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.
Typical Enabling Conditions
2009 Toyota Yaris S, 4D HatchbackSECTION Typical Enabling Conditions
ECT Sensor cold start monitor:
TYPICAL ENABLING CONDITIONS
| Monitor runs whenever following DTCs not present | None |
| Battery voltage | 10.5 V or more |
| Time after engine start | 1 second or more |
| ECT at engine start | Less than 60°C(140°F) |
| IAT sensor circuit (P0110, P0112, P0113) | OK |
| Soak time | 0 seconds or more |
| Accumulated MAF | 498.77 g or more |
| Engine | Running |
| Fuel cut | OFF |
| Difference between ECT at engine start and IAT | Less than 40°C (72°F) |
ECT Sensor soak monitor:
TYPICAL ENABLING CONDITIONS
| Monitor runs whenever following DTCs not present | None |
| Battery voltage | 10.5 V or more |
| Engine | Running |
| Soak time | 5 hours or more |
| IAT sensor circuit (P0110, P0112, P0113) | OK |
| Either (a) or (b) condition met | - |
| (a) ECT | 60°C (140°F) or more |
| (b) Accumulated MAF | 862.59 g or more |
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.