Subaru Legacy IV (2008 year). Manual — part 626

GD(H6DO)-124

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

CE:DTC P0447 EVAPORATIVE EMISSION CONTROL SYSTEM VENT CONTROL

CIRCUIT OPEN

1. OUTLINE OF DIAGNOSIS

Detect open or short circuit of the drain valve.
Judge as NG when the ECM output level differs from the actual terminal level.

2. COMPONENT DESCRIPTION

3. ENABLE CONDITION

4. GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

(1)

Bobbin

(8)

Magnetic plate

(14)

Retainer

(2)

Coil

(9)

Shaft

(15)

Diaphragm

(3)

Diode

(10)

Plate

(16)

Movable core

(4)

Stator core

(11)

Valve

(17)

Spring

(5)

End plate

(12)

Housing

(18)

Cover

(6)

Body

(13)

Filter

(19)

O-ring

(7)

Yoke

Secondary Parameters

Enable Conditions

None

EN-02294

( 1 )

( 2 )

( 3 )

( 4 )

( 5 )

( 6 )

( 7 )

( 8 )

( 9 )

(10)

(11)

(12)

(13)

(17)

(14)

(15)

(16)

(18)

(19)

(19)

GD(H6DO)-125

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

5. 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: 2500 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

Judgement Value

Malfunction criteria

Threshold value

Battery voltage

t 10.9 V

Elapsed time after starting the engine

t 1 second

Terminal output voltage when ECM out-
puts OFF signal

Low

Judgement Value

Malfunction criteria

Threshold value

Battery voltage

t 10.9 V

Elapsed time after starting the engine

t 1 second

Terminal output voltage when ECM out-
puts OFF signal

High

GD(H6DO)-126

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

CF:DTC P0448 EVAPORATIVE EMISSION CONTROL SYSTEM VENT CONTROL

CIRCUIT SHORTED

1. OUTLINE OF DIAGNOSIS

Detect open or short circuit of the drain valve.
Judge as NG when the ECM output level differs from the actual terminal level.

2. COMPONENT DESCRIPTION

3. ENABLE CONDITION

4. GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

(1)

Bobbin

(8)

Magnetic plate

(14)

Retainer

(2)

Coil

(9)

Shaft

(15)

Diaphragm

(3)

Diode

(10)

Plate

(16)

Movable core

(4)

Stator core

(11)

Valve

(17)

Spring

(5)

End plate

(12)

Housing

(18)

Cover

(6)

Body

(13)

Filter

(19)

O-ring

(7)

Yoke

Secondary Parameters

Enable Conditions

None

EN-02294

( 1 )

( 2 )

( 3 )

( 4 )

( 5 )

( 6 )

( 7 )

( 8 )

( 9 )

(10)

(11)

(12)

(13)

(17)

(14)

(15)

(16)

(18)

(19)

(19)

GD(H6DO)-127

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

5. 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: 2500 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

Judgement Value

Malfunction criteria

Threshold value

Battery voltage

t 10.9 V

Elapsed time after starting the engine

t 1 second

Terminal output voltage when ECM out-
puts ON signal

High

Judgement Value

Malfunction criteria

Threshold value

Battery voltage

t 10.9 V

Elapsed time after starting the engine

t 1 second

Terminal output voltage when ECM out-
puts ON signal

Low