allow air flow across the cooling fins while vehicle is
in motion.
OPERATION
The radiator functions as a heat exchanger, using
air flow across the exterior of the radiator tubes. This
heat is then transferred from the coolant and into
the passing air.
COOLING SYSTEM FAN
DESCRIPTION
The cooling system fan module includes two elec-
tric motors, a motor support, and a one piece shroud.
The module is fastened to the radiator by screws
with square nuts and retaining clips (Fig. 7).
OPERATION
The cooling system fans will operate at two speeds
and are simultaneously activated. The dual fan sys-
tem improves engine cooling and air conditioning
performance in hot weather and severe driving con-
ditions, while reducing fan noise and power consump-
tion.
The cooling fans will operate based on inputs to
the Powertrain Control Module (PCM). When fan
operation is determined necessary, the PCM provides
a ground to the fan relay control circuit.
The inputs provided to the PCM that influence fan
operation are:
• Coolant Temperature Sensor
• Intake Air Temperature Sensor
• Output Speed Sensor
• Transmission Oil Temperature Sensor
• A/C Pressure Transducer
HOSE CLAMPS
DESCRIPTION
The cooling system utilizes both worm drive and
spring type hose clamps. If a spring type clamp
replacement is necessary, replace with the original
Mopart equipment spring type clamp. To identify
size of spring hose clamps, the size in millimeters
Fig. 5 Water Pump—3.2/3.5L Engine
1 – O-RING
2 – IMPELLER
3 – WATER PUMP BODY
Fig. 6 Radiator—Typical
1 – COOLING TUBES
2 – TANKS
Fig. 7 Fan Module
1 – ELECTRICAL CONNECTOR
2 – FASTENERS
3 – CLIPS
LH COOLING SYSTEM 7 - 5
DESCRIPTION AND OPERATION (Continued)
To Next Page
Loading...
Need help?
General
