Subaru Legacy IV (2008 year). Service manual — part 434
GD(H4DOTC)-186
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
• Idle speed diagnosis
Abnormality Judgement
Judge as NG when the following conditions are established after the predetermined time.
Time Needed for Diagnosis: 14 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cy-
cles.
Normality Judgement
Judge as OK and clear the NG if the following conditions are established.
Time Needed for Diagnosis: Less than 1 second
Judgement Value
Malfunction Criteria
Threshold Value
Continuous time of (Target engine speed
– Actual engine speed > –100 rpm)
t 6000 ms
Continuous time of (actual retard amount
> 30 °CA)
t 0 ms
Judgement Value
Malfunction Criteria
Threshold Value
Continuous time of (Target engine speed
– Actual engine speed > –100 rpm)
< 6000 ms
Continuous time of (actual retard amount
> 30 °CA)
< 0 ms
GD(H4DOTC)-187
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
DG:DTC P2004 INTAKE MANIFOLD RUNNER CONTROL STUCK OPEN (BANK 1)
1. OUTLINE OF DIAGNOSIS
Detect the malfunction of tumble generator valve motor function.
Judge open fixing malfunction when the opening degree is large even after finishing the tumble generator
valve closing driving.
2. ENABLE CONDITION
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.
Time Needed for Diagnosis: 3000 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.
Time Needed for Diagnosis: Less than 1 second
Secondary Parameters
Enable Conditions
Battery voltage
t 10.9 V
Engine coolant temperature
t –30 °C (–22 °F)
Ambient air temperature
t –30 °C (–22 °F)
Judgement Value
Malfunction Criteria
Threshold Value
Tumble generator valve opening
t 64.3 °
Tumble generator valve “close” signal
output
t 3200 ms
Judgement Value
Malfunction Criteria
Threshold Value
Tumble generator valve opening
< 64.3 °
Tumble generator valve “close” signal
output
t 3200 ms
GD(H4DOTC)-188
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
DH:DTC P2005 INTAKE MANIFOLD RUNNER CONTROL STUCK OPEN (BANK 2)
1. OUTLINE OF DIAGNOSIS
Detect the malfunction of tumble generator valve motor function.
Judge open fixing malfunction when the opening degree is large even after finishing the tumble generator
valve closing driving.
2. ENABLE CONDITION
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.
Time Needed for Diagnosis: 3000 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.
Time Needed for Diagnosis: Less than 1 second
Secondary Parameters
Enable Conditions
Battery voltage
t 10.9 V
Engine coolant temperature
t –30 °C (–22 °F)
Ambient air temperature
t –30 °C (–22 °F)
Judgement Value
Malfunction Criteria
Threshold Value
Tumble generator valve opening
t 64.3 °
Tumble generator valve “close” signal
output
t 3200 ms
Judgement Value
Malfunction Criteria
Threshold Value
Tumble generator valve opening
< 64.3 °
Tumble generator valve “close” signal
output
t 3200 ms
GD(H4DOTC)-189
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
DI: DTC P2006 INTAKE MANIFOLD RUNNER CONTROL STUCK CLOSED
(BANK 1)
1. OUTLINE OF DIAGNOSIS
Detect the malfunction of tumble generator valve motor function.
Judge close fixing malfunction when the opening degree is small even after finishing the tumble generator
valve open driving.
2. ENABLE CONDITION
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.
Time Needed for Diagnosis: 3000 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.
Time Needed for Diagnosis: Less than 1 second
Secondary Parameters
Enable Conditions
Battery voltage
t 10.9 V
Engine coolant temperature
t –30 °C (–22 °F)
Ambient air temperature
t –30 °C (–22 °F)
Judgement Value
Malfunction Criteria
Threshold Value
Tumble generator valve opening
< 64.3 °
Tumble generator valve “open” signal
output
t 4600 ms
Judgement Value
Malfunction Criteria
Threshold Value
Tumble generator valve opening
t 64.3 °
Tumble generator valve “open” signal
output
t 4600 ms
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