ignition INFINITI FX35 2005 Service Manual

DI-130
REAR VIEW MONITOR
Revision: 2005 July 2005 FX
13. CHECK COMPOSITE SIGNAL
1. Connect rear view camera control unit connector and display connector.
2. Turn ignition switch ON.
3. Check voltage signal between rear view camera control unit har- ness connector M48 terminal 12 (BR) and ground.
OK or NG
OK >> Replace display.
NG >> Replace rear view camera control unit.
The Rear View Image Is DistortedAKS0068P
1. CHECK SYNCHRO SIGNAL OPEN OR SHORT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear view camera control unit connector and display connector.
3. Check continuity between rear view camera control unit harness connector M48 terminal 14 (Y) and display harness connector
M63 terminal 16 (Y)
4. Check continuity between rear view camera control unit harness connector M48 terminal 14 (Y) and ground
OK or NG
OK >> GO TO 2.
NG >> Repair harness or connector.
2. CHECK COMPOSITE SIGNAL GROUND CIRCUIT
1. Check continuity between rear view camera control unit harness connector M48 terminal 11 and display harness connector M63
terminal 4.
2. Check continuity between rear view camera control unit harness connector M48 terminal 11 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector. 12 (BR) – Ground:
PKIB3583E
SKIA4896E
14 (Y) – 16 (Y) : Continuity should exist.
14 (Y) – Ground : Continuity should not exist.
SKIA5101E
11 – 4 : Continuity should exist.
11 – Ground : Continuity should not exist.
SKIA5102E

REAR VIEW MONITOR DI-131
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3. CHECK REAR VIEW CONTROL UNIT SYNCHRO SIGNAL
1. Connect rear view camera control unit connector and display connector.
2. Turn ignition switch ON.
3. Check voltage signal between rear view camera control unit har- ness connector M48 terminal 14 (Y) and ground.
OK or NG
OK >> Replace rear view camera control unit.
NG >> Replace display.
Removal and Installation of Rear View Camera Control UnitAKS0068Q
REMOVAL
1. Remove instrument clock finisher and A/T console finisher. Refer to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
2. Remove screws (2), and remove rear view camera control unit.
INSTALLATION
Installation is the reverse order of removal.
Removal and Installation of Rear View CameraAKS0068R
REMOVAL
1. Remove back door finisher lower. Refer to EI-45, "Removal and
Installation" .
2. Cut off back door module along the line.
3. Disconnect rear view camera connector. 14 (Y) – Ground:
PKIB3584E
SKIA5896E
SKIA5797E
SKIA6168E

EC-1
ENGINE CONTROL SYSTEM
B ENGINE
CONTENTS
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SECTION EC
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EC
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ENGINE CONTROL SYSTEM
VQ35DE
INDEX FOR DTC ...................................................... 15
DTC No. Index .................................................... ... 15
Alphabetical Index ............................................... ... 19
PRECAUTIONS ..................................................... ... 23
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ... 23
On Board Diagnostic (OBD) System of Engine and
A/T ....................................................................... ... 23
Precaution ........................................................... ... 23
PREPARATION ...................................................... ... 27
Special Service Tools .......................................... ... 27
Commercial Service Tools ................................... ... 29
ENGINE CONTROL SYSTEM ............................... ... 30
System Diagram .................................................. ... 30
Multiport Fuel Injection (MFI) System ................. ... 31
Electronic Ignition (EI) System ............................ ... 33
Fuel Cut Control (at No Load and High Engine
Speed) ................................................................. ... 34
AIR CONDITIONING CUT CONTROL .................. ... 35
Input/Output Signal Chart .................................... ... 35
System Description ............................................. ... 35
AUTOMATIC SPEED CONTROL DEVICE (ASCD) ... 36
System Description ............................................. ... 36
Component Description ....................................... ... 37
CAN COMMUNICATION ....................................... ... 38
System Description ............................................. ... 38
EVAPORATIVE EMISSION SYSTEM .................... ... 39
Description .......................................................... ... 39
Component Inspection ........................................ ... 42
Removal and Installation ..................................... ... 43
How to Detect Fuel Vapor Leakage .................... ... 43
ON BOARD REFUELING VAPOR RECOVERY
(ORVR) ................................................................... ... 46
System Description ............................................. ... 46
Diagnostic Procedure .......................................... ... 47
Component Inspection ........................................ ... 49 POSITIVE CRANKCASE VENTILATION ..............
... 51
Description ........................................................... ... 51
Component Inspection ......................................... ... 51
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-
NATS) ..................................................................... ... 53
Description ........................................................... ... 53
ON BOARD DIAGNOSTIC (OBD) SYSTEM ......... ... 54
Introduction .......................................................... ... 54
Two Trip Detection Logic ..................................... ... 54
Emission-Related Diagnostic Information ............ ... 55
Malfunction Indicator Lamp (MIL) ........................ ... 69
OBD System Operation Chart ............................. ... 72
BASIC SERVICE PROCEDURE ............................ ... 78
Basic Inspection .................................................. ... 78
Idle Speed and Ignition Timing Check ................. ... 83
Idle Mixture Ratio Adjustment .............................. ... 85
VIN Registration .................................................. ... 96
Accelerator Pedal Released Position Learning ... ... 96
Throttle Valve Closed Position Learning .............. ... 96
Idle Air Volume Learning ..................................... ... 97
Fuel Pressure Check ........................................... ... 99
TROUBLE DIAGNOSIS ......................................... .101
Trouble Diagnosis Introduction ............................ .101
DTC Inspection Priority Chart .............................. .107
Fail-Safe Chart .................................................... .109
Symptom Matrix Chart ......................................... .110
Engine Control Component Parts Location ......... .114
Vacuum Hose Drawing ........................................ .120
Circuit Diagram .................................................... .121
ECM Harness Connector Terminal Layout .......... .123
ECM Terminals and Reference Value .................. .123
CONSULT-II Function (ENGINE) ......................... .132
Generic Scan Tool (GST) Function ...................... .144
CONSULT-II Reference Value in Data Monitor .... .147
Major Sensor Reference Graph in Data Monitor
Mode .................................................................... .151
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .153
Description ........................................................... .153
Testing Condition ................................................. .153

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Wiring Diagram ...................................................
. 615
Diagnostic Procedure .......................................... . 616
Component Inspection ........................................ . 618
DTC P2122, P2123 APP SENSOR ....................... . 619
Component Description ....................................... . 619
CONSULT-II Reference Value in Data Monitor Mode . 619
On Board Diagnosis Logic .................................. . 619
DTC Confirmation Procedure .............................. . 620
Wiring Diagram ................................................... . 621
Diagnostic Procedure .......................................... . 622
Component Inspection ........................................ . 624
Removal and Installation ..................................... . 625
DTC P2127, P2128 APP SENSOR ....................... . 626
Component Description ....................................... . 626
CONSULT-II Reference Value in Data Monitor Mode . 626
On Board Diagnosis Logic .................................. . 626
DTC Confirmation Procedure .............................. . 627
Wiring Diagram ................................................... . 628
Diagnostic Procedure .......................................... . 629
Component Inspection ........................................ . 632
Removal and Installation ..................................... . 632
DTC P2135 TP SENSOR ....................................... . 633
Component Description ....................................... . 633
CONSULT-II Reference Value in Data Monitor Mode . 633
On Board Diagnosis Logic .................................. . 633
DTC Confirmation Procedure .............................. . 634
Wiring Diagram ................................................... . 635
Diagnostic Procedure .......................................... . 636
Component Inspection ........................................ . 639
Removal and Installation ..................................... . 639
DTC P2138 APP SENSOR .................................... . 640
Component Description ....................................... . 640
CONSULT-II Reference Value in Data Monitor Mode . 640
On Board Diagnosis Logic .................................. . 640
DTC Confirmation Procedure .............................. . 641
Wiring Diagram ................................................... . 642
Diagnostic Procedure .......................................... . 643
Component Inspection ........................................ . 647
Removal and Installation ..................................... . 647
IGNITION SIGNAL ................................................. . 648
Component Description ....................................... . 648
Wiring Diagram ................................................... . 649
Diagnostic Procedure .......................................... . 654
Component Inspection ........................................ . 659
Removal and Installation ..................................... . 660
INJECTOR CIRCUIT .............................................. . 661
Component Description ....................................... . 661
CONSULT-II Reference Value in Data Monitor Mode . 661
Wiring Diagram ................................................... . 662
Diagnostic Procedure .......................................... . 663
Component Inspection ........................................ . 667
Removal and Installation ..................................... . 667
FUEL PUMP CIRCUIT ........................................... . 668
Description .......................................................... . 668 CONSULT-II Reference Value in Data Monitor Mode
.668
Wiring Diagram .................................................... .669
Diagnostic Procedure .......................................... .670
Component Inspection ......................................... .672
Removal and Installation ..................................... .673
REFRIGERANT PRESSURE SENSOR ................. .674
Component Description ....................................... .674
Wiring Diagram .................................................... .675
Diagnostic Procedure .......................................... .676
Removal and Installation ..................................... .678
ELECTRICAL LOAD SIGNAL ............................... .679
Description ........................................................... .679
CONSULT-II Reference Value in Data Monitor Mode .679
Diagnostic Procedure .......................................... .679
ICC BRAKE SWITCH ............................................ .680
Component Description ....................................... .680
CONSULT-II Reference Value in Data Monitor Mode .680
Wiring Diagram .................................................... .681
Diagnostic Procedure .......................................... .682
Component Inspection ......................................... .687
ASCD BRAKE SWITCH ........................................ .688
Component Description ....................................... .688
CONSULT-II Reference Value in Data Monitor Mode .688
Wiring Diagram .................................................... .689
Diagnostic Procedure .......................................... .690
Component Inspection ......................................... .694
ASCD INDICATOR ................................................. .695
Component Description ....................................... .695
CONSULT-II Reference Value in Data Monitor Mode .695
Wiring Diagram .................................................... .696
Diagnostic Procedure .......................................... .697
SNOW MODE SWITCH ......................................... .698
Description ........................................................... .698
CONSULT-II Reference Value in the Data Monitor
Mode .................................................................... .698
Wiring Diagram .................................................... .699
Diagnostic Procedure .......................................... .700
Component Inspection ......................................... .702
MIL AND DATA LINK CONNECTOR ..................... .703
Wiring Diagram .................................................... .703
SERVICE DATA AND SPECIFICATIONS (SDS) ... .705
Fuel Pressure ...................................................... .705
Idle Speed and Ignition Timing ............................ .705
Calculated Load Value ......................................... .705
Mass Air Flow Sensor .......................................... .705
Intake Air Temperature Sensor ............................ .705
Engine Coolant Temperature Sensor .................. .705
Air Fuel Ratio (A/F) Sensor 1 Heater ................... .705
Heated Oxygen sensor 2 Heater ......................... .705
Crankshaft Position Sensor (POS) ...................... .705
Camshaft Position Sensor (PHASE) ................... .705
Throttle Control Motor .......................................... .705
Injector ................................................................. .706
Fuel Pump ........................................................... .706

EC-8Revision: 2005 July 2005 FX
VK45DE
INDEX FOR DTC .....................................................707
DTC No. Index ..................................................... .707
Alphabetical Index ............................................... .711
PRECAUTIONS ...................................................... .715
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .............................................................. .715
On Board Diagnostic (OBD) System of Engine and
A/T ....................................................................... .715
Precaution ........................................................... .715
PREPARATION ...................................................... .719
Special Service Tools .......................................... .719
Commercial Service Tools ................................... .720
ENGINE CONTROL SYSTEM ............................... .721
System Diagram .................................................. .721
Multiport Fuel Injection (MFI) System .................. .722
Electronic Ignition (EI) System ............................ .724
Fuel Cut Control (at No Load and High Engine
Speed) ................................................................. .725
AIR CONDITIONING CUT CONTROL ................... .726
Input/Output Signal Chart .................................... .726
System Description .............................................. .726
AUTOMATIC SPEED CONTROL DEVICE (ASCD) .727
System Description .............................................. .727
Component Description ....................................... .728
CAN COMMUNICATION ........................................ .729
System Description .............................................. .729
EVAPORATIVE EMISSION SYSTEM .................... .730
Description ........................................................... .730
Component Inspection ......................................... .733
Removal and Installation ..................................... .734
How to Detect Fuel Vapor Leakage ..................... .734
ON BOARD REFUELING VAPOR RECOVERY
(ORVR) ................................................................... .737
System Description .............................................. .737
Diagnostic Procedure .......................................... .738
Component Inspection ......................................... .740
POSITIVE CRANKCASE VENTILATION .............. .742
Description ........................................................... .742
Component Inspection ......................................... .742
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-
NATS) ..................................................................... .744
Description ........................................................... .744
ON BOARD DIAGNOSTIC (OBD) SYSTEM ......... .745
Introduction .......................................................... .745
Two Trip Detection Logic ..................................... .745
Emission-Related Diagnostic Information ............ .746
Malfunction Indicator Lamp (MIL) ........................ .760
OBD System Operation Chart ............................. .764
BASIC SERVICE PROCEDURE ............................ .769
Basic Inspection .................................................. .769
Idle Speed and Ignition Timing Check ................. .774
Idle Mixture Ratio Adjustment .............................. .775
VIN Registration .................................................. .786
Accelerator Pedal Released Position Learning ... .786
Throttle Valve Closed Position Learning .............. .786 Idle Air Volume Learning ......................................
.787
Fuel Pressure Check ........................................... .789
TROUBLE DIAGNOSIS ......................................... .791
Trouble Diagnosis Introduction ............................ .791
DTC Inspection Priority Chart .............................. .797
Fail-Safe Chart ..................................................... .799
Symptom Matrix Chart ......................................... .800
Engine Control Component Parts Location .......... .804
Vacuum Hose Drawing ........................................ .810
Circuit Diagram .................................................... .811
ECM Harness Connector Terminal Layout ........... .813
ECM Terminals and Reference Value .................. .813
CONSULT-II Function (ENGINE) ......................... .822
Generic Scan Tool (GST) Function ...................... .835
CONSULT-II Reference Value in Data Monitor .... .838
Major Sensor Reference Graph in Data Monitor
Mode .................................................................... .842
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .844
Description ........................................................... .844
Testing Condition ................................................. .844
Inspection Procedure ........................................... .844
Diagnostic Procedure ........................................... .845
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT ...................................................................... .854
Description ........................................................... .854
Diagnostic Procedure ........................................... .854
POWER SUPPLY AND GROUND CIRCUIT .......... .855
Wiring Diagram .................................................... .855
Diagnostic Procedure ........................................... .856
Ground Inspection ................................................ .861
DTC U1000, U1001 CAN COMMUNICATION LINE .862
Description ........................................................... .862
On Board Diagnosis Logic ................................... .862
DTC Confirmation Procedure ............................... .862
Wiring Diagram .................................................... .863
Diagnostic Procedure ........................................... .864
DTC P0011, P0021 IVT CONTROL ........................ .865
Description ........................................................... .865
CONSULT-II Reference Value in Data Monitor Mode .866
On Board Diagnosis Logic ................................... .866
DTC Confirmation Procedure ............................... .867
Wiring Diagram .................................................... .868
Diagnostic Procedure ........................................... .871
Component Inspection ......................................... .875
Removal and Installation ...................................... .876
DTC P0031, P0032, P0051, P0052 HO2S1 HEATER .877
Description ........................................................... .877
CONSULT-II Reference Value in Data Monitor Mode .877
On Board Diagnosis Logic ................................... .877
DTC Confirmation Procedure ............................... .878
Wiring Diagram .................................................... .879
Diagnostic Procedure ........................................... .882
Component Inspection ......................................... .884
Removal and Installation ...................................... .884
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER .885
Description ........................................................... .885
CONSULT-II Reference Value in Data Monitor Mode

EC-14Revision: 2005 July 2005 FX
Diagnostic Procedure ..........................................
1305
Component Inspection ......................................... 1307
Removal and Installation ..................................... 1308
DTC P2127, P2128 APP SENSOR ........................ 1309
Component Description ....................................... 1309
CONSULT-II Reference Value in Data Monitor Mode 1309
On Board Diagnosis Logic ................................... 1309
DTC Confirmation Procedure .............................. 1310
Wiring Diagram .................................................... 1311
Diagnostic Procedure .......................................... 1312
Component Inspection ......................................... 1315
Removal and Installation ..................................... 1315
DTC P2135 TP SENSOR ....................................... 1316
Component Description ....................................... 1316
CONSULT-II Reference Value in Data Monitor Mode 1316
On Board Diagnosis Logic ................................... 1316
DTC Confirmation Procedure .............................. 1317
Wiring Diagram .................................................... 1318
Diagnostic Procedure .......................................... 1319
Component Inspection ......................................... 1322
Removal and Installation ..................................... 1322
DTC P2138 APP SENSOR .................................... 1323
Component Description ....................................... 1323
CONSULT-II Reference Value in Data Monitor Mode 1323
On Board Diagnosis Logic ................................... 1323
DTC Confirmation Procedure .............................. 1324
Wiring Diagram .................................................... 1325
Diagnostic Procedure .......................................... 1326
Component Inspection ......................................... 1330
Removal and Installation ..................................... 1330
VARIABLE INDUCTION AIR CONTROL SYSTEM
(VIAS) ..................................................................... 1331
Description ........................................................... 1331
CONSULT-II Reference Value in Data Monitor Mode 1332
Wiring Diagram .................................................... 1333
Diagnostic Procedure .......................................... 1334
Component Inspection ......................................... 1337
Removal and Installation ..................................... 1338
IGNITION SIGNAL ................................................. 1339
Component Description ....................................... 1339
Wiring Diagram .................................................... 1340
Diagnostic Procedure .......................................... 1345
Component Inspection ......................................... 1349
Removal and Installation ..................................... 1350
INJECTOR CIRCUIT .............................................. 1351
Component Description ....................................... 1351
CONSULT-II Reference Value in Data Monitor Mode 1351
Wiring Diagram .................................................... 1352
Diagnostic Procedure .......................................... 1353
Component Inspection ......................................... 1357
Removal and Installation ..................................... 1357
FUEL PUMP CIRCUIT ........................................... 1358
Description ........................................................... 1358
CONSULT-II Reference Value in Data Monitor Mode 1358
Wiring Diagram .................................................... 1359
Diagnostic Procedure ........................................... 1360
Component Inspection ......................................... 1363
Removal and Installation ...................................... 1363
REFRIGERANT PRESSURE SENSOR ................. 1364
Component Description ....................................... 1364
Wiring Diagram .................................................... 1365
Diagnostic Procedure ........................................... 1366
Removal and Installation ...................................... 1368
ELECTRICAL LOAD SIGNAL ............................... 1369
Description ........................................................... 1369
CONSULT-II Reference Value in Data Monitor Mode 1369
Diagnostic Procedure ........................................... 1369
ICC BRAKE SWITCH ............................................. 1370
Component Description ....................................... 1370
CONSULT-II Reference Value in Data Monitor Mode 1370
Wiring Diagram .................................................... 1371
Diagnostic Procedure ........................................... 1372
Component Inspection ......................................... 1377
ASCD BRAKE SWITCH ......................................... 1378
Component Description ....................................... 1378
CONSULT-II Reference Value in Data Monitor Mode 1378
Wiring Diagram .................................................... 1379
Diagnostic Procedure ........................................... 1380
Component Inspection ......................................... 1384
ASCD INDICATOR ................................................. 1385
Component Description ....................................... 1385
CONSULT-II Reference Value in Data Monitor Mode
1385
Wiring Diagram .................................................... 1386
Diagnostic Procedure ........................................... 1387
SNOW MODE SWITCH .......................................... 1388
Description ........................................................... 1388
CONSULT-II Reference Value in the Data Monitor
Mode .................................................................... 1388
Wiring Diagram .................................................... 1389
Diagnostic Procedure ........................................... 1390
Component Inspection ......................................... 1392
MIL AND DATA LINK CONNECTOR ..................... 1393
Wiring Diagram .................................................... 1393
SERVICE DATA AND SPECIFICATIONS (SDS) ... 1395
Fuel Pressure ....................................................... 1395
Idle Speed and Ignition Timing ............................. 1395
Calculated Load Value ......................................... 1395
Mass Air Flow Sensor .......................................... 1395
Intake Air Temperature Sensor ............................ 1395
Engine Coolant Temperature Sensor ................... 1395
Fuel Tank Temperature Sensor ............................ 1395
Crankshaft Position Sensor (POS) ...................... 1395
Camshaft Position Sensor (PHASE) .................... 1395
Heated Oxygen Sensor 1 Heater ......................... 1395
Heated Oxygen sensor 2 Heater ......................... 1396
Throttle Control Motor .......................................... 1396
Injector ................................................................. 1396
Fuel Pump ............................................................ 1396

PRECAUTIONS EC-23
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PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
ABS00A2R
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.
On Board Diagnostic (OBD) System of Engine and A/TABS006JZ
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-74, "
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.
PrecautionABS006K0

Always use a 12 volt battery as power source.

Do not attempt to disconnect battery cables while engine is
running.

Before connecting or disconnecting the ECM harness con-
nector, turn ignition switch OFF and disconnect negative
battery cable. Failure to do so may damage the ECM
because battery voltage is applied to ECM even if ignition
switch is turned OFF.

Before removing parts, turn ignition switch OFF and then
disconnect negative battery cable.
SEF289H

ENGINE CONTROL SYSTEM EC-33
[VQ35DE]
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FUEL INJECTION TIMING
Two types of systems are used.
Sequential Multiport Fuel Injection System
Fuel is injected into each cylinder during each engine cycle according to the firing order. This system is used
when the engine is running.
Simultaneous Multiport Fuel Injection System
Fuel is injected simultaneously into all six cylinders twice each engine cycle. In other words, pulse signals of
the same width are simultaneously transmitted from the ECM.
The six injectors will then receive the signals two times for each engine cycle.
This system is used when the engine is being started and/or if the fail-safe system (CPU) is operating.
FUEL SHUT-OFF
Fuel to each cylinder is cut off during deceleration, operation of the engine at excessively high speeds or oper-
ation of the vehicle at excessively high speeds.
Electronic Ignition (EI) SystemABS006K8
INPUT/OUTPUT SIGNAL CHART
*1: This signal is sent to the ECM through CAN communication line.
*2: ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION
Firing order: 1 - 2 - 3 - 4 - 5 - 6
The ignition timing is controlled by the ECM to maintain the best air-fuel ratio for every running condition of the
engine. The ignition timing data is stored in the ECM.
The ECM receives information such as the injection pulse width and camshaft position sensor (PHASE) sig-
nal. Computing this information, ignition signals are transmitted to the power transistor.
During the following conditions, the ignition timing is revised by the ECM according to the other data stored in
the ECM.

At starting

During warm-up

At idle

At low battery voltage
SEF179U
Sensor Input Signal to ECM ECM function Actuator
Crankshaft position sensor (POS) Engine speed*
2
Piston position
Ignition timing
control Power transistor
Camshaft position sensor (PHASE)
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Knock sensor Engine knocking
Park/neutral position (PNP) switch Gear position
Battery Battery voltage*
2
Wheel sensor*1Vehicle speed

EC-34
[VQ35DE]
ENGINE CONTROL SYSTEM
Revision: 2005 July 2005 FX

During acceleration
The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed
within the anti-knocking zone, if recommended fuel is used under dry conditions. The retard system does not
operate under normal driving conditions. If engine knocking occurs, the knock sensor monitors the condition.
The signal is transmitted to the ECM. The ECM retards the ignition timing to eliminate the knocking condition.
Fuel Cut Control (at No Load and High Engine Speed)ABS006KA
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM through CAN communication line.
SYSTEM DESCRIPTION
If the engine speed is above 1,800 rpm under no load (for example, the shift position is neutral and engine
speed is over 1,800 rpm) fuel will be cut off after some time. The exact time when the fuel is cut off varies
based on engine speed.
Fuel cut will be operated until the engine speed reaches 1,500 rpm, then fuel cut will be cancelled.
NOTE:
This function is different from deceleration control listed under EC-31, "
Multiport Fuel Injection (MFI) System" .
Sensor Input Signal to ECM ECM function Actuator
Park/neutral position (PNP) switch Neutral position
Fuel cut con-
trol Fuel injector
Accelerator pedal position sensor Accelerator pedal position
Engine coolant temperature sensor Engine coolant temperature
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE) Engine speed
Wheel sensor* Vehicle speed

EC-44
[VQ35DE]
EVAPORATIVE EMISSION SYSTEM
Revision: 2005 July 2005 FX
WITH CONSULT-II
1. Attach the EVAP service port adapter securely to the EVAP service port.
2. Also attach the pressure pump and hose to the EVAP service port adapter.
3. Turn ignition switch ON.
4. Select the “EVAP SYSTEM CLOSE” of “WORK SUPPORT MODE” with CONSULT-II.
5. Touch “START”. A bar graph (Pressure indicating display) will appear on the screen.
6. Apply positive pressure to the EVAP system until the pressure indicator reaches the middle of the bar graph.
7. Remove EVAP service port adapter and hose with pressure pump.
8. Locate the leak using a leak detector. Refer to EC-40, "
EVAPO-
RATIVE EMISSION LINE DRAWING" .
WITHOUT CONSULT-II
1. Attach the EVAP service port adapter securely to the EVAP ser-
vice port.
2. Also attach the pressure pump with pressure gauge to the EVAP service port adapter.
PEF838U
PEF917U
SEF200U
SEF462UA