Subaru 2009 IMPREZA Service Manual page 748

Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
J: DTC P0077 INTAKE VALVE CONTROL SOLENOID CIRCUIT HIGH (BANK 1)
1. OUTLINE OF DIAGNOSIS
Detect short circuits of the oil switching solenoid valve.
Judge as a short NG when the current is large even though the output duty is small.
2. ENABLE CONDITION
Secondary Parameters
Battery voltage
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
Duty ratio
Control 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
|Oil switching solenoid valve target cur-
rent value – Oil switching solenoid valve
current value|
Time Needed for Diagnosis: 2000 ms
K: DTC P0082 INTAKE VALVE CONTROL SOLENOID CIRCUIT LOW (BANK 2)
1. OUTLINE OF DIAGNOSIS
NOTE:
For the detection standard, refer to DTC P0076. <Ref. to GD(H4SO)-23, DTC P0076 INTAKE VALVE CON-
TROL SOLENOID CIRCUIT LOW (BANK 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>
L: DTC P0083 INTAKE VALVE CONTROL SOLENOID CIRCUIT HIGH (BANK 2)
1. OUTLINE OF DIAGNOSIS
NOTE:
For the detection standard, refer to DTC P0077. <Ref. to GD(H4SO)-24, DTC P0077 INTAKE VALVE CON-
TROL SOLENOID CIRCUIT HIGH (BANK 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>
Enable Condition
10.9 V
Threshold Value
< 7 %
0.465 A
Threshold Value
< 0.08 A
GD(H4SO)-24