Subaru LEGACY 2006 Manual page 446

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Diagnostic Trouble Code (DTC) Detecting Criteria
5. DIAGNOSTIC METHOD
Abnormality Judgment
Judge as NG when the continuous time is longer than the predetermined time when the following conditions
are established.
Judgment Value
Malfunction Criteria
Low NG
Duty ratio
Variable valve lift diagnosis oil pressure
switch
High NG
Duty ratio
Variable valve lift diagnosis oil pressure
switch
Time Needed for Diagnosis:
Low side 0.784 seconds
High side 3.0 seconds
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
Normality Judgment
Judge as OK and clear the NG when the continuous time when the following conditions are established are
more than 3 seconds.
Judgment Value
Malfunction Criteria
Low OK
Duty ratio
Variable valve lift diagnosis oil pressure
switch
High OK
Duty ratio
Variable valve lift diagnosis oil pressure
switch
6. DTC CLEAR CONDITION
• When the OK idling cycle is completed 40 times in a row
• When "Clear Memory" is performed
7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
• When the OK driving cycle is completed 3 times in a row
• When "Clear Memory" is performed
8. FAIL SAFE
None
9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)
B: DTC P0028 INTAKE VALVE CONTROL SOLENOID CIRCUIT RANGE/PER-
FORMANCE (BANK 2)
NOTE:
For diagnostic procedures, refer to DTC P0026. <Ref. to GD(H4SO)-8, DTC P0026 INTAKE VALVE CON-
TROL SOLENOID CIRCUIT RANGE/PERFORMANCE (BANK 1), Diagnostic Trouble Code (DTC) Detecting
Criteria.>
Threshold Value
≥ 62%
ON
< 33%
OFF
Threshold Value
≥ 62%
OFF
< 33%
ON
GD(H4SO)-9
GENERAL DESCRIPTION