Beretta V6-3100 3.1L VIN M SFI (1995)
Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
Engine Coolant Temperature Sensor
DIAGNOSIS
A Tech 1 scan tool displays engine temperature in degrees centigrade. After the engine is started, the temperature should rise steadily to about 90°
C (194°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.
NOTICE: Care must be taken when handling sensor. Damage to sensor will affect proper operation of the fuel injection system.
REMOVE OR DISCONNECT
1. Relieve coolant pressure.
2. Remove air intake duct.
3. Negative battery cable.
4. Disconnect electrical connector.
5. Carefully back out ECT sensor.
INSTALL OR CONNECT
1. Coat threads (only) with sealer PIN 9985253 or equivalent and torque to 23 Nm (17 lb. ft.).
2. Locking tab on sensor assembly must be located on the top of the sensor.
3. Reinstall electrical connector.
4. Re-install air duct.
5. Negative battery cable.
6. Refill lost coolant.
