Nissan Frontier D22. Manual — part 643
DTC P1456 EVAP CONTROL SYSTEM
EC-1675
[VG33ER]
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EC
18.
CHECK FUEL TANK TEMPERATURE SENSOR
1.
Remove fuel level sensor unit.
2.
Check resistance between fuel level sensor unit terminals T and E by heating with hot water or heat gun
as shown in the figure.
OK or NG
OK
>> GO TO 19.
NG
>> Replace fuel level sensor unit.
19.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
1.
Remove EVAP control system pressure sensor with its harness connector connected.
2.
Remove hose from EVAP control system pressure sensor.
3.
Turn ignition switch ON.
4.
Use pump to apply vacuum and pressure to EVAP control system pressure sensor as shown in figure.
5.
Check input voltage between ECM terminal 62 and ground.
CAUTION:
●
Always calibrate the vacuum pump gauge when using it.
●
Do not apply below
−93.3 kPa (−700 mmHg, −27.56 inHg)
or over 101.3 kPa (760 mmHg, 29.92 inHg) of pressure.
OK or NG
OK
>> GO TO 20.
NG
>> Replace EVAP control system pressure sensor.
20.
CHECK EVAP PURGE LINE
Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks or improper connection.
Refer to
EC-1741, "EVAPORATIVE EMISSION LINE DRAWING"
OK or NG
OK
>> GO TO 21.
NG
>> Repair or reconnect the hose.
21.
CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.
>> GO TO 22.
Temperature
°C (°F)
Resistance k
Ω
20 (68)
2.3 - 2.7
50 (122)
0.79 - 0.90
PBIB1425E
Applied vacuum
Voltage V
Not applied
1.8 - 4.8
-26.7 kpa (-200 mmHg, -7.87 inHg)
2.1 to 2.5V lower than above value
PBIB1426E
EC-1676
[VG33ER]
DTC P1456 EVAP CONTROL SYSTEM
22.
CHECK FUEL LEVEL SENSOR
DI-18, "FUEL LEVEL SENSOR UNIT CHECK"
.
OK or NG
OK
>> GO TO 23.
NG
>> Replace fuel level sensor unit.
23.
CHECK INTERMITTENT INCIDENT
EC-1297, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END.
DTC P1464 FUEL LEVEL SENSOR
EC-1677
[VG33ER]
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EC
DTC P1464 FUEL LEVEL SENSOR
PFP:25060
Component Description
UBS00E1N
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 ECM.
It consists of two parts, one is mechanical float and the other side is
variable resistor. Fuel level sensor output voltage changes depend-
ing on the movement of the fuel mechanical float.
On Board Diagnosis Logic
UBS00E1O
ECM receives two signals from the fuel level sensor.
One is fuel level sensor power supply circuit, and the other is fuel level sensor ground circuit.
This diagnosis indicates the latter to detect open circuit malfunction.
DTC Confirmation Procedure
UBS00E1P
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 5 seconds before conducting the next test.
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
WITH GST
Follow the procedure “WITH CONSULT-II” above.
SEF800Z
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1464
Fuel level sensor circuit
ground signal
A high voltage from the sensor is sent to ECM.
●
Harness or connectors
(The sensor circuit is open or shorted)
SEF195Y
EC-1678
[VG33ER]
DTC P1464 FUEL LEVEL SENSOR
Wiring Diagram
UBS00E1Q
BBWA1093E
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