СИСТЕМА SFI КОНТАКТЫ 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 |
|---|---|---|---|---|
| G87-24 (BATT) - C13-12 (E1) | Y - BR | Battery (for measuring battery voltage and for ECM memory) | Always | 11 to 14 V |
| G87-23 (+B) - C13-12 (E1) | L - BR | Power source of ECM | Ignition switch ON | 11 to 14 V |
| G87-22 (+B2) - C13-12 (E1) | B - BR | Power source of ECM | Ignition switch ON | 11 to 14 V |
| G88-28 (STA) - C13-12 (E1) | GR - BR | ST NO. 1 relay operation signal | Cranking | 5.5 V or higher |
| G88-12 (SPD) - C13-12 (E1) | V - BR | Vehicle speed signal from combination meter assembly | Driving at 20 km/h (12 mph) | Pulse generation (see waveform 1) |
| G88-31 (CANH) - C13-12 (E1) | B - BR | CAN communication line | Ignition switch ON | Pulse generation (see waveform 2) |
| G87-3 (EC) - Body ground | BR - - | Ground circuit of ECM | Always | Below 1 Ω |
| G87-5 (FC) - C13-12 (E1) | B - BR | Fuel pump control | Ignition switch ON | 9 to 14 V |
| G87-4 (FPR) - C13-12 (E1) | L - BR | Fuel pump control | Ignition switch ON, STA signal OFF | 0 to 3.0 V |
| G87-4 (FPR) - C13-12 (E1) | L - BR | Fuel pump control | Ignition switch ON, STA signal ON | 9 to 14 V |
| G88-13 (NEO) - C13-12 (E1) | G - BR | Engine speed signal sent to certification ECU (smart key ECU assembly) | Idling with warm engine | Pulse generation (see waveform 3) |
| G88-17 (TACH) - C13-12 (E1) | V - BR | Engine speed signal (for DLC3) | Idling with warm engine | Pulse generation (see waveform 4) |
| G88-25 (CANL) - C13-12 (E1) | W - BR | CAN communication line | Ignition switch ON | Pulse generation (see waveform 5) |
| G87-21 (IGSW) - C13-12 (E1) | GR - BR | Ignition switch signal | Ignition switch ON | 11 to 14 V |
| G88-34 (ST1-) - C13-12 (E1) | GR - BR | 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 | 7.5 to 14 V | |||
| G87-6 (TC) - C13-12 (E1) | R - BR | Terminal TC of DLC3 | Ignition switch ON | 11 to 14 V |
| G88-36 (MREL) - C13-12 (E1) | G - BR | EFI-MAIN NO.1 relay operation signal | Ignition switch ON | 11 to 14 V |
| G88-35 (STP) - C13-12 (E1) | L - BR | Stop light switch assembly signal | Brake pedal depressed | 7.5 to 14 V |
| Brake pedal released | Below 1.5 V | |||
| G87-2 (VPA) - G87-1 (EPA) | W - G | 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 | |||
| G88-6 (VCPA) - G87-1 (EPA) | LG - G | Power source of accelerator pedal position sensor (for VPA) | Ignition switch ON | 4.5 to 5.5 V |
| G88-5 (VPA2) - G88-4 (EPA2) | GR - Y | 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 | |||
| G88-3 (VCP2) - G88-4 (EPA2) | R - Y | Power source of accelerator pedal position sensor (for VPA2) | Ignition switch ON | 4.5 to 5.5 V |
| C15-34 (OC2-) - C15-33 (OC2+) | R - L | Camshaft timing oil control valve assembly (for intake camshaft of bank 2) operation signal | Idling | Pulse generation (see waveform 6) |
| C15-32 (OC1-) - C15-31 (OC1+) | R - L | Camshaft timing oil control valve assembly (for intake camshaft of bank 1) operation signal | Idling | Pulse generation (see waveform 6) |
| C12-12 (HA2A) - C12-11 (E05) | L - W-B | Air fuel ratio sensor (bank 2 sensor 1) heater operation signal | Idling with cold engine | Pulse generation (see waveform 7) |
| Ignition switch ON | 11 to 14 V | |||
| C12-11 (E05) - Body ground | W-B - - | Ground circuit of ECM | Always | Below 1 Ω |
| C12-13 (HT2B) - C12-11 (E05) | L - W-B | Heated oxygen sensor (bank 2 sensor 2) heater operation signal | Idling | Below 3.0 V |
| Ignition switch ON | 11 to 14 V | |||
| C12-14 (E02) - Body ground | W-B - - | Ground circuit of ECM | Always | Below 1 Ω |
| C13-23 (E01) - Body ground | W-B - - | Ground circuit of ECM | Always | Below 1 Ω |
| C12-17 (HA1A) - C12-16 (E04) | Y - W-B | Air fuel ratio sensor (bank 1 sensor 1) heater operation signal | Idling with cold engine | Pulse generation (see waveform 7) |
| Ignition switch ON | 11 to 14 V | |||
| C12-16 (E04) - Body ground | W-B - - | Ground circuit of ECM | Always | Below 1 Ω |
| C12-18 (HT1B) - C12-16 (E04) | G - W-B | Heated oxygen sensor (bank 1 sensor 2) heater operation signal | Idling | Below 3.0 V |
| Ignition switch ON | 11 to 14 V | |||
| C12-20 (M-) - C13-29 (ME01) | W - W-B | Throttle actuator operation signal (negative terminal) | Idling with warm engine | Pulse generation (see waveform 8) |
| C12-19 (M+) - C13-29 (ME01) | B - W-B | Throttle actuator operation signal (positive terminal) | Idling with warm engine | Pulse generation (see waveform 9) |
| C12-5 (ACIS) - C13-12 (E1) | G - BR | Intake air control valve assembly (for acoustic control induction system) operation signal | Ignition switch ON | 11 to 14 V |
| C12-10 (PRG) - C13-12 (E1) | L - BR | Purge VSV operation signal | Ignition switch ON | 11 to 14 V |
| Idling with warm engine, under purge control | Pulse generation (see waveform 10) |
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| C13-12 (E1) - Body ground | BR - - | Ground circuit of ECM | Always | Below 1 Ω |
| C12-2 (#40) - C13-23 (E01) | W - W-B | No. 4 fuel injector assembly signal | Ignition switch ON | 11 to 14 V |
| Idling with warm engine | Pulse generation (see waveform 11) |
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| C12-1 (#20) - C13-23 (E01) | G - W-B | No. 2 fuel injector assembly signal | Ignition switch ON | 11 to 14 V |
| Idling with warm engine | Pulse generation (see waveform 11) |
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| C12-3 (#60) - C13-23 (E01) | Y - W-B | No. 6 fuel injector assembly signal | Ignition switch ON | 11 to 14 V |
| Idling with warm engine | Pulse generation (see waveform 11) |
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| C12-8 (#50) - C13-23 (E01) | L - W-B | No. 5 fuel injector assembly signal | Ignition switch ON | 11 to 14 V |
| Idling with warm engine | Pulse generation (see waveform 11) |
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| C12-7 (#30) - C13-23 (E01) | V - W-B | No. 3 fuel injector assembly signal | Ignition switch ON | 11 to 14 V |
| Idling with warm engine | Pulse generation (see waveform 11) |
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| C12-6 (#10) - C13-23 (E01) | L - W-B | No. 1 fuel injector assembly signal | Ignition switch ON | 11 to 14 V |
| Idling with warm engine | Pulse generation (see waveform 11) |
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| C13-29 (ME01) - Body ground | W-B - - | Ground circuit of ECM | Always | Below 1 Ω |
| C13-6 (+BM) - C13-12 (E1) | W - BR | Power source of throttle actuator | Always | 11 to 14 V |
| C15-23 (NSW) - C13-12 (E1) | L - BR | Park/Neutral position switch assembly signal | Ignition switch ON and shift lever in P or N | Below 1 V |
| Ignition switch ON and shift lever not in P or N | 11 to 14 V | |||
| C15-16 (NE+) - C15-17 (NE-) | B - W | Crankshaft position sensor signal | Idling with warm engine | Pulse generation (see waveform 12) |
| C15-4 (VV2+) - C15-5 (VV2-) | Y - L | VVT sensor (for intake camshaft of bank 2) signal | Idling with warm engine | Pulse generation (see waveform 12) |
| C15-10 (VV1+) - C15-11 (VV1-) | R - G | VVT sensor (for intake camshaft of bank 1) signal | Idling with warm engine | Pulse generation (see waveform 12) |
| C14-11 (KNK1) - C14-12 (EKNK) | B - W | Knock control sensor (bank 1) signal | Engine speed maintained at 4000 rpm after warming up engine | Pulse generation (see waveform 13) |
| C14-5 (KNK2) - C14-6 (EKN2) | R - G | Knock control sensor (bank 2) signal | Engine speed maintained at 4000 rpm after warming up engine | Pulse generation (see waveform 13) |
| C14-17 (THA) - C13-4 (ETHW) | B - BR | Intake air temperature sensor signal | Idling, intake air temperature 0 to 80°C (32 to 176°F) | 0.5 to 3.4 V |
| C15-14 (VG) - C14-18 (E2G) | W - R | Mass air flow meter sub-assembly signal | Idling, shift lever in P or N, A/C switch off | 0.5 to 3.0 V |
| C14-1 (A2A+) - C13-12 (E1) | G - BR | Air fuel ratio sensor (bank 2 sensor 1) signal | Ignition switch ON | 3.3 V* |
| C14-7 (A1A+) - C13-12 (E1) | B - BR | Air fuel ratio sensor (bank 1 sensor 1) signal | Ignition switch ON | 3.3 V* |
| C14-9 (OX1B) - C14-10 (EX1B) | W - B | Heated oxygen sensor (bank 1 sensor 2) signal | Engine speed maintained at 2500 rpm for 2 minutes after warming up engine | Pulse generation (see waveform 14) |
| C14-23 (IGF1) - C13-12 (E1) | GR - BR | Ignition coil assembly (ignition confirmation signal) | Ignition switch ON | 4.5 to 5.5 V |
| Idling with warm engine | Pulse generation (see waveform 15) |
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| C14-27 (IGT5) - C13-12 (E1) | W - BR | No. 5 ignition coil assembly (ignition signal) | Idling with warm engine | Pulse generation (see waveform 15) |
| C14-25 (IGT3) - C13-12 (E1) | G - BR | No. 3 ignition coil assembly (ignition signal) | Idling with warm engine | Pulse generation (see waveform 15) |
| C13-27 (IGT1) - C13-12 (E1) | R - BR | No. 1 ignition coil assembly (ignition signal) | Idling with warm engine | Pulse generation (see waveform 15) |
| C12-15 (GE01) - C13-12 (E1) | - - BR | Shielded ground circuit of throttle actuator | Always | Below 1 Ω |
| C15-12 (VCV1) - C13-12 (E1) | W - BR | Power source for sensors (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| C13-5 (THW) - C13-4 (ETHW) | R - BR | Engine coolant temperature sensor signal | Idling, engine coolant temperature 60 to 120°C (140 to 248°F) | 0.2 to 1.0 V |
| C13-2 (VCTA) - C13-3 (ETA) | Y - L | Power source for throttle position sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| C13-9 (VTA2) - C13-3 (ETA) | LG - L | Throttle position sensor signal (for sensor malfunction detection) | Ignition switch ON, accelerator pedal fully released | 2.1 to 3.1 V |
| Ignition switch ON, accelerator pedal fully depressed | 4.6 to 5.0 V | |||
| C13-1 (VTA1) - C13-3 (ETA) | B - L | Throttle 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 | 3.2 to 4.8 V | |||
| C14-2 (A2A-) - C13-12 (E1) | R - BR | Air fuel ratio sensor (bank 2 sensor 1) signal | Ignition switch ON | 2.9 V* |
| C14-8 (A1A-) - C13-12 (E1) | W - BR | Air fuel ratio sensor (bank 1 sensor 1) signal | Ignition switch ON | 2.9 V* |
| C14-3 (OX2B) - C14-4 (EX2B) | L - Y | Heated oxygen sensor (bank 2 sensor 2) signal | Engine speed maintained at 2500 rpm for 2 minutes after warming up engine | Pulse generation (see waveform 14) |
| C14-28 (IGT6) - C13-12 (E1) | Y - BR | No. 6 ignition coil assembly (ignition signal) | Idling with warm engine | Pulse generation (see waveform 15) |
| C14-26 (IGT4) - C13-12 (E1) | B - BR | No. 4 ignition coil assembly (ignition signal) | Idling with warm engine | Pulse generation (see waveform 15) |
| C13-28 (IGT2) - C13-12 (E1) | L - BR | No. 2 ignition coil assembly (ignition signal) | Idling with warm engine | Pulse generation (see waveform 15) |
| C15-29 (LIN) - C13-12 (E1) | P - BR | LIN communication signal | Ignition switch ON | Pulse generation |
| C15-6 (VCV2) - C13-12 (E1) | B - BR | Power source for sensors (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| G87-9 (PSW) - C13-12 (E1) | G - BR | Power steering oil pressure switch | While turning steering wheel | Below 1.5 V |
| G87-11 (ELS2) - C13-12 (E1) | B - BR | Electric load | Defogger ON | 7.5 to 14 V |
| Defogger OFF | Below 1.5 V | |||
| G88-11 (ADJ1) - Body ground | W-B - - | Vehicle type designation wire harness | Always | Below 1 Ω |
*: The ECM terminal voltage is constant regardless of the output voltage from the sensor.
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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 Driving at 20 km/h (12 mph) Tech Tips
The wavelength becomes shorter as the vehicle speed increases.
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WAVEFORM 2
*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 Ignition switch ON Tech Tips
The waveform varies depending on the CAN communication signal.
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WAVEFORM 3
*a 5 V/DIV. *b 2 ms./DIV. Engine Speed 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 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 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 Ignition switch ON Tech Tips
The waveform varies depending on the CAN communication signal.
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WAVEFORM 6
*a 5 V/DIV. *b 1 ms./DIV. Camshaft Timing Oil Control Valve Assembly (for Intake Camshaft) Operation Signal ECM Terminal Name Between OC1+ and OC1-, or OC2+ and OC2- Tester Range 5 V/DIV., 1 ms./DIV. Condition Idling -
WAVEFORM 7
*a 5 V/DIV. *b 10 ms./DIV. Air Fuel Ratio Sensor (Sensor 1) Heater Operation Signal ECM Terminal Name Between HA1A and E04, or HA2A and E05 Tester Range 5 V/DIV., 10 ms./DIV. Condition Idling with cold engine -
WAVEFORM 8
*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 9
*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 10
*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 11
*1 20 V/DIV. *2 20 ms./DIV. No. 1 (to No. 6) Fuel Injector Assembly Signal ECM Terminal Name Between #10 (to #60) and E01 Tester Range 20 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 20 ms./DIV. Crankshaft Position Sensor Signal and VVT Sensor (for Intake Camshaft) Signal ECM Terminal Name Between NE+ and NE-
Between VV1+ and VV1-
Between VV2+ and VV2-
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 13
*a 1 V/DIV. *b 1 ms./DIV. Knock Control Sensor Signal ECM Terminal Name Between KNK1 and EKNK, or KNK2 and EKN2 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 differ slightly depending on the vehicle condition.
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WAVEFORM 14
*1 0.2 V/DIV. *2 200 ms./DIV. Heated Oxygen Sensor (Sensor 2) Signal ECM Terminal Name Between OX1B and EX1B, or OX2B and EX2B 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
In the Data List, item O2S B1S2 and O2S B2S2 shows the ECM values from the heated oxygen sensor.
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WAVEFORM 15
*a 2 V/DIV. *b 20 ms./DIV. Ignition Coil Assembly Signal (IGT and IGF1 Signal) ECM Terminal Name Between IGT (1 to 6) and E1
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.