2006 INFINITI M35 fuel system

EC-756
[VK45DE]
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
Revision: 2006 January2006 M35/M45
ON BOARD REFUELING VAPOR RECOVERY (ORVR)PFP:00032
System DescriptionNBS0059V
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.
WAR NING :
When conducting inspections below, be sure to observe the following:
Put a “CAUTION: FLAMMABLE” 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 EC-809, "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-757
[VK45DE]
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Revision: 2006 January2006 M35/M45
Diagnostic ProcedureNBS0059W
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 2.0 kg (4.4 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 (1)?
EVAP canister vent control valve (2)
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-759, "
Component Inspection" .
OK or NG
OK >>INSPECTION END
NG >> Replace refueling EVAP vapor cut valve with fuel tank.
PBIB2731E

EC-758
[VK45DE]
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
Revision: 2006 January2006 M35/M45
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 2.0 kg (4.4 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 (1)?
EVAP canister vent control valve (2)
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.
PBIB2731E

ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-765
[VK45DE]
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Revision: 2006 January2006 M35/M45
Therefore, when electrical controlled throttle and part of ECM related diagnoses are continuously detected as
NG for 5 trips, ECM warns the driver that engine control system malfunctions and MIL circuit is open by means
of operating fail-safe function.
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 InformationNBS005A3
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/
Test limit
(GST only)Trip MILReference
page CONSULT-II
GST*
2ECM*3
CAN COMM CIRCUIT U1000
1000*4—— 1EC-886
CAN COMM CIRCUIT U1001
1001*4—— 2 —EC-886
CONTROL UNIT(CAN) U1010 1010 — — 1EC-889
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.P0000 0000———
Flashing*8—
INT/V TIM CONT-B1 P0011 0011 — — 2
EC-891
INT/V TIM CONT-B2 P0021 0021 — — 2EC-891
A/F SEN1 HTR (B1) P0031 0031 —2EC-904
A/F SEN1 HTR (B1) P0032 0032 —2EC-904
HO2S2 HTR (B1) P0037 0037 —2EC-911
HO2S2 HTR (B1) P0038 0038 —2EC-911
A/F SEN1 HTR (B2) P0051 0051 —2EC-904
A/F SEN1 HTR (B2) P0052 0052 —2EC-904
HO2S2 HTR (B2) P0057 0057 —2EC-911
HO2S2 HTR (B2) P0058 0058 —2EC-911
INT/V TIM V/CIR-B1 P0075 0075 — — 2EC-920
INT/V TIM V/CIR-B2 P0081 0081 — — 2EC-920
MAF SEN/CIRCUIT P0101 0101 — — 2EC-927
MAF SEN/CIRCUIT P0102 0102 — — 1EC-936
MAF SEN/CIRCUIT P0103 0103 — — 1EC-936
IAT SEN/CIRCUIT P0112 0112 — — 2EC-943
IAT SEN/CIRCUIT P0113 0113 — — 2EC-943
ECT SEN/CIRC P0117 0117 — — 1EC-948
ECT SEN/CIRC P0118 0118 — — 1EC-948
TP SEN 2/CIRC P0122 0122 — — 1EC-954
TP SEN 2/CIRC P0123 0123 — — 1EC-954
ECT SENSOR P0125 0125 — — 1EC-961
IAT SENSOR P0127 0127 — — 2EC-964
THERMSTAT FNCTN P0128 0128 — — 2EC-967
A/F SENSOR1 (B1) P0130 0130 —2EC-969
A/F SENSOR1 (B1) P0131 0131 —2EC-979
A/F SENSOR1 (B1) P0132 0132 —2EC-988
A/F SENSOR1 (B1) P0133 01332EC-997
HO2S2 (B1) P0137 01372EC-1009

EC-766
[VK45DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2006 January2006 M35/M45
HO2S2 (B1) P0138 01382EC-1020
HO2S2 (B1) P0139 01392EC-1033
A/F SENSOR1 (B2) P0150 0150 —2EC-969
A/F SENSOR1 (B2) P0151 0151 —2EC-979
A/F SENSOR1 (B2) P0152 0152 —2EC-988
A/F SENSOR1 (B2) P0153 01532EC-997
HO2S2 (B2) P0157 01572EC-1009
HO2S2 (B2) P0158 01582EC-1020
HO2S2 (B2) P0159 01592EC-1033
FUEL SYS-LEAN-B1 P0171 0171 — — 2EC-1044
FUEL SYS-RICH-B1 P0172 0172 — — 2EC-1055
FUEL SYS-LEAN-B2 P0174 0174 — — 2EC-1044
FUEL SYS-RICH-B2 P0175 0175 — — 2EC-1055
FTT SENSOR P0181 0181 — — 2EC-1066
FTT SEN/CIRCUIT P0182 0182 — — 2EC-1072
FTT SEN/CIRCUIT P0183 0183 — — 2EC-1072
TP SEN 1/CIRC P0222 0222 — — 1EC-1077
TP SEN 1/CIRC P0223 0223 — — 1EC-1077
MULTI CYL MISFIRE P0300 0300 — — 2EC-1084
CYL 1 MISFIRE P0301 0301 — — 2EC-1084
CYL 2 MISFIRE P0302 0302 — — 2EC-1084
CYL 3 MISFIRE P0303 0303 — — 2EC-1084
CYL 4 MISFIRE P0304 0304 — — 2EC-1084
CYL 5 MISFIRE P0305 0305 — — 2EC-1084
CYL 6 MISFIRE P0306 0306 — — 2EC-1084
CYL 7 MISFIRE P0307 0307 — — 2EC-1084
CYL 8 MISFIRE P0308 0308 — — 2EC-1084
KNOCK SEN/CIRC-B1 P0327 0327 — — 2 —EC-1094
KNOCK SEN/CIRC-B1 P0328 0328 — — 2 —EC-1094
KNOCK SEN/CIRC-B2 P0332 0332 — — 2 —EC-1094
KNOCK SEN/CIRC-B2 P0333 0333 — — 2 —EC-1094
CKP SEN/CIRCUIT P0335 0335 — — 2EC-1099
CMP SEN/CIRC-B1 P0340 0340 — — 2EC-1106
TW CATALYST SYS-B1 P0420 04202EC-1113
TW CATALYST SYS-B2 P0430 04302EC-1113
EVAP PURG FLOW/MON P0441 04412EC-1119
EVAP SMALL LEAK P0442 04422EC-1124
PURG VOLUME CONT/V P0443 0443 — — 2EC-1132
PURG VOLUME CONT/V P0444 0444 — — 2EC-1140
PURG VOLUME CONT/V P0445 0445 — — 2EC-1140
VENT CONTROL VALVE P0447 0447 — — 2EC-1147
VENT CONTROL VALVE P0448 0448 — — 2EC-1154
Items
(CONSULT-II screen terms)DTC*
1
SRT codeTest value/
Te s t l i m i t
(GST only)Trip MILReference
page CONSULT-II
GST*
2ECM*3

ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-767
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Revision: 2006 January2006 M35/M45EVAP SYS PRES SEN P0451 0451 — — 2EC-1160
EVAP SYS PRES SEN P0452 0452 — — 2EC-1163
EVAP SYS PRES SEN P0453 0453 — — 2EC-1170
EVAP GROSS LEAK P0455 0455 — — 2EC-1178
EVAP VERY SML LEAK P0456 0456*72EC-1185
FUEL LEV SEN SLOSH P0460 0460 — — 2EC-1194
FUEL LEVEL SENSOR P0461 0461 — — 2EC-1196
FUEL LEVL SEN/CIRC P0462 0462 — — 2EC-1198
FUEL LEVL SEN/CIRC P0463 0463 — — 2EC-1198
VEH SPEED SEN/CIRC*5P0500 0500 — — 2EC-1200
ISC SYSTEM P0506 0506 — — 2EC-1202
ISC SYSTEM P0507 0507 — — 2EC-1204
PW ST P SEN/CIRC P0550 0550 — — 2 —EC-1206
ECM BACK UP/CIRCUIT P0603 0603 — — 2EC-1211
ECM P0605 0605 — — 1 or 2 or —EC-1215
SENSOR POWER/CIRC P0643 0643 — — 1EC-1218
TCM P0700 0700 — — 1AT- 11 2
PNP SW/CIRC P0705 0705 — — 2AT- 11 3
ATF TEMP SEN/CIRC P0710 0710 — — 2AT-135
TURBINE SENSOR P0717 0717 — — 2AT- 11 7
VEH SPD SEN/CIR AT*5P0720 0720 — — 2AT- 11 9
TCC SOLENOID/CIRC P0740 0740 — — 2AT-126
A/T TCC S/V FNCTN P0744 0744 — — 2AT-128
L/PRESS SOL/CIRC P0745 0745 — — 2AT-130
P-N POS SW/CIRCUIT P0850 0850 — — 2EC-1223
INTK TIM S/CIRC-B1 P1140 1140 — — 2EC-1228
INTK TIM S/CIRC-B2 P1145 1145 — — 2EC-1228
CLOSED LOOP-B1 P1148 1148 — — 1EC-1236
CLOSED LOOP-B2 P1168 1168 — — 1EC-1236
TCS C/U FUNCTN P1211 1211 — — 2 —EC-1237
TCS/CIRC P1212 1212 — — 2 —EC-1238
ENG OVER TEMP P1217 1217 — — 1EC-1239
FPCM/CIRCUIT P1220 1220 — — 2EC-1251
CTP LEARNING P1225 1225 — — 2 —EC-1259
CTP LEARNING P1226 1226 — — 2 —EC-1261
BAT CURRENT SENSOR P1550 1550 — — 2 —EC-1263
BAT CURRENT SENSOR P1551 1551 — — 2 —EC-1269
BAT CURRENT SENSOR P1552 1552 — — 2 —EC-1269
BAT CURRENT SENSOR P1553 1553 — — 2 —EC-1275
BAT CURRENT SENSOR P1554 1554 — — 2 —EC-1281
Items
(CONSULT-II screen terms)DTC*
1
SRT codeTest value/
Test limit
(GST only)Trip MILReference
page CONSULT-II
GST*
2ECM*3

EC-770
[VK45DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2006 January2006 M35/M45
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, absolute throttle position, 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-850, "
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.
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-778, "
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.
PBIB0911E
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

ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-771
[VK45DE]
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Revision: 2006 January2006 M35/M45
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”.
*: If completion of several SRTs is required, perform driving patterns (DTC confirmation procedure), one by one based on the priority for
models with CONSULT-II.
SRT Set Timing
SRT is set as “CMPLT” after self-diagnosis has been performed one or more times. Completion of SRT is
done regardless of whether the result is OK or NG. The set timing is different between OK and NG results and
is shown in the table below.
OK: Self-diagnosis is carried out and the result is OK.
NG: Self-diagnosis is carried out and the result is NG.
—: Self-diagnosis is not carried out.
When all SRT related self-diagnoses showed OK results in a single cycle (Ignition OFF-ON-OFF), the SRT will
indicate “CMPLT”.
Case 1 above
SRT item
(CONSULT-II indication)Performance
Priority*Required self-diagnostic items to set the SRT to “CMPLT”Corresponding
DTC No.
CATALYST 2 Three way catalyst function P0420, P0430
EVAP SYSTEM 2 EVAP control system purge flow monitoring P0441
1 EVAP control system P0442
2 EVAP control system P0456
HO2S 2 Air fuel ratio (A/F) sensor 1 P0133, P0153
Heated oxygen sensor 2 P0137, P0157
Heated oxygen sensor 2 P0138, P0158
Heated oxygen sensor 2 P0139, P0159
Self-diagnosis resultExample
DiagnosisIgnition cycle
ON OFF ON OFF ON OFF ON
All OK Case 1 P0400 OK (1) — (1) OK (2) — (2)
P0402 OK (1) — (1) — (1) OK (2)
P1402 OK (1) OK (2) — (2) — (2)
SRT of EGR “CMPLT” “CMPLT” “CMPLT” “CMPLT”
Case 2 P0400 OK (1) — (1) — (1) — (1)
P0402 — (0) — (0) OK (1) — (1)
P1402 OK (1) OK (2) — (2) — (2)
SRT of EGR “INCMP” “INCMP” “CMPLT” “CMPLT”
NG exists Case 3 P0400 OK OK — —
P0402 — — — —
P1402 NG — NGNG
(Consecutive
NG)
(1st trip)
DTC1st trip DTC — 1st trip DTCDTC
(= MIL ON)
SRT of EGR “INCMP” “INCMP” “INCMP” “CMPLT”