Infiniti M35/M45 Y50. Manual — part 671
DTC P0455 EVAP CONTROL SYSTEM
EC-1157
[VK45DE]
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EC
9.
CHECK FOR EVAP LEAK
With CONSULT-II
1.
Turn ignition switch ON.
2.
Select “EVAP SYSTEM CLOSE” of “WORK SUPPORT” mode
with CONSULT-II.
3.
Touch “START” and apply pressure into the EVAP line until the
pressure indicator reaches the middle of the bar graph.
CAUTION:
●
Do not use compressed air or a high pressure pump.
●
Do not exceed 4.12 kPa (0.042 kg/cm
2
, 0.6 psi) of pres-
sure in the system.
4.
Using EVAP leak detector, locate the EVAP leak. For the leak
detector, refer to the instruction manual for more details.
Refer to
EC-742, "EVAPORATIVE EMISSION LINE DRAWING"
.
OK or NG
OK
>> GO TO 11.
NG
>> Repair or replace.
10.
CHECK FOR EVAP LEAK
Without CONSULT-II
1.
Turn ignition switch OFF.
2.
Apply 12 volts DC to EVAP canister vent control valve (1). The
valve will close. (Continue to apply 12 volts until the end of test.)
–
Illustration shows the view from under the vehicle
–
: Vehicle front
–
EVAP canister (2)
–
EVAP control system pressure sensor (3)
3.
Pressurize the EVAP line using pressure pump with 1.3 to 2.7
kPa (10 to 20 mmHg, 0.39 to 0.79 inHg), then remove pump and
EVAP service port adapter.
CAUTION:
●
Do not use compressed air or a high pressure pump.
●
Do not exceed 4.12 kPa (0.042 kg/cm
2
, 0.6 psi) of pressure in the system.
4.
Using EVAP leak detector, locate the EVAP leak. For the leak
detector, refer to the instruction manual for more details. Refer
to
EC-742, "EVAPORATIVE EMISSION LINE DRAWING"
OK or NG
OK
>> GO TO 12.
NG
>> Repair or replace.
PEF917U
SEF200U
PBIB2702E
SEF200U
EC-1158
[VK45DE]
DTC P0455 EVAP CONTROL SYSTEM
11.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
With CONSULT-II
1.
Disconnect vacuum hose to EVAP canister purge volume control solenoid valve at EVAP service port.
2.
Start engine.
3.
Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode.
4.
Touch “Qu” on CONSULT-II screen to increase “PURG VOL
CONT/V” opening to 100%.
5.
Check vacuum hose for vacuum when revving engine up to
2,000 rpm.
OK or NG
OK
>> GO TO 14.
NG
>> GO TO 13.
12.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
Without CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Stop engine.
3.
Disconnect vacuum hose to EVAP canister purge volume control solenoid valve at EVAP service port.
4.
Start engine and let it idle for at least 80 seconds.
5.
Check vacuum hose for vacuum when revving engine up to 2,000 rpm.
OK or NG
OK
>> GO TO 15.
NG
>> GO TO 13.
13.
CHECK VACUUM HOSE
Check vacuum hoses for clogging or disconnection. Refer to
OK or NG
OK (With CONSULT-II)>>GO TO 14.
OK (Without CONSULT-II)>>GO TO 15.
NG
>> Repair or reconnect the hose.
14.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT-II
1.
Start engine.
2.
Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with
CONSULT-II. Check that engine speed varies according to the
valve opening.
OK or NG
OK
>> GO TO 16.
NG
>> GO TO 15.
PBIB1678E
Vacuum should exist.
PBIB1678E
DTC P0455 EVAP CONTROL SYSTEM
EC-1159
[VK45DE]
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15.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Refer to
EC-1121, "Component Inspection"
OK or NG
OK
>> GO TO 16.
NG
>> Replace EVAP canister purge volume control solenoid valve.
16.
CHECK FUEL TANK TEMPERATURE SENSOR
Refer to
EC-1048, "Component Inspection"
.
OK or NG
OK
>> GO TO 17.
NG
>> Replace fuel level sensor unit.
17.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to
EC-1144, "Component Inspection"
OK or NG
OK
>> GO TO 18.
NG
>> Replace EVAP control system pressure sensor.
18.
CHECK EVAP/ORVR LINE
Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kink, looseness and improper con-
nection. For location, refer to
EC-748, "ON BOARD REFUELING VAPOR RECOVERY (ORVR)"
OK or NG
OK
>> GO TO 19.
NG
>> Repair or replace hoses and tubes.
19.
CHECK RECIRCULATION LINE
Check recirculation line between filler neck tube and fuel tank for clogging, kink, cracks, looseness and
improper connection.
OK or NG
OK
>> GO TO 20.
NG
>> Repair or replace hose, tube or filler neck tube.
20.
CHECK REFUELING EVAP VAPOR CUT VALVE
Refer to
EC-751, "REFUELING EVAP VAPOR CUT VALVE"
.
OK or NG
OK
>> GO TO 21.
NG
>> Replace refueling EVAP vapor cut valve with fuel tank.
21.
CHECK INTERMITTENT INCIDENT
Refer to
EC-857, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
EC-1160
[VK45DE]
DTC P0456 EVAP CONTROL SYSTEM
DTC P0456 EVAP CONTROL SYSTEM
PFP:14950
On Board Diagnosis Logic
NBS005IL
This diagnosis detects very small leaks in the EVAP line between fuel tank and EVAP canister purge volume
control solenoid valve, using the intake manifold vacuum in the same way as conventional EVAP small leak
diagnosis.
If ECM judges a leak which corresponds to a very small leak, the very small leak P0456 will be detected.
If ECM judges a leak equivalent to a small leak, EVAP small leak P0442 will be detected.
If ECM judges there are no leaks, the diagnosis will be OK.
PBIB1026E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0456
0456
Evaporative emission
control system very
small leak (negative
pressure check)
●
EVAP system has a very small leak.
●
EVAP system does not operate
properly.
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Incorrect fuel tank vacuum relief valve
●
Incorrect fuel filler cap used
●
Fuel filler cap remains open or fails to close.
●
Foreign matter caught in fuel filler cap.
●
Leak is in line between intake manifold and EVAP
canister purge volume control solenoid valve.
●
Foreign matter caught in EVAP canister vent control
valve.
●
EVAP canister or fuel tank leaks
●
EVAP purge line (pipe and rubber tube) leaks
●
EVAP purge line rubber tube bent
●
Loose or disconnected rubber tube
●
EVAP canister vent control valve and the circuit
●
EVAP canister purge volume control solenoid valve
and the circuit
●
Fuel tank temperature sensor
●
O-ring of EVAP canister vent control valve is missing
or damaged
●
EVAP canister is saturated with water
●
EVAP control system pressure sensor
●
Refueling EVAP vapor cut valve
●
ORVR system leaks
●
Fuel level sensor and the circuit
●
Foreign matter caught in EVAP canister purge vol-
ume control solenoid valve
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