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.
2012 Lexus IS 250C Automatic TransFACTORY OEM SERVICE PROCEDURE
Typical Enabling Conditions
| Monitor runs whenever following DTCs are not present | None |
| Time after engine start | 5 seconds or more |
| Injector driver relay | On |
| Output duty cycle | More than output duty ratio change map value*, and less than 95% |
| Battery voltage | 10.5 V or more |
| Engine switch | On (IG) |
| Starter | Off |
| *: Output duty ratio change map value | - |
| Engine speed is 500 RPM | 5% |
| Engine speed is 2000 RPM | 20% |
| Engine speed is 4000 RPM | 40% |
| Engine speed is 6000 RPM | 60% |
| Engine speed is 8000 RPM | 80% |
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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