Infiniti M35/M45 Y50. Manual — part 498
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DTC P0461 FUEL LEVEL SENSOR
EC-465
[VQ35DE]
C
D
E
F
G
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K
L
M
A
EC
6.
Select “FUEL LEVEL SE” in “DATA MONITOR” mode with CON-
SULT-II.
7.
Check “FUEL LEVEL SE” output voltage and note it.
8.
Select “FUEL PUMP” in “ACTIVE TEST” mode with CONSULT-
II.
9.
Touch “ON” and drain fuel approximately 30 (7-7/8 US gal, 6-
5/8 Imp gal) and stop it.
10. Check “FUEL LEVEL SE” output voltage and note it.
11. Fill fuel into the fuel tank for 30 (7-7/8 US gal, 6-5/8 Imp gal).
12. Check “FUEL LEVEL SE” output voltage and note it.
13. Confirm whether the voltage changes more than 0.03V during step 7 to 10 and 10 to 12.
EC-465, "Diagnostic Procedure"
WITH GST
NOTE:
Start from step 8, if it is possible to confirm that the fuel cannot be drained by 30 (7-7/8 US gal, 6-5/8
Imp gal) in advance.
1.
Prepare a fuel container and a spare hose.
2.
Release fuel pressure from fuel line. Refer to
EC-88, "FUEL PRESSURE RELEASE"
3.
Remove the fuel feed hose on the fuel level sensor unit.
4.
Connect a spare fuel hose where the fuel feed hose was removed.
5.
Turn ignition switch ON.
6.
Drain fuel by 30 (7-7/8 US gal, 6-5/8 Imp gal) from the fuel tank using proper equipment.
7.
Confirm that the fuel gauge indication varies.
8.
Fill fuel into the fuel tank for 30 (7-7/8 US gal, 6-5/8 Imp gal).
9.
Confirm that the fuel gauge indication varies.
EC-465, "Diagnostic Procedure"
Diagnostic Procedure
NBS0051H
1.
CHECK DTC WITH “UNIFIED METER AND A/C AMP.”
Refer to
OK or NG
OK
>> GO TO 2.
NG
DI-22, "Fuel Level Sensor Signal Inspection"
.
2.
CHECK INTERMITTENT INCIDENT
Refer to
EC-153, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
Removal and Installation
NBS0051I
FUEL LEVEL SENSOR
Refer to
FL-4, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY"
SEF195Y
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EC-466
[VQ35DE]
DTC P0462, P0463 FUEL LEVEL SENSOR CIRCUIT
DTC P0462, P0463 FUEL LEVEL SENSOR CIRCUIT
PFP:25060
Component Description
NBS0051J
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
NBS0051K
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-161, "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-164, "DTC U1010 CAN COMMUNICATION"
.
This diagnosis indicates the former, to detect open or short circuit malfunction.
DTC Confirmation Procedure
NBS0051L
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-467, "Diagnostic Procedure"
.
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
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DTC P0462, P0463 FUEL LEVEL SENSOR CIRCUIT
EC-467
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
Diagnostic Procedure
NBS0051M
1.
CHECK DTC WITH “UNIFIED METER AND A/C AMP.”
Refer to
OK or NG
OK
>> GO TO 2.
NG
DI-22, "Fuel Level Sensor Signal Inspection"
.
2.
CHECK INTERMITTENT INCIDENT
Refer to
EC-153, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
Removal and Installation
NBS0051N
FUEL LEVEL SENSOR
Refer to
FL-4, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY"
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EC-468
[VQ35DE]
DTC P0500 VSS
DTC P0500 VSS
PFP:32702
Description
NBS0051O
NOTE:
●
If DTC P0500 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis for DTC
U1000, U1001. Refer to
EC-161, "DTC U1000, U1001 CAN COMMUNICATION LINE"
●
If DTC P0500 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010.
Refer to
EC-164, "DTC U1010 CAN COMMUNICATION"
.
The vehicle speed signal is sent to the “unified meter and A/C amp.” from the “ABS actuator and electric unit
(control unit)” by CAN communication line. The “unified meter and A/C amp.” then sends a signal to the ECM
by CAN communication line.
On Board Diagnosis Logic
NBS0051P
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode.
DTC Confirmation Procedure
NBS0051Q
CAUTION:
Always drive vehicle at a safe speed.
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:
Steps 1 and 2 may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a
road test is expected to be easier, it is unnecessary to lift the vehicle.
WITH CONSULT-II
1.
Start engine (VDC switch OFF).
2.
Read “VHCL SPEED SE” in “DATA MONITOR” mode with CONSULT-II. The vehicle speed on CONSULT-
II should exceed 10 km/h (6 MPH) when rotating wheels with suitable gear position.
If NG, go to
EC-469, "Diagnostic Procedure"
If OK, go to following step.
3.
Select “DATA MONITOR” mode with CONSULT-II.
4.
Warm engine up to normal operating temperature.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0500
0500
Vehicle speed sensor
The almost 0 km/h (0 MPH) signal from
vehicle speed sensor is sent to ECM
even when vehicle is being driven.
●
Harness or connectors
(The CAN communication line is open or
shorted)
●
Harness or connectors
(The vehicle speed signal circuit is open or
shorted)
●
Wheel sensor
●
Unified meter and A/C amp.
●
ABS actuator and electric unit (control unit)
Detected items
Engine operating condition in fail-safe mode
Vehicle speed sensor
When the fail-safe system for vehicle speed sensor is activated, the cooling fan operates (Highest)
while engine is running.
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