DTC P0638 THROTTLE ACTUATOR CONTROL RANGE/PERFORMANCE (BANK 1)
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DTC P0638 THROTTLE ACTUATOR CONTROL RANGE/PERFORMANCE (BANK
1)
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Judge NG when the target opening angle and
actual opening angle is mismatched or the current to motor is more
than specified duty for specified time continuously.
(1)
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Motor
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(3)
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Engine
control module (ECM)
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(2)
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Throttle
position sensor
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(4)
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Drive circuit
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Secondary
Parameters
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Enable
Conditions
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Ignition
switch
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ON
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Normal
operation of electric control throttle
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ON
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Always perform the diagnosis continuously
when the electric control throttle is operating.
Judge OK and clear NG when the malfunction
criteria below are completed.
Judgment
Value
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Malfunction
Criteria
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Threshold
Value
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Difference
between target opening angle and actual opening angle
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Less
than 3.5°
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Output
duty to drive circuit
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Less than
95%
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Time Needed for Diagnosis:
Target opening angle and actual opening angle:
250 milliseconds (For NG) 2000 milliseconds (For OK)
Output duty to drive circuit: 2000 milliseconds
(1)
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Difference between target opening angle and actual opening
angle (°)
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(2)
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Target
throttle opening angle (°)
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(3)
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NG area
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(1)
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Judgment
time (milliseconds)
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(2)
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Throttle position sensor 1 opening angle
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(3)
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NG area
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Malfunction Indicator
Light Illumination:
Illuminates as soon as malfunction occurs.
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•
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When the OK idling cycle was completed 40 times
in a row
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When “Clear Memory” was
performed (Only engine stopped)
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MALFUNCTION
INDICATOR LIGHT CLEAR CONDITION
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When the OK driving cycle was completed 3 times
in a row
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When “Clear Memory” was
performed (Only engine stopped)
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Stop the current to electric control throttle
motor. (Fix the throttle opening angle to 6°.)
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ECM OPERATION
AT DTC SETTING
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Memorize the freeze frame data. (For test
mode $02)
