Infiniti M35/M45 Y50. Manual - part 675
DTC P0462, P0463 FUEL LEVEL SENSOR CIRCUIT
EC-1173
[VK45DE]
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DTC P0462, P0463 FUEL LEVEL SENSOR CIRCUIT
PFP:25060
Component Description
NBS005IZ
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 “unified meter and A/C amp.”. The “unified meter and A/C
amp.” sends the fuel level sensor signal to the ECM through CAN
communication line.
It consists of two parts, one is mechanical float and the other is vari-
able resistor. Fuel level sensor output voltage changes depending on
the movement of the fuel mechanical float.
●
Fuel level sensor unit and fuel pump (1)
●
Fuel pressure regulator (2)
●
Fuel tank temperature sensor (3)
On Board Diagnosis Logic
NBS005J0
NOTE:
●
If DTC P0462 or P0463 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis
for DTC U1000, U1001. Refer to
EC-865, "DTC U1000, U1001 CAN COMMUNICATION LINE"
●
If DTC P0462 or P0463 is displayed with DTC U1010, first perform the trouble diagnosis for DTC
U1010. Refer to
EC-868, "DTC U1010 CAN COMMUNICATION"
.
This diagnosis indicates the former, to detect open or short circuit malfunction.
DTC Confirmation Procedure
NBS005J1
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 battery voltage is more than 11V at ignition
switch ON.
WITH CONSULT-II
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
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
PBIB2707E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0462
0462
Fuel level sensor circuit
low input
An excessively low voltage from the sensor is
sent to ECM.
●
Harness or connectors
(The CAN communication line is open or
shorted)
●
Harness or connectors
(The sensor circuit is open or shorted)
●
Unified meter and A/C amp.
●
Fuel level sensor
P0463
0463
Fuel level sensor circuit
high input
An excessively high voltage from the sensor is
sent to ECM.
SEF195Y