VGT(Variable Geometric Turbocharger) is the device which increases the efficiency of turbocharger at low rpm and lasts optimum turbo efficiency at high rpm as varying the cross sectional area through which exhaust gas passes turbocharger impeller. It relieves turbo lag at low speed and increse engine power generation.
Engine speed, APS signal, MAFS and Boost pressure sensor information is inputted to ECM.
ECM actuates vacuum diafragm which controls exhaust gas line as controlling VGT Control solenoid valve duty to maintain optimum state of air compression.
P0047 is set when "0"A is detected in VGT actuator control circuit for more than 1 sec.. This code is due to open or short to ground in VGT actuator circuit, or open in VGT actuator component.
Item
Detecting Condition
Possible Cause
DTC Strategy
? Signal monitoring
? VGT actuator circuit
? VGT actuator component
Enable Conditions
? IG KEY "ON"
Threshold Value
? Short to GND, wiring open
Diagnostic Time
? 1 sec.
Fail Safe
Fuel Cut
NO
EGR Off
YES
Fuel Limit
Check Lamp
VGT Actuator Component Resistance
VGT Actuator Operating Hz
VGT Actuator Operating Duty
14.7 ~ 16.1O (20?)
300Hz
76% at idle, decreases as accelerating