Nissan Frontier. Manual — part 556
P0455 EVAP CONTROL SYSTEM
EC-795
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR USA AND CANADA]
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2.
CHECK FUEL FILLER CAP INSTALLATION
Check that the cap is tightened properly by rotating the cap clockwise.
OK or NG
OK
>> GO TO 3.
NG
>> 1. Open fuel filler cap, then clean cap and fuel filler neck threads using air blower.
2. Retighten until ratcheting sound is heard.
3.
CHECK FUEL FILLER CAP FUNCTION
Check for air releasing sound while opening the fuel filler cap.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
4.
CHECK FUEL TANK VACUUM RELIEF VALVE
OK or NG
OK
>> GO TO 5.
NG
>> Replace fuel filler cap with a genuine one.
5.
CHECK EVAP PURGE LINE
Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks, improper connection or
disconnection.
OK or NG
OK
>> GO TO 6.
NG
>> Repair or reconnect the hose.
6.
CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.
>> GO TO 7.
7.
CHECK EVAP CANISTER VENT CONTROL VALVE
Check the following.
• EVAP canister vent control valve is installed properly.
FL-14, "Removal and Installation"
• EVAP canister vent control valve.
.
OK or NG
OK
>> GO TO 8.
NG
>> Repair or replace EVAP canister vent control valve and O-ring.
8.
INSTALL THE PRESSURE PUMP
To locate the EVAP leak, install EVAP service port adapter and pres-
sure pump to EVAP service port securely.
NOTE:
Improper installation of the EVAP service port adapter to the
EVAP service port may cause leaking.
BBIA0550E
EC-796
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR USA AND CANADA]
P0455 EVAP CONTROL SYSTEM
With CONSULT>>GO TO 9.
Without CONSULT>>GO TO 10.
9.
CHECK FOR EVAP LEAK
With CONSULT
1. Turn ignition switch ON.
2. Select “EVAP SYSTEM CLOSE” of “WORK SUPPORT” mode with CONSULT.
3. Touch “START” and apply pressure into the EVAP line until the pressure indicator reaches the middle of
the bar graph.
CAUTION:
• Never use compressed air or a high pressure pump.
• Never 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.
OK or NG
OK
>> GO TO 11.
NG
>> Repair or replace.
10.
CHECK FOR EVAP LEAK
Without CONSULT
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.)
-
EVAP control system pressure sensor (2)
-
Drain filter (3)
-
EVAP canister (4)
-
: Vehicle front
3. Pressurize the EVAP line using pressure pump with 1.38 to 2.76
kPa (0.014 to 0.028 kg/cm
2
, 0.2 to 0.4 psi), then remove pump
and EVAP service port adapter.
CAUTION:
• Never use compressed air or a high pressure pump.
• Never exceed 4.12 kPa (0.042 kg/cm
2
, 0.6 psi) of pressure
in the system.
SEF916U
SEF200U
ALBIA0514ZZ
P0455 EVAP CONTROL SYSTEM
EC-797
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR USA AND CANADA]
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4. Using EVAP leak detector, locate the EVAP leak. For the leak
detector, refer to the instruction manual for more details. Refer
.
OK or NG
OK
>> GO TO 12.
NG
>> Repair or replace.
11.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
With CONSULT
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 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
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)>>GO TO 14.
OK (Without CONSULT)>>GO TO 15.
NG
>> Repair or reconnect the hose.
14.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT
1. Start engine.
2. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT. Check that engine speed varies
according to the valve opening.
OK or NG
OK
>> GO TO 16.
NG
>> GO TO 15.
15.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-771, "Component Inspection"
OK or NG
OK
>> GO TO 16.
NG
>> Replace EVAP canister purge volume control solenoid valve. Refer to
.
SEF200U
Vacuum should exist.
EC-798
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR USA AND CANADA]
P0455 EVAP CONTROL SYSTEM
16.
CHECK FUEL TANK TEMPERATURE SENSOR
EC-716, "Component Inspection"
OK or NG
OK
>> GO TO 17.
NG
>> Replace fuel level sensor unit. Refer to
FL-10, "Removal and Installation"
17.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-786, "Component Inspection"
OK or NG
OK
>> GO TO 18.
NG
>> Replace EVAP control system pressure sensor. Refer to
FL-14, "Removal and Installation"
.
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
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. Refer to
FL-6, "Removal and Installation"
20.
CHECK REFUELING EVAP VAPOR CUT VALVE
EC-943, "Component Inspection"
OK or NG
OK
>> GO TO 21.
NG
>> Replace refueling EVAP vapor cut valve with fuel tank. Refer to
FL-6, "Removal and Installation"
.
21.
CHECK INTERMITTENT INCIDENT
GI-42, "Intermittent Incident"
>> INSPECTION END
Component Inspection
INFOID:0000000009481456
FUEL TANK VACUUM RELIEF VALVE (BUILT INTO FUEL FILLER CAP)
1. Wipe clean valve housing.
SEF445Y
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