2006 INFINITI M35 fuel

INDEX FOR DTC
EC-731
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EC
Revision: 2006 January2006 M35/M45CLOSED LOOP-B2 P1168 1168EC-1236
CMP SEN/CIRC-B1 P0340 0340EC-1106
CONTROL UNIT(CAN) U1010 1010EC-889
CTP LEARNING P1225 1225EC-1259
CTP LEARNING P1226 1226EC-1261
CYL 1 MISFIRE P0301 0301EC-1084
CYL 2 MISFIRE P0302 0302EC-1084
CYL 3 MISFIRE P0303 0303EC-1084
CYL 4 MISFIRE P0304 0304EC-1084
CYL 5 MISFIRE P0305 0305EC-1084
CYL 6 MISFIRE P0306 0306EC-1084
CYL 7 MISFIRE P0307 0307EC-1084
CYL 8 MISFIRE P0308 0308EC-1084
D/C SOLENOID/CIRC P1762 1762AT-155
D/C SOLENOID FNCTN P1764 1764AT-157
ECM P0605 0605EC-1215
ECM BACK UP/CIRCUIT P0603 0603EC-1211
ECT SEN/CIRC P0117 0117EC-948
ECT SEN/CIRC P0118 0118EC-948
ECT SENSOR P0125 0125EC-961
ENG OVER TEMP P1217 1217EC-1239
ETC ACTR P2119 2119EC-1356
ETC FUNCTION/CIRC P2101 2101EC-1344
ETC MOT P2118 2118EC-1351
ETC MOT PWR P2100 2100EC-1338
ETC MOT PWR P2103 2103EC-1338
EVAP GROSS LEAK P0455 0455EC-1178
EVAP PURG FLOW/MON P0441 0441EC-1119
EVAP SMALL LEAK P0442 0442EC-1124
EVAP SYS PRES SEN P0451 0451EC-1160
EVAP SYS PRES SEN P0452 0452EC-1163
EVAP SYS PRES SEN P0453 0453EC-1170
EVAP VERY SML LEAK P0456 0456EC-1185
FPCM/CIRCUIT P1220 1220EC-1251
FR/B SOLENOID/CIRC P1757 1757AT-151
FR/B SOLENOID FNCT P1759 1759AT-153
FTT SEN/CIRCUIT P0182 0182EC-1072
FTT SEN/CIRCUIT P0183 0183EC-1072
FTT SENSOR P0181 0181EC-1066
FUEL LEVEL SENSOR P0461 0461EC-1196
FUEL LEVL SEN/CIRC P0462 0462EC-1198
FUEL LEVL SEN/CIRC P0463 0463EC-1198
Items
(CONSULT-II screen terms)DTC*
1
Reference page
CONSULT-II
GST*
2ECM*3

EC-732
[VK45DE]
INDEX FOR DTC
Revision: 2006 January2006 M35/M45
FUEL LEV SEN SLOSH P0460 0460EC-1194
FUEL SYS-LEAN-B1 P0171 0171EC-1044
FUEL SYS-LEAN-B2 P0174 0174EC-1044
FUEL SYS-RICH-B1 P0172 0172EC-1055
FUEL SYS-RICH-B2 P0175 0175EC-1055
HLR/C SOL/CIRC P1767 1767AT-159
HLR/C SOL FNCTN P1769 1769AT-161
HO2S2 HTR (B1) P0037 0037EC-911
HO2S2 HTR (B1) P0038 0038EC-911
HO2S2 HTR (B2) P0057 0057EC-911
HO2S2 HTR (B2) P0058 0058EC-911
HO2S2 (B1) P0137 0137EC-1009
HO2S2 (B1) P0138 0138EC-1020
HO2S2 (B1) P0139 0139EC-1033
HO2S2 (B2) P0157 0157EC-1009
HO2S2 (B2) P0158 0158EC-1020
HO2S2 (B2) P0159 0159EC-1033
I/C SOLENOID/CIRC P1752 1752AT-147
I/C SOLENOID FNCTN P1754 1754AT-149
IAT SEN/CIRCUIT P0112 0112EC-943
IAT SEN/CIRCUIT P0113 0113EC-943
IAT SENSOR P0127 0127EC-964
ICC COMMAND VALUE*6P1568 1568EC-1301
INT/V TIM CONT-B1 P0011 0011EC-891
INT/V TIM CONT-B2 P0021 0021EC-891
INT/V TIM V/CIR-B1 P0075 0075EC-920
INT/V TIM V/CIR-B2 P0081 0081EC-920
INTK TIM S/CIRC-B1 P1140 1140EC-1228
INTK TIM S/CIRC-B2 P1145 1145EC-1228
IN PULY SPEED P1715 1715EC-1323
ISC SYSTEM P0506 0506EC-1202
ISC SYSTEM P0507 0507EC-1204
KNOCK SEN/CIRC-B1 P0327 0327EC-1094
KNOCK SEN/CIRC-B1 P0328 0328EC-1094
KNOCK SEN/CIRC-B2 P0332 0332EC-1094
KNOCK SEN/CIRC-B2 P0333 0333EC-1094
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-927
MAF SEN/CIRCUIT P0102 0102EC-936
MAF SEN/CIRCUIT P0103 0103EC-936
Items
(CONSULT-II screen terms)DTC*
1
Reference page
CONSULT-II
GST*
2ECM*3

EC-734
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PRECAUTIONS
Revision: 2006 January2006 M35/M45
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
NBS0059C
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.
WAR NING :
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 CoverNBS0059D
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/TNBS0059E
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-102, "
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
EC-737
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Revision: 2006 January2006 M35/M45
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.
PBIB2707E
SEF709Y
SEF708Y

EC-738
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PREPARATION
Revision: 2006 January2006 M35/M45
PREPARATIONPFP:00002
Special Service ToolsNBS0059G
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool nameDescription
EG17650301
(J-33984-A)
Radiator cap tester
adapterAdapting radiator cap tester to radiator cap and
radiator filler neck
a: 28 (1.10) dia.
b: 31.4 (1.236) dia.
c: 41.3 (1.626) dia.
Unit: mm (in)
KV10117100
(J-36471-A)
Heated oxygen
sensor wrenchLoosening or tightening heated oxygen sensor 2
with 22 mm (0.87 in) hexagon nut
KV10114400
(J-38365)
Heated oxygen
sensor wrenchLoosening or tightening air fuel ratio sensor 1
a: 22 mm (0.87 in)
(J-44321)
Fuel pressure gauge
kitChecking fuel pressure
KV109E0010
(J-46209)
Break-out boxMeasuring the ECM signals with a circuit tester
KV109E0080
(J-45819)
Y-cable adapterMeasuring the ECM signals with a circuit tester
S-NT564
S-NT379
S-NT636
LEC642
S-NT825
S-NT826

PREPARATION
EC-739
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Revision: 2006 January2006 M35/M45
Commercial Service ToolsNBS0059H
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
EC-741
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Revision: 2006 January2006 M35/M45
Multiport Fuel Injection (MFI) SystemNBS0059J
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)*
2VDC/TCS operation command
Air conditioner switch*
2Air conditioner operation
Wheel sensor*
2Vehicle speed

EC-742
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ENGINE CONTROL SYSTEM
Revision: 2006 January2006 M35/M45
MIXTURE RATIO FEEDBACK CONTROL (CLOSED LOOP CONTROL)
The mixture ratio feedback system provides the best air-fuel mixture ratio for driveability and emission control.
The three way catalyst (manifold) can then better reduce CO, HC and NOx emissions. This system uses A/F
sensor 1 in the exhaust manifold to monitor whether the engine operation is rich or lean. The ECM adjusts the
injection pulse width according to the sensor voltage signal. For more information about A/F sensor 1, refer to
EC-969
. This maintains the mixture ratio within the range of stoichiometric (ideal air-fuel mixture).
This stage is referred to as the closed loop control condition.
Heated oxygen sensor 2 is located downstream of the three way catalyst (manifold). Even if the switching
characteristics of A/F sensor 1 shift, the air-fuel ratio is controlled to stoichiometric by the signal from heated
oxygen sensor 2.
Open Loop Control
The open loop system condition refers to when the ECM detects any of the following conditions. Feedback
control stops in order to maintain stabilized fuel combustion.
Deceleration and acceleration
High-load, high-speed operation
Malfunction of A/F sensor 1 or its circuit
Insufficient activation of A/F sensor 1 at low engine coolant temperature
High engine coolant temperature
During warm-up
After shifting from N to D
When starting the engine
MIXTURE RATIO SELF-LEARNING CONTROL
The mixture ratio feedback control system monitors the mixture ratio signal transmitted from A/F sensor 1.
This feedback signal is then sent to the ECM. The ECM controls the basic mixture ratio as close to the theoret-
ical mixture ratio as possible. However, the basic mixture ratio is not necessarily controlled as originally
designed. Both manufacturing differences (i.e., mass air flow sensor hot wire) and characteristic changes dur-
ing operation (i.e., fuel injector clogging) directly affect mixture ratio.
Accordingly, the difference between the basic and theoretical mixture ratios is monitored in this system. This is
then computed in terms of “injection pulse duration” to automatically compensate for the difference between
the two ratios.
“Fuel trim” refers to the feedback compensation value compared against the basic injection duration. Fuel trim
includes short term fuel trim and long term fuel trim.
“Short term fuel trim” is the short-term fuel compensation used to maintain the mixture ratio at its theoretical
value. The signal from A/F sensor 1 indicates whether the mixture ratio is RICH or LEAN compared to the the-
oretical value. The signal then triggers a reduction in fuel volume if the mixture ratio is rich, and an increase in
fuel volume if it is lean.
“Long term fuel trim” is overall fuel compensation carried out long-term to compensate for continual deviation
of the short term fuel trim from the central value. Such deviation will occur due to individual engine differences,
wear over time and changes in the usage environment.
PBIB2793E