Parts for your 2002 Toyota Hilux surf-Temperature sensors

2002 Toyota Hilux Surf temperature sensors — what they do and how to look after them

Temperature sensors are absolutely fitted to the 2002 Toyota Hilux Surf and they’re central to how it runs. Technical sources including Toyota Hilux Surf/4Runner Repair Manuals (for KZN185/RZN185/VZN185 and early 215 series), the Toyota Electrical Wiring Diagram (EWD), and Toyota engine control system manuals detail the Engine Coolant Temperature (ECT) sensor, Intake Air Temperature (IAT) sensor, Automatic Transmission Fluid (ATF) temperature sensor, and various HVAC temperature sensors. These documents show ECT labelled THW to the ECU, a separate sender for the dash gauge on many engines, ATF temp input for shift strategy, and ambient/evaporator sensors in climate models.

On this Hilux Surf, temperature sensors are the quiet achievers that let the ECU and other modules make smart decisions. The ECT sensor tells the engine how warm it is so it can adjust fuelling, ignition timing and idle speed