Subaru Legacy IV (2008 year). Manual - part 435

GD(H4DOTC)-190

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

DJ:DTC P2007 INTAKE MANIFOLD RUNNER CONTROL STUCK CLOSED 

(BANK 2)

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

GD(H4DOTC)-191

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

DK:DTC P2008 INTAKE MANIFOLD RUNNER CONTROL CIRCUIT / OPEN 

(BANK 1)

1. OUTLINE OF DIAGNOSIS

Detect the open or short circuit of tumble generator valve motor.
Judge as NG when the open signal is sent from IC after tumble generator valve driving IC diagnosis.

2. COMPONENT DESCRIPTION

3. ENABLE CONDITION

4. GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

5. DIAGNOSTIC METHOD

• Abnormality Judgement
At the main IC, check the sent signal at each timing which occurs just before the tumble generator valve out-
put is set to ON 

o OFF, and judge open NG when the open NG signal is sent 96 ms × 20 time(s) in a row.

Time Needed for Diagnosis: 96 ms × 20 time(s)
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.

• Normality Judgement
Judge as OK and clear the NG when the OK signal is sent.

Time Needed for Diagnosis: Less than 1 second

(1)

Engine control module (ECM)

(2)

Tumble generator valve

(3)

Battery

Secondary Parameters

Enable Conditions

Battery voltage

t 10.9 V

Judgement Value

Malfunction Criteria

Threshold Value

Open NG signal input

Low

Overcurrent NG signal input

High

Judgement Value

Malfunction Criteria

Threshold Value

Open NG signal input

High

Overcurrent NG signal input

High

EN-01789

E

E

(3)

M

(2)

(1)

GD(H4DOTC)-192

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

DL:DTC P2009 INTAKE MANIFOLD RUNNER CONTROL CIRCUIT LOW (BANK 1)

1. OUTLINE OF DIAGNOSIS

Detect the open or short circuit of tumble generator valve motor.
Judge as NG when the overcurrent signal is sent from IC after tumble generator valve driving IC diagnosis.

2. COMPONENT DESCRIPTION

3. ENABLE CONDITION

4. GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

5. DIAGNOSTIC METHOD

• Abnormality Judgement
At the main IC, check the sent signal at each timing which occurs just before the tumble generator valve out-
put is set to ON 

o OFF, and judge overcurrent NG when the overcurrent NG signal is sent 96 ms × 10 time(s)

in a row.

Time Needed for Diagnosis: 96 ms × 10 time(s)
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.

• Normality Judgement
Judge as OK and clear the NG when the OK signal is sent.

Time Needed for Diagnosis: Less than 1 second

(1)

Engine control module (ECM)

(2)

Tumble generator valve

(3)

Battery

Secondary Parameters

Enable Conditions

Battery voltage

t 10.9 V

Judgement Value

Malfunction Criteria

Threshold Value

Open NG signal input

High

Overcurrent NG signal input

Low

Judgement Value

Malfunction Criteria

Threshold Value

Open NG signal input

High

Overcurrent NG signal input

High

EN-01789

E

E

(3)

M

(2)

(1)

GD(H4DOTC)-193

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

DM:DTC P2011 INTAKE MANIFOLD RUNNER CONTROL CIRCUIT / OPEN 

(BANK 2)

1. OUTLINE OF DIAGNOSIS

Detect the open or short circuit of tumble generator valve motor.
Judge as NG when the open signal is sent from IC after tumble generator valve driving IC diagnosis.

2. COMPONENT DESCRIPTION

3. ENABLE CONDITION

4. GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

5. DIAGNOSTIC METHOD

• Abnormality Judgement
At the main IC, check the sent signal at each timing which occurs just before the tumble generator valve out-
put is set to ON 

o OFF, and judge open NG when the open NG signal is sent 96 ms × 20 time(s) in a row.

Time Needed for Diagnosis: 96 ms × 20 time(s)
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.

• Normality Judgement
Judge as OK and clear the NG when the OK signal is sent.

Time Needed for Diagnosis: Less than 1 second

(1)

Engine control module (ECM)

(2)

Tumble generator valve

(3)

Battery

Secondary Parameters

Enable Conditions

Battery voltage

t 10.9 V

Judgement Value

Malfunction Criteria

Threshold Value

Open NG signal input

Low

Overcurrent NG signal input

High

Judgement Value

Malfunction Criteria

Threshold Value

Open NG signal input

High

Overcurrent NG signal input

High

EN-01789

E

E

(3)

M

(2)

(1)