Subaru Legacy IV (2008 year). Service manual — part 422
GD(H4DOTC)-138
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
BV: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 CONDITION
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)-139
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
5. DIAGNOSTIC METHOD
• Abnormality Judgement
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 Judgement
Judge as OK and clear the NG if the following conditions are established.
Time Needed for Diagnosis: Less than 1 second
Judgement Value
Malfunction Criteria
Threshold Value
Accumulated amount of intake air
t 330957 g (11672.85 oz)
Max. – min. values of fuel level output
< 2.6
2 (0.69 US gal,
0.57 Imp gal)
Battery voltage
t 10.9 V
Engine speed
< 6500 rpm
Elapsed time after starting the engine
t 5000 ms
Judgement Value
Malfunction Criteria
Threshold Value
Accumulated amount of intake air
t 330957 g (11672.85 oz)
Max. – min. values of fuel level output
t 2.6
2 (0.69 US gal,
0.57 Imp gal)
Battery voltage
t 10.9 V
Engine speed
< 6500 rpm
Elapsed time after starting the engine
t 5000 ms
GD(H4DOTC)-140
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
BW: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 CONDITION
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
(1)
Engine control module (ECM)
(3)
Fuel sub level sensor
(4)
Detecting circuit
(2)
Fuel level sensor
(5)
Body integrated unit
Secondary Parameters
Enable Conditions
None
(5)
(4)
(1)
(2)
(3)
EN-05371
GD(H4DOTC)-141
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 3000 ms
Output voltage
< 0.173 V
Judgement Value
Malfunction Criteria
Threshold Value
Battery voltage
t 10.9 V
Elapsed time after starting the engine
t 3000 ms
Output voltage
t 0.173 V
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