SFI SYSTEM TERMINALS OF ECM
Tech Tips
The standard voltage, resistance and waveform between each pair of the ECM terminals is shown in the table below. The appropriate conditions for checking each pair of the terminals is also indicated. The result of checks should be compared with the standard voltage, resistance and waveform for each pair of the terminals as displayed in the Specified Condition column. The illustration above can be used as a reference to identify the ECM terminal locations.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| A38-1 (BATT) - C62-53 (E1) | B - W-B | Battery (for measuring battery voltage and for ECM memory) | Always | 11 to 14 V |
| A38-2 (+B) - C62-53 (E1) | R - W-B | Power source of ECM | Ignition switch ON | 11 to 14 V |
| A38-3 (+B2) - C62-53 (E1) | R - W-B | Power source of ECM | Ignition switch ON | 11 to 14 V |
| A38-6 (IGSW) - C62-53 (E1) | BE - W-B | Ignition switch signal | Ignition switch ON | 11 to 14 V |
| A38-8 (IREL) - C62-53 (E1) | L - W-B | D INJ relay operation signal | Engine stopped, ignition switch ON | 0 to 1.5 V |
| A38-9 (STP) - C62-53 (E1) | R - W-B | Stop light switch assembly signal | Brake pedal depressed | 7.5 to 14 V |
| Brake pedal released | 0 to 1.5 V | |||
| A38-10 (ST1-) - C62-53 (E1) | G - W-B | Stop light switch assembly signal (opposite to STP terminal) | Ignition switch ON, brake pedal depressed | 0 to 1.5 V |
| Ignition switch ON, brake pedal released | 7.5 to 14 V | |||
| A38-11 (IWPI) - C62-53 (E1) | V - W-B | Electric water pump assembly signal | Electric water pump assembly operating | Pulse generation |
| A38-13 (CANH) - C62-53 (E1) | R - W-B | CAN communication signal | Engine stopped, ignition switch ON | Pulse generation (See waveform 1) |
| A38-21 (FPC) - C62-53 (E1) | LG - W-B | Fuel pump control signal | Engine stopped, ignition switch ON | Below 1.5 V |
| A38-24 (IWPO) - C62-53 (E1) | SB - W-B | Electric water pump assembly signal | Electric water pump assembly operating | Pulse generation |
| A38-26 (CANL) - C62-53 (E1) | P - W-B | CAN communication signal | Engine stopped, ignition switch ON | Pulse generation (See waveform 2) |
| A38-29 (STA) - C62-53 (E1) | LG - W-B | Starter operation signal | Cranking | 6.0 V or higher |
| A38-30 (NEO) - C62-53 (E1) | L - W-B | Engine speed signal sent to other ECUs | Idling with warm engine | Pulse generation (See waveform 3) |
| A38-31 (TACH) - C62-53 (E1) | W - W-B | Engine speed signal | Idling with warm engine | Pulse generation (See waveform 4) |
| A38-33 (TC) - C62-53 (E1) | G - W-B | Terminal TC of DLC3 | Engine stopped, ignition switch ON | 11 to 14 V |
| A38-36 (MTMS) - C62-53 (E1) | SB - W-B | iMT switch signal | Ignition switch ON and iMT switch pushed | Below 1.5 V |
| Ignition switch ON and iMT switch not pushed | 11 to 14 V | |||
| A38-44 (SPD) - C62-53 (E1) | V - W-B | Vehicle speed signal from combination meter assembly | Driving at 20 km/h (12 mph) | Pulse generation (See waveform 5) |
| A38-46 (MREL) - C62-53 (E1) | G - W-B | EFI-MAIN relay operation signal | Engine stopped, ignition switch ON | 11 to 14 V |
| A38-47 (VPA) - A38-48 (EPA) | R - L | Accelerator pedal position sensor signal (for engine control) | Ignition switch ON, accelerator pedal fully released | 0.5 to 1.1 V |
| Ignition switch ON, accelerator pedal fully depressed | 2.6 to 4.5 V | |||
| A38-49 (VCPA) - A38-48 (EPA) | Y - L | Power source of accelerator pedal position sensor (for VPA) | Engine stopped, ignition switch ON | 4.5 to 5.5 V |
| A38-50 (VPA2) - A38-51 (EPA2) | V - W | Accelerator pedal position sensor signal | Ignition switch ON, accelerator pedal fully released | 1.2 to 2.0 V |
| Ignition switch ON, accelerator pedal fully depressed | 3.4 to 4.75 V | |||
| A38-52 (VCP2) - A38-51 (EPA2) | G - W | Power source of accelerator pedal position sensor (for VPA2) | Engine stopped, ignition switch ON | 4.5 to 5.5 V |
| A38-57 (NSW) - C62-53 (E1) | W - W-B | Park/neutral position switch signal | Ignition switch ON, shift lever not in P or N | 11 to 14 V |
| Ignition switch ON, shift lever in P or N | Below 3.0 V | |||
| A38-58*2 (KSW) - C62-53 (E1) | GR - W-B | Key unlock warning switch input signal | Ignition switch off → ON | 0 to 3.0 V |
| A38-58*3 (KSW) - C62-53 (E1) | GR - W-B | Key unlock warning switch input signal | Key in ignition key cylinder | Below 1 V |
| No key in ignition key cylinder | 11 to 14 V or Pulse generation | |||
| A38-59 (S)*1 - C62-53 (E1) | W - W-B | M shift position switch signal | Ignition switch ON, shift lever in M | 11 to 14 V |
| Ignition switch ON, shift lever not in M | Below 1 V | |||
| A38-60 (RFC) - C62-53 (E1) | R - W-B | Cooling fan control signal | Ignition switch ON, A/C switch on (max cool) | Pulse generation (See waveform 6) |
| C62-9 (OC1+) - C62-8 (OC1-) | L - G | Cam timing oil control solenoid assembly (for intake camshaft) operation signal | Idling | Pulse generation (See waveform 7) |
| C62-16 (M+) - C62-49 (ME01) | V - W-B | Throttle actuator operation signal (positive terminal) | Idling with warm engine | Pulse generation (See waveform 8) |
| C62-17 (HT1B) - C62-53 (E1) | W - W-B | Heated oxygen sensor heater operation signal | Engine stopped, ignition switch ON | 11 to 14 V |
| Idling with cold engine | Below 3.0 V | |||
| C62-19 (HA1A) - C62-18 (E04) | R - W-B | Air fuel ratio sensor heater operation signal | Engine stopped, ignition switch ON | 11 to 14 V |
| Idling with cold engine | Pulse generation (See waveform 9) |
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| C62-21 (#2D+) - C62-20 (#2D-) | V - P | No. 2 fuel injector assembly signal | Idling with warm engine | Pulse generation |
| C62-22 (#3D+) - C62-23 (#3D-) | G - R | No. 3 fuel injector assembly signal | Idling with warm engine | Pulse generation |
| C62-25 (#4D+) - C62-24 (#4D-) | W - B | No. 4 fuel injector assembly signal | Idling with warm engine | Pulse generation |
| C62-26 (#1D+) - C62-27 (#1D-) | G - R | No. 1 fuel injector assembly signal | Idling with warm engine | Pulse generation |
| C62-28 (FP1+) - C62-29 (FP1-) | P - V | Fuel pump (for high pressure side) signal | Engine running | Pulse generation |
| C62-30 (+BD1) - C62-53 (E1) | G - W-B | Power source of ECU (injector driver) | Engine stopped, ignition switch ON | 11 to 14 V |
| C62-34*1 (D) - C62-53 (E1) | Y - W-B | D shift position switch signal | D shift position switch signal | 11 to 14 V |
| Ignition switch ON, shift lever not in D or M | Below 1 V | |||
| C62-35*1 (R) - C62-53 (E1) | R - W-B | R shift position switch signal | Ignition switch ON, shift lever in R | 11 to 14 V |
| Ignition switch ON, shift lever not in R | Below 1 V | |||
| C62-37 (WGV+) - C62-36 (WGV-) | B - Y | Vacuum regulating valve assembly operation signal | Vacuum regulating valve assembly operating | Pulse generation |
| C62-38 (OE1+) - C62-68 (OE1-) | G - P | Cam timing oil control solenoid assembly (for exhaust camshaft) operation signal | Idling | Pulse generation (See waveform 10) |
| C62-39 (IGT4) - C62-53 (E1) | V - W-B | No. 4 ignition coil assembly signal (ignition signal) | Idling with warm engine | Pulse generation (See waveform 11) |
| C62-40 (IGT3) - C62-53 (E1) | G - W-B | No. 3 ignition coil assembly signal (ignition signal) | Idling with warm engine | Pulse generation (See waveform 11) |
| C62-41 (IGT2) - C62-53 (E1) | B - W-B | No. 2 ignition coil assembly signal (ignition signal) | Idling with warm engine | Pulse generation (See waveform 11) |
| C62-42 (IGT1) - C62-53 (E1) | GR - W-B | No. 1 ignition coil assembly signal (ignition signal) | Idling with warm engine | Pulse generation (See waveform 11) |
| C62-46 (M-) - C62-49 (ME01) | P - W-B | Throttle actuator operation signal (negative terminal) | Idling with warm engine | Pulse generation (See waveform 12) |
| C62-48 (+BM) - C62-53 (E1) | GR - W-B | Power source of throttle actuator | Always | 11 to 14 V |
| C62-60 (+BD2) - C62-53 (E1) | R - W-B | Power source of ECU (injector driver) | Engine stopped, ignition switch ON | 11 to 14 V |
| C62-64 (P)*1 - C62-53 (E1) | B - W-B | P shift position switch signal | Ignition switch ON, shift lever in P | 11 to 14 V |
| Ignition switch ON, shift lever not in P | Below 1 V | |||
| C62-65 (N)*1 - C62-53 (E1) | L - W-B | N shift position switch signal | Ignition switch ON, shift lever in N | 11 to 14 V |
| Ignition switch ON, shift lever not in N | Below 1 V | |||
| C62-67 (ABV) - C62-53 (E1) | BR - W-B | Air by-pass valve operation signal | Engine stopped, ignition switch ON | 11 to 14 V |
| Air by-pass valve operating | 1.5 V or less | |||
| C62-69 (EOJV) - C62-53 (E1) | LG - W-B | Oil pressure switching valve assembly operation signal | Oil pressure switching valve assembly operating | 1.5 V or less |
| Oil pressure switching valve assembly not operating | 11 to 14 V | |||
| C62-70 (PRG) - C62-53 (E1) | L - W-B | Purge VSV operation signal | Engine stopped, ignition switch ON | 11 to 14 V |
| Idling with warm engine, under purge control | Pulse generation (See waveform 13) |
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| C62-76 (NE+) - C62-109 (NE-) | R - Y | Crankshaft position sensor signal | Idling with warm engine | Pulse generation (See waveform 14) |
| C62-81 (EV1+) - C62-112 (EV1-) | R - B | Camshaft position sensor (for exhaust camshaft) signal | Idling with warm engine | Pulse generation (See waveform 15) |
| C62-82 (VV1+) - C62-114 (VV1-) | W - P | Camshaft position sensor (for intake camshaft) signal | Idling with warm engine | Pulse generation (See waveform 15) |
| C62-88 (VTA2) - C62-120 (ETA) | B - G | Throttle position sensor signal (for sensor malfunction detection) | Ignition switch ON, accelerator pedal fully released | 2.1 to 3.1 V |
| Engine running, accelerator pedal fully depressed | 4.6 to 5.0 V | |||
| C62-89 (VCCL) - C62-53 (E1) | R - W-B | Power supply for clutch stroke sensor | Ignition switch ON | 4.5 to 5.5 V |
| C62-92 (VG) - C62-91 (E2G) | G - L | Mass air flow meter signal | Idling, shift lever in P or N (neutral), A/C off | 0.5 to 3.0 V |
| C62-94 (THA) - C62-93 (ETHA) | V - GR | Intake air temperature sensor (Mass air flow meter) signal | Idling, intake air temperature 0 to 80°C (32 to 176°F) | 0.5 to 3.4 V |
| C62-97 (THEO) - C62-96 (ETHE) | BR - L | Engine oil temperature sensor signal | Idling with warm engine | 0 to 5.0 V |
| C62-98 (PEO) - C62-129 (EPEO) | W - SB | Oil pressure sender gauge assembly signal | Idling with warm engine | 0.5 to 4.5 V |
| C62-99 (OX1B) - C62-100 (EX1B) | W - B | Heated oxygen sensor signal | Engine speed maintained at 2500 rpm for 2 minutes after warming up engine | Pulse generation (See waveform 16) |
| C62-101 (IGF1) - C62-53 (E1) | L - W-B | Ignition coil assembly (ignition confirmation signal) | Idling with warm engine | Pulse generation (See waveform 11) |
| C62-103 (PR) - C62-135 (EPR) | L - V | Fuel pressure sensor signal | Idling with warm engine | 0.5 to 4.5 V |
| C62-104 (THW) - C62-105 (ETHW) | L - BR | Engine coolant temperature sensor signal | Idling, engine coolant temperature 75 to 100°C (167 to 212°F) | 0.2 to 1.0 V |
| C62-106 (PIM) - C62-137 (EPIM) | R - V | No. 2 turbo pressure sensor signal | Idling with warm engine | 1.0 to 4.5 V |
| C62-107 (THIM) - C62-53 (E1) | BR - W-B | Intake air temperature sensor (No. 2 turbo pressure sensor) signal | Idling with warm engine | 0 to 5.0 V |
| C62-108 (PTA) - C62-139 (EPTA) | B - V | No. 1 turbo pressure sensor signal | Idling with warm engine | 1.0 to 4.5 V |
| C62-110 (VCNE) - C62-53 (E1) | L - W-B | Power source of crankshaft position sensor (specific voltage) | Engine stopped, ignition switch ON | 4.5 to 5.5 V |
| C62-111 (VCE1) - C62-53 (E1) | W - W-B | Power source of camshaft position sensor (for exhaust camshaft) (specific voltage) | Engine stopped, ignition switch ON | 4.5 to 5.5 V |
| C62-113 (VCV1) - C62-53 (E1) | L - W-B | Power source of camshaft position sensor (for intake camshaft) (specific voltage) | Engine stopped, ignition switch ON | 4.5 to 5.5 V |
| C62-121 (VCTA) - C62-120 (ETA) | R - G | Power source of throttle position sensor (specific voltage) | Engine stopped, ignition switch ON | 4.5 to 5.5 V |
| C62-119 (CLS) - C62-87 (E2CL) | G - W | Clutch pedal stroke sensor assembly signal | Ignition switch ON and clutch pedal fully released | 0.2 to 1.5 V |
| Ignition switch ON and clutch pedal fully depressed | 2.5 to 4.8 V | |||
| C62-122 (VTA1) - C62-120 (ETA) | BE - G | Throttle position sensor signal (for engine control) | Ignition switch ON, accelerator pedal fully released | 0.6 to 1.1 V |
| Engine running, accelerator pedal fully depressed | 3.2 to 4.8 V | |||
| C62-124 (KNK1) - C62-123 (EKNK) | B - W | Knock sensor signal | Engine speed maintained at 4000 rpm after warming up engine | Pulse generation (See waveform 17) |
| C62-130 (VCPE) - C62-53 (E1) | B - W-B | Power source of oil pressure sender gauge assembly (specific voltage) | Engine stopped, ignition switch ON | 4.75 to 5.25 V |
| C62-131 (A1A+) - C62-53 (E1) | G - W-B | Air fuel ratio sensor signal | Engine stopped, ignition switch ON | 3.0 to 3.6 V*4 |
| C62-132 (A1A-) - C62-53 (E1) | R - W-B | Air fuel ratio sensor signal | Engine stopped, ignition switch ON | 2.7 to 3.3 V*4 |
| C62-136 (VCPR) - C62-53 (E1) | G - W-B | Power source of fuel pressure sensor (specific voltage) | Engine stopped, ignition switch ON | 4.5 to 5.5 V |
| C62-138 (VCPM) - C62-53 (E1) | G - W-B | Power source of No. 2 turbo pressure sensor (specific voltage) | Engine stopped, ignition switch ON | 4.75 to 5.25 V |
| C62-140 (VPTA) - C62-53 (E1) | GR - W-B | Power source of No. 1 turbo pressure sensor (specific voltage) | Engine stopped, ignition switch ON | 4.75 to 5.25 V |
| A38-14 (EC) - Body ground | W-B - - | Ground | Always | Below 1 Ω |
| C62-18 (E04) - Body ground | W-B - - | Ground | Always | Below 1 Ω |
| C62-47 (GE01) - Body ground | BR - - | Shielded earth (ground) circuit of throttle actuator | Always | Below 1 Ω |
| C62-49 (ME01) - Body ground | W-B - - | Ground | Always | Below 1 Ω |
| C62-50 (E02) - Body ground | W-B - - | Ground | Always | Below 2 Ω |
| C62-51 (E01) - Body ground | W-B - - | Ground | Always | Below 3 Ω |
| C62-53 (E1) - Body ground | W-B - - | Ground | Always | Below 4 Ω |
| C62-58 (E1D2) - Body ground | Y - - | Ground | Always | Below 5 Ω |
| C62-59 (E1D1) - Body ground | L - - | Ground | Always | Below 6 Ω |
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*1: for CVT
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*2: w/ Entry and Start System
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*3: w/o Entry and Start System
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*4: The ECM terminal voltage is contact regardless of the voltage output from the sensor.
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WAVEFORM 1
*a 1 V/DIV. *b 10 μs./DIV. CAN Communication Signal (Reference) ECM Terminal Name Between CANH and E1 Tester Range 1 V/DIV., 10 μs./DIV. Condition Engine stopped, ignition switch ON Tech Tips
The waveform varies depending on the CAN communication signal.
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WAVEFORM 2
*a 1 V/DIV. *b 10 μs./DIV. CAN Communication Signal (Reference) ECM Terminal Name Between CANL and E1 Tester Range 1 V/DIV., 10 μs./DIV. Condition Engine stopped, ignition switch ON Tech Tips
The waveform varies depending on the CAN communication signal.
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WAVEFORM 3
*a 2 V/DIV. *b 2 ms./DIV. Engine Speed Signal ECM Terminal Name Between NEO and E1 Tester Range 2 V/DIV., 2 ms./DIV. Condition Idling with warm engine Tech Tips
The wavelength becomes shorter as the engine speed increases.
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WAVEFORM 4
*a 5 V/DIV. *b 10 ms./DIV. Engine Speed Signal ECM Terminal Name Between TACH and E1 Tester Range 5 V/DIV., 10 ms./DIV. Condition Idling with warm engine Tech Tips
The wavelength becomes shorter as the engine speed increases.
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WAVEFORM 5
*a 2 V/DIV. *b 20 ms./DIV. Vehicle Speed Signal ECM Terminal Name Between SPD and E1 Tester Range 2 V/DIV., 20 ms./DIV. Condition Driving at 20 km/h (12 mph) Tech Tips
The wavelength becomes shorter as the vehicle speed increases.
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WAVEFORM 6
*a 1 V/DIV. *b 20 ms./DIV. Cooling Fan Control Signal ECM Terminal Name Between RFC and E1 Tester Range 1 V/DIV., 20 ms./DIV. Condition Ignition switch ON, A/C switch on (max cool) Tech Tips
The duty ratio varies depending on the engine coolant temperature.
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WAVEFORM 7
*a 5 V/DIV. *b 1 ms./DIV. Cam Timing Oil Control Solenoid Assembly (for Intake Camshaft) Operation Signal ECM Terminal Name Between OC1+ and OC1- Tester Range 5 V/DIV., 1 ms./DIV. Condition Idling -
WAVEFORM 8
*a 5 V/DIV. *b 1 ms./DIV. Throttle Actuator Positive Terminal Signal ECM Terminal Name Between M+ and ME01 Tester Range 5 V/DIV., 1 ms./DIV. Condition Idling with warm engine Tech Tips
The duty ratio varies depending on the throttle actuator operation.
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WAVEFORM 9
*a 5 V/DIV. *b 10 ms./DIV. Air Fuel Ratio Sensor Heater Operation Signal ECM Terminal Name Between HA1A and E04 Tester Range 5 V/DIV., 10 ms./DIV. Condition Idling with cold engine -
WAVEFORM 10
*a 5 V/DIV. *b 1 ms./DIV. Cam Timing Oil Control Solenoid Assembly (for Exhaust Camshaft) Operation Signal ECM Terminal Name Between OE1+ and OE1- Tester Range 5 V/DIV., 1 ms./DIV. Condition Idling -
WAVEFORM 11
*a 2 V/DIV. *b 20 ms./DIV. Ignition Coil Assembly Signal (IGT and IGF Signal) ECM Terminal Name CH1: Between IGT (1 to 4) and E1
CH2: Between IGF1 and E1
Tester Range 2 V/DIV., 20 ms./DIV. Condition Idling with warm engine Tech Tips
The wavelength becomes shorter as the engine speed increases.
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WAVEFORM 12
*a 5 V/DIV. *b 1 ms./DIV. Throttle Actuator Negative Terminal Signal ECM Terminal Name Between M- and ME01 Tester Range 5 V/DIV., 1 ms./DIV. Condition Idling with warm engine Tech Tips
The duty ratio varies depending on the throttle actuator operation.
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WAVEFORM 13
*1 10 V/DIV. *2 20 ms./DIV. Purge VSV Operation Signal ECM Terminal Name Between PRG and E1 Tester Range 10 V/DIV., 20 ms./DIV. Condition Idling with warm engine, under purge control 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 14
*a 2 V/DIV. *b 20 ms./DIV. Crankshaft Position Sensor Signal ECM Terminal Name Between NE+ and NE- Tester Range 2 V/DIV., 20 ms./DIV. Condition Idling with warm engine Tech Tips
The wavelength becomes shorter as the engine speed increases.
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WAVEFORM 15
*a 5 V/DIV. *b 20 ms./DIV. Camshaft Position Sensor Signal ECM Terminal Name CH1: Between VV1+ and VV1-
CH2: Between EV1+ and EV1-
Tester Range 5 V/DIV., 20 ms./DIV. Condition Idling with warm engine Tech Tips
The wavelength becomes shorter as the engine speed increases.
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WAVEFORM 16
*1 0.2 V/DIV. *2 200 ms./DIV. Heated Oxygen Sensor Signal ECM Terminal Name Between OX1B and EX1B Tester Range 0.2 V/DIV., 200 ms./DIV. Condition Engine speed maintained at 2500 rpm for 2 minutes after warming up engine Tech Tips
Data List item "O2 Sensor Voltage B1S2" shows the ECM values from the heated oxygen sensor.
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WAVEFORM 17
*a 1 V/DIV. *b 1 ms./DIV. Knock Sensor Signal ECM Terminal Name Between KNK1 and EKNK Tester Range 1 V/DIV., 1 ms./DIV. Condition Engine speed maintained at 4000 rpm after warming up engine Tech Tips
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The wavelength becomes shorter as the engine speed increases.
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The waveforms and amplitudes displayed will differ slightly depending on the vehicle.
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