Subaru 2009 IMPREZA Service Manual page 1789

Diagnostic Trouble Code (DTC) Detecting Criteria
DQ: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 solenoid valve.
Judge as NG when the current is small even though the duty signal is large.
2. ENABLE CONDITIONS
Secondary Parameters
None
3. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
4. DIAGNOSTIC METHOD
• Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
Malfunction Criteria
Battery voltage
Oil flow control solenoid valve control
duty
Oil control solenoid valve control present
current
Time Needed for Diagnosis: 2000 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
• Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more
than the predetermined time.
Judgement Value
Malfunction Criteria
Battery voltage
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|
Time Needed for Diagnosis: 2000 ms
Enable Condition
Threshold Value
10.9 V
99.61 %
< 0.306 A
Threshold Value
10.9 V
0.14 A
< 0.08 A
GD(H4DOTC)-201
GENERAL DESCRIPTION