As closing or opening vacuum line from vacuum pump which is installed at the end of cam shaft, with the method of duty control, Throttle Flap Actuator controls throttle flap valve when engine is turning OFF.
When turning engines OFF, Throttle flap valve cuts intake air to prevent overrun phenomena.(In spite of turning engine OFF, engine does not stop and runs for a while due to rotating inertia of engine and fuel leakage at injector nozzle. )
To check its operation, watch if it operate when turning engine OFF.
P2112 is set when "0"A in throttle flap actuator is detected for more than 0.11 sec. this code is due to 1)open or short to ground in control circuit or 2)internal open in actuator component.
Item | Detecting Condition | Possible Cause | |
DTC Strategy | ● Voltage monitoring | ● TFA circuit ● TFA component | |
Enable Conditions | ● IG KEY "ON" | ||
Threshold Value | ● Short to GND, Wiring open | ||
Diagnostic Time | ● 110ms | ||
Fail Safe | Fuel Cut | NO | |
EGR Off | YES | ||
Fuel Limit | NO | ||
Check Lamp | NO |
Throttle flap actuator component resistance | Throttle flap actuator operating Hz | Throttle flap actuator operating duty |
23.8~31.3Ω (20℃) | 300Hz | 38%(no vacuum)~90%(vacuum) |
