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

DTC DETECTING CONDITION CHART

Item		Detecting Condition	Possible cause
DTC Strategy		Monitor the throttle position	Throttle stuck Open in motor circuit Faulty motor Faulty PCM
Enable Conditions		Engine running Battery voltage > 5V
Thresh old value	Case 1	The difference between the real ETS motor & TPS value and the target ETS motor & TPS value is over 4.5°.
	Case2	When real Throttle position is below 36°, (the real throttle position - the target throttle position) < - 4.5°
	Case3	(the real throttle position - the target throttle position) < - 18°
Diagnosis Time		Continuous
MIL On Condition		1 driving cycle

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

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