Operation; Diagnosis And Testing - Radiator Fan Motor - Chrysler Dodge Caravan 2002 Manual

RG
RADIATOR FAN (Continued)

OPERATION

COOLANT TEMPERATURE
Fan Operation
Speeds:
Fan On:
Fan Off:

DIAGNOSIS AND TESTING - RADIATOR FAN MOTOR

CONDITION
NOISY RADIATOR FAN
ELECTRIC FAN MOTOR DOES
NOT OPERATE
ELECTRIC RADIATOR FAN
OPERATES ALL THE TIME
RADIATOR FAN OPERATION CHART
Initial
104°C (220°F) 110°C (230°F) Fan
Speed Duty-Cycles
(Ramps-up) from
30% to 99%
101°C (214°F) Fan Speed
Duty-Cycles
(Ramps-down) from
99% to 30%
RADIATOR FAN DIAGNOSIS CHART
POSSIBLE CAUSES
1. Fan blade loose.
2. Fan blade striking a surrounding
object.
3. Air obstructions at radiator or A/C
condenser.
4. Electric fan motor defective.
1. Fan relay, powertrain control
module (PCM), coolant temperature
sensor, or wiring defective.
2. Defective A/C pressure
transducer.
1. Fan relay, powertrain control
module (PCM), coolant temperature
sensor or wiring defective.
2. Check for low coolant level.
3. Defective A/C pressure
transducer.
Max Initial
1,724 Kpa (250 psi)
1,710 Kpa (248 psi)
CORRECTION
1. Replace fan assembly. (Refer to
7 - COOLING/ENGINE/RADIATOR
FAN - REMOVAL)
2. Locate point of fan blade contact
and repair as necessary.
3. Remove obstructions and/or
clean debris.
4. Replace fan assembly. (Refer to
7 - COOLING/ENGINE/RADIATOR
FAN - REMOVAL)
1. (Refer to Appropriate Diagnostic
Information) Repair as necessary.
2. (Refer to Appropriate Diagnostic
Information) Repair as necessary.
1. (Refer to Appropriate Diagnostic
Information) Repair as necessary.
2. Add coolant as necessary.
3. (Refer to Appropriate Diagnostic
Information) Repair as necessary.
ENGINE
A/C PRESSURE
Max
2,068 Kpa (300 psi)
Fan Speed
Duty-Cycles
(Ramps-up) from
30% to 99%
Fan Speed
Duty-Cycles
(Ramps-down) from
99% to 30%
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