Nissan Frontier D22. Manual - part 348

 

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Nissan Frontier D22. Manual - part 348

 

 

DTC P1456 EVAP CONTROL SYSTEM

EC-495

[KA24DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

17. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

 With CONSULT-II

Check air passage continuity of EVAP canister purge volume control
solenoid valve under the following conditions.

 Without CONSULT-II

Check air passage continuity of EVAP canister purge volume control
solenoid valve under the following conditions.

OK or NG

OK

>> GO TO 18.

NG

>> Replace EVAP canister purge volume control solenoid valve.

SEF339V

SEF334X

SEF339V

SEF335X

EC-496

[KA24DE]

DTC P1456 EVAP CONTROL SYSTEM

18. 

CHECK FUEL TANK TEMPERATURE SENSOR

1.

Remove fuel level sensor unit.

2.

Check resistance between fuel level sensor unit and fuel pump
terminals 2 and 4 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.

Use pump to apply vacuum and pressure to EVAP control system pressure sensor as shown in figure.

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, 29.56

inHg) of pressure.

4.

Check output voltage between ECM terminal 62 and engine
ground.

CAUTION:

Discard any EVAP control system pressure sensor which
has been dropped from a height of more than 0.5 m (19.7 in)
onto a hard surface such as a concrete floor; use a new
one.

OK or NG

OK

>> GO TO 20.

NG

>> Replace EVAP control system pressure sensor.

Temperature 

°C (°F)

Resistance k

20 (68)

2.3 - 2.7

50 (122)

0.79 - 0.90

SEF852Z

SEF341V

Applied vacuum kPa (mmHg, inHg)

Voltage [V]

Not applied

1.8 - 4.8

-26.7 (-200, -7.87)

 2.1 to 2.5V lower than above value

SEF198V

DTC P1456 EVAP CONTROL SYSTEM

EC-497

[KA24DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

20. 

CHECK EVAP PURGE LINE

Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks or improper connec-
tion.
Refer to 

EC-565, "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.

22. 

CHECK FUEL LEVEL SENSOR

Refer to 

DI-18, "FUEL LEVEL SENSOR UNIT CHECK"

 .

OK or NG

OK

>> GO TO 23.

NG

>> Replace fuel level sensor unit.

23. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-120, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END.

EC-498

[KA24DE]

DTC P1464 FUEL LEVEL SENSOR

DTC P1464 FUEL LEVEL SENSOR

PFP:25060

Component Description

UBS00DBV

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 Diagnostic Logic

UBS00DBW

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

UBS00DBX

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.

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-500, "Diagnostic Procedure"

.

WITH GST

Follow the procedure “WITH CONSULT-II” above.

SEF725Z

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

 

 

 

 

 

 

 

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