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.
2009 Lexus IS FFACTORY OEM SERVICE PROCEDURE
Service Data
| Spark plug | Standard insulation resistance | 10 MΩor more |
| Recommended spark plug | FK20HBR11 (DENSO made) | |
| Maximum electrode gap | 1.4 mm (0.0551 in.) for used spark plug |
|
| Electrode gap | 1.0 to 1.1mm (0.0394 to 0.0433 in.) for new spark plug |
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| Camshaft timing oil control valve assembly | Resistance: 6.9 to 7.9 Ω at 20°C (68°F) |
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| Throttle body | 1 (M-) - 2 (M+) | Resistance: 0.3 to 100 Ω at 20°C (68°F) |
| Mass air flow meter | 1 (THA) - 2 (E2) | Resistance: 13.6 to 18.4 Ω at 20°C (68°F) |
| Resistance: 2.21 to 2.69 Ω at 20°C (68°F) |
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| Resistance: 0.49 to 0.67 Ω at 20°C (68°F) |
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| Engine coolant temperature sensor | 1 - 2 | Resistance: 2.32 k to 2.59 kΩ at 20°C (68°F) |
| Resistance: 0.310 k to 0.326 kΩ at 80°C (176°F) |
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| Knock sensor | 1 - 2 | Resistance: 120 to 280 kΩ at 20°C (68°F) |
| Air fuel ratio sensor (for sensor 1) |
1 (HT) - 2 (+B) | 1.8 to 3.4 Ω at 20°C (68°F) |
| Heated oxygen sensor (for sensor 2) |
1 (HT) - 2 (+B) | 11 to 16 Ω at 20°C (68°F) |
| EFI MAIN relay Integration relay |
2C-1 - 2A-8 | 10 kΩ or higher |
| 2C-1 - 2A-8 | Below 1 Ω (when battery voltage is applied to terminals 2A-6 and 2A-7) |
|
| EFI NO. 2 relay Integration relay |
2C-1 - 2B-4 | 10 kΩ or higher |
| 2C-1 - 2B-4 | Below 1 Ω (when battery voltage is applied to terminals 2B-2 and 2B-3) |
|
| INJ relay Integration relay |
2C-1 - 2A-4 | 10 kΩ or higher |
| 2C-1 - 2A-4 | Below 1 Ω (when battery voltage is applied to terminals 2A-2 and 2A-3) |
|
| C/OPN relay Integration relay |
2B-5 - 2B-8 | 10 kΩ or higher |
| 2B-5 - 2B-8 | Below 1 Ω (when battery voltage is applied to terminals 2B-6 and 2B-7) |
|
| IG2 relay | 3 - 5 | 10 kΩ or higher |
| 3 - 5 | Below 1 Ω (when battery voltage is applied to terminals 1 and 2) |
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| VVT LH relay | 3 - 5 | 10 kΩ or higher |
| 3 - 5 | Below 1 Ω (when battery voltage is applied to terminals 1 and 2) |
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| VVT RH relay | 3 - 5 | 10 kΩ or higher |
| 3 - 5 | Below 1 Ω (when battery voltage is applied to terminals 1 and 2) |
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| INJ2 relay | 3 - 5 | 10 kΩ or higher |
| 3 - 5 | Below 1 Ω (when battery voltage is applied to terminals 1 and 2) |
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| Air fuel ratio sensor relay | 3 - 5 | 10 kΩ or higher |
| 3 - 5 | Below 1 Ω (when battery voltage is applied to terminals 1 and 2) |
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| Fuel pump relay | 3 - 4 | Below 1 Ω |
| 3 - 4 | 10 kΩ or higher (when battery voltage is applied to terminals 1 and 2) |
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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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