Subaru LEGACY 2006 Manual page 459

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Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
I: DTC P0076 INTAKE VALVE CONTROL SOLENOID CIRCUIT LOW (BANK 1)
1. OUTLINE OF DIAGNOSIS
Detect the open circuit of the oil switching solenoid valve.
Judge as NG when the current is small even though the output duty is large.
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 when the following conditions are established is more than 2 sec-
onds.
Judgment Value
Malfunction Criteria
Duty ratio
Control current
Time Needed for Diagnosis: 2 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 2 seconds.
Judgment Value
Malfunction Criteria
|Oil switching solenoid valve current tar-
get current value – oil switching solenoid
valve current value|
Control current
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 CONDITION
• When the OK driving cycle is completed 3 times in a row
• When "Clear Memory" is performed
7. FAIL SAFE
None
8. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)
Enable Conditions
≥ 10.9 V
Threshold Value
≥ 30%
< 0.026 A
Threshold Value
< 0.08 A
≥ 0.11 A
GD(H4SO)-22