Nissan Maxima. Instruction — part 473
E C -3 7 6
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P0462, P0463 FUEL LEVEL SENSOR
P0462, P0463 FUEL LEVEL SENSOR
Description
INFOID:0000000010095050
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 combination meter. The combina-
tion meter sends the fuel level sensor signal to the ECM via the CAN communication line.
It consists of two parts, one is mechanical float and the other is variable resistor. Fuel level sensor output volt-
age changes depending on the movement of the fuel mechanical float.
DTC Logic
INFOID:0000000010095051
DTC DETECTION LOGIC
NOTE:
• If DTC P0462 or P0463 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC
• If DTC P0462 or P0463 is displayed with DTC P0607, first perform the trouble diagnosis for DTC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V at ignition
switch ON.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON and wait at least 5 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010095052
1.
CHECK COMBINATION METER FUNCTION
MWI-29, "CONSULT Function (METER/M&A)"
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Go to
MWI-40, "Component Function Check"
.
2.
CHECK INTERMITTENT INCIDENT
GI-41, "Intermittent Incident"
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0462
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.)
• Combination meter
• Fuel level sensor
P0463
Fuel level sensor circuit
high input
An excessively high voltage from the sensor is
sent to ECM.
P0462, P0463 FUEL LEVEL SENSOR
EC-377
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
>> INSPECTION END
EC-378
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P0500 VSS
P0500 VSS
Description
INFOID:0000000010095053
ECM receives vehicle speed signals from two different paths via CAN communication line: One is from the
ABS actuator and electric unit (control unit) via the combination unit and the other is from TCM.
DTC Logic
INFOID:0000000010095054
DTC DETECTION LOGIC
NOTE:
• If DTC P0500 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
• If DTC P0500 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer to
.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC CONFIRMATION PROCEDURE has been previously conducted, always perform the following proce-
dure before conducting the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is 10 V or more at idle.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine.
2. Shift the selector lever to D range and wait at least for 2 seconds.
3. Drive the vehicle at least 5 seconds at 20 km/h (13 MPH) or more.
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
This procedure 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.
4. Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Proceed to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010095055
1.
CHECK DTC WITH TCM
Check DTC with TCM. Refer to
Is the inspection result normal?
YES
>> GO TO 2.
DTC No.
Trouble diagnosis
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P0500
VEH SPEED SEN/CIRC
(Vehicle speed sensor)
At 20 km/h (13 MPH), ECM detects the fol-
lowing status continuously for 5 seconds or
more: The difference between a vehicle
speed calculated by a secondary speed sen-
sor transmitted from TCM to ECM via CAN
communication and the vehicle speed indi-
cated on the combination meter exceeds
15km/h (10 MPH).
• Harness or connector
(The CAN communication line is open
or shorted.)
• Combination meter
• ABS actuator and electric unit (control
unit)
• Wheel sensor
• TCM
• Secondary speed sensor
P0500 VSS
EC-379
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
NO
>> Perform trouble shooting relevant to DTC indicated.
2.
CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Check DTC with ABS actuator and electric unit (control unit). Refer to
BRC-21, "CONSULT Function (ABS)"
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Perform trouble shooting relevant to DTC indicated.
3.
CHECK DTC WITH COMBINATION METER
Check DTC with combination meter. Refer to
MWI-29, "CONSULT Function (METER/M&A)"
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Perform trouble shooting relevant to DTC indicated.
4.
CHECK SECONDARY SPEED SENSOR
Check secondary speed sensor. Refer to
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace or replace error-detected parts.
5.
CHECK WHEEL SENSOR
Check wheel sensor. Refer to
.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
NO
>> Replace or replace error-detected parts.
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