DTC P0638 Throttle Actuator Control Range/Performance: DTC Detecting Condition

DTC DETECTION CONDITION CHART

Item		Detecting Condition	Possible cause
DTC Strategy		Detects ETS position control problems	Throttle stuck Open in motor circuit Faulty motor Faulty PCM
Enable Conditions		Engine works Battery voltage > 5V
Thresh old value	Case 1	Real throttle position - target throttle position > 8.8°
	Case 2	When real Throttle position <44°, real throttle position - target throttle position < - 8.8°
	Case 3	Real throttle position - target throttle position < - 22°
Diagnosis Time		Continuous (More than 0.6 seconds failure for every 15.6 seconds test)
MIL On Condition		1 driving cycle

If Main relay has a fault (ex. Open) under engine running, the DTCs, P0638/P0685/P1295/P2106, can happen at the same time.

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