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 LS 430FACTORY OEM SERVICE PROCEDURE
Service Data
WARNING: This page is about a different car, the 2005 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
1GR-FE:
Service Data - Emission Control (1GR-FE)
| VSV for charcoal canister | ||
| Resistance | at 20°C (68°F) | 25 -- 30 Ω |
| at 100°C (212°F) | 32 -- 42 Ω | |
| Vacuum switching valve assy No.1 | ||
| Resistance | at 20°C (68°F) | 26 to 30 Ω |
| Air fuel ratio sensor (Bank 1, Bank 2) | ||
| Resistance | 1 (HT) - 2 (+B) | 1.8 to 3.4 Ω at 20°C (68°F) |
| Resistance | 1 (HT) - 4 (AF-) | No continuity |
| Heated oxygen sensor No.2 (Bank 1, Bank 2) | ||
| Resistance | 1 (HT) - 2 (+B) | 11 to 16Ω at 20°C (68°F) |
| Resistance | 1 (HT) - 4 (E1) | No continuity |
| Vapor pressure sensor | ||
| Power source voltage | VC-E2 | 4.5 -- 5.5 V |
| Power output voltage | PTNK - E2 | 3.0 -- 3.6 V |
2UZ-FE:
Service Data - Emission Control (2UZ-FE)
| VSV for charcoal canister | ||
| Resistance | at 20°C (68°F) | 25 -- 30 Ω |
| at 100°C (212°F) | 32 -- 42 Ω | |
| VSV for EVAP | ||
| Resistance | at 20°C (68°F) | 26 -- 30 Ω |
| Heated oxygen sensor | ||
| Resistance | 1 (HT) - 2 (+B) | 11 -- 16 Ω at 20°C (68°F) |
| Resistance | 1 (HT) - 4 (E1) | No continuity |
| Heated oxygen sensor No. 2 (Bank 1) | ||
| Resistance | 1 (HT) - 2 (+B) | 11 -- 16 Ω at 20°C (68°F) |
| Resistance | 1 (HT) - 4 (E1) | No continuity |
| Heated oxygen sensor No. 2 (Bank 2) | ||
| Resistance | 1 (HT) - 2 (+B) | 11 -- 16 Ω at 20°C (68°F) |
| Resistance | 1 (HT) - 4 (E1) | No continuity |
| Pressure sennsor | ||
| Voltage | AIP-E2 | 1.0 to 2.2 V |
| Vacuum switchig valve assy | ||
| Resistance | 1 -- 2 | 33 to 39 Ω at 20°C (68°F) |
| 1 - Body ground | 10 MΩ or higher | |
| 2 - Body ground | 10MΩ or higher |
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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