Parts for your 2007 Toyota Blade-Temperature sensors

2007 Toyota Blade temperature sensors — what they do and how to look after them

Based on Toyota technical publications for the E150-series Auris/Blade (Repair Manual, New Car Features, and the Electrical Wiring Diagram), the 2007 Toyota Blade absolutely uses temperature sensors. These include the engine coolant temperature (ECT) sensor, intake air temperature (IAT) sensor, ambient air temperature sensor for the climate control, an evaporator temperature sensor, and a transmission or CVT fluid temperature sensor depending on powertrain. Diagnostic coverage for these is also reflected in Toyota’s Techstream data list and OBD‑II fault codes.

On this model, temperature sensors are the quiet achievers that keep things running sweet. The ECT sensor tells the engine ECU how warm the engine is so it can sort cold starts, fuel delivery, ignition timing, and radiator fan operation. The IAT sensor helps the ECU adjust fuelling based on air density. The ambient and evaporator sensors keep the air‑con from icing up and make sure cabin temps feel right. The ATF/CVT fluid temp sensor protects the transmission by managing shift strategy and thermal limits.

There’s no fixed replacement interval for these sensors, they’re serviced on condition. Typical giveaways of a crook temperature sensor include hard starting when cold, rough idle, poor fuel economy, radiator fans running at the wrong time, lazy A/C performance, or a check engine light. Common codes include P0115–P0119 or P0128 (ECT), P0110–P0113 (IAT), and P0711 (ATF temp).

• Diagnosis first: scan with an OBD‑II tool, compare live data against the Toyota spec chart in the Repair Manual.
• ECT replacement: work on a cold engine, safely drain/contain coolant below sensor level, swap the sensor and seal, then refill with Toyota Super Long Life Coolant (pink) and bleed the system. Follow the factory torque spec.
• IAT care: if it’s built into the MAF, a gentle clean with MAF‑safe cleaner can help. Don’t touch the sensing element and avoid harsh solvents.
• Connectors: check for corrosion or broken locks, clean with proper contact cleaner and ensure the weather seals are seated.
• Transmission/CVT temp sensor: often integrated, service may involve internal harness or valve body components—best tackled with the correct workshop info.

Kept in good nick, these sensors help the Blade start crisply, sip fuel sensibly, and keep both engine and gearbox happy across Aussie and Kiwi conditions. If in doubt, use the Toyota specs, the right fluids, and quality parts.

Popular questions about 2007 Toyota Blade temperature sensors

Where is the engine coolant temperature (ECT) sensor located?
On the 2.4-litre four-cylinder, the ECT sensor is typically near the thermostat housing/water outlet on the cylinder head. On the V6 Blade Master, it’s fitted near the coolant crossover/water outlet assembly. Access varies slightly by engine and trim, so a quick look at the factory diagram makes life easier.

Can temperature sensors be cleaned, or do they need replacing?
The ECT sensor is a sealed thermistor—if it’s faulty, replace it. The IAT (often integrated with the MAF) can sometimes be carefully cleaned with a dedicated MAF cleaner to remove light contamination. Transmission fluid temp sensors are usually internal, service may require replacing the internal harness or related assembly rather than just the sensor.

What fault codes point to temperature sensor issues?
Expect P0115–P0119 or P0128 for coolant temp concerns, P0110–P0113 for intake air temp, and P0711 for transmission fluid temp problems. If these appear, confirm with live data and resistance checks per the Toyota Repair Manual before replacing parts.