Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSLEXUS2004IS 300 BASE, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESPECIFICATIONSSFI SYSTEMSERVICE DATA
2004 Lexus IS 300 Base, Automatic
Service Data
2004 Lexus IS 300 Base, AutomaticSECTION Service Data
SFI COMPONENTS SERVICE SPECIFICATION
| Fuel pump | Resistance: at 20°C (68°F) | 0.2 - 3.0 ohm |
| Fuel pressure regulator | Fuel pressure | 304 - 343 kPa (3.1 - 3.5 kgf/cm2 , 44 - 50 psi) |
| Injector | Resistance: at 20°C (68°F) Injection volume Difference between each cylinder Fuel leakage |
13.4 - 14.2 ohm 60 - 73 cm3 (3.7 - 4.5 cu in.) per 15 sec. 13 cm3 (0.8 cu in.) or less 1 drop or less per 12 min. |
| MAF meter | Resistance (THA - E2): at -20°C (-4°F) at 20°C (68°F) at 60°C (140°F) |
13.6 - 18.4kohm 2.21 - 2.69 kohm 0.493 - 0.667 kohm |
| Throttle body | Throttle body fully closed angle | 3.5° |
| Throttle control motor | Motor (M+ - M-): at 20°C (68°F) Clutch (CL+ - CL-): at 20°C (68°F) |
0.3 - 100 ohm 4.2 - 5.2 ohm |
| Throttle position sensor | Resistance (VC - E2): at 20°C (68°F) Throttle valve opening percentage: STD |
1.2 - 3.2 kohm 14.8 +/- 0.8% |
| Accelerator pedal position sensor | Resistance (VC - E2): at 20°C (68 °F) Accelerator pedal position voltage: STD |
1.2 - 3.2 kohm 0.3 - 0.9 V |
| Camshaft timing oil control valve | Resistance: at 20°C (68°F) | 5.5 - 12 ohm |
| Fuel pump resister | Resistance: at 20°C (68°F) | 0.30 - 0.35 ohm |
| VSV for EVAP | Resistance: at 20°C (68°F) | 27 - 33 ohm |
| VSV for ACIS | Resistance: at 20°C (68°F) | 38.5 - 44.5 ohm |
| VSV for CCV | Resistance: at 20°C (68°F) | 24 - 30 ohm |
| VSV for pressure switching valve | Resistance: at 20°C (68°F) at 120°C (248°F) |
37 - 44 ohm 51 - 62 ohm |
| ECT sensor | Resistance: at -20°C (-4°F) 0°C (32°F) 20°C (68°F) 40°C (104°F) 60°C (140°F) 80°C (176°F) |
10 - 20 kohm 4 - 7 kohm 2 - 3 kohm 0.9 - 1.3 kohm 0.4 - 0.7 kohm 0.2 - 0.4 kohm |
| Vapor pressure sensor | Power source voltage | 4.5 - 5.5 V |
| Heated oxygen sensor | Heater coil resistance: at 20°C (68°F) at 800°C (1,472°F) |
11 - 16ohm 23 - 32 ohm |
| Fuel cut rpm | Fuel return rpm | 1,000 rpm |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.