P2103 SCION - Throttle Actuator Control Motor Circuit High
- Dirty throttle body
- Faulty Throttle Actuator Control Motor
- Throttle Actuator Control Motor harness is open
- Throttle Actuator Control Motor circuit poor electrical connection
- Faulty Engine Control Module (ECM)
- Engine Light ON (or Service Engine Soon Warning Light)
P2103 Scion DescriptionThe throttle actuator is operated by the Engine Control Module (ECM) and it opens and closes the throttle valve. Power supply for the throttle control motor is provided to the ECM via throttle control motor relay. The throttle control motor relay is ON/OFF controlled by the ECM. When the ignition switch is turned ON, the ECM sends an ON signal to throttle control motor relay and battery voltage is provided to the ECM. When the ignition switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery voltage is not provided to the ECM. The opening angle of the throttle valve is detected by the throttle position sensor which is mounted on the throttle body. The throttle position sensor provides feedback to the ECM. This feedback allows the ECM to control the throttle actuator and monitor the throttle opening angle in response to driver inputs.
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