Chrysler Dodge Caravan 2002 Manual page 294

RG
COOLING 2.5L TURBO DIESEL (Continued)
CONDITION
INADEQUATE AIR
CONDITIONER
PERFORMANCE
(COOLING SYSTEM
SUSPECTED)
INADEQUATE HEATER
PERFORMANCE. MAY BE
ACCOMPANIED BY LOW
GAUGE READING
HEAT ODOR
POSSIBLE CAUSES
1. Radiator and/or A/C condensor is
restricted, obstructed or dirty
(insects, leaves, etc.)
2. Engine is overheating (heat may
be transferred from radiator to A/C
condensor. High underhood
temperatures due to engine
overheating may also transfer heat
to A/C condensor).
3. The cooling system is equipped
with air seals at the radiator and/or
A/C condensor. If these seals are
missing or damaged, not enough air
flow will be pulled through the
radiator and A/C condensor.
1. Diesel engines, due to their
inherent efficiency are slower to
warm up than gasoline powered
engines, and will operate at lower
temperatures when the vehicle is
unloaded.
2. Coolant level low.
3. Obstruction in heater hose fitting
at engine.
4. Heater hose kinked.
5. Water pump is not pumping water
to heater core. When the engine is
fully warmed up, both heater hoses
should be hot to the touch. If only
one of the hoses is hot the water
pump may not be operating correctly.
The accessory drive belt may also
be slipping causing poor water pump
operation.
1. Various heat shields are used at
certain drive line components. One
or more of these shields may be
missing.
2. Is temerature gauge reading
above the normal range?
3. Is the Cooling fan operating
correctly?
COOLING 2.5L TURBO DIESEL
CORRECTION
1. Remove restriction or clean
debris from radiator or A/C
condensor.
2. Correct overheating
condition.
3. Check for missing or
damaged air seals. Repair as
necessary.
1. The lower gauge reading
may be normal.
2. Pressure test cooling system.
Repair leaks as necessary.
3. Remove heater hoses and
check for obstructions. Repair
as necessary.
4. Locate kinked area. Repair
as necessary.
5. Refer to water pumps in this
group. Repair as necessary. If a
slipping belt is detected, refer to
Engine Accessory Drive Belts in
this group. Repair as
necessary.
1. Locate missing shields.
Repair or replace as necessary.
2. Refer to the previous
Temperature Gauge Reads
High in these Diagnostic
Charts. Repair as necessary.
3. Refer to Cooling System Fan
in this group for diagnosis.
Repair as necessary.
7a - 5