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.
2004 Lexus RX 330 AWDFACTORY OEM SERVICE PROCEDURE
Service Data
Identifying Engine Control Service Data
| Throttle body | ||
| Standard throttle valve opening percentage | 60 % or more | |
| Accelerator pedal position sensor | ||
| Standard voltage | 0.6 to 1.0 V | |
| Intake air flow meter assy | ||
| Resistance | THA (4) - E2 (5) | |
| at -20°C (-4°F) | 13.6 to 18.4 kΩ | |
| at 20°C (68°F) | 2.21 to 2.69 kΩ | |
| at 60°C (140°F) | 0.493 to 0.667 kΩ | |
| Camshaft timing oil control valve assy | ||
| Resistance | at 20°C (68°F) | 6.9 to 7.9 Ω |
| Accelerator pedal rod assy | ||
| Resistance | VPA2 (3) - EP1 (5) | 5.0 kΩ or less |
| VPA1 (6) - EP2 (2) | 5.0 kΩ or less | |
| VCP1 (4) - EP1 (5) | 2.25 to 4.75 kΩ | |
| VCP2 (1) - EP2 (2) | 2.25 to 4.75 kΩ | |
| Throttle body assy | ||
| Resistance | at 20°C (68°F) | |
| M+ (2) - M- (1) | 0.3 to 100 kΩ | |
| VC (5) - E2 (3) | 1.2 to 3.2 kΩ | |
| E.F.I, engine coolant temperature sensor | ||
| Resistance | Approx. 20°C (68°F) | 2.32 to 2.59 kΩ |
| Approx. 80°C (176°F) | 0.310 to 0.326 kΩ | |
| Knock sensor | ||
| Resistance | at 20°C (68°F) | 120 to 280 kΩ |
| EFI relay | ||
| Specified condition | 1 - 2 | Continuity |
| 3 - 5 | No continuity Continuity (Applying battery voltage terminals 1 and 2) |
|
| Circut opening relay | ||
| Specified condition | 1 - 2 | Continuity |
| 3 - 5 | No continuity Continuity(Applying battery voltage terminals 1 and 2) |
|
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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