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.
2005 Lexus GS 300FACTORY OEM SERVICE PROCEDURE
Service Data
SFI Service Data
| Fuel pressure regulator | Fuel pressure | 301 - 347 kPa (3.1 - 3.5 kgf/cm2 , 44 - 50 psi) | |
| Fuel pump | Resistance | at 20°C (68°F) | 0.2 - 3.0 Ω |
| Injector | Resistance | at 20°C (68°F) | 13.4 - 14.2 Ω |
| Injection volume | 60 - 73 cm3 (3.7 - 4.5 cu in.) per 15 sec. | ||
| Difference between each cylinder | 13 cm3 (0.8 cu in.) or less | ||
| Fuel leakage | 1 drop or less per 12 minutes | ||
| MAF meter | Resistance (THA - E2) | at -20°C (-4°F) | 13.6 - 18.4 kΩ |
| at 20°C (68°F) | 2.21 - 2.69 kΩ | ||
| at 60°C (140°F) | 0.49 - 0.67 kΩ | ||
| Throttle body | Throttle body fully closed angle | 3.5° | |
| Throttle control motor | Motor (M+ - M-) | at 20°C (68°F) | 0.3 - 100 Ω |
| Clutch (CL+ - CL-) | at 20°C (68°F) | 4.2 - 5.2 Ω | |
| Throttle position sensor | Resistance (VC - E2) | at 20°C (68°F) | 1.2 - 3.2 kΩ |
| Throttle valve opening percentage | STD | 15.6 ± 1.2% | |
| Accelerator pedal position sensor | Resistance (VC - E2) | at 20°C (68°F) | 1.2 - 3.2 kΩ |
| Accelerator pedal position voltage | STD | 0.3 - 0.9 V | |
| Camshaft timing oil control valve | Resistance | at 20°C (68°F) | 5.5 - 12 Ω |
| VSV for EVAP | Resistance | at 20°C (68°F) | 33 - 39 Ω |
| VSV for acoustic control induction system (ACIS) | Resistance | at 20°C (68°F) | 38.5 - 44.5 Ω |
| VSV for canister closed valve (CCV) | Resistance | at 20°C (68°F) | 24 - 30 Ω |
| VSV for Pressure switching valve | Resistance | at 20°C (68°F) | 33 - 39 Ω |
| ECT sensor | Resistance | at -20°C (-4°F) | 10 - 20 kΩ |
| 0°C (32°F) | 4 - 7 kΩ | ||
| 20°C (68°F) | 2 - 3 kΩ | ||
| 40°C (104°F) | 0.9 - 1.3 kΩ | ||
| 60°C (140°F) | 0.4 - 0.7 kΩ | ||
| 80°C (176°F) | 0.2 -0.4 kΩ | ||
| Vapor pressure sensor | Power sorce voltage | 4.5 - 5.5 V | |
| Heated oxygen sensor | Heater coil resistance | at 20°C (68°F) | 11 - 16 Ω |
| Fuel cut rpm | Fuel return rpm | 1, 000 rpm | |
Factory Service Tools
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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.