Laser FWD L4-1997cc 2.0L DOHC (1992)
Coolant Temperature Sensor/Switch (For Computer): Description and Operation
Coolant Temperature Switch
Coolant Temperature Switch Circuit (A/C Only)
PURPOSE
Allows the "A/C ON" signal to be transmitted to the ECU. Used to prevent engine overheating by eliminating A/C operation.
LOCATION
Mounted in the thermostat housing.
OPERATION
The Coolant Temperature Switch is a contact type switch. It is normally in the closed position. When the engine coolant temperature reaches 233 -
244° F (112 - 118° C) the switch will open interrupting the signal to the ECU, the ECU will then cut power to the A/C relay until engine
temperature drops below the 233 - 244° F (112 - 118° C) level.
