Subaru IMPREZA GD 2007 Series Manual page 2029

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Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
DX:DTC P2088 INTAKE CAMSHAFT POSITION ACTUATOR CONTROL CIRCUIT
LOW (BANK 1)
1. OUTLINE OF DIAGNOSIS
Detect open or short circuit of the oil flow control valve solenoid.
Judge as open NG when the current flow is small whereas duty signal is large, and judge as short NG when
the current flow is large whereas duty signal is small.
2. ENABLE CONDITION
Secondary Parameters
Battery voltage
3. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
4. DIAGNOSTIC METHOD
Abnormality Judgment
Judge as NG when the continuous time of meeting the malfunction criteria below becomes two seconds or
more.
Judgment Value
Malfunction Criteria
Oil flow control solenoid valve control
duty
Oil control solenoid valve control present
current
Time Needed for Diagnosis: 2000 milliseconds
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
Normality Judgment
Judge as OK and clear the NG when the continuous time of meeting the malfunction criteria below becomes
two seconds or more.
Judgment Value
Malfunction Criteria
Target current value of the oil flow control
solenoid valve
|Target current value of the oil flow con-
trol solenoid valve – Oil flow control sole-
noid valve control current value|
5. DTC CLEAR CONDITION
• When the OK idling cycle is completed 40 times in a row
• When "Clear Memory" is performed
6. MALFUNCTION INDICATOR LIGHT CLEAR CONDITIONS
• When the OK driving cycle is completed three times in a row
• When "Clear Memory" is performed
Enable Conditions
≥ 10.9 V
Threshold Value
≥ 99.61%
< 0.306 A
Threshold Value
≥ 0.14%
≥ 0.08 A
GD(H4DOTC)-238