Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service 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
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