Infiniti M35/M45 Y50. Manual — part 360
COMBINATION METERS
DI-23
C
D
E
F
G
H
I
J
L
M
A
B
DI
1.
CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL
1.
Select “METER A/C AMP” on CONSULT-II.
2.
Using “FUEL METER” on “DATA MONITOR”, compare the value
of “DATA MONITOR” to the indication of fuel gauge of combina-
tion meter.
OK or NG
OK
>> GO TO 2.
NG
>> Replace combination meter.
2.
CHECK FUEL LEVEL SENSOR
1.
Turn ignition switch OFF.
2.
DI-26, "CHECK FUEL LEVEL SENSOR UNIT"
OK or NG
OK
>> GO TO 3.
NG
>> Replace fuel level sensor unit.
3.
CHECK FUEL LEVEL SENSOR (SUB) CIRCUIT
1.
Disconnect unified meter and A/C amp. connector and fuel level
sensor unit (sub) connector.
2.
Check continuity between unified meter and A/C amp. harness
connector (A) and fuel level sensor unit (sub) harness connector
(B).
3.
Check continuity between unified meter and A/C amp. harness
connector (A) and ground.
OK or NG
OK
>> GO TO 4.
NG
>> Repair harness or connector.
Fuel gauge pointer
Reference value of data monitor [lit.]
Full
Approx. 74
Three quarters
Approx. 61
Half
Approx. 42
A quarter
Approx. 22
Empty
Approx. 8
PKIA2088E
A
B
Continuity
Connector
Terminal
Connector
Terminal
M65
42
B52
1
Yes
A
Ground
Continuity
Connector
Terminal
M65
42
No
PKIB7642E
DI-24
COMBINATION METERS
4.
CHECK FUEL LEVEL SENSOR (MAIN-SUB) CIRCUIT
1.
Disconnect fuel level sensor unit and fuel pump (main) connec-
tor.
2.
Check continuity between fuel level sensor unit (sub) harness
connector (A) and fuel level sensor unit and fuel pump (main)
harness connector (B).
3.
Check continuity between fuel level sensor unit (sub) harness
connector (A) and ground.
OK or NG
OK
>> GO TO 5.
NG
>> Repair harness or connector.
5.
CHECK FUEL LEVEL SENSOR (MAIN) CIRCUIT
Check continuity between fuel level sensor unit and fuel pump
(main) harness connector (A) and unified meter and A/C amp. har-
ness connector (B).
OK or NG
OK
>> GO TO 6.
NG
>> Repair harness or connector.
6.
CHECK INSTALLATION CONDITION
Check fuel level sensor unit installation, and check whether the float arm interferes or binds with any of the
internal components in the fuel tank.
OK or NG
OK
>> Replace unified meter and A/C amp.
NG
>> Install the fuel level sensor unit properly.
A
B
Continuity
Connector
Terminal
Connector
Terminal
B52
2
B433
2
Yes
A
Ground
Continuity
Connector
Terminal
B52
2 No
PKIB7643E
A
B
Continuity
Connector
Terminal
Connector
Terminal
B433
5
M65
58
Yes
PKIB7644E
COMBINATION METERS
DI-25
C
D
E
F
G
H
I
J
L
M
A
B
DI
Fuel Gauge Pointer Fluctuates, Indicator Wrong Value or Varies
NKS003UB
1.
CHECK FUEL GAUGE FLUCTUATION
Test drive vehicle to see if gauge fluctuates only during driving or at the instant of stopping.
Does the indication value vary only during driving or at the instant of stopping?
YES
>> The pointer fluctuation may be caused by fuel level change in the fuel tank. Condition is normal.
NO
>> Ask the customer about the situation when the symptom occurs in detail, and perform the trouble
diagnosis.
Fuel Gauge Does Not Move to FULL Position
NKS003UC
1.
QUESTION 1
Does it take a long time for the pointer to move to FULL position?
YES
>> GO TO 2.
NO
>> GO TO 3.
2.
QUESTION 2
Was the vehicle fueled with the ignition switch ON?
YES
>> Be sure to fuel the vehicle with the ignition switch OFF. Otherwise, it will take a long time to move
to FULL position because of the characteristic of the fuel gauge.
NO
>> GO TO 3.
3.
QUESTION 3
Is the vehicle parked on an incline?
YES
>> Check the fuel level indication with vehicle on a level surface.
NO
>> GO TO 4.
4.
QUESTION 4
During driving, does the fuel gauge pointer move gradually toward EMPTY position?
YES
>> Check the fuel level sensor unit. Refer to
DI-26, "CHECK FUEL LEVEL SENSOR UNIT"
.
NO
>> The float arm may interfere or bind with any of the components in the fuel tank.
DI-26
COMBINATION METERS
Electrical Components Inspection
NKS003UD
CHECK FUEL LEVEL SENSOR UNIT
FL-4, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY"
Check Fuel Level Sensor Unit and Fuel Pump (Main)
Check resistance between terminals 2 and 5.
*1 and *2: When float rod is in contact with stopper.
●
If the results of check are NG, check the fuel level sensor unit
and fuel pump (main) harness. Refer to
Level Sensor Unit and Pump (Main) Harness"
Check Fuel Level Sensor Unit and Pump (Main) Harness
Check continuity at following terminals.
●
If the results of check are NG, replace fuel pump assembly. If the
results of check are OK, replace fuel level sensor unit.
Check Fuel Level Sensor Unit (Sub)
Check resistance between terminals 1 and 2.
*1 and *2: When float rod is in contact with stopper.
Terminal
Float position
[mm (in)]
Resistance value [
Ω
]
2
5
*1
Full
210 (8.27)
Approx. 3
*2
Empty
30 (1.18)
Approx. 80
SKIB3550J
Terminal
Continuity
2 - Signal terminal (A)
Yes
5 - Ground terminal (B)
SKIB3551J
Terminal
Float position
[mm (in)]
Resistance
value [
Ω
]
1
2
*1
Full
9 (0.35)
Approx. 3
*2
Empty
179 (7.05)
Approx. 43
SKIB2678J
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