Parts for your 2020 Toyota Rav4-Temperature sensors

2020 Toyota RAV4 temperature sensors — what they do and how to look after them

Based on Toyota’s own technical literature for the 2020 RAV4 — including the Repair Manual (Engine/Hybrid System and Air Conditioning sections), the Electrical Wiring Diagram (EWD), and the New Car Features (NCF) guide — temperature sensors are absolutely fitted and actively used. These documents outline multiple thermistors and temperature-sensing elements monitored by the engine control module (ECM), transmission control, air‑conditioning amplifier, and (on Hybrid models) the battery ECU.

On this RAV4, temperature sensors help the car warm up smoothly, keep the engine and transmission happy, manage cabin comfort, and protect hybrid components. They constantly feed live data so the control units can trim fuel, time ignition, switch the radiator fans, fine‑tune A/C performance, and, in hybrids, keep the high‑voltage battery in its safe operating window.

• Engine Coolant Temperature (ECT): Anchors cold‑start fuelling, fan control, and overheat protection.
• Intake Air Temperature (IAT): Usually built into the MAF sensor, adjusts fuelling with changing air temps.
• Ambient Air Temperature: Feeds the dash display and A/C logic