Nissan Frontier D22. Instruction — part 320
DTC P0462, P0463 FUEL LEVEL SENSOR
EC-383
[KA24DE]
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EC
DTC P0462, P0463 FUEL LEVEL SENSOR
PFP:25060
Component Description
UBS00D8K
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 is vari-
able resistor. Fuel level sensor output voltage changes depending on
the movement of the fuel mechanical float.
On Board Diagnostic Logic
UBS00D8L
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.
Malfunction is detected when an excessively low (P0462) or high (P0463) voltage is sent from the sensor is
sent to ECM.
DTC Confirmation Procedure
UBS00D8M
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
EC-385, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
SEF725Z
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0462
Fuel level sensor circuit
low input
An excessively low voltage is sent from the
sensor is sent to ECM.
●
Fuel level sensor circuit
(The sensor circuit is open or shorted)
●
Fuel level sensor
P0463
Fuel level sensor circuit
high input
An excessively high voltage is sent from the
sensor is sent to ECM.
SEF195Y
EC-384
[KA24DE]
DTC P0462, P0463 FUEL LEVEL SENSOR
Wiring Diagram
UBS00D8N
BBWA1065E
DTC P0462, P0463 FUEL LEVEL SENSOR
EC-385
[KA24DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
Diagnostic Procedure
UBS00D8O
1.
CHECK FUEL LEVEL SENSOR POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect fuel level sensor unit and fuel pump harness connector.
3.
Disconnect ECM harness connector.
4.
Turn ignition switch ON.
5.
Check voltage between fuel level sensor unit terminal 1 and
ground, ECM terminal 46 and ground with CONSULT-II or tester.
OK or NG
OK
>> GO TO 3.
NG >> GO
TO
2.
2.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors M67, C1
●
Harness connectors M81, F36
●
Harness for open or short between combination meter and fuel level sensor unit
●
Harness for open or short between combination meter and ECM
>> Repair or replace harness or connectors.
3.
CHECK FUEL LEVEL SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Check harness continuity between fuel level sensor unit terminal 4 and body ground.
Refer to Wiring Diagram.
3.
Also check harness for short to power.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors M67, C1
●
Harness for open or short between fuel level sensor and body ground
>> Repair open circuit or short to power in harness or connectors.
Voltage : Battery voltage
SEF864Z
Continuity should exist.
EC-386
[KA24DE]
DTC P0462, P0463 FUEL LEVEL SENSOR
5.
CHECK FUEL LEVEL SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Check harness continuity between ECM terminal 46 and fuel level sensor unit terminal 1.
Refer to Wiring Diagram.
2.
Also check harness for short to power.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 6.
6.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors M81, F36
●
Harness connectors M67, C1
●
Harness for open or short between ECM and fuel level sensor
>> Repair open circuit or short to power in harness on connectors.
7.
CHECK FUEL LEVEL SENSOR
●
Refer to
DI-18, "FUEL LEVEL SENSOR UNIT CHECK"
OK or NG
OK
>> GO TO 8.
NG
>> Replace fuel level sensor unit.
8.
CHECK INTERMITTENT INCIDENT
●
Refer to
EC-120, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END.
Removal and Installation
UBS00D8P
FUEL LEVEL SENSOR
FL-6, "FUEL LEVEL SENSOR UNIT AND FUEL PUMP ASSEMBLY"
.
Continuity should exist.
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