Lexus IS250 IS220d GSE20 ALE20 4GR-FSE ENGINE CONTROL SYSTEM
SFI SYSTEM - TERMINALS OF ECM
- HINT:
- 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, displayed in the Specified Condition column. The illustration above can be used as a reference to identify the ECM terminal locations.
| Symbols (Terminal No.) | Wiring Color | Terminal Description | Condition | Specified Condition |
| BATT (A5-4) - E1 (E4-7) | L - BR | Battery (for measuring battery voltage and for ECM memory) | Always | 9 to 14 V |
| +BM (E3-5) - E1 (E4-7) | P - BR | Power source of throttle motor | Always | 9 to 14 V |
| IGSW (A5-17) - E1 (E4-7) | B-W - BR | Engine switch | Engine switch on (IG) | 9 to 14 V |
| +B (A5-6) - E1 (E4-7) | B-R - BR | Power source of ECM | Engine switch on (IG) | 9 to 14 V |
| +B1 (A5-5) - E1 (E4-7) | B-R - BR | Power source of ECM | Engine switch on (IG) | 9 to 14 V |
| OC1+ (E3-34) - OC1- (E3-33) | W - L | Camshaft timing oil control valve (OCV) (Intake side (bank 1)) | Engine switch on (IG) | Pulse generation (see waveform 1) |
| OC2+ (E5-9) - OC2- (E5-8) | P - R | Camshaft timing oil control valve (OCV) (Intake side (bank 2)) | Engine switch on (IG) | Pulse generation (see waveform 1) |
| OE1+ (E3-9) - OE1- (E3-8) | R - Y | Camshaft timing oil control valve (OCV) (Exhaust side (bank 1)) | Engine switch on (IG) | Pulse generation (see waveform 1) |
| OE2+ (E5-24) - OE2- (E5-23) | W - R | Camshaft timing oil control valve (OCV) (Exhaust side (bank 2)) | Engine switch on (IG) | Pulse generation (see waveform 1) |
| MREL (A5-13) - E1 (E4-7) | Y - BR | EFI MAIN relay | Engine switch on (IG) | 9 to 14 V |
| VC (E3-29) - E2 (E3-28) | LG - BR | Power source for sensors (specific voltage) | Engine switch on (IG) | 4.5 to 5.0 V |
| VC2 (E5-29) - E3 (E5-30) | L - BR | Power source for sensors (specific voltage) | Engine switch on (IG) | 4.5 to 5.0 V |
| VG (E5-27) - E2G (E5-26) | G - V | Mass air flow meter | Idling, Shift lever position P or N, A/C switch OFF | 0.5 to 3.0 V |
| THA (E5-25) - E3 (E5-30) | L - BR | Intake air temperature sensor | Idling, Intake air temperature 20°C (68°F) | 0.5 to 3.4 V |
| THW (E5-20) - E2 (E3-28) | Y - BR | Engine coolant temperature sensor | Idling, Engine coolant temperature 80°C (176°F) | 0.2 to 1.0 V |
| VTA1 (E3-23) - E3 (E5-30) | LG - BR | Throttle position sensor (for engine control) | Engine switch on (IG), Throttle valve fully closed | 0.5 to 1.2 V |
| VTA1 (E3-23) - E3 (E5-30) | LG - BR | Throttle position sensor (for engine control) | Engine switch on (IG), Throttle valve fully open | 3.2 to 4.8 V |
| VTA2 (E3-22) - E3 (E5-30) | P - BR | Throttle position sensor (for sensor malfunction detection) | Engine switch on (IG), Accelerator pedal released | 2.1 to 3.1 V |
| VTA2 (E3-22) - E3 (E5-30) | P - BR | Throttle position sensor (for sensor malfunction detection) | Engine switch on (IG), Accelerator pedal depressed | 4.5 to 5.0 V |
| VPA (A6-33) - EPA (A6-34) | G-W - L-Y | Accelerator pedal position sensor (for engine control) | Engine switch on (IG), Accelerator pedal released | 0.5 to 1.1 V |
| VPA (A6-33) - EPA (A6-34) | G-W - L-Y | Accelerator pedal position sensor (for engine control) | Engine switch on (IG), Accelerator pedal depressed | 2.6 to 4.5 V |
| VPA2 (A6-32) - EPA2 (A6-26) | P-L - G-B | Accelerator pedal position sensor (for sensor malfunctioning detection) | Engine switch on (IG), Accelerator pedal released | 1.2 to 2.0 V |
| VPA2 (A6-32) - EPA2 (A6-26) | P-L - G-B | Accelerator pedal position sensor (for sensor malfunctioning detection) | Engine switch on (IG), Accelerator pedal depressed | 3.4 to 5.0 V |
| VCPA (A6-35) - EPA2 (A6-26) | P - G-B | Power source of accelerator pedal position sensor (for VPA) | Engine switch on (IG) | 4.5 to 5.0 V |
| VCP2 (A6-27) - EPA2 (A6-26) | G-R - G-B | Power source of accelerator pedal position sensor (for VPA2) | Engine switch on (IG) | 4.5 to 5.0 V |
| HA1A (E6-6) - E04 (E6-5) | V - W-B | A/F sensor heater | Idling | Below 3.0 V |
| HA2A (E6-4) - E05 (E6-3) | R - W-B | A/F sensor heater | Idling | Below 3.0 V |
| HA1A (E6-6) - E04 (E6-5) | V - W-B | A/F sensor heater | Engine switch on (IG) | 9 to 14 V |
| HA2A (E6-4) - E05 (E6-3) | R - W-B | A/F sensor heater | Engine switch on (IG) | 9 to 14 V |
| A1A+ (E6-18) - E1 (E4-7) | R - BR | A/F sensor | Engine switch on (IG) | 3.3 V* |
| A2A+ (E6-28) - E1 (E4-7) | B - BR | A/F sensor | Engine switch on (IG) | 3.3 V* |
| A1A- (E6-17) - E1 (E4-7) | G - BR | A/F sensor | Engine switch on (IG) | 3.0 V* |
| A2A- (E6-27) - E1 (E4-7) | W - BR | A/F sensor | Engine switch on (IG) | 3.0 V* |
| HT1B (A6-2) - E1 (E4-7) | L-R - BR | Heated oxygen sensor heater | Idling | Below 3.0 V |
| HT2B (A6-1) - E1 (E4-7) | L-W - BR | Heated oxygen sensor heater | Idling | Below 3.0 V |
| HT1B (A6-2) - E1 (E4-7) | L-R - BR | Heated oxygen sensor heater | Engine switch on (IG) | 9 to 14 V |
| HT2B (A6-1) - E1 (E4-7) | L-W - BR | Heated oxygen sensor heater | Engine switch on (IG) | 9 to 14 V |
| OX1B (A6-28) - O1B- (A6-29) | R - G | Heated oxygen sensor | Maintain engine speed at 2,500 rpm for 2 minutes after warming up sensor | Pulse generation (see waveform 2) |
| OX2B (A6-17) - O2B- (A6-18) | B - W | Heated oxygen sensor | Maintain engine speed at 2,500 rpm for 2 minutes after warming up sensor | Pulse generation (see waveform 2) |
| #10 (E3-15) - E1 (E4-7) #20 (E5-17) - E1 (E4-7) #30 (E3-14) - E1 (E4-7) #40 (E5-16) - E1 (E4-7) #50 (E3-13) - E1 (E4-7) #60 (E5-15) - E1 (E4-7) | R - BR GR - BR L - BR P - BR B - BR Y - BR | Injector | Engine switch on (IG) | 0 to 5 V |
| #10 (E3-15) - E1 (E4-7) #20 (E5-17) - E1 (E4-7) #30 (E5-14) - E1 (E4-7) #40 (E5-16) - E1 (E4-7) #50 (E3-13) - E1 (E4-7) #60 (E5-15) - E1 (E4-7) | R - BR GR - BR L - BR P - BR B - BR Y - BR | Injector | Idling | Pulse generation (see waveform 3) |
| KNK1 (E4-28) - EKNK (E4-30) | B - W | Knock sensor | Maintain engine speed at 4,000 after warming up | Pulse generation (see waveform 4) |
| KNK2 (E4-29) - EKN2 (E4-31) | R - G | Knock sensor | Maintain engine speed at 4,000 after warming up | Pulse generation (see waveform 4) |
| VV1+ (E3-21) - VV1- (E3-20) | Y - P | Variable valve timing (VVT) sensor (Intake side (bank 1)) | Idling | Pulse generation (see waveform 5) |
| VV2+ (E3-19) - VV2- (E3-18) | GR - W | Variable valve timing (VVT) sensor (Intake side (bank 2)) | Idling | Pulse generation (see waveform 5) |
| NE+ (E3-32) - NE- (E3-31) | R - G | Crankshaft position sensor | Idling | Pulse generation (see waveform 5, 6) |
| EV1+ (E5-19) - EV1- (E5-18) | W - G | Variable valve timing (VVT) sensor (Exhaust side (bank 1)) | Idling | Pulse generation (see waveform 6) |
| EV2+ (E6-13) - EV2- (E6-12) | W - B | Variable valve timing (VVT) sensor (Exhaust side (bank 2)) | Idling | Pulse generation (see waveform 6) |
| IGT1 (E5-13) - E1 (E4-7) IGT2 (E3-17) - E1 (E4-7) IGT3 (E5-10) - E1 (E4-7) IGT4 (E5-12) - E1 (E4-7) IGT5 (E3-27) - E1 (E4-7) IGT6 (E3-26) - E1 (E4-7) | GR - BR G - BR B - BR L - BR B - BR BR - BR | Ignition coil (ignition signal) | Idling | Pulse generation (see waveform 7) |
| IGF1 (E5-7) - E1 (E4-7) IGF2 (E5-6) - E1 (E4-7) | G - BR B - BR | Ignition coil (ignition confirmation signal) | Engine switch on (IG) | 4.5 to 5.0 V |
| IGF1 (E5-7) - E1 (E4-7) IGF2 (E5-6) - E1 (E4-7) | G - BR B - BR | Ignition coil (ignition confirmation signal) | Idling | Pulse generation (see waveform 7) |
| PRG (E3-11) - E1 (E4-7) | W - BR | VSV for EVAP | Engine switch on (IG) | 9 to 14 V |
| PRG (E3-11) - E1 (E4-7) | W - BR | VSV for EVAP | Idling | Pulse generation (see waveform 8) |
| SPD (A5-22) - E1 (E4-7) | Y-G - BR | Speed signal from combination meter | Engine switch on (IG), Rotate driving wheel slowly | Pulse generation (see waveform 9) |
| STA (A5-12) - E1 (E4-7) | R - BR | Starter signal | Cranking | 9 to 14 V |
| STAR (E4-4) - E1 (E4-7) | L - BR | Park/neutral position switch signal | Engine switch on (IG), Other shift position in P or N | 9 to 14 V |
| STAR (E4-4) - E1 (E4-7) | L - BR | Park/neutral position switch signal | Cranking, Shift position in P or N | 0 to 3.0 V |
| STSW (A5-19) - E1 (E4-7) | Y-B - BR | Engine switch signal | Shift lever position P or N, engine switch START | 6.0 V or more |
| STP (A6-4) - E1 (E4-7) | R-B - BR | Stop light switch | Brake pedal depressed | 7.5 to 14 V |
| STP (A6-4) - E1 (E4-7) | R-B - BR | Stop light switch | Brake pedal released | Below 1.5 V |
| ST1- (A5-8) - E1 (E4-7) | G-W - BR | Stop light switch (opposite to STP terminal) | Engine switch on (IG), Brake pedal depressed | Below 1.5 V |
| ST1- (A5-8) - E1 (E4-7) | G-W - BR | Stop light switch (opposite to STP terminal) | Engine switch on (IG), Brake pedal released | 7.5 to 14 V |
| M+ (E3-2) - ME01 (E3-4) | B - W-B | Throttle actuator | Idling with warm engine | Pulse generation (see waveform 10) |
| M- (E3-1) - ME01 (E3-4) | W - W-B | Throttle actuator | Idling with warm engine | Pulse generation (see waveform 11) |
| FC (A5-14) - E1 (E4-7) | R-G - BR | Fuel pump control | Engine switch on (IG) | 9 to 14 V |
| FC (A5-14) - E1 (E4-7) | R-G - BR | Fuel pump control | Idling | 0 to 3 V |
| FPR (A5-15) - E1 (E4-7) | B-Y - BR | Fuel pump control | Cranking | 9 to 14 V |
| FPR (A5-15) - E1 (E4-7) | B-Y - BR | Fuel pump control | Idling | 9 to 14 V |
| W (A6-8) - E1 (E4-7) | R-L - BR | MIL | Engine switch on (IG) | Below 3.0 V |
| W (A6-8) - E1 (E4-7) | R-L - BR | MIL | Idling | 0 to 3 V |
| TC (A6-3) - E1 (E4-7) | V - BR | Terminal TC of DLC 3 | Engine switch on (IG) | 9 to 14 V |
| TACH (A6-16) - E1 (E4-7) | R-W - BR | Engine speed | Idling | Pulse generation (see waveform 12) |
| ACIS (E5-3) - E1 (E4-7) | Y - BR | Intake air control valve actuator | Engine switch on (IG) | 9 to 14 V |
| ACIS (E5-3) - E1 (E4-7) | Y - BR | Intake air control valve actuator | Engine RPM is 2,400 to 4,000 rpm and throttle opening percentage is 40 % or more | 0 to 3 V |
| INJF (E6-26) - E1 (E4-7) | BR - BR | Injector injection confirmation signal | Idling | Pulse generation (see waveform 13) |
| FPF1 (E6-32) - E1 (E4-7) | W - BR | High pressure side fuel pump (spill valve) | Idling | Pulse generation (see waveform 14) |
| FPD (E6-33) - E1 (E4-7) | G - BR | High pressure side fuel pump (spill valve) | Idling | Pulse generation (see waveform 14) |
| PR (E6-25) - E2 (E3-28) | R - BR | Fuel pressure sensor | Idling | 1.8 to 2.3 V |
| IAC1 (E6-31) - E1 (E4-7) | G - BR | SCV position sensor | Engine switch off to on (IG) | 3.0 to 4.0 V |
| IA1+ (E6-2) - E01 (E5-2) | L - W-B | DC motor for SCV | Idling | Pulse generation (see waveform 15) |
| IA1- (E6-1) - E01 (E5-2) | W - W-B | DC motor for SCV | Idling | Pulse generation (see waveform 16) |
| CANH (A5-25) - E1 (E4-7) | B - BR | CAN communication line | Engine switch on (IG) | Pulse generation (see waveform 17) |
| CANL (A5-24) - E1 (E4-7) | W - BR | CAN communication line | Engine switch on (IG) | Pulse generation (see waveform 18) |
- HINT:
- *: The ECM terminal voltage is constant regardless of the output voltage from the sensor.
| WAVEFORM 1 |
| Item | Content |
| Symbols (Terminal No.) | OC1+ (E3-34) - OC1- (E3-33) OC2+ (E5-9) - OC2- (E5-8) OE1+ (E3-9) - OE1- (E3-8) OE2+ (E5-24) - OE2- (E5-23) |
| Tool setting | 5 V/DIV., 1 ms./DIV. |
| Condition | Idling |
- HINT:
- The wavelength becomes shorter as the engine rpm increases.
| WAVEFORM 2 |
| Item | Content |
| Symbols (Terminal No.) | OX1B (A6-28) - O1B- (A6- 29) OX2B (A6-17) - O2B- (A6- 18) |
| Tool setting | 0.2 V/DIV., 200 ms./DIV. |
| Condition | Engine speed maintained at 2,500 rpm for 2 minutes after warming up engine |
- HINT:
- In the Data List, item O2S B1 S2 shows the ECM input values from the heated oxygen sensor.
| WAVEFORM 3 |
| Item | Content |
| Symbols (Terminal No.) | #10 (E3-15) - E1 (E4-7) #20 (E5-17) - E1 (E4-7) #30 (E3-14) - E1 (E4-7) #40 (E5-16) - E1 (E4-7) #50 (E3-13) - E1 (E4-7) #60 (E5-15) - E1 (E4-7) |
| Tool setting | 2 V/DIV., 20 ms./DIV. |
| Condition | Idling |
- HINT:
- The wavelength becomes shorter as the engine rpm increases.
| WAVEFORM 4 |
| Item | Content |
| Symbols (Terminal No.) | KNK1 (E4-28) - EKNK (E4-30) KNK2 (E4-29) - EKN2 (E4- 31) |
| Tool setting | 0.01 to 10 V/DIV., 0.01 to 10 ms./DIV. |
| Condition | Engine speed maintained a 4,000 rpm after warming up engine |
- HINT:
The wavelength becomes shorter as the engine rpm increases.
The waveforms and amplitudes displayed differ slightly depending on the vehicle.
| WAVEFORM 5 |
| Item | Content |
| Symbols (Terminal No.) | NE+ (E3-32) - NE- (E3-31) VV1+ (E3-21) - VV1- (E3- 20) VV2+ (E3-19) - VV2- (E3- 18) |
| Tool setting | 5 V/DIV., 20 ms./DIV. |
| Condition | Idling |
- HINT:
- The wavelength becomes shorter as the engine rpm increases.
| WAVEFORM 6 |
| Item | Content |
| Symbols (Terminal No.) | NE+ (E3-32) - NE- (E3-31) EV1+ (E5-19) - EV1- (E5- 18) EV2+ (E6-13) - EV2- (E6-12) |
| Tool setting | 5 V/DIV., 20 ms./DIV. |
| Condition | Idling |
- HINT:
- The wavelength becomes shorter as the engine rpm increases.
| WAVEFORM 7 |
| Item | Content |
| Symbols (Terminal No.) | CH1: IGT1 (E5-13) - E1 (E4-7) CH1: IGT2 (E3-17) - E1 (E4-7) CH1: IGT3 (E5-10) - E1 (E4-7) IGT4 (E5-12) - E1 (E4-7) CH1: IGT5 (E3-27) - E1 (E4-7) CH1: IGT6 (E3-26) - E1 (E4-7) CH2: IGF1 (E5-7) - E1 (E4-7) CH2: IGF2 (E5-6) - E1 (E4-7) |
| Tool setting | 2 V/DIV., 20 ms./DIV. |
| Condition | Idling |
- HINT:
- The wavelength becomes shorter as the engine rpm increases.
| WAVEFORM 8 |
| Item | Content |
| Symbols (Terminal No.) | PRG (E3-11) - E1 (E4-7) |
| Tool setting | 5 V/DIV., 50 ms./DIV. |
| Condition | Idling |
- HINT:
- If the waveform is not similar to the illustration, check the waveform again after idling for 10 minutes or more.
| WAVEFORM 9 |
| Item | Content |
| Symbols (Terminal No.) | SPD (A5-22) - E1 (E4-7) |
| Tool setting | 2 V/DIV., 20 ms./DIV. |
| Condition | Driving at 20 km/h (12 mph) |
- HINT:
- The wavelength becomes shorter as the vehicle speed increases.
| WAVEFORM 10 |
| Item | Content |
| Symbols (Terminal No.) | M+ (E3-2) - ME01 (E3-4) |
| Tool setting | 5 V/DIV., 1 ms./DIV. |
| Condition | Idling with warm engine |
- HINT:
- The duty ratio varies depending on the throttle actuator operation.
| WAVEFORM 11 |
| Item | Content |
| Symbols (Terminal No.) | M- (E3-1) - ME01 (E3-4) |
| Tool setting | 5 V/DIV., 1 ms./DIV. |
| Condition | Idling with warm engine |
- HINT:
- The duty ratio varies depending on the throttle actuator operation.
| WAVEFORM 12 |
| Item | Content |
| Symbols (Terminal No.) | TACH (A6-16) - E1 (E4-7) |
| Tool setting | 5 V/DIV., 10 ms./DIV. |
| Condition | Idling |
- HINT:
- The wavelength becomes shorter as the engine rpm increases.
| WAVEFORM 13 |
| Item | Content |
| Symbols (Terminal No.) | CH1: #10 (E3-15) - E1 (E4-7) CH1: #20 (E5-17) - E1 (E4-7) CH1: #30 (E3-14) - E1 (E4-7) CH1: #40 (E5-16) - E1 (E4-7) CH1: #50 (E3-13) - E1 (E4-7) CH1: #60 (E5-15) - E1 (E4-7) CH2: INJF (E6-26) - E1 (E4-7) |
| Tool setting | 2 V/DIV., 20 ms./DIV. |
| Condition | Idling with warm engine |
- HINT:
- The wavelength becomes shorter as the engine rpm increases.
| WAVEFORM 14 |
| Item | Content |
| Symbols (Terminal No.) | CH1: FPD (E6-33) - E1 (E4-7) CH2: FPF1 (E6-32) - E1 (E4-7) |
| Tool setting | 2 V/DIV., 5 ms./DIV. |
| Condition | Idling with warm engine |
| WAVEFORM 15 |
| Item | Content |
| Symbols (Terminal No.) | IA1+ (E6-2) - E01 (E5-2) |
| Tool setting | 5 V/DIV., 1 ms./DIV. |
| Condition | Idling with warm engine |
| WAVEFORM 16 |
| Item | Content |
| Symbols (Terminal No.) | IA1- (E6-1) - E01 (E5-2) |
| Tool setting | 5 V/DIV., 1 ms./DIV. |
| Condition | Idling with warm engine |
| WAVEFORM 17 |
| Item | Content |
| Symbols (Terminal No.) | CANH (A5-25) - E1 (E4-7) |
| Tool setting | 1 V/DIV., 10 μs/DIV. |
| Condition | Stop engine and engine switch on (IG) |
- HINT:
- The waveform varies depending on the CAN communication signal.
| WAVEFORM 18 |
| Item | Content |
| Symbols (Terminal No.) | CANL (A5-24) - E1 (E4-7) |
| Tool setting | 1 V/DIV., 10 μs/DIV. |
| Condition | Stop engine and engine switch on (IG) |
- HINT:
- The waveform varies depending on the CAN communication signal.
LEXUS IS250, IS220d / GSE20 ALE20