2007 NISSAN 350Z service

EC-1
ENGINE CONTROL SYSTEM
B ENGINE
CONTENTS
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SECTION EC
A
EC
Revision: 2006 November2007 350Z
ENGINE CONTROL SYSTEM
INDEX FOR DTC ........................................................ 8
DTC No. Index ......................................................... 8
Alphabetical Index .................................................. 13
PRECAUTIONS ........................................................ 18
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ................................................................ 18
Precautions for Battery Service .............................. 18
Precautions for Procedures without Cowl Top Cover ... 18
On Board Diagnostic (OBD) System of Engine and
A/T .......................................................................... 18
Precaution .............................................................. 19
PREPARATION ......................................................... 22
Special Service Tools ............................................. 22
Commercial Service Tools ...................................... 23
ENGINE CONTROL SYSTEM .................................. 24
System Diagram ..................................................... 24
Multiport Fuel Injection (MFI) System .................... 25
Electronic Ignition (EI) System ............................... 27
Fuel Cut Control (at No Load and High Engine
Speed) .................................................................... 28
AIR CONDITIONING CUT CONTROL ..................... 29
Input/Output Signal Chart ....................................... 29
System Description ................................................ 29
AUTOMATIC SPEED CONTROL DEVICE (ASCD) ... 30
System Description ................................................ 30
Component Description .......................................... 31
CAN COMMUNICATION .......................................... 32
System Description ................................................ 32
EVAPORATIVE EMISSION SYSTEM ....................... 33
Description ............................................................. 33
Component Inspection ........................................... 36
Removal and Installation ........................................ 37
How to Detect Fuel Vapor Leakage ....................... 37
ON BOARD REFUELING VAPOR RECOVERY
(ORVR) ...................................................................... 39
System Description ................................................ 39
Diagnostic Procedure ............................................. 40
Component Inspection ........................................... 42
POSITIVE CRANKCASE VENTILATION ................. 44Description .............................................................. 44
Component Inspection ............................................ 45
NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-
NATS) ........................................................................ 46
Description .............................................................. 46
ON BOARD DIAGNOSTIC (OBD) SYSTEM ............ 47
Introduction ............................................................. 47
Two Trip Detection Logic ........................................ 47
Emission-related Diagnostic Information ................ 48
Malfunction Indicator Lamp (MIL) ........................... 62
OBD System Operation Chart ................................ 65
BASIC SERVICE PROCEDURE ............................... 71
Basic Inspection ..................................................... 71
Idle Speed and Ignition Timing Check .................... 76
Procedure After Replacing ECM ............................ 76
VIN Registration ..................................................... 76
Exhaust Valve Timing Control Learning .................. 76
Accelerator Pedal Released Position Learning ...... 77
Throttle Valve Closed Position Learning ................. 77
Idle Air Volume Learning ........................................ 77
Fuel Pressure Check .............................................. 79
TROUBLE DIAGNOSIS ............................................ 81
Trouble Diagnosis Introduction ............................... 81
DTC Inspection Priority Chart ................................. 87
Fail-safe Chart ........................................................ 89
Symptom Matrix Chart ............................................ 90
Engine Control Component Parts Location ............ 94
Vacuum Hose Drawing .........................................100
Circuit Diagram .....................................................101
ECM Harness Connector Terminal Layout ...........103
ECM Terminals and Reference Value ...................103
CONSULT-III Function (ENGINE) .........................116
Generic Scan Tool (GST) Function .......................125
CONSULT-III Reference Value in Data Monitor ....127
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .132
Description ............................................................132
Testing Condition ..................................................132
Inspection Procedure ............................................132
Diagnostic Procedure ...........................................133
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-

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ECA
Revision: 2006 November2007 350Z Description ........................................................... 628
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... 628
On Board Diagnosis Logic ................................... 628
DTC Confirmation Procedure ............................... 628
Wiring Diagram .................................................... 629
Diagnostic Procedure ........................................... 630
Component Inspection ......................................... 632
DTC P2122, P2123 APP SENSOR ........................ 633
Component Description ........................................ 633
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... 633
On Board Diagnosis Logic ................................... 633
DTC Confirmation Procedure ............................... 634
Wiring Diagram .................................................... 635
Diagnostic Procedure ........................................... 637
Component Inspection ......................................... 640
Removal and Installation ...................................... 640
DTC P2127, P2128 APP SENSOR ........................ 641
Component Description ........................................ 641
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... 641
On Board Diagnosis Logic ................................... 641
DTC Confirmation Procedure ............................... 642
Wiring Diagram .................................................... 643
Diagnostic Procedure ........................................... 645
Component Inspection ......................................... 648
Removal and Installation ...................................... 649
DTC P2138 APP SENSOR ..................................... 650
Component Description ........................................ 650
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... 650
On Board Diagnosis Logic ................................... 650
DTC Confirmation Procedure ............................... 651
Wiring Diagram .................................................... 652
Diagnostic Procedure ........................................... 654
Component Inspection ......................................... 658
Removal and Installation ...................................... 658
DTC P2A00, P2A03 A/F SENSOR 1 ...................... 659
Component Description ........................................ 659
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... 659
On Board Diagnosis Logic ................................... 659
DTC Confirmation Procedure ............................... 660
Wiring Diagram .................................................... 661
Diagnostic Procedure ........................................... 665
Removal and Installation ...................................... 670
ASCD BRAKE SWITCH ......................................... 671
Component Description ........................................ 671
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... 671
Wiring Diagram .................................................... 672
Diagnostic Procedure ........................................... 675
Component Inspection ......................................... 680ASCD INDICATOR ..................................................681
Component Description ........................................681
CONSULT-III Reference Value in Data Monitor
Mode .....................................................................681
Wiring Diagram .....................................................682
Diagnostic Procedure ...........................................683
ELECTRICAL LOAD SIGNAL ................................684
Description ............................................................684
CONSULT-III Reference Value in Data Monitor
Mode .....................................................................684
Diagnostic Procedure ...........................................684
FUEL INJECTOR ....................................................686
Component Description ........................................686
CONSULT-III Reference Value in Data Monitor
Mode .....................................................................686
Wiring Diagram .....................................................687
Diagnostic Procedure ...........................................688
Component Inspection ..........................................690
Removal and Installation ......................................690
FUEL PUMP ............................................................691
Description ............................................................691
CONSULT-III Reference Value in Data Monitor
Mode .....................................................................691
Wiring Diagram .....................................................692
Diagnostic Procedure ...........................................693
Component Inspection ..........................................697
Removal and Installation ......................................697
IGNITION SIGNAL ..................................................698
Component Description ........................................698
Wiring Diagram .....................................................699
Diagnostic Procedure ...........................................704
Component Inspection ..........................................708
Removal and Installation ......................................709
REFRIGERANT PRESSURE SENSOR ..................710
Component Description ........................................710
Wiring Diagram .....................................................711
Diagnostic Procedure ...........................................712
Removal and Installation ......................................715
MIL AND DATA LINK CONNECTOR ......................716
Wiring Diagram .....................................................716
SERVICE DATA AND SPECIFICATIONS (SDS) ....718
Fuel Pressure .......................................................718
Idle Speed and Ignition Timing .............................718
Calculated Load Value ..........................................718
Mass Air Flow Sensor ...........................................718
Intake Air Temperature Sensor .............................718
Engine Coolant Temperature Sensor ...................718
Air Fuel Ratio (A/F) Sensor 1 Heater ....................718
Heated Oxygen sensor 2 Heater ..........................718
Crankshaft Position Sensor (POS) .......................718
Camshaft Position Sensor (PHASE) ....................718
Throttle Control Motor ...........................................719
Fuel Injector ..........................................................719
Fuel Pump ............................................................719

EC-18
PRECAUTIONS
Revision: 2006 November2007 350Z
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
NBS00029
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 Battery ServiceNBS0002A
Before disconnecting the battery, lower both the driver and passenger windows. This will prevent any interfer-
ence between the window edge and the vehicle when the door is opened/closed. During normal operation, the
window slightly raises and lowers automatically to prevent any window to vehicle interference. The automatic
window function will not work with the battery disconnected.
Precautions for Procedures without Cowl Top CoverNBS006TI
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/TNBS0002B
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-76, "
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.
PIIB3706J

EC-22
PREPARATION
Revision: 2006 November2007 350Z
PREPARATIONPFP:00002
Special Service ToolsNBS0002E
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool nameDescription
KV10117100
(J-36471-A)
Heated oxygen
sensor wrenchLoosening or tightening heated oxygen sensor
with 22 mm (0.87 in) hexagon nut
KV10114400
(J-38365)
Heated oxygen
sensor wrenchLoosening or tightening heated oxygen sensor
a: 22 mm (0.87 in)
(J-44626)
Air fuel ratio (A/F)
sensor wrenchLoosening or tightening air fuel ratio (A/F) sensor
1
(J-44321)
Fuel pressure gauge
kitChecking fuel pressure
S-NT379
S-NT636
LEM054
LEC642

PREPARATION
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Commercial Service ToolsNBS0002F
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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Revision: 2006 November2007 350Z
Multiport Fuel Injection (MFI) SystemNBS0002I
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 both the crankshaft position sensor 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
22.Exhaust valve timing control magnet
retarder23. A/F sensor 1 24. Heated oxygen sensor 2
25. Knock sensor 26. Crankshaft position sensor (POS) 27. Engine oil temperature sensor
28. Knock sensor 29. Three way catalyst 1 30. Three way catalyst 2
31. Three way catalyst 1 32. Three way catalyst 2 33. Muffler
34. EVAP canister vent control valve 35.EVAP control system pressure sen-
sor36. EVAP service port
37.EVAP canister purge volume con-
trol solenoid valve38. EVAP canister 39. Fuel camper
40. Fuel pump 41. Fuel pressure regulator 42. Fuel level sensor
43. Fuel tank temperature sensor 44. Fuel tank 45. Accelerator pedal position sensor
46. Electric throttle control actuator 47. Throttle position sensor 48.Mass air flow sensor (with intake air
temperature sensor)
49. Air cleaner 50. Electric throttle control actuator 51. Throttle position sensor
52.Mass air flow sensor (with intake air
temperature sensor)53. Air cleaner
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
Knock sensor Engine knocking condition
Battery
Battery voltage*
3
Power steering pressure sensor Power steering operation
Heated oxygen sensor 2*
1Density of oxygen in exhaust gas
Air conditioner switch
Air conditioner operation*
2
Wheel sensor
Vehicle speed*2

EC-34
EVAPORATIVE EMISSION SYSTEM
Revision: 2006 November2007 350Z
EVAPORATIVE EMISSION LINE DRAWING
1. Intake manifold collector 2. EVAP canister purge volume con-
trol solenoid valve3. EVAP service port
:From next page
PBIB3529E

EVAPORATIVE EMISSION SYSTEM
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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 InstallationNBS0002R
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 LeakageNBS0002S
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