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 output signals
from FLS under detecting condition, if Difference between previous and
current Fuel Level Signal is high than 10% , PCM sets P0464.
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
B | |
EnableConditions
|
Case
1
|
| •
|
Engine Coolant Temperature ≥
60°C
(Fully Warmed up
state) | |
Threshold value
|
| •
|
Difference between previous and current
Fuel Level voltage Signal >
10% | |
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 Sender B connector and remove
it from fuel tank. |
| 3. |
Measure the reistance of Fuel level sender B
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 ?
|
|
▶ There may
be scratches on the resistance of Fuel Level Sender B.
Thoroughly check that resistance is suddenly changed by
lifting up and down the fuel level float. Go to "Verification
of Vehicle Repair " procedure.
|
|
|
▶
Substitute with a known - good Fuel Level Sender B and check
for proper operation. If the problem is corrected, replace
Fuel Level Sender B 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.
|
|
