Subaru LEGACY 2002 Quick Reference Index page 203

C: ENGINE COOLANT TEMPERATURE SENSOR
The engine coolant temperature sensor is located on the engine coolant pipe. The sensor uses a
thermistor whose resistance changes inversely with temperature. Resistance signals as engine
coolant temperature information are transmitted to the ECM to make fuel injection, ignition timing,
purge control solenoid valve and other controls.
(1) Connector
(2) Thermistor element
SENSORS AND SWITCHES
(1)
(2)
2.5
1
–20 0 20
(–4) (32) (68)
FU-23
Fuel Injection (Fuel System)
20°C (68°F) 2.5kΩ
Temp. °C (°F)
40 60 80
(104) (140) (176)
S2H1113B