Subaru Legacy IV (2008 year). Manual - part 215

GD(H4SO)-162

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 when malfunction occurs in 2 continuous driving cy-
cles.

• 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(H4SO)-163

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

CM:DTC P1420 FUEL TANK PRESSURE CONTROL SOL. VALVE CIRCUIT HIGH

1. OUTLINE OF DIAGNOSIS

Detect the open/short circuit of pressure control solenoid valve.
Judge as NG when ECM output level is different from actual terminal level.

2. COMPONENT DESCRIPTION

3. ENABLE CONDITION

4. GENERAL DRIVING CYCLE

Always perform the diagnosis after starting the engine.

(A)

Barometric pressure

(B)

Shut-off valve

(C)

To fuel tank

(1)

Filter

(3)

Connector terminal

(5)

Valve

(2)

Coil

(4)

Diaphragm

Secondary Parameters

Enable Conditions

None

 

EN-01759

(1)

(2)

(3)

(4)

(5)

(A)

(B)

(C)

GD(H4SO)-164

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 when malfunction occurs in 2 continuous driving cy-
cles.

• 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

GD(H4SO)-165

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

CN:DTC P1443 VENT CONTROL SOLENOID VALVE FUNCTION PROBLEM

1. OUTLINE OF DIAGNOSIS

Detect the abnormal function (stuck closed) of the drain valve.
Judge as NG when fuel tank pressure is low.

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

Drain valve

Open

Battery voltage

t 10.9 V

Barometric pressure

t 75 kPa (563 mmHg, 
22.2 inHg)

Tank pressure when starter is OFF 

o

ON

–0.4 kPa (–3.2 mmHg, 
–0.1 inHg)

 and

 

1.4 kPa (10.7 mmHg, 
0.4 inHg)

EN-02294

( 1 )

( 2 )

( 3 )

( 4 )

( 5 )

( 6 )

( 7 )

( 8 )

( 9 )

(10)

(11)

(12)

(13)

(17)

(14)

(15)

(16)

(18)

(19)

(19)