MR2 L4-122 1998cc 2.0L DOHC Turbo (3S-GTE) (1991)
Coolant Temperature Sensor/Switch (For Computer): Description and Operation
Water Temperature Sensor (THW)
The Coolant Temperature Sensor monitors coolant temperature with a thermistor whose resistance varies according to engine temperature. The ECU
uses this signal to control open/closed loop operation of the fuel injection system, overdrive on electronic transaxles, spark advance (ESA), idle speed
control system and EGR system. The THW inputs the ECU through terminal THW.