Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual - part 356

GD(H4DOTC)-176

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

CY:DTC P0463 FUEL LEVEL SENSOR “A” CIRCUIT HIGH

1. OUTLINE OF DIAGNOSIS

Detect the open or short circuit of fuel level sensor. Judge as NG if out of specification.

2. COMPONENT DESCRIPTION

3. ENABLE CONDITIONS

4. GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

(1)

Engine control module (ECM)

(3)

Fuel sub level sensor

(5)

Body integrated unit

(2)

Fuel level sensor

(4)

Detecting circuit

 

 

Secondary Parameters

Enable Conditions

None

 

(5)

(4)

(1)

(2)

(3)

EN-05371

GD(H4DOTC)-177

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

5. DIAGNOSTIC METHOD

• Abnormality Judgment
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

Time Needed for Diagnosis: 1000 ms

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cy-

cles.
• Normality Judgment
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

Judgment Value

Malfunction Criteria

Threshold Value

Battery voltage

≥ 10.9 V

Elapsed time after starting the engine

≥ 3000 ms

Output voltage

≥ 7.212 V

Judgment Value

Malfunction Criteria

Threshold Value

Battery voltage

≥ 10.9 V

Elapsed time after starting the engine

≥ 3000 ms

Output voltage

< 7.212 V

GD(H4DOTC)-178

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

CZ:DTC P04AC EVAP SYSTEM PURGE CONTROL VALVE "B" CIRCUIT LOW

1. OUTLINE OF DIAGNOSIS

Detect open or short circuit of the purge control solenoid valve 2.

Judge as NG when the ECM output level differs from the actual terminal level.

2. ENABLE CONDITIONS

3. GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

4. DIAGNOSTIC METHOD

• Abnormality Judgment
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 Judgment
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

None

 

Judgment Value

Malfunction Criteria

Threshold Value

Battery voltage

≥ 10.9 V

Elapsed time after starting the engine

≥ 1 s

Terminal output voltage when ECM outputs OFF signal

Low

Judgment Value

Malfunction Criteria

Threshold Value

Battery voltage

≥ 10.9 V

Elapsed time after starting the engine

≥ 1 s

Terminal output voltage when ECM outputs OFF signal

High

GD(H4DOTC)-179

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

DA:DTC P04AD EVAP SYSTEM PURGE CONTROL VALVE "B" CIRCUIT HIGH

1. OUTLINE OF DIAGNOSIS

Detect open or short circuit of the purge control solenoid valve 2.

Judge as NG when the ECM output level differs from the actual terminal level.

2. ENABLE CONDITIONS

3. GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

4. DIAGNOSTIC METHOD

• Abnormality Judgment
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 Judgment
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

None

 

Judgment Value

Malfunction Criteria

Threshold Value

Battery voltage

≥ 10.9 V

Elapsed time after starting the engine

≥ 1 s

Terminal output voltage when ECM outputs ON signal

High

Judgment Value

Malfunction Criteria

Threshold Value

Battery voltage

≥ 10.9 V

Elapsed time after starting the engine

≥ 1 s

Terminal output voltage when ECM outputs ON signal

Low