Silhouette V6-191 3.1L VIN D TBI (1995)
Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
A Tech 1 scan tool displays engine temperature in degrees centigrade. After the engine is started, the temperature should rise steadily to about
88-106°C (190-222°F) then stabilize when the thermostat opens. If the engine has not been run for several hours (overnight) the Engine Coolant
Temperature (ECT) and Intake Air Temperature (IAT) should read close to each other. A fault in the ECT sensor circuit should set a Diagnostic
Trouble Code (DTC) 14 or DTC 15. The DTC charts also contain a "Diagnostic Aid" chart to check for sensor resistance values relative to
temperature.
CAUTION: Care must be taken when handling sensor. Damage to sensor will affect proper operation of the fuel injection system.
