2005 INFINITI FX35 Throttle valve

EC-4Revision: 2005 July 2005 FX
On Board Diagnosis Logic ...................................
.350
DTC Confirmation Procedure .............................. .351
Diagnostic Procedure .......................................... .351
Component Inspection ......................................... .352
DTC P0452 EVAP CONTROL SYSTEM PRESSURE
SENSOR ................................................................. .353
Component Description ....................................... .353
CONSULT-II Reference Value in Data Monitor Mode .353
On Board Diagnosis Logic ................................... .353
DTC Confirmation Procedure .............................. .354
Wiring Diagram .................................................... .355
Diagnostic Procedure .......................................... .356
Component Inspection ......................................... .358
DTC P0453 EVAP CONTROL SYSTEM PRESSURE
SENSOR ................................................................. .359
Component Description ....................................... .359
CONSULT-II Reference Value in Data Monitor Mode .359
On Board Diagnosis Logic ................................... .359
DTC Confirmation Procedure .............................. .360
Wiring Diagram .................................................... .361
Diagnostic Procedure .......................................... .362
Component Inspection ......................................... .366
DTC P0455 EVAP CONTROL SYSTEM ................ .367
On Board Diagnosis Logic ................................... .367
DTC Confirmation Procedure .............................. .368
Diagnostic Procedure .......................................... .369
DTC P0456 EVAP CONTROL SYSTEM ................ .375
On Board Diagnosis Logic ................................... .375
DTC Confirmation Procedure .............................. .376
Overall Function Check ....................................... .377
Diagnostic Procedure .......................................... .378
DTC P0460 FUEL LEVEL SENSOR ...................... .385
Component Description ....................................... .385
On Board Diagnosis Logic ................................... .385
DTC Confirmation Procedure .............................. .385
Diagnostic Procedure .......................................... .386
Removal and Installation ..................................... .386
DTC P0461 FUEL LEVEL SENSOR ...................... .387
Component Description ....................................... .387
On Board Diagnosis Logic ................................... .387
Overall Function Check ....................................... .387
Diagnostic Procedure .......................................... .388
Removal and Installation ..................................... .388
DTC P0462, P0463 FUEL LEVEL SENSOR ......... .389
Component Description ....................................... .389
On Board Diagnosis Logic ................................... .389
DTC Confirmation Procedure .............................. .389
Diagnostic Procedure .......................................... .390
Removal and Installation ..................................... .390
DTC P0500 VSS ..................................................... .391
Description ........................................................... .391
On Board Diagnosis Logic ................................... .391
DTC Confirmation Procedure .............................. .391
Overall Function Check ....................................... .391
Diagnostic Procedure .......................................... .392
DTC P0506 ISC SYSTEM ...................................... .393
Description ........................................................... .393 On Board Diagnosis Logic ...................................
.393
DTC Confirmation Procedure ............................... .393
Diagnostic Procedure ........................................... .394
DTC P0507 ISC SYSTEM ...................................... .395
Description ........................................................... .395
On Board Diagnosis Logic ................................... .395
DTC Confirmation Procedure ............................... .395
Diagnostic Procedure ........................................... .396
DTC P0550 PSP SENSOR ..................................... .397
Component Description ....................................... .397
CONSULT-II Reference Value in Data Monitor Mode .397
On Board Diagnosis Logic ................................... .397
DTC Confirmation Procedure ............................... .397
Wiring Diagram .................................................... .398
Diagnostic Procedure ........................................... .399
Component Inspection ......................................... .401
Removal and Installation ...................................... .401
DTC P0605 ECM .................................................... .402
Component Description ....................................... .402
On Board Diagnosis Logic ................................... .402
DTC Confirmation Procedure ............................... .402
Diagnostic Procedure ........................................... .403
DTC P1031, P1032, P1051, P1052 A/F SENSOR 1
HEATER .................................................................. .405
Description ........................................................... .405
CONSULT-II Reference Value in Data Monitor Mode .405
On Board Diagnosis Logic ................................... .405
DTC Confirmation Procedure ............................... .405
Wiring Diagram .................................................... .407
Diagnostic Procedure ........................................... .410
Component Inspection ......................................... .412
Removal and Installation ...................................... .412
DTC P1065 ECM POWER SUPPLY ....................... .413
Component Description ....................................... .413
On Board Diagnosis Logic ................................... .413
DTC Confirmation Procedure ............................... .413
Wiring Diagram .................................................... .414
Diagnostic Procedure ........................................... .415
D T C P1111, P 1 136 IVT CONTROL SOLENOID
VALVE ..................................................................... .417
Component Description ....................................... .417
CONSULT-II Reference Value in Data Monitor Mode .417
On Board Diagnosis Logic ................................... .417
DTC Confirmation Procedure ............................... .417
Wiring Diagram .................................................... .418
Diagnostic Procedure ........................................... .421
Component Inspection ......................................... .422
Removal and Installation ...................................... .423
DTC P1121 ELECTRIC THROTTLE CONTROL
ACTUATOR ............................................................ .424
Component Description ....................................... .424
On Board Diagnosis Logic ................................... .424
DTC Confirmation Procedure ............................... .424
Diagnostic Procedure ........................................... .425
DTC P1122 ELECTRIC THROTTLE CONTROL

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

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SENSOR ................................................................
1083
Component Description ....................................... 1083
CONSULT-II Reference Value in Data Monitor Mode 1083
On Board Diagnosis Logic .................................. 1083
DTC Confirmation Procedure .............................. 1084
Diagnostic Procedure .......................................... 1084
Component Inspection ........................................ 1085
DTC P0452 EVAP CONTROL SYSTEM PRESSURE
SENSOR ................................................................ 1086
Component Description ....................................... 1086
CONSULT-II Reference Value in Data Monitor Mode 1086
On Board Diagnosis Logic .................................. 1086
DTC Confirmation Procedure .............................. 1087
Wiring Diagram ................................................... 1088
Diagnostic Procedure .......................................... 1089
Component Inspection ........................................ 1091
DTC P0453 EVAP CONTROL SYSTEM PRESSURE
SENSOR ................................................................ 1092
Component Description ....................................... 1092
CONSULT-II Reference Value in Data Monitor Mode 1092
On Board Diagnosis Logic .................................. 1092
DTC Confirmation Procedure .............................. 1093
Wiring Diagram ................................................... 1094
Diagnostic Procedure .......................................... 1095
Component Inspection ........................................ 1099
DTC P0455 EVAP CONTROL SYSTEM ...............1100 On Board Diagnosis Logic ..................................1100
DTC Confirmation Procedure ..............................1101
Diagnostic Procedure ..........................................1102
DTC P0456 EVAP CONTROL SYSTEM ...............1108 On Board Diagnosis Logic ..................................1108
DTC Confirmation Procedure ..............................1109
Overall Function Check .......................................1110
Diagnostic Procedure .......................................... 1111
DTC P0460 FUEL LEVEL SENSOR .....................1117 Component Description .......................................1117
On Board Diagnosis Logic ..................................1117
DTC Confirmation Procedure ..............................1117
Diagnostic Procedure ..........................................1118
Removal and Installation .....................................1118
DTC P0461 FUEL LEVEL SENSOR .....................1119 Component Description .......................................1119
On Board Diagnosis Logic ..................................1119
Overall Function Check .......................................1119
Diagnostic Procedure ..........................................1120
Removal and Installation .....................................1120
DTC P0462, P0463 FUEL LEVEL SENSOR CIR-
CUIT .......................................................................1121 Component Description .......................................1121
On Board Diagnosis Logic ..................................1121
DTC Confirmation Procedure ..............................1121
Diagnostic Procedure ..........................................1122
Removal and Installation .....................................1122
DTC P0500 VSS ....................................................1123 Description ..........................................................1123
On Board Diagnosis Logic ..................................1123 DTC Confirmation Procedure ..............................
11 2 3
Overall Function Check ....................................... 11 2 4
Diagnostic Procedure .......................................... 11 2 4
DTC P0506 ISC SYSTEM ...................................... 112 5
Description ........................................................... 11 2 5
On Board Diagnosis Logic ................................... 11 2 5
DTC Confirmation Procedure .............................. 11 2 5
Diagnostic Procedure .......................................... 11 2 6
DTC P0507 ISC SYSTEM ...................................... 112 7
Description ........................................................... 11 2 7
On Board Diagnosis Logic ................................... 11 2 7
DTC Confirmation Procedure .............................. 11 2 7
Diagnostic Procedure .......................................... 11 2 8
DTC P0550 PSP SENSOR .................................... 112 9
Component Description ....................................... 11 2 9
CONSULT-II Reference Value in Data Monitor Mode 11 2 9
On Board Diagnosis Logic ................................... 11 2 9
DTC Confirmation Procedure .............................. 11 2 9
Wiring Diagram .................................................... 11 3 0
Diagnostic Procedure .......................................... 11 3 1
Component Inspection ......................................... 11 3 3
Removal and Installation ..................................... 11 3 3
DTC P0605 ECM .................................................... 113 4
Component Description ....................................... 11 3 4
On Board Diagnosis Logic ................................... 11 3 4
DTC Confirmation Procedure .............................. 11 3 4
Diagnostic Procedure .......................................... 11 3 5
DTC P1065 ECM POWER SUPPLY ...................... 113 7
Component Description ....................................... 11 3 7
On Board Diagnosis Logic ................................... 11 3 7
DTC Confirmation Procedure .............................. 11 3 7
Wiring Diagram .................................................... 11 3 8
Diagnostic Procedure .......................................... 11 3 9
DTC P1111, P1136 IVT CONTROL SOLENOID
VALVE .................................................................... 114 1
Component Description ....................................... 11 4 1
CONSULT-II Reference Value in Data Monitor Mode 11 4 1
On Board Diagnosis Logic ................................... 11 4 1
DTC Confirmation Procedure .............................. 11 4 1
Wiring Diagram .................................................... 11 4 2
Diagnostic Procedure .......................................... 11 4 5
Component Inspection ......................................... 11 4 7
Removal and Installation ..................................... 11 4 7
DTC P1121 ELECTRIC THROTTLE CONTROL
ACTUATOR ............................................................ 114 8
Component Description ....................................... 11 4 8
On Board Diagnosis Logic ................................... 11 4 8
DTC Confirmation Procedure .............................. 11 4 8
Diagnostic Procedure .......................................... 11 4 9
DTC P1122 ELECTRIC THROTTLE CONTROL
FUNCTION ............................................................. 115 0
Description ........................................................... 11 5 0
On Board Diagnosis Logic ................................... 11 5 0
DTC Confirmation Procedure .............................. 11 5 0
Wiring Diagram .................................................... 11 5 1
Diagnostic Procedure .......................................... 11 5 2

ENGINE CONTROL SYSTEM EC-31
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Multiport Fuel Injection (MFI) SystemABS006K7
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

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
control Fuel 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*
2Air conditioner operation
Wheel sensor*
2Vehicle speed

POSITIVE CRANKCASE VENTILATION EC-51
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POSITIVE CRANKCASE VENTILATIONPFP:11810
DescriptionABS006ZE
SYSTEM DESCRIPTION
This system returns blow-by gas to the intake manifold.
The positive crankcase ventilation (PCV) valve is provided to conduct crankcase blow-by gas to the intake
manifold. During partial throttle operation of the engine, the intake manifold sucks the blow-by gas through the
PCV valve. Normally, the capacity of the valve is sufficient to handle any blow-by and a small amount of venti-
lating air. The ventilating air is then drawn from the air inlet tubes into the crankcase. In this process the air
passes through the hose connecting air inlet tubes to rocker cover. Under full-throttle condition, the manifold
vacuum is insufficient to draw the blow-by flow through the valve. The flow goes through the hose connection
in the reverse direction.
On vehicles with an excessively high blow-by, the valve does not
meet the requirement. This is because some of the flow will go
through the hose connection to the air inlet tubes under all condi-
tions.
Component InspectionABS006ZF
PCV (POSITIVE CRANKCASE VENTILATION) VALVE
With engine running at idle, remove PCV valve from rocker cover. A
properly working valve makes a hissing noise as air passes through
it. A strong vacuum should be felt immediately when a finger is
placed over valve inlet.
SEC921C
PBIB1588E
PBIB1589E

BASIC SERVICE PROCEDURE EC-79
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3. CHECK TARGET IDLE SPEED
With CONSULT-II
1. Run engine at about 2,000 rpm for about 2 minutes under no-load.
2. Rev engine (2,000 to 3,000 rpm) 2 or 3 times under no-load, then run engine at idle speed for about 1 minute.
3. Read idle speed in “DATA MONITOR” mode with CONSULT-II. Refer to EC-83, "
IDLE SPEED" .
Without CONSULT-II
1. Run engine at about 2,000 rpm for about 2 minutes under no-load.
2. Rev engine (2,000 to 3,000 rpm) 2 or 3 times under no-load, then run engine at idle speed for about 1 minute.
3. Check idle speed. Refer to EC-83, "
IDLE SPEED" .
OK or NG
OK >> GO TO 9.
NG >> GO TO 4.
4. PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
1. Stop engine.
2. Perform EC-96, "
Accelerator Pedal Released Position Learning" .
>> GO TO 5.
5. PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform EC-96, "
Throttle Valve Closed Position Learning" .
>> GO TO 6.
PBIA8513J
650 ± 50 rpm (in P or N position)
SEF058Y
650 ± 50 rpm (in P or N position)

BASIC SERVICE PROCEDURE EC-81
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10. CHECK IGNITION TIMING
1. Run engine at idle.
2. Check ignition timing with a timing light. Refer to EC-83, "
IGNITION TIMING" .
OK or NG
OK >> GO TO 19.
NG >> GO TO 11.
11 . PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
1. Stop engine.
2. Perform EC-96, "
Accelerator Pedal Released Position Learning" .
>> GO TO 12.
12. PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform EC-96, "
Throttle Valve Closed Position Learning" .
>> GO TO 13.
13. PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-97, "
Idle Air Volume Learning" .
Is Idle Air Volume Learning carried out successfully?
Ye s o r N o
Ye s > > G O T O 1 4 .
No >> 1. Follow the instruction of Idle Air Volume Learning.
2. GO TO 4.
14. CHECK TARGET IDLE SPEED AGAIN
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Read idle speed in “DATA MONITOR” mode with CONSULT-II. Refer to EC-83, "
IDLE SPEED" .
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed. Refer to EC-83, "
IDLE SPEED" .
OK or NG
OK >> GO TO 15.
NG >> GO TO 17. 15
± 5 ° BTDC (in P or N position)
PBIB1602E
650 ± 50 rpm (in P or N position)
650 ± 50 rpm (in P or N position)
SEF174Y

BASIC SERVICE PROCEDURE EC-85
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Idle Mixture Ratio AdjustmentABS00E91
PREPARATION
1. Make sure that the following parts are in good order.

Battery

Ignition system

Engine oil and coolant levels

Fuses

ECM harness connector

Va c u u m h o s e s

Air intake system
(Oil filler cap, oil level gauge, etc.)

Fuel pressure

Engine compression

Throttle valve

Evaporative emission system
2. On air conditioner equipped models, checks should be carried out while the air conditioner is OFF.
3. On automatic transmission equipped models, when checking idle rpm, ignition timing and mixture ratio, checks should be carried out while selector lever is in P or N position.
4. When measuring CO percentage, insert probe more than 40 cm (15.7 in) into tail pipe.
5. Turn OFF headlamp, heater blower, rear window defogger.
6. Keep front wheels pointed straight ahead.