DTC P0483 COOLING FAN RATIONALITY CHECK
|
|
DTC P0483 COOLING FAN RATIONALITY CHECK
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Detect the function abnormality of the radiator
fan.
Judge NG when the engine coolant temperature
slowly decreases even when the radiator fan is rotating.
Diagnostic enable condition is completed
if the radiator fan changes from OFF to ON when all of the conditions
below are completed. When one of the conditions below is not completed,
the diagnostic enable condition is not completed.
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Secondary
Parameters
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Enable
Conditions
|
Engine
Speed
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560 — 900
rpm
|
Idle
switch
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ON
|
Vehicle
speed
|
< 2
km/h (1.2 MPH)
|
Battery
voltage
|
≥ 10.9
V
|
Perform the diagnosis continuously when the
radiator fan changes from OFF to ON when idling.
Abnormality Judgment
Judge NG when the continuous time of completing
the malfunction criteria below becomes more than 5 minutes.
Judgment
Value
|
Malfunction
Criteria
|
Threshold
Value
|
Engine
coolant temperature
|
≥ 100°C
(212°F)
|
Radiator
fan signal changes
|
OFF
to ON
|
Engine
coolant temperature
|
Not reducing
|
Time Needed for Diagnosis:
5
minutes
Malfunction Indicator
Light Illumination:
Illuminates when malfunction occurs in
2 continuous driving cycles.
Normality Judgment
Judge OK and clear NG when the malfunction
criteria below are completed.
Judgment
Value
|
Malfunction
Criteria
|
Threshold
Value
|
Radiator
fan signal changes
|
OFF
to ON
|
Engine
coolant temperature
|
Reducing
|
|
•
|
When the OK idling cycle was completed 40 times
in a row
|
|
•
|
When “Clear Memory” was
performed
|
|
MALFUNCTION
INDICATOR LIGHT CLEAR CONDITION
|
|
•
|
When the OK driving cycle was completed 3 times
in a row
|
|
•
|
When “Clear Memory” was
performed
|
None
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ECM OPERATION
AT DTC SETTING
|
Memorize the freeze frame data. (For test
mode $02)
