Nissan Quest E52. Instruction — part 918
MWI
FUEL LEVEL SENSOR SIGNAL CIRCUIT
MWI-77
< DTC/CIRCUIT DIAGNOSIS >
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FUEL LEVEL SENSOR SIGNAL CIRCUIT
Description
INFOID:0000000009864291
The fuel level sensor unit and fuel pump (fuel level sensor) detect the fuel level in the fuel tank and transmit
the fuel gauge signal to the combination meter.
Component Function Check
INFOID:0000000009864292
1.
PERFORM COMPONENT FUNCTION CHECK (1)
1.
Turn ignition switch OFF.
2.
Disconnect fuel level sensor unit and fuel pump (fuel level sensor) connector.
3.
Connect variable resistor between harness connector terminals located on the vehicle side of the fuel
level sensor unit and fuel pump (fuel level sensor).
4.
Set variable resistor according to the resistance value shown in the following table and turn ignition switch
ON.
*: Reference resistance values used when the combination meter judges the indication position of the fuel
gauge.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Refer to
.
2.
PERFORM COMPONENT FUNCTION CHECK (2)
Check the fuel level sensor unit and fuel pump (fuel level sensor). Refer to
MWI-78, "Component Inspection"
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace the fuel level sensor unit and fuel pump (fuel level sensor). Refer to
Diagnosis Procedure
INFOID:0000000009651514
1.
CHECK FUEL LEVEL SENSOR UNIT AND FUEL PUMP (FUEL LEVEL SENSOR) CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect combination meter connector and fuel level sensor unit and fuel pump (fuel level sensor) con-
nector.
3.
Check continuity between combination meter harness connector and fuel level sensor unit and fuel pump
(fuel level sensor) harness connector.
Fuel level sensor unit and fuel pump (fuel level sensor)
Connector
Terminals
B40
2
5
Resistance (
Ω
)
*
(Approx.)
Fuel gauge indication position
(Approx.)
Less than 94
Full
140
3/4
186
1/2
232
1/4
More than 278
Empty
Combination meter
Fuel level sensor unit and fuel
pump (fuel level sensor)
Continuity
Connector
Terminal
Connector
Terminal
M34
34
B40
2
Existed
MWI-78
< DTC/CIRCUIT DIAGNOSIS >
FUEL LEVEL SENSOR SIGNAL CIRCUIT
4.
Check continuity between combination meter harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair harness or connector.
2.
CHECK FUEL LEVEL SENSOR UNIT AND FUEL PUMP (FUEL LEVEL SENSOR) GROUND CIRCUIT
1.
Check continuity between fuel level sensor unit and fuel pump (fuel level sensor) harness connector and
combination meter harness connector.
2.
Check continuity between fuel level sensor unit and fuel pump (fuel level sensor) harness connector and
ground.
Is the inspection result normal?
YES
>> Replace combination meter. Refer to
MWI-93, "Removal and Installation"
NO
>> Repair harness or connector.
Component Inspection
INFOID:0000000009651515
1.
CHECK FUEL LEVEL SENSOR UNIT AND FUEL PUMP (FUEL LEVEL SENSOR)
1.
Remove the fuel level sensor unit and fuel pump (fuel level sensor). Refer to
2.
Check the resistance between fuel level sensor unit and fuel
pump (fuel level sensor).
*: When float rod is contact with stopper.
Is inspection result OK?
YES
>> INSPECTION END
NO
>> Replace fuel level sensor unit and fuel pump (fuel level sensor). Refer to
Combination meter
Ground
Continuity
Connector
Terminal
M34
34
Not existed
Fuel level sensor unit and fuel
pump (fuel level sensor)
Combination meter
Continuity
Connector
Terminal
Connector
Terminal
B40
5
M34
24
Existed
Fuel level sensor unit and fuel
pump (fuel level sensor)
Ground
Continuity
Connector
Terminal
B40
5
Not existed
Terminals
Condition
Resistance (
Ω
)
(Approx.)
Height [mm (in)]
Fuel level sensor unit
and fuel pump (fuel
level sensor)
2
5
Full
*
(A)
51
133.0 (5.24)
Empty
*
(B)
283
15.7 (0.618)
JSNIA3344ZZ
MWI
OIL PRESSURE SWITCH SIGNAL CIRCUIT
MWI-79
< DTC/CIRCUIT DIAGNOSIS >
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OIL PRESSURE SWITCH SIGNAL CIRCUIT
Component Function Check
INFOID:0000000009651516
1.
CHECK COMBINATION METER INPUT SIGNAL
Select the “Data Monitor” for the “METER/M&A” and check the “OIL W/L” monitor value.
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009651517
1.
CHECK OIL PRESSURE SWITCH CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect IPDM E/R connector and oil pressure switch connector.
3.
Check continuity between IPDM E/R harness connector and oil pressure switch harness connector.
4.
Check continuity between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair harness or connector.
Component Inspection
INFOID:0000000009651518
1.
CHECK OIL PRESSURE SWITCH
Check continuity between oil pressure switch and ground.
Is the inspection result normal?
YES
>> INSPECTION END
“OIL W/L”
Ignition switch ON
: On
Engine running
: Off
Terminals
Continuity
(+)
(
−
)
IPDM E/R
Oil pressure switch
Connector
Terminal
Connector
Terminal
F12
75
F63
1
Existed
Terminals
Continuity
(+)
(
−
)
IPDM E/R
Ground
Connector
Terminal
F12
75
Not existed
Condition
Continuity
Engine stopped
Existed
Engine running
Not existed
ELF0044D
MWI-80
< DTC/CIRCUIT DIAGNOSIS >
OIL PRESSURE SWITCH SIGNAL CIRCUIT
NO
>> Replace oil pressure switch. Refer to
.
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