Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual - part 355

GD(H4DOTC)-172

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

CW:DTC P0461 FUEL LEVEL SENSOR “A” CIRCUIT RANGE/PERFORMANCE

1. OUTLINE OF DIAGNOSIS

Detect malfunctions of the fuel level sensor output property.

If the fuel level does not vary in a particular driving condition / engine condition where it should, judge as NG.

2. COMPONENT DESCRIPTION

3. ENABLE CONDITIONS

4. GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

(A)

Fuel level

(B)

Resistance

 

 

Secondary Parameters

Enable Conditions

None

 

EN-01734

0

(B)

(A)

GD(H4DOTC)-173

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

5. DIAGNOSTIC METHOD

• Abnormality Judgment
Judge as NG when the following conditions are established.

Time Needed for Diagnosis: Less than 1 second

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 following conditions are established.

Time Needed for Diagnosis: Less than 1 second

Judgment Value

Malfunction Criteria

Threshold Value

Accumulated amount of intake air

≥ 165375 g (5832.78 oz)

Max. – min. values of fuel level output

< 2.6 2 (0.69 US gal, 0.57 Imp gal)

Battery voltage

≥ 10.9 V

Engine speed

< 10000 rpm

Elapsed time after starting the engine

≥ 5000 ms

Judgment Value

Malfunction Criteria

Threshold Value

Accumulated amount of intake air

≥ 165375 g (5832.78 oz)

Max. – min. values of fuel level output

≥ 2.6 2 (0.69 US gal, 0.57 Imp gal)

Battery voltage

≥ 10.9 V

Engine speed

< 10000 rpm

Elapsed time after starting the engine

≥ 5000 ms

GD(H4DOTC)-174

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

CX:DTC P0462 FUEL LEVEL SENSOR “A” CIRCUIT LOW

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)-175

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: 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

Judgment Value

Malfunction Criteria

Threshold Value

Battery voltage

≥ 10.9 V

Elapsed time after starting the engine

≥ 3000 ms

Output voltage

< 0.173 V

Judgment Value

Malfunction Criteria

Threshold Value

Battery voltage

≥ 10.9 V

Elapsed time after starting the engine

≥ 3000 ms

Output voltage

≥ 0.173 V