303-03-138 Engine Cooling 303-03-138
DIAGNOSIS AND TESTING
E6862 EN 07/2001 2002 Bantam
Engine Cooling
Special Tool(s)
Pressure Tester, Cooling
System
303-396 (24-001 A)
Adapter for 303-396
303-396-01 (24-001-01 A)
Inspection and Verification
1. Verify the customer concern.
2. Visually inspect for obvious signs of
mechanical or electrical damage.
Visual Inspection Chart
Mechanical
Electrical
• Coolant leak(s)
• Radiator
• Water pump
• Thermostat
• Coolant expansion
tank
• Cooling fan
• Accessory drive belt
• Fuse(s)
• Relay(s)
• Wiring harness
• Electrical
connector(s)
• Cooling fan motor
• Engine coolant
temperature (ECT)
sender unit
• ECT sensor
• Cooling fan motor
switch
• Powertrain control
module (PCM)
3. If an obvious cause for an observed or
reported concern is found, correct the cause
(if possible) before proceeding to the next
step.
4. If the concern is not visually evident, verify
the symptom and refer to the Symptom
Chart.
Symptom Chart
Condition
Possible Sources
Action
• Loss of coolant
• Radiator.
• CHECK the radiator. INSTALL a
new radiator if necessary.
• Water pump.
• CHECK the water pump.
INSTALL a new water pump if
necessary.
• Coolant expansion tank.
• CHECK the coolant expansion
tank. INSTALL a new coolant
expansion tank if necessary.
• Engine.
• CHECK the engine.
REFER to
Section 303-00.
• Coolant hose(s).
• CHECK the coolant hose(s).
INSTALL a new coolant hose(s)
if necessary.
• Heater core.
• CHECK the heater core.
INSTALL a new heater core if
necessary.
• The engine overheats
• Coolant level.
• CHECK the coolant level. FILL
as necessary.
• System restriction.
• INSPECT the system for restric-
tions. REPAIR as necessary.
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