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.
2010 Lexus IS 250 AWDFACTORY OEM SERVICE PROCEDURE
Service Data
| VSC OFF switch | Resistance 3 (+) - 4 (E) | Switch is pushed in | Bellow 1 Ω |
| Switch is not pushed in | 10 kΩ or higher | ||
| Brake pedal load sensing switch | Resistance 2 (FSW+) - 1 (GND) | Brake pedal load sensing switch OFF (Brake pedal depressed) | 950 to 1050 Ω |
| Brake pedal load sensing switch ON (Brake pedal released) | 203 to 223 Ω | ||
| Stop light control relay | Resistance 3 - 4 | Voltage is not applied between terminals 1 and 2 | Bellow 1 Ω |
| Voltage is applied between terminals 1 and 2 | 10 kΩ or higher | ||
| Resistance 3 - 5 | Voltage is not applied between terminals 1 and 2 | 10 kΩ or higher | |
| Voltage is applied between terminals 1 and 2 | Bellow 1 Ω |
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.