2004 INFINITI FX35 Cylinder

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Revision: 2004 November 2004 FX35/FX45Diagnostic Procedure ........................................... 232
Component Inspection ......................................... 234
Removal and Installation ...................................... 235
DTC P0138, P0158 HO2S2 .................................... 236
Component Description ........................................ 236
CONSULT-II Reference Value in Data Monitor Mode
. 236
On Board Diagnosis Logic ................................... 236
DTC Confirmation Procedure ............................... 237
Wiring Diagram .................................................... 238
Diagnostic Procedure ........................................... 241
Component Inspection ......................................... 243
Removal and Installation ...................................... 244
DTC P0139, P0159 HO2S2 .................................... 245
Component Description ........................................ 245
CONSULT-II Reference Value in Data Monitor Mode
. 245
On Board Diagnosis Logic ................................... 245
DTC Confirmation Procedure ............................... 246
Overall Function Check ........................................ 246
Wiring Diagram .................................................... 248
Diagnostic Procedure ........................................... 251
Component Inspection ......................................... 253
Removal and Installation ...................................... 255
DTC P0171, P0174 FUEL INJECTION SYSTEM
FUNCTION .............................................................. 256
On Board Diagnosis Logic ................................... 256
DTC Confirmation Procedure ............................... 256
Wiring Diagram .................................................... 258
Diagnostic Procedure ........................................... 260
DTC P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION .............................................................. 265
On Board Diagnosis Logic ................................... 265
DTC Confirmation Procedure ............................... 265
Wiring Diagram .................................................... 267
Diagnostic Procedure ........................................... 269
DTC P0181 FTT SENSOR ...................................... 273
Component Description ........................................ 273
On Board Diagnosis Logic ................................... 273
DTC Confirmation Procedure ............................... 273
Wiring Diagram .................................................... 275
Diagnostic Procedure ........................................... 276
Component Inspection ......................................... 277
Removal and Installation ...................................... 278
DTC P0182, P0183 FTT SENSOR ......................... 279
Component Description ........................................ 279
On Board Diagnosis Logic ................................... 279
DTC Confirmation Procedure ............................... 279
Wiring Diagram .................................................... 280
Diagnostic Procedure ........................................... 281
Component Inspection ......................................... 282
Removal and Installation ...................................... 283
DTC P0222, P0223 TP SENSOR ........................... 284
Component Description ........................................ 284
CONSULT-II Reference Value in Data Monitor Mode
. 284
On Board Diagnosis Logic ................................... 284
DTC Confirmation Procedure ............................... 285
Wiring Diagram .................................................... 286Diagnostic Procedure ...........................................287
Component Inspection ..........................................290
Removal and Installation ......................................290
DTC P0300 - P0306 MULTIPLE CYLINDER MIS-
FIRE, NO. 1 - 6 CYLINDER MISFIRE .....................291
On Board Diagnosis Logic ....................................291
DTC Confirmation Procedure ...............................291
Diagnostic Procedure ...........................................292
DTC P0327, P0328 KS ...........................................297
Component Description ........................................297
On Board Diagnosis Logic ....................................297
DTC Confirmation Procedure ...............................297
Wiring Diagram .....................................................298
Diagnostic Procedure ...........................................299
Component Inspection ..........................................300
Removal and Installation ......................................301
DTC P0335 CKP SENSOR (POS) ..........................302
Component Description ........................................302
CONSULT-II Reference Value in Data Monitor Mode
.302
On Board Diagnosis Logic ....................................302
DTC Confirmation Procedure ...............................302
Wiring Diagram .....................................................303
Diagnostic Procedure ...........................................304
Component Inspection ..........................................307
Removal and Installation ......................................307
DTC P0340, P0345 CMP SENSOR (PHASE) ........308
Component Description ........................................308
CONSULT-II Reference Value in Data Monitor Mode
.308
On Board Diagnosis Logic ....................................308
DTC Confirmation Procedure ...............................308
Wiring Diagram .....................................................309
Diagnostic Procedure ...........................................312
Component Inspection ..........................................315
Removal and Installation ......................................315
DTC P0420, P0430 THREE WAY CATALYST FUNC-
TION ........................................................................316
On Board Diagnosis Logic ....................................316
DTC Confirmation Procedure ...............................316
Overall Function Check ........................................317
Diagnostic Procedure ...........................................318
DTC P0441 EVAP CONTROL SYSTEM .................321
System Description ...............................................321
On Board Diagnosis Logic ....................................321
DTC Confirmation Procedure ...............................321
Overall Function Check ........................................322
Diagnostic Procedure ...........................................323
DTC P0442 EVAP CONTROL SYSTEM .................326
On Board Diagnosis Logic ....................................326
DTC Confirmation Procedure ...............................327
Diagnostic Procedure ...........................................328
DTC P0444, P0445 EVAP CANISTER PURGE VOL-
UME CONTROL SOLENOID VALVE ......................335
Description ............................................................335
CONSULT-II Reference Value in Data Monitor Mode
.335
On Board Diagnosis Logic ....................................336
DTC Confirmation Procedure ...............................336

EC-10Revision: 2004 November 2004 FX35/FX45DTC Confirmation Procedure ...............................937
Wiring Diagram .....................................................938
Diagnostic Procedure ...........................................939
Component Inspection ..........................................941
Removal and Installation ......................................941
DTC P0222, P0223 TP SENSOR ............................942
Component Description ........................................942
CONSULT-II Reference Value in Data Monitor Mode
.942
On Board Diagnosis Logic ....................................942
DTC Confirmation Procedure ...............................943
Wiring Diagram .....................................................944
Diagnostic Procedure ...........................................945
Component Inspection ..........................................948
Removal and Installation ......................................948
DTC P0300 - P0308 MULTIPLE CYLINDER MIS-
FIRE, NO. 1 - 8 CYLINDER MISFIRE .....................949
On Board Diagnosis Logic ....................................949
DTC Confirmation Procedure ...............................949
Diagnostic Procedure ...........................................950
DTC P0327, P0328, P0332, P0333 KS ...................955
Component Description ........................................955
On Board Diagnosis Logic ....................................955
DTC Confirmation Procedure ...............................955
Wiring Diagram .....................................................956
Diagnostic Procedure ...........................................957
Component Inspection ..........................................959
Removal and Installation ......................................959
DTC P0335 CKP SENSOR (POS) ..........................960
Component Description ........................................960
CONSULT-II Reference Value in Data Monitor Mode
.960
On Board Diagnosis Logic ....................................960
DTC Confirmation Procedure ...............................960
Wiring Diagram .....................................................961
Diagnostic Procedure ...........................................962
Component Inspection ..........................................964
Removal and Installation ......................................965
DTC P0340 CAMSHAFT POSITION (CMP) SEN-
SOR (PHASE) .........................................................966
Component Description ........................................966
On Board Diagnosis Logic ....................................966
DTC Confirmation Procedure ...............................966
Wiring Diagram .....................................................967
Diagnostic Procedure ...........................................968
Component Inspection ..........................................970
Removal and Installation ......................................970
DTC P0420, P0430 THREE WAY CATALYST FUNC-
TION ........................................................................971
On Board Diagnosis Logic ....................................971
DTC Confirmation Procedure ...............................971
Overall Function Check ........................................972
Diagnostic Procedure ...........................................973
DTC P0441 EVAP CONTROL SYSTEM .................976
System Description ...............................................976
On Board Diagnosis Logic ....................................976
DTC Confirmation Procedure ...............................976
Overall Function Check ........................................977
Diagnostic Procedure ...........................................978DTC P0442 EVAP CONTROL SYSTEM .................981
On Board Diagnosis Logic ....................................981
DTC Confirmation Procedure ................................982
Diagnostic Procedure ............................................983
DTC P0444, P0445 EVAP CANISTER PURGE VOL-
UME CONTROL SOLENOID VALVE ......................990
Description ............................................................990
CONSULT-II Reference Value in Data Monitor Mode
.990
On Board Diagnosis Logic ....................................991
DTC Confirmation Procedure ................................991
Wiring Diagram .....................................................992
Diagnostic Procedure ............................................994
Component Inspection ..........................................995
Removal and Installation .......................................996
DTC P0447 EVAP CANISTER VENT CONTROL
VALVE ......................................................................997
Component Description ........................................997
CONSULT-II Reference Value in Data Monitor Mode
.997
On Board Diagnosis Logic ....................................997
DTC Confirmation Procedure ................................998
Wiring Diagram .....................................................999
Diagnostic Procedure ...........................................1000
Component Inspection .........................................1002
DTC P0451 EVAP CONTROL SYSTEM PRESSURE
SENSOR .................................................................1004
Component Description .......................................1004
CONSULT-II Reference Value in Data Monitor Mode
1004
On Board Diagnosis Logic ...................................1004
DTC Confirmation Procedure ...............................1005
Diagnostic Procedure ...........................................1005
Component Inspection .........................................1006
DTC P0452 EVAP CONTROL SYSTEM PRESSURE
SENSOR .................................................................1007
Component Description .......................................1007
CONSULT-II Reference Value in Data Monitor Mode
1007
On Board Diagnosis Logic ...................................1007
DTC Confirmation Procedure ...............................1008
Wiring Diagram ....................................................1009
Diagnostic Procedure ...........................................1010
Component Inspection .........................................1013
DTC P0453 EVAP CONTROL SYSTEM PRESSURE
SENSOR .................................................................1014
Component Description .......................................1014
CONSULT-II Reference Value in Data Monitor Mode
1014
On Board Diagnosis Logic ...................................1014
DTC Confirmation Procedure ...............................1015
Wiring Diagram ....................................................1016
Diagnostic Procedure ...........................................1017
Component Inspection .........................................1021
DTC P0455 EVAP CONTROL SYSTEM ................1022
On Board Diagnosis Logic ...................................1022
DTC Confirmation Procedure ...............................1023
Diagnostic Procedure ...........................................1024

EC-34
[VQ35DE]
ENGINE CONTROL SYSTEM
Revision: 2004 November 2004 FX35/FX45
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 or operation of the engine 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
The ignition timing is controlled by the ECM to maintain the best air-
fuel ratio for every running condition of the engine. The ignition tim-
ing data is stored in the ECM. This data forms the map shown.
The ECM receives information such as the injection pulse width and
camshaft position sensor signal. Computing this information, ignition
signals are transmitted to the power transistor.
e.g., N: 1,800 rpm, Tp: 1.50 msec
A °BTDC
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
SEF179U
Sensor Input Signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Engine speed*
2
Piston position
Ignition timing
controlPower 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
SEF742M

EC-90
[VQ35DE]
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
Air Air duct
55555 5EM-17
Air cleanerEM-17
Air leakage from air duct
(Mass air flow sensor — electric
throttle control actuator)
5555EM-17
Electric throttle control actuatorEM-19
Air leakage from intake manifold/
Collector/GasketEM-19,
EM-24
Cranking Battery
111111
11SC-4
Generator circuitSC-23
Starter circuit 3SC-10
Signal plate 6EM-120
PNP switch 4AT- 11 2
Engine Cylinder head
55555 55 5EM-98
Cylinder head gasket 4 3
Cylinder block
66666 66 64
EM-120
Piston
Piston ring
Connecting rod
Bearing
Crankshaft
Va l v e
mecha-
nismTiming chain
55555 55 5EM-63
CamshaftEM-82
Intake valve timing controlEM-63
Intake valve
3EM-98
Exhaust valve
Exhaust Exhaust manifold/Tube/Muffler/
Gasket
55555 55 5EM-26
, EX-
3Three way catalyst
Lubrica-
tionOil pan/Oil strainer/Oil pump/Oil
filter/Oil gallery/Oil cooler
55555 55 5EM-30
, LU-
17 , LU-10 ,
LU-14
Oil level (Low)/Filthy oilLU-7
SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA

DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6 CYLINDER MIS-
FIRE
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Revision: 2004 November 2004 FX35/FX45
DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6 CYLINDER MIS-
FIRE
PFP:00000
On Board Diagnosis LogicABS006PS
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crank-
shaft position (CKP) sensor (POS) signal to vary, ECM can determine that a misfire is occurring.
The misfire detection logic consists of the following two conditions.
1. One Trip Detection Logic (Three Way Catalyst Damage)
On the first trip that a misfire condition occurs that can damage the three way catalyst (TWC) due to over-
heating, the MIL will blink.
When a misfire condition occurs, the ECM monitors the CKP sensor signal every 200 engine revolutions
for a change.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will turn off.
If another misfire condition occurs that can damage the TWC on a second trip, the MIL will blink.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will remain on.
If another misfire condition occurs that can damage the TWC, the MIL will begin to blink again.
2. Two Trip Detection Logic (Exhaust quality deterioration)
For misfire conditions that will not damage the TWC (but will affect vehicle emissions), the MIL will only
light when the misfire is detected on a second trip. During this condition, the ECM monitors the CKP sen-
sor signal every 1,000 engine revolutions.
A misfire malfunction can be detected on any one cylinder or on multiple cylinders.
DTC Confirmation ProcedureABS0095P
CAUTION:
Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws when driv-
ing.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
Sensor Input Signal to ECM ECM function
Crankshaft position sensor (POS) Engine speed On board diagnosis of misfire
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0300
0300Multiple cylinder misfire
detectedMultiple cylinder misfire.

Improper spark plug

Insufficient compression

Incorrect fuel pressure

The injector circuit is open or shorted

Fuel injector

Intake air leak

The ignition signal circuit is open or
shorted

Lack of fuel

Signal plate

Heated oxygen sensor 1

Incorrect PCV hose connection P0301
0301No.1 cylinder misfire
detectedNo. 1 cylinder misfires.
P0302
0302No. 2 cylinder misfire
detectedNo. 2 cylinder misfires.
P0303
0303No. 3 cylinder misfire
detectedNo. 3 cylinder misfires.
P0304
0304No. 4 cylinder misfire
detectedNo. 4 cylinder misfires.
P0305
0305No. 5 cylinder misfire
detectedNo. 5 cylinder misfires.
P0306
0306No. 6 cylinder misfire
detectedNo. 6 cylinder misfires.

EC-292
[VQ35DE]
DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6 CYLINDER MIS-
FIRE
Revision: 2004 November 2004 FX35/FX45
WITH CONSULT-II
1. Turn ignition switch ON, and select “DATA MONITOR” mode
with CONSULT-II.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Restart engine and let it idle for about 15 minutes.
5. If 1st trip DTC is detected, go to EC-292, "
Diagnostic Procedure"
.
NOTE:
If 1st trip DTC is not detected during above procedure, performing
the following procedure is advised.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and drive the vehicle under the similar conditions to (1st trip) Freeze Frame Data for a certain
time. Refer to table below.
Hold the accelerator pedal as steady as possible.
The similar conditions to (1st trip) Freeze Frame Data means the vehicle operation that the following condi-
tions should be satisfied at the same time.
The time to driving varies according to the engine speed in the freeze frame data.
Refer to the following table.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Diagnostic ProcedureABS006PU
1. CHECK FOR INTAKE AIR LEAK AND PCV HOSE
1. Start engine and run it at idle speed.
2. Listen for the sound of the intake air leak.
3. Check PCV hose connection.
OK or NG
OK >> GO TO 2.
NG >> Discover air leak location and repair.
2. CHECK FOR EXHAUST SYSTEM CLOGGING
Stop engine and visually check exhaust tube, three way catalyst and muffler for dents.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace it.
PBIB0164E
Engine speed Engine speed in the freeze frame data ± 400 rpm
Vehicle speed Vehicle speed in the freeze frame data ± 10 km/h (6 MPH)
Engine coolant temperature
(T) conditionWhen the freeze frame data shows lower than 70 °C (158 °F),
T should be lower than 70 °C (158 °F).
When the freeze frame data shows higher than or equal to 70 °C (158 °F),
T should be higher than or equal to 70 °C (158 °F).
Engine speed Time
Around 1,000 rpm Approximately 10 minutes
Around 2,000 rpm Approximately 5 minutes
More than 3,000 rpm Approximately 3.5 minutes

DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6 CYLINDER MIS-
FIRE
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Revision: 2004 November 2004 FX35/FX45
3. PERFORM POWER BALANCE TEST
With CONSULT-II
1. Perform “POWER BALANCE” in “ACTIVE TEST” mode.
2. Is there any cylinder which does not produce a momentary
engine speed drop?
Without CONSULT-II
When disconnecting each injector harness connector one at a time,
is there any cylinder which does not produce a momentary engine
speed drop?
Ye s o r N o
Ye s > > G O T O 4 .
No >> GO TO 7.
4. CHECK INJECTOR
Does each injector make an operating sound at idle?
Ye s o r N o
Ye s > > G O T O 5 .
No >> Check injector(s) and circuit(s). Refer to EC-597,
"INJECTOR CIRCUIT" .
PBIB0133E
PBIB1561E
PBIB1986E

EC-294
[VQ35DE]
DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6 CYLINDER MIS-
FIRE
Revision: 2004 November 2004 FX35/FX45
5. CHECK IGNITION SPARK
1. Remove ignition coil assembly from rocker cover.
2. Remove spark plug from ignition coil assembly
3. Connect a known-good spark plug to the ignition coil.
4. Disconnect all injector harness connectors.
5. Place end of spark plug against a suitable ground and crank engine.
6. Check for spark.
OK or NG
OK >> GO TO 6.
NG >> Check ignition coil, power transistor and their circuits.
Refer to EC-585, "
IGNITION SIGNAL" .
6. CHECK SPARK PLUGS
Remove the spark plugs and check for fouling, etc.
OK or NG
OK >> GO TO 7.
NG >> Repair or replace spark plug(s) with standard type
one(s). For spark plug type, refer to, MA-14, "
ENGINE
MAINTENANCE (VQ35DE ENGINE)" .
7. CHECK COMPRESSION PRESSURE
Check compression pressure. Refer to EM-98, "
CHECKING COMPRESSION PRESSURE" .
OK or NG
OK >> GO TO 8.
NG >> Check pistons, piston rings, valves, valve seats and cylinder head gaskets.
8. CHECK FUEL PRESSURE
1. Install all removed parts.
2. Release fuel pressure to zero. Refer to EC-51, "
FUEL PRESSURE RELEASE" .
3. Install fuel pressure gauge and check fuel pressure. Refer to EC-52, "
FUEL PRESSURE CHECK" .
OK or NG
OK >> GO TO 10.
NG >> GO TO 9.
SEF575Q
SEF156I
Standard:
1,275 kPa (13.0 kg/cm2 , 185 psi)/300 rpm
Minimum:
981 kPa (10.0 kg/cm
2 , 142 psi)/300 rpm
Difference between each
cylinder:98 kPa (1.0 kg/cm
2 , 14 psi)/300 rpm
At idle: Approx. 350 kPa (3.57 kg/cm
2 , 51 psi)