Chrysler 1997 Stratus Convertible RHD Service Manual page 198

7 - 12 COOLING SYSTEM
DIAGNOSIS AND TESTING (Continued)
CONDITION
COOLANT LOSS TO THE
GROUND WITHOUT PRESSURE
CAP BLOWOFF, GAUGE IS
READING HIGH OR HOT
DETONATION OR PRE-IGNITION
(NOT CAUSED BY IGNITION
SYSTEM). GAUGE MAY OR MAY
NOT BE READING HIGH
HOSE OR HOSES COLLAPSE
WHEN ENGINE IS COOLING
ELECTRIC RADIATOR FAN RUNS
ALL THE TIME
ELECTRIC RADIATOR FAN WILL
NOT RUN. GAUGE READING
HIGH OR NOT
NOISY FAN
COOLING SYSTEM DIAGNOSIS CONT.
POSSIBLE CAUSES
1. Coolant leads in radiator, cooling
system hoses, water pump or
engine.
1. Engine overheating.
2. Freeze point of coolant not
correct. Mixture is too high or too
lean.
1. Vacuum created in cooling
system on engine cool-down is not
being relieved through coolant
reserve/overflow system.
1. Fan relay, powertrain control
module (PCM) or engine coolant
temperature sensor defective.
2. Check for low coolant level.
1. Fan motor defective.
2. Fan relay, powertrain control
module (PCM) or engine coolant
temperature sensor defective
3. Blown fuse in power distribution
center (PDC).
1. Fan blades loose.
2. Fan blades striking a surrounding
object.
3. Air obstructions at radiator or air
conditioning condenser.
4. Electric fan motor defective.
CORRECTION
1. Pressure test and repair as
necessary. Refer to Testing Cooling
System For Leaks in this group.
1. Check reason for overheating
and repair as necessary.
2. Check the freeze point of the
coolant. Refer to Coolant in the
group for test procedure. Adjust the
glycol to water ratio as required.
1. (a) Radiator cap relief valve
stuck. Refer to Radiator Cap in this
group. Replace if necessary.
(b) Hose between coolant
reserve/overflow tank and radiator is
kinked. Repair as necessary.
(c) Vent at coolant reserve/overflow
tank is plugged. Clean vent and
repair as necessary.
(d) Reserve/overflow tank is
internally blocked or plugged. Check
for blockage and repair as
necessary.
1. Refer to appropriate Powertrain
Diagnostic Procedures manual for
operation of the DRB scan tool.
Repair as necessary.
2. Repair as necessary.
1. Refer to appropriate Powertrain
Diagnostic Procedures manual for
operation of the DRB scan tool.
Repair as necessary.
2. Refer to appropriate Powertrain
Diagnostic Procedures manual for
operation of the DRB scan tool.
Repair as necessary.
3. Determine reason for blown fuse
and repair as necessary.
1. Replace fan blade assembly.
Refer to Cooling System Fans in
this group.
2. Locate point of fan blade contact
and repair as necessary.
3. Remove obstructions and/or
clean debris or insects from radiator
or A/C condenser.
4. Refer to procedure outlined in
this section.
JX