The Fuel Level
Sensor(FLS) measures the fuel level in fuel tank and its information is
used to supply the PCM with information regarding the monitoring condition
of the EVAP canister purge system for leak detection. If the fuel level
sensor is monitored for high or low stuck or difference between voltage of
fuel level sensor and voltage deviation of fuel level sensor is exceeds
limited value while driving, this is interpreted by the PCM as a
fault
Checking fuel level
change under detecting condition, if the fuel level difference between
current and previous is lower than 3.5% while odometer difference between
present and previous is higher than 125km, PCM sets P0461. MIL(Malfunction
Indication Lamp) turns on when the malfunction lasts till consecutive 2
driving cycle.
Item
|
Detecting
Condition
|
Possible cause
|
DTC
Strategy
|
| •
|
Detects a stuck fuel level
sender | |
| •
|
Faulty Fuel Level Sender
Stuck | |
EnableConditions
|
| •
|
Fuel Level Fault Not
Present | |
Threshold
value
|
| •
|
Current fuel level sender - Previous
fuel level sender ≤ 3.5%
(After Present Odometer - Previous
Odometer ≥ 125 km) | |
DiagnosisTime
|
|
MIL On
Condition
|
|
FLS
|
Normal
Parameter
|
Float
position
|
8/8
|
7/8
|
6/8
|
2/8
|
Warning Lamp
ON
|
Sender
A(Main)-Resistance(Ω)
|
4
|
15.5
|
15.5
|
41
|
74.6
|
Sender
B(Sub)-Resistance(Ω)
|
4
|
20.5
|
41.5
|
100
|
100
|
Fuel
volume(ℓ)
|
74.5
|
64.3
|
56.2
|
23.7
|
11.6
|
| 1. |
Check DTC Status
| (1) |
Connect scantool to Data Link
Connector(DLC). |
| (3) |
Select "DTC" button, and then Press "DTC
Status" to check DTC's information from the DTCs
menu. |
| (4) |
Read "DTC Status"
parameter.
|
| (5) |
Is parameter displayed "Present
fault"?
|
|
▶ Go
to "Terminal and Connector inspection"
procedure.
|
|
|
▶
Fault is intermittent caused by PCM memory was not
cleared after repair.
▶ Erase
DTC and drive the vehicle to satisfy the enable codition
then, go to "Component Inspection"
procedure.
|
| |
| Terminal And Connector
Inspection |
| 1. |
Many malfunctions in the electrical system are
caused by poor harness and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or
chemical damage. |
| 2. |
Thoroughly check connectors for looseness,
poor connection, bending, corrosion, contamination, deterioration,
or damage. |
| 3. |
Has a problem been found?
|
|
▶ Repair as
necessary and go to "Verification of Vehicle Repair"
procedure
|
|
|
▶ Go to
"Component Inspection"
procedure
|
|
| 2. |
Disconnect Fuel Level Sender A & Fuel Pump
Motor connector and Fuel Level Sender B
connector. |
| 3. |
Remove these senders from fuel tank and
measure the reistance of Fuel level sender while lifting up and down
the fuel level float. |
| 4. |
Does the resistance of FLS change as lifting
up and down the fuel level float ?
|
|
▶ Fault is
intermittent such as Float was stuck by something. Thoroughly
check that any foreign material intrupts float moment. Erase
DTC and drive the vehicle to satisfy the enable codition then,
go to "Verification of Vehicle Repair "
procedure.
|
|
|
▶
Substitute with a known - good Fuel Level Sender and check for
proper operation.
▶ If the problem
is corrected, replace Fuel Level Sender and go to
"Verification of Vehicle Repair"
procedure.
|
|
| Verification Of Vehicle
Repair |
After a repair, it is
essential to verify that the fault has been corrected.
| 1. |
Connect scantool and select "DTC"
button. |
| 2. |
Press "DTC Status" button and confirm that
"DTC Readiness Flag" indicates "Completed". If not, drive the
vehicle within conditions noted in the freeze frame data or enable
conditions |
| 3. |
Read "DTC Status"
parameter |
| 4. |
Is parameter displayed "History(Not Present)
fault"?
|
|
▶ System
performing to specification at this time. Clear the
DTC
|
|
|
▶ Go to the
applicable troubleshooting
procedure.
|
|
