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SEC088D
Component Description
NFEC0999
The fuel level sensor is mounted in the fuel level sensor unit. The
sensor detects a fuel level in the fuel tank and transmits a signal
to the ECM.
It consists of two parts, one is mechanical float and the other side
is variable resistor. Fuel level sensor output voltage changes
depending on the movement of the fuel mechanical float.
On Board Diagnostic Logic
NFEC1000
ECM receives two signals from the fuel level sensor circuit.
One is fuel level sensor power supply circuit, and the other is fuel
level sensor ground circuit.
This diagnosis indicates the former, to detect open or short circuit
malfunction.
DTC No.
Trouble diagnosis
name
DTC Detecting Condition Possible Cause
P0462
0462
Fuel level sensor cir-
cuit low input
An excessively low voltage is sent from the sensor
is sent to ECM.
I Harness or connectors
(The sensor circuit is open or
shorted.)
I Fuel level sensor
P0463
0463
Fuel level sensor cir-
cuit high input
An excessively high voltage is sent from the sen-
sor is sent to ECM.
DTC Confirmation Procedure
NFEC1001
NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that bat-
tery voltage is more than 11V at ignition switch “ON”.
SEF195Y
WITH CONSULT-II
NFEC1001S01
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Wait at least 5 seconds.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-440.
WITH GST
NFEC1001S02
Follow the procedure “WITH CONSULT-II” above.
DTC P0462, P0463 FUEL LEVEL SENSOR
Component Description
EC-438
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