fuel INFINITI FX35 2005 Repair Manual

EVAPORATIVE EMISSION SYSTEM EC-43
[VQ35DE]
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Revision: 2005 July 2005 FX
EVAP SERVICE PORT
Positive pressure is delivered to the EVAP system through the EVAP
service port. If fuel vapor leakage in the EVAP system occurs, use a
leak detector to locate the leak.
Removal and InstallationABS006Z9
EVAP CANISTER
Tighten EVAP canister as shown in the figure.
EVAP CANISTER VENT CONTROL VALVE
1. Turn EVAP canister vent control valve counterclockwise.
2. Remove the EVAP canister vent control valve.
Always replace O-ring with a new one.
How to Detect Fuel Vapor LeakageABS006ZA
CAUTION:

Never use compressed air or a high pressure pump.

Do not exceed 4.12 kPa (0.042 kg/cm2 , 0.6 psi) of pressure in EVAP system.
NOTE:

Do not start engine.

Improper installation of EVAP service port adapter to the EVAP service port may cause a leak.
SEF462UA
PBIB1029E
PBIB1030E

EC-46
[VQ35DE]
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
Revision: 2005 July 2005 FX
ON BOARD REFUELING VAPOR RECOVERY (ORVR)PFP:00032
System DescriptionABS006ZB
From the beginning of refueling, the air and vapor inside the fuel tank go through refueling EVAP vapor cut
valve and EVAP/ORVR line to the EVAP canister. The vapor is absorbed by the EVAP canister and the air is
released to the atmosphere.
When the refueling has reached the full level of the fuel tank, the refueling EVAP vapor cut valve is closed and
refueling is stopped because of auto shut-off. The vapor which was absorbed by the EVAP canister is purged
during driving.
WARNING:
When conducting inspections below, be sure to observe the following:

Put a “CAUTION: INFLAMMABLE” sign in workshop.

Do not smoke while servicing fuel system. Keep open flames and sparks away from work area.

Be sure to furnish the workshop with a CO2 fire extinguisher.
CAUTION:

Before removing fuel line parts, carry out the following procedures:
–Put drained fuel in an explosion-proof container and put lid on securely.
–Release fuel pressure from fuel line. Refer to Fuel Pressure Release, EC-99, "FUEL PRESSURE
RELEASE" .
–Disconnect battery ground cable.

Always replace O-ring when the fuel gauge retainer is removed.

Do not kink or twist hose and tube when they are installed.

Do not tighten hose and clamps excessively to avoid damaging hoses.

After installation, run engine and check for fuel leaks at connection.

Do not attempt to top off the fuel tank after the fuel pump nozzle shuts off automatically.
Continued refueling may cause fuel overflow, resulting in fuel spray and possibly a fire.
PBIB1068E

ON BOARD REFUELING VAPOR RECOVERY (ORVR) EC-47
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Revision: 2005 July 2005 FX
Diagnostic ProcedureABS006ZC
SYMPTOM: FUEL ODOR FROM EVAP CANISTER IS STRONG.
1. CHECK EVAP CANISTER
1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.
2. Weigh the EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.
The weight should be less than 2.1 kg (4.6 lb).
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2. CHECK IF EVAP CANISTER SATURATED WITH WATER
Does water drain from the EVAP canister?
Ye s o r N o
Ye s > > G O T O 3 .
No >> GO TO 5.
3. REPLACE EVAP CANISTER
Replace EVAP canister with a new one.
>> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check the EVAP hose between EVAP canister and vehicle frame for clogging or poor connection.
>> Repair or replace EVAP hose.
5. CHECK REFUELING EVAP VAPOR CUT VALVE
Refer to EC-49, "
Component Inspection" .
OK or NG
OK >> INSPECTION END
NG >> Replace refueling EVAP vapor cut valve with fuel tank.
PBIB1031E

EC-48
[VQ35DE]
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
Revision: 2005 July 2005 FX
SYMPTOM: CANNOT REFUEL/FUEL ODOR FROM THE FUEL FILLER OPENING IS STRONG
WHILE REFUELING.
1. CHECK EVAP CANISTER
1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.
2. Weigh the EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.
The weight should be less than 2.1 kg (4.6 lb).
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2. CHECK IF EVAP CANISTER SATURATED WITH WATER
Does water drain from the EVAP canister?
Ye s o r N o
Yes >> GO TO 3.
No >> GO TO 5.
3. REPLACE EVAP CANISTER
Replace EVAP canister with a new one.
>> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check the EVAP hose between EVAP canister and vehicle frame for clogging or poor connection.
>> Repair or replace EVAP hose.
5. CHECK VENT HOSES AND VENT TUBES
Check hoses and tubes between EVAP canister and refueling control valve for clogging, kink, looseness and
improper connection.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace hoses and tubes.
6. CHECK FILLER NECK TUBE
Check recirculation line for clogging, dents and cracks.
OK or NG
OK >> GO TO 7.
NG >> Replace filler neck tube.
PBIB1031E

ON BOARD REFUELING VAPOR RECOVERY (ORVR) EC-49
[VQ35DE]
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Revision: 2005 July 2005 FX
7. CHECK REFUELING EVAP VAPOR CUT VALVE
Refer to EC-49, "
Component Inspection" .
OK or NG
OK >> GO TO 8.
NG >> Replace refueling EVAP vapor cut valve with fuel tank.
8. CHECK FUEL FILLER TUBE
Check filler neck tube and hose connected to the fuel tank for clogging, dents and cracks.
OK or NG
OK >> GO TO 9.
NG >> Replace fuel filler tube.
9. CHECK ONE-WAY FUEL VALVE-I
Check one-way valve for clogging.
OK or NG
OK >> GO TO 10.
NG >> Repair or replace one-way fuel valve with fuel tank.
10. CHECK ONE-WAY FUEL VALVE-II
1. Make sure that fuel is drained from the tank.
2. Remove fuel filler tube and hose.
3. Check one-way fuel valve for operation as follows. When a stick is inserted, the valve should open, when removing
stick it should close.
Do not drop any material into the tank.
OK or NG
OK >> INSPECTION END
NG >> Replace fuel filler tube or replace one-way fuel valve with fuel tank.
Component InspectionABS006ZD
REFUELING EVAP VAPOR CUT VALVE
With CONSULT-II
1. Remove fuel tank. Refer to FL-10, "FUEL TANK" .
2. Drain fuel from the tank as follows:
a. Remove fuel feed hose located on the fuel gauge retainer.
b. Connect a spare fuel hose, one side to fuel gauge retainer where the hose was removed and the other side to a fuel container.
c. Drain fuel using “FUEL PUMP RELAY” in “ACTIVE TEST” mode with CONSULT-II.
3. Check refueling EVAP vapor cut valve for being stuck to close as follows. Blow air into the refueling EVAP vapor cut valve (from the end of EVAP/ORVR line hose), and check that
the air flows freely into the tank.
4. Check refueling EVAP vapor cut valve for being stuck to open as follows.
a. Connect vacuum pump to hose end.
b. Remove fuel gauge retainer with fuel gauge unit. Always replace O-ring with new one.
c. Put fuel tank upside down.
SEF665U

EC-50
[VQ35DE]
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
Revision: 2005 July 2005 FX
d. Apply vacuum pressure to hose end [−13.3 kPa ( −100 mmHg, −3.94 inHg)] with fuel gauge retainer
remaining open and check that the pressure is applicable.
Without CONSULT-II
1. Remove fuel tank. Refer to FL-10, "FUEL TANK" .
2. Drain fuel from the tank as follows:
a. Remove fuel gauge retainer.
b. Drain fuel from the tank using a handy pump into a fuel container.
3. Check refueling EVAP vapor cut valve for being stuck to close as follows. Blow air into the refueling EVAP vapor cut valve (from the end of EVAP/ORVR line hose), and check that
the air flows freely into the tank.
4. Check refueling EVAP vapor cut valve for being stuck to open as follows.
a. Connect vacuum pump to hose end.
b. Remove fuel gauge retainer with fuel gauge unit. Always replace O-ring with new one.
c. Put fuel tank upside down.
d. Apply vacuum pressure to hose end [ −13.3 kPa ( −100 mmHg, −3.94 inHg)] with fuel gauge retainer
remaining open and check that the pressure is applicable.
PBIB1035E
PBIB1035E

ON BOARD DIAGNOSTIC (OBD) SYSTEM EC-55
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EC
Revision: 2005 July 2005 FX
The fail-safe function also operates when above diagnoses except MIL circuit are detected and demands the
driver to repair the malfunction.
Emission-Related Diagnostic InformationABS006KK
EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS
× : Applicable —: Not applicable
Engine operating condition in fail-safe mode Engine speed will not rise more than 2,500 rpm due to the fuel cut
Items
(CONSULT-II screen terms) DTC*
1
SRT code
Test value/
Test limit
(GST only) Trip
Reference
page
CONSULT-II
GST*
2ECM*3
CAN COMM CIRCUIT U1000 1000*5—— 1 ×EC-171
CAN COMM CIRCUIT U1001
1001*5—— 2 — EC-171
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED. P0000 0000
———
Flashing*9—
INT/V TIM CONT-B1 P0011 0011 — — 2 ×EC-174
INT/V TIM CONT-B2 P0021 0021 — — 2 ×EC-174
HO2S2 HTR (B1) P0037 0037 ××2×EC-178
HO2S2 HTR (B1) P0038 0038 ××2×EC-178
HO2S2 HTR (B2) P0057 0057 ××2×EC-178
HO2S2 HTR (B2) P0058 0058 ××2×EC-178
MAF SEN/CIRCUIT P0101 0101 — — 2 ×EC-186
MAF SEN/CIRCUIT P0102 0102 — — 1 ×EC-195
MAF SEN/CIRCUIT P0103 0103 — — 1 ×EC-195
IAT SEN/CIRCUIT P0112 0112 — — 2 ×EC-203
IAT SEN/CIRCUIT P0113 0113 — — 2 ×EC-203
ECT SEN/CIRCUIT P0117 0117 — — 1 ×EC-208
ECT SEN/CIRCUIT P0118 0118 — — 1 ×EC-208
TP SEN 2/CIRC P0122 0122 — — 1 ×EC-213
TP SEN 2/CIRC P0123 0123 — — 1 ×EC-213
ECT SENSOR P0125 0125 — — 1 ×EC-220
IAT SENSOR P0127 0127 — — 2 ×EC-223
THERMSTAT FNCTN P0128 0128 — — 2 ×EC-226
HO2S2 (B1) P0138 0138 — ×2 ×EC-228
HO2S2 (B1) P0139 0139 ××2×EC-237
HO2S2 (B2) P0158 0158 — ×2 ×EC-228
HO2S2 (B2) P0159 0159 ××2×EC-237
FUEL SYS-LEAN-B1 P0171 0171 — — 2 ×EC-248
FUEL SYS-RICH-B1 P0172 0172 — — 2 ×EC-258
FUEL SYS-LEAN-B2 P0174 0174 — — 2 ×EC-248
FUEL SYS-RICH-B2 P0175 0175 — — 2 ×EC-258
FTT SENSOR P0181 0181 — — 2 ×EC-267
FTT SEN/CIRCUIT P0182 0182 — — 2 ×EC-273
FTT SEN/CIRCUIT P0183 0183 — — 2 ×EC-273
TP SEN 1/CIRC P0222 0222 — — 1 ×EC-278
TP SEN 1/CIRC P0223 0223 — — 1 ×EC-278
MULTI CYL MISFIRE P0300 0300 — — 2 ×EC-285

EC-56
[VQ35DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2005 July 2005 FX
CYL 1 MISFIRE P0301 0301 — — 2 ×EC-285
CYL 2 MISFIRE P0302 0302 — — 2 ×EC-285
CYL 3 MISFIRE P0303 0303 — — 2 ×EC-285
CYL 4 MISFIRE P0304 0304 — — 2 ×EC-285
CYL 5 MISFIRE P0305 0305 — — 2 ×EC-285
CYL 6 MISFIRE P0306 0306 — — 2 ×EC-285
KNOCK SEN/CIRC-B1 P0327 0327 — — 2 — EC-295
KNOCK SEN/CIRC-B1 P0328 0328 — — 2 —EC-295
CKP SEN/CIRCUIT P0335 0335 — — 2×EC-300
CMP SEN/CIRC-B1 P0340 0340 — — 2 ×EC-307
CMP SEN/CIRC-B2 P0345 0345 — — 2 ×EC-307
TW CATALYST SYS-B1 P0420 0420 ××2×EC-316
TW CATALYST SYS-B2 P0430 0430 ××2×EC-316
EVAP PURG FLOW/MON P0441 0441 ××2×EC-322
EVAP SMALL LEAK P0442 0442 ××2×EC-327
PURG VOLUME CONT/V P0444 0444 — — 2 ×EC-336
PURG VOLUME CONT/V P0445 0445 — — 2 ×EC-336
VENT CONTROL VALVE P0447 0447 — — 2 ×EC-343
EVAP SYS PRES SEN P0451 0451 — — 2 ×EC-350
EVAP SYS PRES SEN P0452 0452 — — 2 ×EC-353
EVAP SYS PRES SEN P0453 0453 — — 2 ×EC-359
EVAP GROSS LEAK P0455 0455 — — 2 ×EC-367
EVAP VERY SML LEAK P0456 0456
× *4× 2 ×EC-375
FUEL LEV SEN SLOSH P0460 0460 — — 2 ×EC-385
FUEL LEVEL SENSOR P0461 0461 — — 2 ×EC-387
FUEL LEVL SEN/CIRC P0462 0462 — — 2 ×EC-389
FUEL LEVEL SEN/CIRC P0463 0463 — — 2 ×EC-389
VEH SPEED SEN/CIRC*6P0500 0500 — — 2 ×EC-391
ISC SYSTEM P0506 0506 — — 2 ×EC-393
ISC SYSTEM P0507 0507 — — 2 ×EC-395
PW ST P SEN/CIRC P0550 0550 — — 2 — EC-397
ECM P0605 0605 — — 1 or 2× or — EC-402
TCM P0700 0700 — — 1 ×AT- 11 3
PNP SW/CIRC P0705 0705 — — 2 ×AT- 11 4
ATF TEMP SEN/CIRC P0710 0710 — — 2 ×AT-136
VEH SPD SEN/CIR AT*6P0720 0720 — — 2 ×AT- 11 8
ENGINE SPEED SIG P0725 0725 — — 2 ×AT-123
TCC SOLENOID/CIRC P0740 0740 — — 2 ×AT-125
A/T TCC S/V FNCTN P0744 0744 — — 2 ×AT-127
L/PRESS SOL/CIRC P0745 0745 — — 2 ×AT-129
A/F SEN1 HTR (B1) P1031 1031 ××2×EC-405
A/F SEN1 HTR (B1) P1032 1032 ××2×EC-405
Items
(CONSULT-II screen terms) DTC*
1
SRT code
Test value/
Test limit
(GST only) Trip
Reference
page
CONSULT-II
GST*
2ECM*3

ON BOARD DIAGNOSTIC (OBD) SYSTEM EC-59
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Revision: 2005 July 2005 FX
For malfunctions in which 1st trip DTCs are displayed, refer to EC-55, "EMISSION-RELATED DIAGNOSTIC
INFORMATION ITEMS" . These items are required by legal regulations to continuously monitor the system/
component. In addition, the items monitored non-continuously are also displayed on CONSULT-II.
1st trip DTC is specified in Service $07 of SAE J1979. 1st trip DTC detection occurs without lighting up the MIL
and therefore does not warn the driver of a malfunction. However, 1st trip DTC detection will not prevent the
vehicle from being tested, for example during Inspection/Maintenance (I/M) tests.
When a 1st trip DTC is detected, check, print out or write down and erase (1st trip) DTC and Freeze Frame
data as specified in Work Flow procedure Step II, refer to EC-102, "
WORK FLOW" . Then perform DTC Con-
firmation Procedure or Overall Function Check to try to duplicate the malfunction. If the malfunction is dupli-
cated, the item requires repair.
How to Read DTC and 1st Trip DTC
DTC and 1st trip DTC can be read by the following methods.
With CONSULT-II
With GST
CONSULT-II or GST (Generic Scan Tool) Examples: P0340, P1148, P1706, etc.
These DTCs are prescribed by SAE J2012.
(CONSULT-II also displays the malfunctioning component or system.)
No Tools
The number of blinks of the MIL in the Diagnostic Test Mode II (Self-Diagnostic Results) indicates the DTC.
Example: 0340, 1148, 1706, etc.
These DTCs are controlled by NISSAN.

1st trip DTC No. is the same as DTC No.

Output of a DTC indicates a malfunction. However, GST or the Diagnostic Test Mode II do not indi-
cate whether the malfunction is still occurring or has occurred in the past and has returned to nor-
mal. CONSULT-II can identify malfunction status as shown below. Therefore, using CONSULT-II (if
available) is recommended.
A sample of CONSULT-II display for DTC and 1st trip DTC is shown below. DTC or 1st trip DTC of a malfunc-
tion is displayed in SELF-DIAGNOSTIC RESULTS mode of CONSULT-II. Time data indicates how many times
the vehicle was driven after the last detection of a DTC.
If the DTC is being detected currently, the time data will be [0].
If a 1st trip DTC is stored in the ECM, the time data will be [1t].
FREEZE FRAME DATA AND 1ST TRIP FREEZE FRAME DATA
The ECM records the driving conditions such as fuel system status, calculated load value, engine coolant tem-
perature, short term fuel trim, long term fuel trim, engine speed, vehicle speed, base fuel schedule and intake
air temperature at the moment a malfunction is detected.
Data which are stored in the ECM memory, along with the 1st trip DTC, are called 1st trip freeze frame data.
The data, stored together with the DTC data, are called freeze frame data and displayed on CONSULT-II or
GST. The 1st trip freeze frame data can only be displayed on the CONSULT-II screen, not on the GST. For
details, see EC-136, "
Freeze Frame Data and 1st Trip Freeze Frame Data" .
Only one set of freeze frame data (either 1st trip freeze frame data or freeze frame data) can be stored in the
ECM. 1st trip freeze frame data is stored in the ECM memory along with the 1st trip DTC. There is no priority
for 1st trip freeze frame data and it is updated each time a different 1st trip DTC is detected. However, once
freeze frame data (2nd trip detection/MIL on) is stored in the ECM memory, 1st trip freeze frame data is no
longer stored. Remember, only one set of freeze frame data can be stored in the ECM. The ECM has the fol-
lowing priorities to update the data.
PBIB0911E

EC-60
[VQ35DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2005 July 2005 FX
For example, the EGR malfunction (Priority: 2) was detected and the freeze frame data was stored in the 2nd
trip. After that when the misfire (Priority: 1) is detected in another trip, the freeze frame data will be updated
from the EGR malfunction to the misfire. The 1st trip freeze frame data is updated each time a different mal-
function is detected. There is no priority for 1st trip freeze frame data. However, once freeze frame data is
stored in the ECM memory, 1st trip freeze data is no longer stored (because only one freeze frame data or 1st
trip freeze frame data can be stored in the ECM). If freeze frame data is stored in the ECM memory and freeze
frame data with the same priority occurs later, the first (original) freeze frame data remains unchanged in the
ECM memory.
Both 1st trip freeze frame data and freeze frame data (along with the DTCs) are cleared when the ECM mem-
ory is erased. Procedures for clearing the ECM memory are described in EC-68, "
HOW TO ERASE EMIS-
SION-RELATED DIAGNOSTIC INFORMATION" .
SYSTEM READINESS TEST (SRT) CODE
System Readiness Test (SRT) code is specified in Service $01 of SAE J1979.
As part of an enhanced emissions test for Inspection & Maintenance (I/M), certain states require the status of
SRT be used to indicate whether the ECM has completed self-diagnosis of major emission systems and com-
ponents. Completion must be verified in order for the emissions inspection to proceed.
If a vehicle is rejected for a State emissions inspection due to one or more SRT items indicating “INCMP”, use
the information in this Service Manual to set the SRT to “CMPLT”.
In most cases the ECM will automatically complete its self-diagnosis cycle during normal usage, and the SRT
status will indicate “CMPLT” for each application system. Once set as “CMPLT”, the SRT status remains
“CMPLT” until the self-diagnosis memory is erased.
Occasionally, certain portions of the self-diagnostic test may not be completed as a result of the customer's
normal driving pattern; the SRT will indicate “INCMP” for these items.
NOTE:
The SRT will also indicate “INCMP” if the self-diagnosis memory is erased for any reason or if the ECM mem-
ory power supply is interrupted for several hours.
If, during the state emissions inspection, the SRT indicates “CMPLT” for all test items, the inspector will con-
tinue with the emissions test. However, if the SRT indicates “INCMP” for one or more of the SRT items the
vehicle is returned to the customer untested.
NOTE:
If MIL is ON during the state emissions inspection, the vehicle is also returned to the customer untested even
though the SRT indicates “CMPLT” for all test items. Therefore, it is important to check SRT (“CMPLT”) and
DTC (No DTCs) before the inspection.
Priority Items
1 Freeze frame data Misfire — DTC: P0300 - P0306
Fuel Injection System Function — DTC: P0171, P0172, P0174, P0175
2 Except the above items (Includes A/T related items)
3 1st trip freeze frame data