Van Wagon 2WD L4-2237cc 2.2L (4Y-E) (1989)
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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.
