVEFORM 11
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.
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WAVEFORM 12
Throttle actuator negative terminal: ECM Terminal Name Between M+ and M- Tester Range 5 V/DIV., 500 μsec./DIV. Condition Idling with warm engine Tech Tips
The duty ratio varies depending on the throttle actuator operation.
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WAVEFORM 13
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.
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WAVEFORM 14
Fuel pump (for high pressure of bank 1) (spill control valve): ECM Terminal Name CH1: Between FPD and E1
CH2: Between FPF1 and E1
Tester Range 2 V/DIV., 5 msec./DIV. Condition Idling with warm engine -
WAVEFORM 15
Fuel pump (for high pressure of bank 2) (spill control valve): ECM Terminal Name CH1: Between FPD2 and E1
CH2: Between FPF2 and E1
Tester Range 2 V/DIV., 5 msec./DIV. Condition 1200 rpm with warm engine -
WAVEFORM 16
CAN communication signal: ECM Terminal Name Between CANH and E1
Between CAN+ and E1
Between CA1H and E1
Between CA2H and E1
Tester Range 1 V/DIV., 10 μsec./DIV. Condition Engine stopped and power switch on (IG) Tech Tips
The waveform varies depending on the CAN communication signal.
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WAVEFORM 17
CAN communication signal: ECM Terminal Name Between CANL and E1
Between CAN- and E1
Between CA1L and E1
Between CA2L and E1
Tester Range 1 V/DIV., 10 μsec./DIV. Condition Engine stopped and power switch on (IG) Tech Tips
The waveform varies depending on the CAN communication signal.
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WAVEFORM 18
Intake air control valve signal: ECM Terminal Name Between ASM+ and ASM- Tester Range 5 V/DIV., 5 msec./DIV. Condition When the engine is applied to high load -
WAVEFORM 19
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.
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WAVEFORM 20
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.
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WAVEFORM 21
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.
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WAVEFORM 22
Camshaft revolution signal from ECM to HV control ECU or MG ECU: ECM Terminal Name Between GO1 and E1 Tester Range 5 V/DIV., 20 msec./DIV. Condition Idling Tech Tips
The wavelength becomes shorter as the engine rpm increases.
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WAVEFORM 23
Crankshaft revolution signal from ECM to HV control ECU: ECM Terminal Name Between NEO1 and E1 Tester Range 5 V/DIV., 1 msec./DIV. Condition Idling Tech Tips
The wavelength becomes shorter as the engine rpm increases.