2005 INFINITI FX35 Service Manual

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Page 1777 of 4731

INFINITI FX35 2005 Service Manual EC-384
[VQ35DE]
DTC P0456 EVAP CONTROL SYSTEM
Revision: 2005 July 2005 FX
20. CHECK EVAP/ORVR LINE
Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kink, looseness and improper

Page 1778 of 4731

INFINITI FX35 2005 Service Manual DTC P0460 FUEL LEVEL SENSOR EC-385
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EC
Revision: 2005 July 2005 FX
DTC P0460 FUEL LEVEL SENSORPFP:25060
Component DescriptionABS006RT
The fuel level sensor

Page 1779 of 4731

INFINITI FX35 2005 Service Manual EC-386
[VQ35DE]
DTC P0460 FUEL LEVEL SENSOR
Revision: 2005 July 2005 FX
Diagnostic ProcedureABS006RW
1. CHECK DTC WITH “UNIFIED METER AND A/C AMP.”
Refer to DI-32, "
SELF-DIAGNOSTIC RESULTS" .

Page 1780 of 4731

INFINITI FX35 2005 Service Manual DTC P0461 FUEL LEVEL SENSOR EC-387
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Revision: 2005 July 2005 FX
DTC P0461 FUEL LEVEL SENSORPFP:25060
Component DescriptionABS006RY
The fuel level sensor

DTC P0461 FUEL LEVEL SENSOR EC-387
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Revision: 2005 July 2005 FX
DTC P0461 FUEL LEVEL SENSORPFP:25060
Component DescriptionABS006RY
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 commu-
nication 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.
On Board Diagnosis LogicABS006RZ
NOTE:
If DTC P0461 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis for DTC U1000,
U1001. Refer to EC-171
.
Driving long distances naturally affect fuel gauge level.
This diagnosis detects the fuel gauge malfunction of the gauge not moving even after a long distance has
been driven.
Overall Function CheckABS006S0
Use this procedure to check the overall function of the fuel level sensor function. During this check, a 1st trip
DTC might not be confirmed.
WARNING:
When performing following procedure, be sure to observe the handling of the fuel. Refer to FL-10,
"FUEL TANK" .
TESTING CONDITION:
Before starting overall function check, preparation of draining fuel and refilling fuel is required.
WITH CONSULT-II
NOTE:
Start from step 10, 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-99, "
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 OFF and wait at least 10 seconds then turn ON.
6. Select “FUEL LEVEL SE” in “DATA MONITOR” mode with CONSULT-II.
PBIB1569E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0461
0461 Fuel level sensor circuit
range/performance The output signal of the fuel level sensor does
not change within the specified range even
though the vehicle has been driven a long dis-
tance.
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

Page 1781 of 4731

INFINITI FX35 2005 Service Manual EC-388
[VQ35DE]
DTC P0461 FUEL LEVEL SENSOR
Revision: 2005 July 2005 FX
7. Check “FUEL LEVEL SE” output voltage and note it.
8. Select “FUEL PUMP” in “ACTIVE TEST” mode with CONSULT- II.

Page 1782 of 4731

INFINITI FX35 2005 Service Manual DTC P0462, P0463 FUEL LEVEL SENSOR EC-389
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Revision: 2005 July 2005 FX
DTC P0462, P0463 FUEL LEVEL SENSORPFP:25060
Component DescriptionABS006S3
The fue

DTC P0462, P0463 FUEL LEVEL SENSOR EC-389
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Revision: 2005 July 2005 FX
DTC P0462, P0463 FUEL LEVEL SENSORPFP:25060
Component DescriptionABS006S3
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 commu-
nication 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.
On Board Diagnosis LogicABS006S4
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-171
.
This diagnosis indicates the former, to detect open or short circuit malfunction.
DTC Confirmation ProcedureABS006S5
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-390, "
Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
PBIB1569E
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

Page 1783 of 4731

INFINITI FX35 2005 Service Manual EC-390
[VQ35DE]
DTC P0462, P0463 FUEL LEVEL SENSOR
Revision: 2005 July 2005 FX
Diagnostic ProcedureABS006S7
1. CHECK DTC WITH “UNIFIED METER AND A/C AMP.”
Refer to DI-32, "
SELF-DIAGNOSTIC RESU

Page 1784 of 4731

INFINITI FX35 2005 Service Manual DTC P0500 VSS EC-391
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Revision: 2005 July 2005 FX
DTC P0500 VSSPFP:32702
DescriptionABS006S9
NOTE:
If DTC P0500 is displayed with DTC U1000 or U1001, f

DTC P0500 VSS EC-391
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Revision: 2005 July 2005 FX
DTC P0500 VSSPFP:32702
DescriptionABS006S9
NOTE:
If DTC P0500 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis for DTC U1000,
U1001. Refer to EC-171
.
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 LogicABS006SA
DTC Confirmation ProcedureABS006SB
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 (TCS switch or 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-392, "
Diagnostic Procedure" .
If OK, go to following step.
3. Select “DATA MONITOR” mode with CONSULT-II.
4. Warm engine up to normal operating temperature.
5. Maintain the following conditions for at least 60 consecutive sec- onds.
6. If 1st trip DTC is detected, go to EC-392, "
Diagnostic Procedure"
.
Overall Function CheckABS006SC
Use this procedure to check the overall function of the vehicle speed sensor circuit. During this check, a 1st
trip DTC might not be confirmed.
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)
ENG SPEED 1,700 - 6,000 rpm
COOLAN TEMP/S More than 70 °C (158 °F)
B/FUEL SCHDL 4.9 - 31.8 msec
Selector lever Except P or N position
PW/ST SIGNAL OFF
SEF196Y

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