2007 INFINITI M35 fuel system

EC-10Revision: 2007 April2007 M35/M45 DTC P0127 IAT SENSOR .......................................942
Component Description ........................................942
On Board Diagnosis Logic ....................................942
DTC Confirmation Procedure ...............................942
Diagnostic Procedure ...........................................943
Component Inspection ..........................................944
Removal and Installation ......................................944
DTC P0128 THERMOSTAT FUNCTION .................945
On Board Diagnosis Logic ....................................945
DTC Confirmation Procedure ...............................945
Diagnostic Procedure ...........................................945
Component Inspection ..........................................946
Removal and Installation ......................................946
DTC P0130, P0150 A/F SENSOR 1 ........................947
Component Description ........................................947
CONSULT-II Reference Value in Data Monitor Mode
.947
On Board Diagnosis Logic ....................................947
DTC Confirmation Procedure ...............................947
Overall Function Check ........................................949
Wiring Diagram .....................................................950
Diagnostic Procedure ...........................................953
Removal and Installation ......................................956
DTC P0131, P0151 A/F SENSOR 1 ........................957
Component Description ........................................957
CONSULT-II Reference Value in Data Monitor Mode
.957
On Board Diagnosis Logic ....................................957
DTC Confirmation Procedure ...............................957
Wiring Diagram .....................................................959
Diagnostic Procedure ...........................................962
Removal and Installation ......................................965
DTC P0132, P0152 A/F SENSOR 1 ........................966
Component Description ........................................966
CONSULT-II Reference Value in Data Monitor Mode
.966
On Board Diagnosis Logic ....................................966
DTC Confirmation Procedure ...............................966
Wiring Diagram .....................................................968
Diagnostic Procedure ...........................................971
Removal and Installation ......................................974
DTC P0133, P0153 A/F SENSOR 1 ........................975
Component Description ........................................975
CONSULT-II Reference Value in Data Monitor Mode
.975
On Board Diagnosis Logic ....................................975
DTC Confirmation Procedure ...............................976
Wiring Diagram .....................................................978
Diagnostic Procedure ...........................................981
Removal and Installation ......................................986
DTC P0137, P0157 HO2S2 .....................................987
Component Description ........................................987
CONSULT-II Reference Value in Data Monitor Mode
.987
On Board Diagnosis Logic ....................................987
DTC Confirmation Procedure ...............................988
Overall Function Check ........................................988
Wiring Diagram .....................................................990
Diagnostic Procedure ...........................................993Component Inspection ..........................................996
Removal and Installation .......................................997
DTC P0138, P0158 HO2S2 .....................................998
Component Description ........................................998
CONSULT-II Reference Value in Data Monitor Mode
.998
On Board Diagnosis Logic ....................................998
DTC Confirmation Procedure ................................999
Overall Function Check ........................................1000
Wiring Diagram ....................................................1001
Diagnostic Procedure ...........................................1004
Component Inspection .........................................1009
Removal and Installation ......................................1010
DTC P0139, P0159 HO2S2 ....................................1011
Component Description .......................................1011
CONSULT-II Reference Value in Data Monitor Mode
1011
On Board Diagnosis Logic ...................................1011
DTC Confirmation Procedure ...............................1012
Overall Function Check ........................................1012
Wiring Diagram ....................................................1014
Diagnostic Procedure ...........................................1017
Component Inspection .........................................1020
Removal and Installation ......................................1021
DTC P0171, P0174 FUEL INJECTION SYSTEM
FUNCTION .............................................................1022
On Board Diagnosis Logic ...................................1022
DTC Confirmation Procedure ...............................1022
Wiring Diagram ....................................................1024
Diagnostic Procedure ...........................................1028
DTC P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION .............................................................1033
On Board Diagnosis Logic ...................................1033
DTC Confirmation Procedure ...............................1033
Wiring Diagram ....................................................1035
Diagnostic Procedure ...........................................1039
DTC P0181 FTT SENSOR .....................................1043
Component Description .......................................1043
On Board Diagnosis Logic ...................................1043
DTC Confirmation Procedure ...............................1043
Wiring Diagram ....................................................1045
Diagnostic Procedure ...........................................1046
Component Inspection .........................................1048
Removal and Installation ......................................1048
DTC P0182, P0183 FTT SENSOR .........................1049
Component Description .......................................1049
On Board Diagnosis Logic ...................................1049
DTC Confirmation Procedure ...............................1049
Wiring Diagram ....................................................1050
Diagnostic Procedure ...........................................1051
Component Inspection .........................................1053
Removal and Installation ......................................1053
DTC P0222, P0223 TP SENSOR ...........................1054
Component Description .......................................1054
CONSULT-II Reference Value in Data Monitor Mode
1054
On Board Diagnosis Logic ...................................1054
DTC Confirmation Procedure ...............................1055
Wiring Diagram ....................................................1056

EC-12Revision: 2007 April2007 M35/M45 DTC Confirmation Procedure ..............................11 4 6
Wiring Diagram ....................................................11 4 7
Diagnostic Procedure ..........................................11 4 8
Component Inspection .........................................11 5 2
DTC P0455 EVAP CONTROL SYSTEM ................115 3
On Board Diagnosis Logic ...................................11 5 3
DTC Confirmation Procedure ..............................11 5 4
Diagnostic Procedure ..........................................11 5 5
DTC P0456 EVAP CONTROL SYSTEM ................116 0
On Board Diagnosis Logic ...................................11 6 0
DTC Confirmation Procedure ..............................11 6 1
Overall Function Check .......................................11 6 2
Diagnostic Procedure ..........................................11 6 3
DTC P0460 FUEL LEVEL SENSOR ......................116 9
Component Description .......................................11 6 9
On Board Diagnosis Logic ...................................11 6 9
DTC Confirmation Procedure ..............................11 6 9
Diagnostic Procedure ..........................................11 7 0
Removal and Installation .....................................11 7 0
DTC P0461 FUEL LEVEL SENSOR ......................117 1
Component Description .......................................11 7 1
On Board Diagnosis Logic ...................................11 7 1
Overall Function Check .......................................11 7 1
Diagnostic Procedure ..........................................11 7 2
Removal and Installation .....................................11 7 2
DTC P0462, P0463 FUEL LEVEL SENSOR CIR-
CUIT .......................................................................117 3
Component Description .......................................11 7 3
On Board Diagnosis Logic ...................................11 7 3
DTC Confirmation Procedure ..............................11 7 3
Diagnostic Procedure ..........................................11 7 4
Removal and Installation .....................................11 7 4
DTC P0500 VSS .....................................................117 5
Description ...........................................................11 7 5
On Board Diagnosis Logic ...................................11 7 5
DTC Confirmation Procedure ..............................11 7 5
Overall Function Check .......................................11 7 6
Diagnostic Procedure ..........................................11 7 6
DTC P0506 ISC SYSTEM ......................................117 7
Description ...........................................................11 7 7
On Board Diagnosis Logic ...................................11 7 7
DTC Confirmation Procedure ..............................11 7 7
Diagnostic Procedure ..........................................11 7 8
DTC P0507 ISC SYSTEM ......................................117 9
Description ...........................................................11 7 9
On Board Diagnosis Logic ...................................11 7 9
DTC Confirmation Procedure ..............................11 7 9
Diagnostic Procedure ..........................................11 8 0
DTC P0550 PSP SENSOR .....................................118 1
Component Description .......................................11 8 1
CONSULT-II Reference Value in Data Monitor Mode
11 8 1
On Board Diagnosis Logic ...................................11 8 1
DTC Confirmation Procedure ..............................11 8 1
Wiring Diagram ....................................................11 8 2
Diagnostic Procedure ..........................................11 8 3
Component Inspection .........................................11 8 5
Removal and Installation .....................................11 8 5DTC P0603 ECM POWER SUPPLY .......................11 86
Component Description .......................................11 8 6
On Board Diagnosis Logic ...................................11 8 6
DTC Confirmation Procedure ...............................11 8 6
Wiring Diagram ....................................................11 8 7
Diagnostic Procedure ...........................................11 8 8
DTC P0605 ECM ....................................................11 90
Component Description .......................................11 9 0
On Board Diagnosis Logic ...................................11 9 0
DTC Confirmation Procedure ...............................11 9 0
Diagnostic Procedure ...........................................11 9 1
DTC P0643 SENSOR POWER SUPPLY ...............11 93
On Board Diagnosis Logic ...................................11 9 3
DTC Confirmation Procedure ...............................11 9 3
Wiring Diagram ....................................................11 9 4
Diagnostic Procedure ...........................................11 9 6
DTC P0850 PNP SWITCH ......................................11 98
Component Description .......................................11 9 8
CONSULT-II Reference Value in Data Monitor Mode
11 9 8
On Board Diagnosis Logic ...................................11 9 8
DTC Confirmation Procedure ...............................11 9 8
Overall Function Check ........................................11 9 9
Wiring Diagram ....................................................1200
Diagnostic Procedure ...........................................1201
DTC P1140, P1145 IVT CONTROL POSITION SEN-
SOR ........................................................................1203
Component Description .......................................1203
CONSULT-II Reference Value in Data Monitor Mode
1203
On Board Diagnosis Logic ...................................1203
DTC Confirmation Procedure ...............................1203
Wiring Diagram ....................................................1204
Diagnostic Procedure ...........................................1207
Component Inspection .........................................1210
Removal and Installation ......................................1210
DTC P1148, P1168 CLOSED LOOP CONTROL ...1211
On Board Diagnosis Logic ...................................1211
DTC P1211 TCS CONTROL UNIT .........................1212
Description ...........................................................1212
On Board Diagnosis Logic ...................................1212
DTC Confirmation Procedure ...............................1212
Diagnostic Procedure ...........................................1212
DTC P1212 TCS COMMUNICATION LINE ............1213
Description ...........................................................1213
On Board Diagnosis Logic ...................................1213
DTC Confirmation Procedure ...............................1213
Diagnostic Procedure ...........................................1213
DTC P1217 ENGINE OVER TEMPERATURE .......1214
Description ...........................................................1214
CONSULT-II Reference Value in Data Monitor Mode
1215
On Board Diagnosis Logic ...................................1215
Overall Function Check ........................................1215
Wiring Diagram ....................................................1217
Diagnostic Procedure ...........................................1219
Main 13 Causes of Overheating ..........................1223
Component Inspection .........................................1224
DTC P1220 FUEL PUMP CONTROL MODULE

EC-18
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INDEX FOR DTC
Revision: 2007 April2007 M35/M45
P0456 0456 EVAP VERY SML LEAKEC-453
P0460 0460 FUEL LEV SEN SLOSHEC-462
P0461 0461 FUEL LEVEL SENSOREC-464
P0462 0462 FUEL LEVL SEN/CIRCEC-466
P0463 0463 FUEL LEVL SEN/CIRCEC-466
P0500 0500
VEH SPEED SEN/CIRC*5EC-468
P0506 0506 ISC SYSTEMEC-470
P0507 0507 ISC SYSTEMEC-472
P0550 0550 PW ST P SEN/CIRCEC-474
P0603 0603 ECM BACK UP/CIRCUITEC-479
P0605 0605 ECMEC-483
P0643 0643 SENSOR POWER/CIRCEC-486
P0700 0700 TCMAT- 11 2
P0705 0705 PNP SW/CIRCAT- 11 3
P0710 0710 ATF TEMP SEN/CIRCAT-135
P0717 0717 TURBINE SENSORAT- 11 7
P0720 0720
VEH SPD SEN/CIR AT*5AT- 11 9
P0725 0725 ENGINE SPEED SIGAT-124
P0740 0740 TCC SOLENOID/CIRCAT-126
P0744 0744 A/T TCC S/V FNCTNAT-128
P0745 0745 L/PRESS SOL/CIRCAT-130
P0850 0850 P-N POS SW/CIRCUITEC-491
P1148 1148 CLOSED LOOP-B1EC-496
P1168 1168 CLOSED LOOP-B2EC-496
P1211 1211 TCS C/U FUNCTNEC-497
P1212 1212 TCS/CIRCEC-498
P1217 1217 ENG OVER TEMPEC-499
P1220 1220 FPCM/CIRCUITEC-510
P1225 1225 CTP LEARNINGEC-518
P1226 1226 CTP LEARNINGEC-520
P1421 1421 COLD START CONTROLEC-522
P1550 1550 BAT CURRENT SENSOREC-524
P1551 1551 BAT CURRENT SENSOREC-531
P1552 1552 BAT CURRENT SENSOREC-531
P1553 1553 BAT CURRENT SENSOREC-538
P1554 1554 BAT CURRENT SENSOREC-545
P1564 1564 ASCD SWEC-552 (Models with ICC)
EC-559
(Models with ASCD)
P1568 1568
ICC COMMAND VALUE*
6EC-566
P1572 1572 ASCD BRAKE SWEC-567 (Models with ICC)
EC-576
(Models with ASCD)
P1574 1574 ASCD VHL SPD SENEC-584
(Models with ICC)
EC-586
(Models with ASCD) DTC*
1
Items
(CONSULT-II screen terms)Reference page
CONSULT-II
GST*
2ECM*3

EC-22
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INDEX FOR DTC
Revision: 2007 April2007 M35/M45
FUEL LEVL SEN/CIRC P0463 0463EC-466
FUEL LEV SEN SLOSH P0460 0460EC-462
FUEL SYS-LEAN-B1 P0171 0171EC-309
FUEL SYS-LEAN-B2 P0174 0174EC-309
FUEL SYS-RICH-B1 P0172 0172EC-320
FUEL SYS-RICH-B2 P0175 0175EC-320
HLR/C SOL/CIRC P1767 1767AT-159
HLR/C SOL FNCTN P1769 1769AT-161
HO2S2 HTR (B1) P0037 0037EC-177
HO2S2 HTR (B1) P0038 0038EC-177
HO2S2 HTR (B2) P0057 0057EC-177
HO2S2 HTR (B2) P0058 0058EC-177
HO2S2 (B1) P0137 0137EC-274
HO2S2 (B1) P0138 0138EC-285
HO2S2 (B1) P0139 0139EC-298
HO2S2 (B2) P0157 0157EC-274
HO2S2 (B2) P0158 0158EC-285
HO2S2 (B2) P0159 0159EC-298
I/C SOLENOID/CIRC P1752 1752AT-147
I/C SOLENOID FNCTN P1754 1754AT-149
IAT SEN/CIRCUIT P0112 0112EC-209
IAT SEN/CIRCUIT P0113 0113EC-209
IAT SENSOR P0127 0127EC-229
ICC COMMAND VALUE*6P1568 1568EC-566
INT/V TIM CONT-B1 P0011 0011EC-166
INT/V TIM CONT-B2 P0021 0021EC-166
INT/V TIM V/CIR-B1 P0075 0075EC-185
INT/V TIM V/CIR-B2 P0081 0081EC-185
IN PULY SPEED P1715 1715EC-588
ISC SYSTEM P0506 0506EC-470
ISC SYSTEM P0507 0507EC-472
KNOCK SEN/CIRC-B1 P0327 0327EC-359
KNOCK SEN/CIRC-B1 P0328 0328EC-359
L/PRESS SOL/CIRC P0745 0745AT-130
LC/B SOLENOID/CIRC P1772 1772AT-163
LC/B SOLENOID FNCT P1774 1774AT-165
MAF SEN/CIRCUIT P0101 0101EC-193
MAF SEN/CIRCUIT P0102 0102EC-202
MAF SEN/CIRCUIT P0103 0103EC-202
MULTI CYL MISFIRE P0300 0300EC-349
NATS MALFUNCTION P1610 - P1615 1610 - 1615EC-53
Items
(CONSULT-II screen terms)DTC*
1
Reference page
CONSULT-II
GST*
2ECM*3

EC-24
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PRECAUTIONS
Revision: 2007 April2007 M35/M45
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
NBS004RW
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for Procedures without Cowl Top CoverNBS004RX
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
On Board Diagnostic (OBD) System of Engine and A/TNBS004RY
The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:

Be sure to turn the ignition switch OFF and disconnect the negative battery cable before any
repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves,
etc. will cause the MIL to light up.

Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MIL to light up due to the open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)

Certain systems and components, especially those related to OBD, may use a new style slide-
locking type harness connector. For description and how to disconnect, refer to PG-104, "
HAR-
NESS CONNECTOR" .

Be sure to route and secure the harnesses properly after work. The interference of the harness
with a bracket, etc. may cause the MIL to light up due to the short circuit.

Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MIL to light up due to the malfunction of the EVAP system or fuel injection system,
etc.

Be sure to erase the unnecessary malfunction information (repairs completed) from the ECM and
TCM (Transmission control module) before returning the vehicle to the customer.
PIIB3706J

PRECAUTIONS
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B1 indicates the bank 1, B2 indicates the bank 2 as shown
in the figure.

Do not operate fuel pump when there is no fuel in lines.
–Fuel level sensor unit and fuel pump (1)
–Fuel pressure regulator (2)
–Fuel tank temperature sensor (3)

Tighten fuel hose clamps to the specified torque.

Do not depress accelerator pedal when starting.

Immediately after starting, do not rev up engine unneces-
sarily.

Do not rev up engine just prior to shutdown.

When installing C.B. ham radio or a mobile phone, be sure
to observe the following as it may adversely affect elec-
tronic control systems depending on installation location.
–Keep the antenna as far as possible from the electronic
control units.
–Keep the antenna feeder line more than 20 cm (8 in) away
from the harness of electronic controls.
Do not let them run parallel for a long distance.
–Adjust the antenna and feeder line so that the standing-
wave radio can be kept smaller.
–Be sure to ground the radio to vehicle body.
SEC893C
PBIB2707E
SEF709Y
SEF708Y

PREPARATION
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Commercial Service ToolsNBS004S1
Tool name
(Kent-Moore No.)Description
Leak detector
i.e.: (J-41416)Locating the EVAP leak
EVAP service port
adapter
i.e.: (J-41413-OBD)Applying positive pressure through EVAP service
port
Fuel filler cap adapter
i.e.: (MLR-8382)Checking fuel tank vacuum relief valve opening
pressure
Socket wrench Removing and installing engine coolant
temperature sensor
Oxygen sensor thread
cleaner
i.e.: (J-43897-18)
(J-43897-12)Reconditioning the exhaust system threads
before installing a new oxygen sensor. Use with
anti-seize lubricant shown below.
a: 18 mm diameter with pitch 1.5 mm for
Zirconia Oxygen Sensor
b: 12 mm diameter with pitch 1.25 mm for
Titania Oxygen Sensor
Anti-seize lubricant
i.e.: (Permatex
TM
133AR or equivalent
meeting MIL
specification MIL-A-
907)Lubricating oxygen sensor thread cleaning tool
when reconditioning exhaust system threads.
S-NT703
S-NT704
S-NT815
S-NT705
AEM488
S-NT779

ENGINE CONTROL SYSTEM
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Multiport Fuel Injection (MFI) SystemNBS004S3
INPUT/OUTPUT SIGNAL CHART
*1: This sensor is not used to control the engine system under normal conditions.
*2: This signal is sent to the ECM through CAN communication line.
*3: ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION
The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of
time the valve remains open (injection pulse duration). The amount of fuel injected is a program value in the
ECM memory. The program value is preset by engine operating conditions. These conditions are determined
by input signals (for engine speed and intake air) from the crankshaft position sensor (POS), camshaft position
sensor (PHASE) and the mass air flow sensor.
VARIOUS FUEL INJECTION INCREASE/DECREASE COMPENSATION
In addition, the amount of fuel injected is compensated to improve engine performance under various operat-
ing conditions as listed below.


During warm-up

When starting the engine

During acceleration

Hot-engine operation

When selector lever is changed from N to D

High-load, high-speed operation


During deceleration

During high engine speed operation
Sensor Input Signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Engine speed*
3
Piston position
Fuel injection
& mixture ratio
controlFuel injector Camshaft position sensor (PHASE)
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Air fuel ratio (A/F) sensor 1 Density of oxygen in exhaust gas
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Park/neutral position (PNP) switch Gear position
Battery
Battery voltage*
3
Knock sensor Engine knocking condition
Power steering pressure sensor Power steering operation
Heated oxygen sensor 2*
1Density of oxygen in exhaust gas
ABS actuator and electric unit (control unit)
VDC/TCS operation command*
2
Air conditioner switch
Air conditioner operation*2
Wheel sensor
Vehicle speed*2