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
of fuel level sender B under detecting condition, if the fuel level
voltage is low than 0.36V, PCM sets P0462. MIL(Malfunction Indication
Lamp) turns on when the malfunction lasts till consecutive 2 driving
cycle.
Item
|
Detecting
Condition
|
Possible cause
|
DTC
Strategy
|
| •
|
Detects a continuous short to low or
open in either the signal circuit or the fuel level sender
B | |
| •
|
Open or short to ground in signal
circuit |
| •
|
Faulty Fuel Level sender
B |
|
EnableConditions
|
|
Threshold
value
|
| •
|
Raw fuel level sender B output <
0.36V | |
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 poor contact in the
sensor's and/or PCM's connector or was repaired and PCM
memory was not cleared. Thoroughly check connectors for
looseness, poor connection, ending, corrosion,
contamination, deterioration, or damage. Repair or
replace as necessary and go to "Verification of Vehicle
Repair"
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 "
Signal Circuit Inspection "
procedure
|
|
| Signal Circuit
Inspection |
■ Check Voltage
| 1. |
IG "OFF" and disconnect Fuel Sender B
connector and PCM connector. |
| 3. |
Measure voltage between Fuel level signal B
terminal of PCM harness connector and chassis ground.
Specification
: Approx. 11 ~ 12V
| |
| 4. |
Is the measured voltage within specification
?
|
|
▶ Go to
"Component Inspection" procedure.
|
|
|
▶ Repair
short to ground or open in harness and go to "Verification of
Vehicle Repair"
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 Fuel level sender B
change with lifting up and down the fuel level float ?
|
|
▶
Substitute with a known - good PCM and check for proper
operation. If the problem is corrected, replace PCM and go to
"Verification of Vehicle Repair" procedure.
|
|
|
▶
Substitute with a known - good Fuel Level Sensor B and check
for proper operation. If the problem is corrected, replace
Fuel Level Sensor B and go to "Verification of Vehicle Repair"
procedure.
|
|
There is a memory reset function on
scantool that can erase optional parts automatically detected
and memorized by PCM.Before or after testing PCM on the
vehicle, use this function to reuse the PCM on the
others | |
| 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.
|
|
