SFI SYSTEM TERMINALS OF ECM
| *A | for LHD | *B | for RHD |
Tech Tips
The standard normal voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard normal voltage for that pair of terminals, and 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 |
|---|---|---|---|---|
| A93-1 (+B1) - A93-4 (E1) | B - W-B | Power source of ECM | Ignition switch ON | 11 to 14 V |
| A93-2 (+B) - A93-4 (E1) | B - W-B | Power source of ECM | Ignition switch ON | 11 to 14 V |
| A93-27 (FC) - A93-4 (E1) | V - W-B | Fuel pump control | Ignition switch ON | 11 to 14 V |
| Idling | Below 1.5 V | |||
| A93-41 (SPD) - A93-4 (E1) | V - W-B | Vehicle speed signal from combination meter assembly signal | Vehicle speed of approximately 20 km/h (12 mph) | Pulse generation (See waveform 1) |
| A93-45 (TACH) - A93-4 (E1) | LG - W-B | Engine speed signal | Idling with warm engine | Pulse generation (See waveform 2) |
| A93-15 (BATT) - A93-4 (E1) | V - W-B | Battery (for measuring battery voltage) | Always | 11 to 14 V |
| A93-28 (W) - A93-4 (E1) | B - W-B | Power source of accelerator pedal position sensor (for VPA) | Ignition switch ON | 0 to 3.0 V |
| A93-57 (TC) - A93-4 (E1) | L - W-B | Terminal TC of DLC3 | Ignition switch ON | 11 to 14 V |
| A93-37 (IGSW) - A93-4 (E1) | R - W-B | Ignition switch signal | Ignition switch ON | 11 to 14 V |
| A93-38 (ELS) - A93-4 (E1) | G - W-B | Electric load | Taillight switch on | 11 to 14 V |
| Taillight switch off | 0 to 1.5 V | |||
| A93-36 (ELS2) - A93-4 (E1) | R - W-B | Electric load | Defogger switch on | 11 to 14 V |
| Defogger switch off | 0 to 1.5 V | |||
| A93-24 (ST1-) - A93-4 (E1) | Y - W-B | Stop light switch assembly signal (opposite of voltage at STP terminal) | Ignition switch ON, brake pedal depressed | Below 1.5 V |
| Ignition switch ON, brake pedal released | 11 to 14 V | |||
| A93-40 (STP) - A93-4 (E1) | LG - W-B | Stop light switch assembly signal | Brake pedal depressed | 11 to 14 V |
| Brake pedal released | Below 1.5 V | |||
| A93-26 (CANH) - A93-4 (E1) | L - W-B | CAN communication line | Ignition switch ON | Pulse generation (See waveform 3) |
| A93-25 (CANL) - A93-4 (E1) | W - W-B | CAN communication line | Ignition switch ON | Pulse generation (See waveform 4) |
| A93-9 (MREL) - A93-4 (E1) | GR - W-B | EFI MAIN relay operation signal | Ignition switch ON | 11 to 14 V |
| A93-46 (STA) - A93-4 (E1) | BR - W-B | Starter signal | Ignition switch ON | Below 1.5 V |
| Cranking | 5.5 V or higher | |||
| A93-51 (VPA) - A93-52 (EPA) | R - G | Accelerator pedal position sensor (for engine control) | Ignition switch ON, accelerator pedal fully released | 0.7 to 1.2 V |
| Ignition switch ON, Accelerator pedal fully depressed | 2.8 to 4.6 V | |||
| A93-54 (VPA2) - A93-55 (EPA2) | L - B | Accelerator pedal position sensor | Ignition switch ON, accelerator pedal fully released | 1.2 to 2.0 V |
| Ignition switch ON, Accelerator pedal fully depressed | 3.6 to 4.6 V | |||
| A93-53 (VCPA) - A93-52 (EPA) | G - G | Power source of accelerator pedal position sensor (for VPA) | Ignition switch ON | 4.5 to 5.5 V |
| A93-56 (VCP2) - A93-55 (EPA2) | W - B | Power source of accelerator pedal position sensor (for VPA2) | Ignition switch ON | 4.5 to 5.5 V |
| A93-22 (FANL) - A93-4 (E1) | R - W-B | FAN NO.1 relay | Ignition switch ON Cooling fan not operated | 11 to 14 V |
| Idling with A/C on or High engine coolant temperature Cooling fan operated | Below 1.5 V | |||
| A93-23 (FANH) - A93-4 (E1) | G - W-B | FAN NO.2 relay | Idling with high engine coolant temperature Cooling fan operated at high speed | Below 1.5 V |
| A93-13 (CANP) - A93-4 (E1) | B - W-B | CAN communication line | Ignition switch ON | Pulse generation (See waveform 3) |
| A93-12 (CANN) - A93-4 (E1) | W - W-B | CAN communication line | Ignition switch ON | Pulse generation (See waveform 4) |
| A93-44 (NEO) - A93-4 (E1) | V - BR | Crankshaft position sensor signal | Idling with warm engine | Pulse generation (See waveform 5) |
| A93-4 (E1) - Body ground | W-B - Body ground | Earth (ground) circuit of ECM | Always | Below 1 Ω |
| A93-5 (E01) - Body ground | W-B - Body ground | Earth (ground) circuit of ECM | Always | Below 1 Ω |
| A93-17 (E02) - Body ground | W-B - Body ground | Earth (ground) circuit of ECM | Always | Below 1 Ω |
| B97-30 (M+) - B97-60 (M-) | G - R | Throttle actuator | Idling with warm engine | Pulse generation |
| B97-103 (OX1B) - B97-135 (E12) | P - L | No. 2 heated oxygen sensor signal | Engine speed maintained at 2500 rpm for 2 minutes after warming up engine | Pulse generation |
| B97-86 (THA) - B97-85 (E21) | P - G | Intake air temperature sensor signal (built into manifold absolute pressure sensor) | Idling, intake air temperature 20°C (68°F) | 1.5 to 3.0 V |
| B97-115 (VC) - B97-116 (ETA) | L - R | Power source of throttle position sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| B97-118 (VC2) - B97-85 (E21) | V - G | Power source of manifold absolute pressure sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| B97-87 (PIM) - B97-85 (E21) | B - G | Manifold absolute pressure sensor signal | Idling | 1.2 to 2.0 V |
| B97-95 (THW) - B97-96 (ETHW) | R - P | Engine coolant temperature sensor signal | Idling with warm engine, engine coolant temperature 80°C (176°F) | 0.2 to 1.0 V |
| B97-82 (G1) - B97-114 (G-) | R - W | Camshaft position sensor signal | Idling with warm engine | Pulse generation |
| B97-75 (OCV+) - B97-74 (OCV-) | W - R | Camshaft timing oil control valve assembly signal | Engine speed maintained at 2500 rpm after warming up engine. | Pulse generation (See waveform 6) |
| B97-124 (KNK1) - B97-123 (EKNK) | R - G | Knock sensor signal | Engine speed maintained at 4000 rpm after warming up engine | Pulse generation (See waveform 7) |
| B97-102 (OX1A) - B97-101 (E11) | W - BR | Heated oxygen sensor signal | Engine speed maintained at 2500 rpm for 2 minutes after warming up engine | Pulse generation |
| B97-83 (VTA2) - B97-116 (ETA) | GR - R | Throttle position sensor signal (for sensor malfunction detection) | Ignition switch ON, accelerator pedal fully released | 4.0 to 4.8 V |
| Ignition switch ON, Accelerator pedal fully depressed | 0.2 to 1.0 V | |||
| B97-84 (VTA1) - B97-116 (ETA) | Y - R | Throttle position sensor signal (for engine control) | Ignition switch ON, accelerator pedal fully released | 0.2 to 1.0 V |
| Ignition switch ON, Accelerator pedal fully depressed | 4.0 to 4.8 V | |||
| B97-79 (R) - A93-4 (E1) | R - W-B | Back-up light switch assembly signal | Back-up light switch on | 11 to 14 V |
| B97-78 (NE+) - B97-110 (NE-) | L - G*1 B - BR*2 |
Crankshaft position sensor signal | Idling with warm engine | Pulse generation |
| B97-25 (HT1B) - A93-4 (E1) | LG - W-B | No. 2 heated oxygen sensor heater operation signal | Ignition switch ON | 11 to 14 V |
| B97-76 (EVP1) - A93-4 (E1) | L - W-B | Purge VSV operation signal | Ignition switch ON | 11 to 14 V |
| Idling, under purge control | Pulse generation (See waveform 7) |
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| B97-58 (EGR4) - A93-4 (E1) B97-59 (EGR3) - A93-4 (E1) B97-28 (EGR2) - A93-4 (E1) B97-29 (EGR1) - A93-4 (E1) |
Y - W-B W - W-B LG - W-B R - W-B |
EGR valve assembly operation signal | Engine racing | Pulse generation |
| B97-27 (IGT1)- A93-4 (E1) B97-26 (IGT2)- A93-4 (E1) B97-57 (IGT3)- A93-4 (E1) |
W - W-B BE - W-B G - W-B |
No. 1 ignition coil (ignition signal) | Idling | Pulse generation |
| B97-21 (#3)- A93-5 (E01) B97-20 (#2)- A93-5 (E01) B97-23 (#1)- A93-5 (E01) |
P- W-B GR - W-B R - W-B |
Fuel injector assembly | Ignition switch ON | 11 to 14 V |
| B97-24 (HT1A) - A93-4 (E1) | G - W-B | Heated oxygen sensor heater operation signal | Ignition switch ON | 11 to 14 V |
| B97-77 (VCNE)*1 - A93-4 (E1) | R - W-B | Power source of crankshaft position sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| B97-113 (VCG1) - A93-4 (E1) | LG - W-B | Power source of camshaft position sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| B97-112 (NSW) - A93-4 (E1) | BE - W-B | Clutch start switch signal | Ignition switch ON (Clutch pedal fully depressed) |
Below 1.5 V |
| Ignition switch ON (Clutch pedal released) |
11 to 14 V | |||
| B97-81 (D) - A93-4 (E1) | L - W-B | No. 2 clutch start switch assembly (upper) |
Ignition switch ON Clutch pedal released |
11 to 14 V |
| Ignition switch ON Clutch pedal depressed |
Below 1.5 V | |||
| B97-55 (GE01) - Body ground | L - Body ground | Shielded earth (ground) circuit | Always | Below 1 Ω |
| B97-122 (ESKN) - Body ground | G - Body ground | Shielded earth (ground) circuit | Always | Below 1 Ω |
| B97-133 (DE11) - Body ground | R - Body ground | Shielded earth (ground) circuit | Always | Below 1 Ω |
| B97-134 (DE12) - Body ground | BR - Body ground | Shielded earth (ground) circuit | Always | Below 1 Ω |
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*1: w/ Stop and Start System
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*2: w/o Stop and Start System
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| A93-1 (+B1) - A93-4 (E1) | B - W-B | Power source of ECM | Ignition switch ON | 11 to 14 V |
| A93-2 (+B) - A93-4 (E1) | B - W-B | Power source of ECM | Ignition switch ON | 11 to 14 V |
| A93-27 (FC) - A93-4 (E1) | V - W-B | Fuel pump control | Ignition switch ON | 11 to 14 V |
| Idling | Below 1.5 V | |||
| A93-41 (SPD) - A93-4 (E1) | V - W-B | Vehicle speed signal from combination meter assembly signal | Vehicle speed of approximately 20 km/h (12 mph) | Pulse generation (See waveform 1) |
| A93-45 (TACH) - A93-4 (E1) | LG - W-B | Engine speed signal | Idling with warm engine | Pulse generation (See waveform 2) |
| A93-15 (BATT) - A93-4 (E1) | V - W-B | Battery (for measuring battery voltage) | Always | 11 to 14 V |
| A93-28 (W) - A93-4 (E1) | B - W-B | Power source of accelerator pedal position sensor (for VPA) | Ignition switch ON | 0 to 3.0 V |
| A93-57 (TC) - A93-4 (E1) | L - W-B | Terminal TC of DLC3 | Ignition switch ON | 11 to 14 V |
| A93-37 (IGSW) - A93-4 (E1) | R - W-B | Ignition switch signal | Ignition switch ON | 11 to 14 V |
| A93-38 (ELS) - A93-4 (E1) | G - W-B | Electric load | Taillight switch on | 11 to 14 V |
| Taillight switch off | 0 to 1.5 V | |||
| A93-36 (ELS2) - A93-4 (E1) | R - W-B | Electric load | Defogger switch on | 11 to 14 V |
| Defogger switch off | 0 to 1.5 V | |||
| A93-24 (ST1-) - A93-4 (E1) | Y - W-B | Stop light switch assembly signal (opposite of voltage at STP terminal) | Ignition switch ON, brake pedal depressed | Below 1.5 V |
| Ignition switch ON, brake pedal released | 11 to 14 V | |||
| A93-40 (STP) - A93-4 (E1) | LG - W-B | Stop light switch assembly signal | Brake pedal depressed | 11 to 14 V |
| Brake pedal released | Below 1.5 V | |||
| A93-26 (CANH) - A93-4 (E1) | L - W-B | CAN communication line | Ignition switch ON | Pulse generation (See waveform 3) |
| A93-25 (CANL) - A93-4 (E1) | W - W-B | CAN communication line | Ignition switch ON | Pulse generation (See waveform 4) |
| A93-9 (MREL) - A93-4 (E1) | GR - W-B | EFI MAIN relay operation signal | Ignition switch ON | 11 to 14 V |
| A93-46 (STA) - A93-4 (E1) | BR - W-B | Starter signal | Ignition switch ON | Below 1.5 V |
| Cranking | 5.5 V or higher | |||
| A93-51 (VPA) - A93-52 (EPA) | R - G | Accelerator pedal position sensor (for engine control) | Ignition switch ON, accelerator pedal fully released | 0.7 to 1.2 V |
| Ignition switch ON, Accelerator pedal fully depressed | 2.8 to 4.6 V | |||
| A93-54 (VPA2) - A93-55 (EPA2) | L - B | Accelerator pedal position sensor | Ignition switch ON, accelerator pedal fully released | 1.2 to 2.0 V |
| Ignition switch ON, Accelerator pedal fully depressed | 3.6 to 4.6 V | |||
| A93-53 (VCPA) - A93-52 (EPA) | G - G | Power source of accelerator pedal position sensor (for VPA) | Ignition switch ON | 4.5 to 5.5 V |
| A93-56 (VCP2) - A93-55 (EPA2) | W - B | Power source of accelerator pedal position sensor (for VPA2) | Ignition switch ON | 4.5 to 5.5 V |
| A93-22 (FANL) - A93-4 (E1) | R - W-B | FAN NO.1 relay | Ignition switch ON Cooling fan not operated | 11 to 14 V |
| Idling with A/C on or High engine coolant temperature Cooling fan operated | Below 1.5 V | |||
| A93-23 (FANH) - A93-4 (E1) | G - W-B | FAN NO.2 relay | Idling with high engine coolant temperature Cooling fan operated at high speed | Below 1.5 V |
| A93-13 (CANP) - A93-4 (E1) | B - W-B | CAN communication line | Ignition switch ON | Pulse generation (See waveform 3) |
| A93-12 (CANN) - A93-4 (E1) | W - W-B | CAN communication line | Ignition switch ON | Pulse generation (See waveform 4) |
| A93-44 (NEO) - A93-4 (E1) | V - BR | Crankshaft position sensor signal | Idling with warm engine | Pulse generation (See waveform 5) |
| A93-4 (E1) - Body ground | W-B - Body ground | Earth (ground) circuit of ECM | Always | Below 1 Ω |
| A93-5 (E01) - Body ground | W-B - Body ground | Earth (ground) circuit of ECM | Always | Below 1 Ω |
| A93-17 (E02) - Body ground | W-B - Body ground | Earth (ground) circuit of ECM | Always | Below 1 Ω |
| B101-30 (M+) - B101-60 (M-) | G - R | Throttle actuator | Idling with warm engine | Pulse generation |
| B101-103 (OX1B) - B101-135 (E12) | P - L | No. 2 heated oxygen sensor signal | Engine speed maintained at 2500 rpm for 2 minutes after warming up engine | Pulse generation |
| B101-86 (THA) - B101-85 (E21) | P - G | Intake air temperature sensor signal (built into manifold absolute pressure sensor) | Idling, intake air temperature 20°C (68°F) | 1.5 to 3.0 V |
| B101-115 (VC) - B101-116 (ETA) | L - R | Power source of throttle position sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| B101-118 (VC2) - B101-85 (E21) | V - G | Power source of manifold absolute pressure sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| B101-87 (PIM) - B101-85 (E21) | B - G | Manifold absolute pressure sensor signal | Idling | 1.2 to 2.0 V |
| B101-95 (THW) - B101-96 (ETHW) | R - P | Engine coolant temperature sensor signal | Idling with warm engine, engine coolant temperature 80°C (176°F) | 0.2 to 1.0 V |
| B101-82 (G1) - B101-114 (G-) | R - W | Camshaft position sensor signal | Idling with warm engine | Pulse generation |
| B101-75 (OCV+) - B101-74 (OCV-) | W - R | Camshaft timing oil control valve assembly signal | Engine speed maintained at 2500 rpm after warming up engine. | Pulse generation (See waveform 6) |
| B101-124 (KNK1) - B101-123 (EKNK) | R - G | Knock sensor signal | Engine speed maintained at 4000 rpm after warming up engine | Pulse generation (See waveform 7) |
| B101-102 (OX1A) - B101-101 (E11) | W - BR | Heated oxygen sensor signal | Engine speed maintained at 2500 rpm for 2 minutes after warming up engine | Pulse generation |
| B101-83 (VTA2) - B101-116 (ETA) | GR - R | Throttle position sensor signal (for sensor malfunction detection) | Ignition switch ON, accelerator pedal fully released | 4.0 to 4.8 V |
| Ignition switch ON, Accelerator pedal fully depressed | 0.2 to 1.0 V | |||
| B101-84 (VTA1) - B101-116 (ETA) | Y - R | Throttle position sensor signal (for engine control) | Ignition switch ON, accelerator pedal fully released | 0.2 to 1.0 V |
| Ignition switch ON, Accelerator pedal fully depressed | 4.0 to 4.8 V | |||
| B101-79 (R) - A93-4 (E1) | R - W-B | Back-up light switch assembly signal | Back-up light switch on | 11 to 14 V |
| B101-78 (NE+) - B101-110 (NE-) | L - G*1 B - BR*2 |
Crankshaft position sensor signal | Idling with warm engine | Pulse generation |
| B101-25 (HT1B) - A93-4 (E1) | LG - W-B | No. 2 heated oxygen sensor heater operation signal | Ignition switch ON | 11 to 14 V |
| B101-76 (EVP1) - A93-4 (E1) | L - W-B | Purge VSV operation signal | Ignition switch ON | 11 to 14 V |
| Idling, under purge control | Pulse generation (See waveform 7) |
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| B101-58 (EGR4) - A93-4 (E1) B101-59 (EGR3) - A93-4 (E1) B101-28 (EGR2) - A93-4 (E1) B101-29 (EGR1) - A93-4 (E1) |
Y - W-B W - W-B LG - W-B R - W-B |
EGR valve assembly operation signal | Engine racing | Pulse generation |
| B101-27 (IGT1)- A93-4 (E1) B101-26 (IGT2)- A93-4 (E1) B101-57 (IGT3)- A93-4 (E1) |
W - W-B BE - W-B G - W-B |
No. 1 ignition coil (ignition signal) | Idling | Pulse generation |
| B101-21 (#3)- A93-5 (E01) B101-20 (#2)- A93-5 (E01) B101-23 (#1)- A93-5 (E01) |
P- W-B GR - W-B R - W-B |
Fuel injector assembly | Ignition switch ON | 11 to 14 V |
| B101-24 (HT1A) - A93-4 (E1) | G - W-B | Heated oxygen sensor heater operation signal | Ignition switch ON | 11 to 14 V |
| B101-77 (VCNE)*1 - A93-4 (E1) | R - W-B | Power source of crankshaft position sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| B101-113 (VCG1) - A93-4 (E1) | LG - W-B | Power source of camshaft position sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5V |
| B101-112 (NSW) - A93-4 (E1) | BE - W-B | Clutch start switch signal | Ignition switch ON (Clutch pedal fully depressed) |
Below 1.5 V |
| Ignition switch ON (Clutch pedal released) |
11 to 14 V | |||
| B101-81 (D) - A93-4 (E1) | L - W-B | No. 2 clutch start switch assembly (upper) |
Ignition switch ON Clutch pedal released |
11 to 14 V |
| Ignition switch ON Clutch pedal depressed |
Below 1.5 V | |||
| B101-55 (GE01) - Body ground | L - Body ground | Shielded earth (ground) circuit | Always | Below 1 Ω |
| B101-122 (ESKN) - Body ground | G - Body ground | Shielded earth (ground) circuit | Always | Below 1 Ω |
| B101-133 (DE11) - Body ground | R - Body ground | Shielded earth (ground) circuit | Always | Below 1 Ω |
| B101-134 (DE12) - Body ground | BR - Body ground | Shielded earth (ground) circuit | Always | Below 1 Ω |
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*1: w/ Stop and Start System
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*2: w/o Stop and Start System
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WAVEFORM 1
*a 5 V/DIV *b 20 ms/DIV Vehicle Speed Signal ECM Terminal Name Between SPD and E1 Tester Range 5 V/DIV, 20 ms/DIV Condition Vehicle speed of approximately 20 km/h (12 mph) Tech Tips
The wavelength becomes shorter as the vehicle speed increases.
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WAVEFORM 2
*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 engine rpm increases.
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WAVEFORM 3
*a 1 V/DIV *b 10 μs/DIV CAN Communication Signal (Reference) ECM Terminal Name Between CANH and E1
Between CANP and E1
Tester Range 1 V/DIV, 10 μs/DIV Condition Ignition switch ON Tech Tips
The waveform varies depending on the CAN communication signal.
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WAVEFORM 4
*a 1 V/DIV *b 10 μs/DIV CAN Communication Signal (Reference) ECM Terminal Name Between CANL and E1
Between CANN and E1
Tester Range 1 V/DIV, 10 μ/DIV Condition Ignition switch ON Tech Tips
The waveform varies depending on the CAN communication signal.
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WAVEFORM 5
*a 5 V/DIV *b 2 ms/DIV Crankshaft Position Sensor Signal ECM Terminal Name Between NEO and E1 Tester Range 5 V/DIV, 2 ms/DIV Condition Idling with warm engine Tech Tips
The wavelength becomes shorter as engine rpm increases.
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WAVEFORM 6
*a 5 V/DIV *b 1 ms/DIV Camshaft Timing Oil Control Valve Signal ECM Terminal Name Between OCV+ and OCV- Tester Range 5 V/DIV, 1 ms/DIV Condition Engine RPM maintained at 2500 rpm after warming up engine -
WAVEFORM 7
*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 RPM maintained at 4000 rpm after engine warmed up Tech Tips
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The wavelength becomes shorter as engine rpm increases.
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The waveforms and amplitudes displayed differ slightly depending on the vehicle condition.
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WAVEFORM 8
*1 10 V/DIV *2 20 ms/DIV Purge VSV Signal ECM Terminal Name Between EVP1 and E1 Tester Range 10 V/DIV., 20 ms/DIV Condition Idling, 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.