Circuit Description

Throttle motor is operated by the ECM and it opens and closes the throttle valve. The opening angle of the throttle valve is detected by the throttle control motor and sensor which is mounted on the throttle body and it provides feedback to the ECM to control the throttle motor in order to control the throttle valve opening angle properly in response to driving condition. If DTC is stored, the throttle valve is locked at a certain opening angle. Also, the whole electronically controlled throttle operation is cancelled until the system returns to normal and the ignition switch is turned OFF. DTCs will set when throttle control motor output duty is greater than 80 percent or motor current is less than .5 amps, current is greater than or equal to 10 amps, or throttle control motor current is equal to or greater than 7 amp. Possible causes are:

• Open or short in throttle control motor and sensor circuit.
• Throttle control motor and sensor.
• Defective ECM.