Subaru Legacy IV (2008 year). 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