Subaru IMPREZA GD 2007 Series Manual page 2009

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Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
DL:DTC P2004 INTAKE MANIFOLD RUNNER CONTROL STUCK OPEN (BANK 1)
1. OUTLINE OF DIAGNOSIS
Detect the malfunction of tumble generator valve motor function.
Judge as stuck open malfunction when the opening degree is large even after finishing the tumble generator
valve opening driving.
2. ENABLE CONDITION
Secondary Parameters
Battery voltage
Engine coolant temperature
Ambient air temperature
3. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
4. DIAGNOSTIC METHOD
Abnormality Judgment
Judge as NG when the continuous time of completing the malfunction criteria below becomes three seconds
or more.
Judgment Value
Malfunction Criteria
Tumble generator valve opening
Tumble generator valve "close" signal
output
Time Needed for Diagnosis: 3 seconds
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
Normality Judgment
Judge as OK and clear the NG when the malfunction criteria below are met.
Judgment Value
Malfunction Criteria
Tumble generator valve opening
Tumble generator valve "close" signal
output
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
7. FAIL SAFE
Tumble generator valve opening
• For tumble generator valve full closing points learning, not allowed to update to closing side.
• For tumble generator valve full opening points learning, not allowed to update to opening side.
Tumble generator valve control
• Output the open signal.
8. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)
Enable Conditions
≥ 10.9 V
≥ 0°C (32°F)
≥ 0°C (32°F)
Threshold Value
≥ 67.4°
2.2 seconds or more
Threshold Value
< 67.4°
2.2 seconds or more
GD(H4DOTC)-218