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.
2012 Lexus IS 350 Base, RWDFACTORY OEM SERVICE PROCEDURE
Service Data
| Fuel pressure | 196 to 588 kPa (2 to 6 kgf/cm2 , 28 to 85 psi) | |
| Fuel pressure : at fuel pressure remains for 5 minutes after engine has stopped | 147 kPa (1.5 kgf/cm2 , 21 psi) or more | |
| Fuel pressure (for high pressure) : at engine warm up and idle | 3.5 to 4.5 MPa (35.7 to 45.9 kgf/cm2 , 508 to 653 psi) | |
| Fuel injector (for port injection) | ||
| Resistance | at 20°C (68°F) | 11.6 to 12.4 Ω |
| Injection volume | 72.3 to 75.2 cm3 (4.4 to 4.6 cu in.) per 15 seconds | |
| Fuel drop | 1 drop or less per 24 minutes | |
| Fuel Injector (for direct injection) | ||
| Resistance | at 20°C (68°F) | 2.01 to 2.31 Ω |
| Fuel pressure sensor | ||
| voltage | Terminal 2 and 1 : Apply 5 V between terminals 3 and 1 |
0.5 V |
| Fuel pump | ||
| Resistance | at 20°C (68°F) | 0.2 to 3.0 Ω |
| Fuel pump (for high pressure) | ||
| Resistance | at 20°C (68°F) | 1.19 to 1.39 Ω |
| Fuel pump resistor | ||
| Resistance | at 20°C (68°F) | 0.30 to 0.34 Ω |
| Fuel sender gauge assembly (Main) | ||
| Resistance | Float Level F | 6.5 to 8.5 Ω |
| Float Level Between E and F | 6.5 to 242.6 (Gradually changes) | |
| Float Level E | 237.6 to 242.6 Ω | |
| Fuel sender gauge assembly (Sub) | ||
| Resistance | Float Level F | 6.5 to 8.5 Ω |
| Float Level Between E and F | 6.5 to 171.9 (Gradually changes) | |
| Float Level E | 167.9 to 171.9 Ω | |
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.
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