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.
2003 Lexus GX 470FACTORY OEM SERVICE PROCEDURE
Service Data
FUEL SERVICE DATA
| Fuel pressure | 265 - 304 kPa (2.7 - 3.1 kgf/cm2 , 38 - 44 psi) | |
| Fuel pressure | 147 kPa (1.5 kgf/cm2 , 21 psi) or more | |
| Fuel injector | ||
| Resistance | at 20°C (68°F) | 13.4 - 14.2ohm |
| Injection volume | 56 - 69 cm2 (3.4 - 4.2 cu in.) per 15 seconds | |
| Difference between each cylinder | 13 cm3 (0.8 cu in.) or less | |
| Fuel leakage | 1 drop or less per 12 minutes | |
| Fuel pump resister | ||
| Resistance | at 20°C (68°F) | 0.70 - 0.76 ohm |
| Fuel suction W/ Pump & gage tube assy | ||
| Resistance | at 20°C (68°F) | 0.2 - 3.0 ohm |
| Fuel pump relay assy | ||
| Specified condition | 1 - 2 3 - 4 3 - 5 |
Continuity Continuity No continuity |
Factory Service Tools
Use the Manual With the Right Hardware
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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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