Engine Coolant Temperature Sensor - Chrysler Sebring 2004 Service Manual

JR
ENGINE BLOCK HEATER (Continued)
INSTALLATION
INSTALLATION - 2.0L/2.4L
(1) Thoroughly clean core hole and heater seat.
(2) Insert heater assembly with element loop posi-
tioned upward (Fig. 15).
(3) With heater seated, tighten center screw
securely to assure a positive seal.
CAUTION: To prevent damage, the power cord must
be secured in it's retaining clips, and not positioned
so it could contact linkages or exhaust manifold.
(4) Connect power cord to heater.
(5) Lower vehicle.
(6) Fill cooling system (Refer to 7 - COOLING/EN-
GINE - STANDARD PROCEDURE).
INSTALLATION - 2.7L
(1) Thoroughly clean cylinder block heater cavity.
(2) Insert heater assembly into block such that
mounting hole is located below heater terminals (Fig.
16).
(3) Install mounting screw and tighten to 12 N·m
(105 in. lb.).
CAUTION: To prevent damage, the power cord must
be secured in its retainer clips, and not positioned
so it could contact linkages or exhaust manifolds.
(4) Attach power cord to heater.
(5) Lower vehicle.
ENGINE COOLANT
TEMPERATURE SENSOR
DESCRIPTION
2.0L/2.4L ENGINE
The Engine Coolant Temperature (ECT) Sensor
threads into the thermostat housing just below the
coolant outlet connector (Fig. 17). The ECT Sensor is
a negative thermal coefficient sensor.
2.7L ENGINE
The Engine Coolant Temperature (ECT) Sensor
threads into the coolant outlet connector (Fig. 18).
The ECT Sensor is a negative thermal coefficient
sensor.
OPERATION
The ECT sensor provides an input to the PCM. As
temperature increases, resistance of the sensor
decreases. As coolant temperature varies, the ECT
sensor resistance changes resulting in a different
voltage value at the PCM ECT sensor signal circuit.
The ECT sensor provides input for various PCM
operations. The PCM uses the input to control air-
fuel mixture, timing, and radiator fan on/off times.
The PCM uses ECT sensor input to send messages
over the PCI bus to various modules for other func-
tions such as temperature gauge and AC operation.
REMOVAL
(1) With engine cold, partially drain cooling system
below level of ECT sensor.
(2) Disconnect ECT sensor electrical connector
(Fig. 17) or (Fig. 18).
(3) Remove ECT sensor.
Fig. 17 ECT SENSOR 2.0L/2.4L
Fig. 18 ECT SENSOR 2.7L
ENGINE 7 - 31