Subaru IMPREZA GD 2007 Series Manual page 1889

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Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
AR:DTC P0246 TURBO/SUPER CHARGER WASTEGATE SOLENOID "A" HIGH
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of wastegate control solenoid valve.
Judge as NG when the terminal output voltage remains High during outputting the duty signal.
2. COMPONENT DESCRIPTION
(1) Coil
3. ENABLE CONDITION
Secondary Parameters
Battery voltage
After engine starting
4. GENERAL DRIVING CYCLE
Perform the diagnosis continuously after starting the engine.
5. DIAGNOSTIC METHOD
Abnormality Judgment
Judge as NG when the continuous time of meeting the malfunction criteria below becomes 640 milliseconds
or more.
Judgment Value
Malfunction Criteria
Terminal output voltage
Duty ratio for turbocharged pressure
control
Time Needed for Diagnosis: 640 milliseconds
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
Normality Judgment
Judge as OK and clear the NG when the malfunction criteria below are met.
Judgment Value
Malfunction Criteria
Terminal output voltage
(1)
Enable Conditions
> 10.9 V
1 second or more
Threshold Value
High
> 25%
Threshold Value
Low
GD(H4DOTC)-98
EN-01772