2004 INFINITI FX35 fuel

BASIC SERVICE PROCEDURE
EC-697
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Revision: 2004 November 2004 FX35/FX45
31. REPLACE HEATED OXYGEN SENSOR 1
1. Stop engine.
2. Replace heated oxygen sensor 1 on the malfunctioning bank.
With CONSULT-II>>GO TO 32.
Without CONSULT-II>>GO TO 33.
32. CHECK HEATED OXYGEN SENSOR 1 (BANK 1)/(BANK 2) SIGNAL
With CONSULT-II
1. Start engine and warm it up until engine coolant temperature indicator points the middle of gauge.
2. See “HO2S1 MNTR (B1)/(B2)” in “DATA MONITOR” mode.
3. Running engine at 2,000 rpm under no load (The engine is
warmed up to normal operating temperature.), check that the
monitor fluctuates between LEAN and RICH more than 5 times
during 10 seconds.
OK or NG
OK >> GO TO 4.
NG >> GO TO 34.
33. CHECK HEATED OXYGEN SENSOR 1 (BANK 1)/(BANK 2) SIGNAL
Without CONSULT-II
1. Set ECM to Self-diagnostic mode II (Heated oxygen sensor 1 monitor). Refer to EC-719, "
HOW TO
SWITCH DIAGNOSTIC TEST MODE" .
2. Switch the monitored sensor to the malfunctioning bank. Refer to EC-719, "
How to Switch Monitored Sen-
sor From Bank 1 to Bank 2 or Vice Versa" .
3. Running engine at 2,000 rpm under no load (The engine is warmed up to normal operating temperature.),
check that the MIL comes on more than 5 times during 10 seconds.
OK or NG
OK >> GO TO 4.
NG >> GO TO 34.
34. DETECT MALFUNCTIONING PART
Check the following.

Check fuel pressure regulator and repair or replace if necessary. Refer to EC-700, "Fuel Pressure Check"
.

Check mass air flow sensor and its circuit, and repair or replace if necessary. Refer to EC-822 , EC-830 ,
EC-1064
.

Check injector and its circuit, and repair or replace if necessary. Refer to EC-1274 .

Check engine coolant temperature sensor and its circuit, and repair or replace if necessary. Refer to EC-
842 and EC-855 .
OK or NG
OK >> GO TO 36.
NG >> 1. Repair or replace.
2. GO TO 35. 1 time: RICH → LEAN → RICH
2 times: RICH → LEAN → RICH → LEAN → RICH
PBIB0120E

EC-700
[VK45DE]
BASIC SERVICE PROCEDURE
Revision: 2004 November 2004 FX35/FX45
2. Perform EC-698, "Throttle Valve Closed Position Learning" .
3. Start engine and warm it up to normal operating temperature.
4. Check that all items listed under the topic PREPARATION (previously mentioned) are in good order.
5. Turn ignition switch OFF and wait at least 10 seconds.
6. Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.
7. Repeat the following procedure quickly five times within 5 seconds.
a. Fully depress the accelerator pedal.
b. Fully release the accelerator pedal.
8. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the MIL stops
blinking and turned ON.
9. Fully release the accelerator pedal within 3 seconds after the MIL turned ON.
10. Start engine and let it idle.
11. Wait 20 seconds.
12. Rev up the engine two or three times and make sure that idle speed and ignition timing are within the
specifications.
13. If idle speed and ignition timing are not within the specification, Idle Air Volume Learning will not be carried
out successfully. In this case, find the cause of the incident by referring to the “DIAGNOSTIC PROCE-
DURE” below.
DIAGNOSTIC PROCEDURE
If idle air volume learning cannot be performed successfully, proceed as follows:
1.Check that throttle valve is fully closed.
2.Check PCV valve operation.
3.Check that downstream of throttle valve is free from air leakage.
4.When the above three items check out OK, engine component parts and their installation condi-
tion are questionable. Check and eliminate the cause of the incident.
It is useful to perform EC-780, "
TROUBLE DIAGNOSIS - SPECIFICATION VALUE" .
5.If any of the following conditions occur after the engine has started, eliminate the cause of the
incident and perform Idle Air Volume Learning all over again:

Engine stalls.

Erroneous idle.
Fuel Pressure CheckABS00BZH
FUEL PRESSURE RELEASE
With CONSULT-II
1. Turn ignition switch ON.
ITEM SPECIFICATION
Idle speed 650 ± 50 rpm (in P or N position)
Ignition timing 12 ± 5° BTDC (in P or N position)
SEC897C

BASIC SERVICE PROCEDURE
EC-701
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Revision: 2004 November 2004 FX35/FX45
2. Perform “FUEL PRESSURE RELEASE” in “WORK SUPPORT”
mode with CONSULT-II.
3. Start engine.
4. After engine stalls, crank it two or three times to release all fuel
pressure.
5. Turn ignition switch OFF.
Without CONSULT-II
1. Remove fuel pump fuse located in IPDM E/R.
2. Start engine.
3. After engine stalls, crank it 2 or 3 times to release all fuel pres-
sure.
4. Turn ignition switch OFF.
5. Reinstall fuel pump fuse after servicing fuel system.
FUEL PRESSURE CHECK
Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger.
NOTE:

Prepare pans or saucers under the disconnected fuel line because the fuel may spill out. The fuel
pressure cannot be completely released because S50 models do not have fuel return system.

Use Fuel Pressure Gauge Kit (J-44321) to check fuel pressure.
1. Release fuel pressure to zero. Refer to EC-700, "
FUEL PRESSURE RELEASE" .
2. Install the inline fuel quick disconnected fitting between fuel
damper and injector tube.
3. Connect the fuel pressure test gauge (quick connector adapter
hose) to the inline fuel quick disconnected fitting.
4. Turn ignition switch ON and check for fuel leakage.
5. Start engine and check for fuel leakage.
6. Read the indication of fuel pressure gauge.
7. If result is unsatisfactory, go to next step.
8. Check the following.

Fuel hoses and fuel tubes for clogging

Fuel filter for clogging

Fuel pump

Fuel pressure regulator for clogging
SEF214Y
PBIB1482E
PBIB1489E
At idling:
Approximately 350 kPa (3.57 kg/cm2 , 51 psi)
PBIB1490E

EC-702
[VK45DE]
BASIC SERVICE PROCEDURE
Revision: 2004 November 2004 FX35/FX45
If OK, replace fuel level sensor unit, fuel filter and fuel pump assembly.
If NG, repair or replace.

EC-704
[VK45DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2004 November 2004 FX35/FX45
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 InformationABS00BZK
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 codeTest value/
Te s t l i m i t
(GST only)1st trip DTCReference
page CONSULT-II
GST*
2ECM*3
CAN COMM CIRCUIT U1000
1000*4———EC-792
CAN COMM CIRCUIT U1001
1001*4——×EC-792
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.P0000 0000————
INT/V TIM CONT-B1 P0011 0011 — —×EC-795
INT/V TIM CONT-B2 P0021 0021 — —×EC-795
HO2S1 HTR (B1) P0031 0031×××EC-806
HO2S1 HTR (B1) P0032 0032×××EC-806
HO2S2 HTR (B1) P0037 0037×××EC-814
HO2S2 HTR (B1) P0038 0038×××EC-814
HO2S1 HTR (B2) P0051 0051×××EC-806
HO2S1 HTR (B2) P0052 0052×××EC-806
HO2S2 HTR (B2) P0057 0057×××EC-814
HO2S2 HTR (B2) P0058 0058×××EC-814
MAF SEN/CIRCUIT P0101 0101 — — —EC-822
MAF SEN/CIRCUIT P0102 0102 — — —EC-830
MAF SEN/CIRCUIT P0103 0103 — — —EC-830
IAT SEN/CIRCUIT P0112 0112 — —×EC-837
IAT SEN/CIRCUIT P0113 0113 — —×EC-837
ECT SEN/CIRCUIT P0117 0117 — — —EC-842
ECT SEN/CIRCUIT P0118 0118 — — —EC-842
TP SEN 2/CIRC P0122 0122 — — —EC-848
TP SEN 2/CIRC P0123 0123 — — —EC-848
ECT SENSOR P0125 0125 — — —EC-855
IAT SENSOR P0127 0127 — —×EC-858
THERMSTAT FNCTN P0128 0128 — —×EC-861
HO2S1 (B1) P0132 0132 —××EC-863
HO2S1 (B1) P0133 0133×××EC-872
HO2S1 (B1) P0134 0134 —××EC-884
HO2S2 (B1) P0138 0138 —××EC-894
HO2S2 (B1) P0139 0139×××EC-903
HO2S1 (B2) P0152 0152 —××EC-863
HO2S1 (B2) P0153 0153×××EC-872
HO2S1 (B2) P0154 0154 —××EC-884
HO2S2 (B2) P0158 0158 —××EC-894
HO2S2 (B2) P0159 0159×××EC-903

ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-705
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Revision: 2004 November 2004 FX35/FX45FUEL SYS-LEAN-B1 P0171 0171 — —×EC-914
FUEL SYS-RICH-B1 P0172 0172 — —×EC-923
FUEL SYS-LEAN-B2 P0174 0174 — —×EC-914
FUEL SYS-RICH-B2 P0175 0175 — —×EC-923
FTT SENSOR P0181 0181 — —×EC-931
FTT SEN/CIRCUIT P0182 0182 — —×EC-937
FTT SEN/CIRCUIT P0183 0183 — —×EC-937
TP SEN 1/CIRC P0222 0222 — — —EC-942
TP SEN 1/CIRC P0223 0223 — — —EC-942
MULTI CYL MISFIRE P0300 0300 — —×EC-949
CYL 1 MISFIRE P0301 0301 — —×EC-949
CYL 2 MISFIRE P0302 0302 — —×EC-949
CYL 3 MISFIRE P0303 0303 — —×EC-949
CYL 4 MISFIRE P0304 0304 — —×EC-949
CYL 5 MISFIRE P0305 0305 — —×EC-949
CYL 6 MISFIRE P0306 0306 — —×EC-949
CYL 7 MISFIRE P0307 0307 — —×EC-949
CYL 8 MISFIRE P0308 0308 — —×EC-949
KNOCK SEN/CIRC-B1 P0327 0327 — —×EC-955
KNOCK SEN/CIRC-B1 P0328 0328 — —×EC-955
KNOCK SEN/CIRC-B2 P0332 0332 — —×EC-955
KNOCK SEN/CIRC-B2 P0333 0333 — —×EC-955
CKP SEN/CIRCUIT P0335 0335 — —×EC-960
CMP SEN/CIRC-B1 P0340 0340 — —×EC-966
TW CATALYST SYS-B1 P0420 0420×××EC-971
TW CATALYST SYS-B2 P0430 0430×××EC-971
EVAP PURG FLOW/MON P0441 0441×××EC-976
EVAP SMALL LEAK P0442 0442×××EC-981
PURG VOLUME CONT/V P0444 0444 — —×EC-990
PURG VOLUME CONT/V P0445 0445 — —×EC-990
VENT CONTROL VALVE P0447 0447 — —×EC-997
EVAP SYS PRES SEN P0451 0451 — —×EC-1004
EVAP SYS PRES SEN P0452 0452 — —×EC-1007
EVAP SYS PRES SEN P0453 0453 — —×EC-1014
EVAP GROSS LEAK P0455 0455 —××EC-1022
EVAP VERY SML LEAK P0456 0456
×*5××EC-1030
FUEL LEV SEN SLOSH P0460 0460 — —×EC-1040
FUEL LEVEL SENSOR P0461 0461 — —×EC-1042
FUEL LEVL SEN/CIRC P0462 0462 — —×EC-1044
FUEL LEVL SEN/CIRC P0463 0463 — —×EC-1044
VEH SPEED SEN/CIRC*6P0500 0500 — —×EC-1046
ISC SYSTEM P0506 0506 — —×EC-1048
Items
(CONSULT-II screen terms)DTC*
1
SRT codeTest value/
Test limit
(GST only)1st trip DTCReference
page CONSULT-II
GST*
2ECM*3

EC-708
[VK45DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2004 November 2004 FX35/FX45
For malfunctions in which 1st trip DTCs are displayed, refer to EC-704, "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 Mode 7 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 vehi-
cle 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-727, "
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-764, "
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

ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-709
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Revision: 2004 November 2004 FX35/FX45
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-715, "
HOW TO ERASE EMIS-
SION-RELATED DIAGNOSTIC INFORMATION" .
SYSTEM READINESS TEST (SRT) CODE
System Readiness Test (SRT) code is specified in Mode 1 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.
SRT Item
The table below shows required self-diagnostic items to set the SRT to “CMPLT”.
Priority Items
1Freeze frame data Misfire — DTC: P0300 - P0308
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
SRT item
(CONSULT-II indica-
tion)Perfor-
mance
Priority*Required self-diagnostic items to set the SRT to “CMPLT”Corresponding DTC
No.
CATALYST 2 Three way catalyst function P0420, P0430
EVAP SYSTEM 1 EVAP control system P0442
2 EVAP control system P0456
2 EVAP control system purge flow monitoring P0441
HO2S 2 Heated oxygen sensor 1 P0133, P0153
Heated oxygen sensor 1 P1143, P1163
Heated oxygen sensor 1 P1144, P1164
Heated oxygen sensor 2 P0139, P0159
Heated oxygen sensor 2 P1146, P1166
Heated oxygen sensor 2 P1147, P1167