Diagnosis And Testing - Cooling System Diesel Engine - Dodge dakota 2002 Service Manual

DR
COOLING (Continued)
WARNING: DO NOT REMOVE CYLINDER BLOCK
DRAIN PLUGS OR LOOSEN RADIATOR DRAIN-
COCK WITH SYSTEM HOT AND UNDER PRESSURE.
SERIOUS BURNS FROM COOLANT CAN OCCUR.
Drain sufficient coolant
removal. (Refer to 7 - COOLING/ENGINE/ENGINE
COOLANT THERMOSTAT - REMOVAL). Remove
accessory drive belt (Refer to 7 - COOLING/ACCES-
SORY DRIVE/DRIVE BELTS - REMOVAL).
Add coolant to radiator to bring level to within 6.3
mm (1/4 in) of the top of the thermostat housing.
DIAGNOSIS AND TESTING - COOLING SYSTEM
DIESEL ENGINE
CONDITION
TEMPERATURE GAUGE READS
LOWNOTE:
Information on dash cluster is
displayed based on broadcast data
from ECM. DTC will be set for
engine sensor circuit concern.
to allow thermostat
COOLING SYSTEM DIAGNOSIS—DIESEL ENGINE
POSSIBLE CAUSES
1. Vehicle is equipped with a heavy
duty cooling system.
2. Thermostat stuck open
3. Coolant level low.
4. Temperature gauge not
functioning correctly.
CAUTION: Avoid overheating. Do not operate
engine for an excessive period of time. Open drain-
cock immediately after test to eliminate boil over.
Start engine and accelerate rapidly three times, to
approximately 3000 rpm while observing coolant. If
internal engine combustion gases are leaking into
cooling system, bubbles will appear in coolant. If bub-
bles do not appear, internal combustion gas leakage
is not present.
1. None. System operating normally.
2. Inspect and test thermostat.
3. Fill cooling system. (Refer to 7 -
COOLING - STANDARD
PROCEDURE)
4. Check cluster (Refer to 8 -
ELECTRICAL/INSTRUMENT
CLUSTER - DIAGNOSIS AND
TESTING)
COOLING 7 - 7
CORRECTION