Subaru Legacy IV (2008 year). Service manual — part 630
GD(H6DO)-140
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
CO: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(H6DO)-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
GD(H6DO)-142
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
CP: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 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(H6DO)-143
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: 1000 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
t 7.212 V
Judgement Value
Malfunction criteria
Threshold value
Battery voltage
t 10.9 V
Elapsed time after starting the engine
t 3000 ms
Output voltage
< 7.212 V
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