Camshaft INFINITI FX35 2006 Workshop Manual

EC-694
[VK45DE]
ENGINE CONTROL SYSTEM
Revision: 2006 December 2006 FX35/FX45

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)NBS004JQ
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM through CAN communication line.
SYSTEM DESCRIPTION
If the engine speed is above 1,400 rpm under no load (for example, the selector lever position is neutral and
engine speed is over 1,400 rpm) fuel will be cut off after some time. The exact time when the fuel is cut off var-
ies based on engine speed.
Fuel cut will be operated until the engine speed reaches 1,000 rpm, then fuel cut will be cancelled.
NOTE:
This function is different from deceleration control listed under Multiport Fuel Injection (MFI) System, EC-691
.
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*

AIR CONDITIONING CUT CONTROL EC-695
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Revision: 2006 December 2006 FX35/FX45
AIR CONDITIONING CUT CONTROLPFP:23710
Input/Output Signal ChartNBS00415
*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 DescriptionNBS00416
This system improves engine operation when the air conditioner is used.
Under the following conditions, the air conditioner is turned off.

When the accelerator pedal is fully depressed.

When cranking the engine.

At high engine speeds.

When the engine coolant temperature becomes excessively high.

When operating power steering during low engine speed or low vehicle speed.

When engine speed is excessively low.

When refrigerant pressure is excessively low or high.
Sensor Input Signal to ECM ECM function Actuator
Air conditioner switch Air conditioner ON signal*
1
Air conditioner
cut control Air conditioner relay
Accelerator pedal position sensor Accelerator pedal position
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE) Engine speed*
2
Engine coolant temperature sensor Engine coolant temperature
Battery Battery voltage*
2
Refrigerant pressure sensor Refrigerant pressure
Power steering pressure sensor Power steering operation
Wheel sensor Vehicle speed*
1

BASIC SERVICE PROCEDURE EC-739
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Revision: 2006 December 2006 FX35/FX45
6. PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-744, "
Idle Air Volume Learning" .
Is Idle Air Volume Learning carried out successfully?
Ye s o r N o
Ye s > > G O T O 7 .
No >> 1. Follow the instruction of Idle Air Volume Learning.
2. GO TO 4.
7. 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-742
.
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed. Refer to EC-742
.
OK or NG
OK >> GO TO 10.
NG >> GO TO 8.
8. DETECT MALFUNCTIONING PART
Check the Following.

Check camshaft position sensor (PHASE) and circuit. Refer to EC-1037 .

Check crankshaft position sensor (POS) and circuit. Refer to EC-1030 .
OK or NG
OK >> GO TO 9.
NG >> 1. Repair or replace.
2. GO TO 4.
9. CHECK ECM FUNCTION
1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but this is a rare case.)
2. Perform initialization of IVIS (NATS) system and registration of all IVIS (NATS) ignition key IDs. Refer to BL-207, "
ECM Re-Communicating Function" .
>> GO TO 4.
650
± 50 rpm (in P or N position)
650 ± 50 rpm (in P or N position)
SEF174Y

BASIC SERVICE PROCEDURE EC-741
[VK45DE]
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Revision: 2006 December 2006 FX35/FX45
15. CHECK IGNITION TIMING AGAIN
1. Run engine at idle.
2. Check ignition timing with a timing light. Refer to EC-742
.
OK or NG
OK >> GO TO 19.
NG >> GO TO 16.
16. CHECK TIMING CHAIN INSTALLATION
Check timing chain installation. Refer to EM-203, "
TIMING CHAIN" .
OK or NG
OK >> GO TO 17.
NG >> 1. Repair the timing chain installation.
2. GO TO 4.
17. DETECT MALFUNCTIONING PART
Check the following.

Check camshaft position sensor (PHASE) and circuit. Refer to EC-1037 .

Check crankshaft position sensor (POS) and circuit. Refer to EC-1030 .
OK or NG
OK >> GO TO 18.
NG >> 1. Repair or replace.
2. GO TO 4.
18. CHECK ECM FUNCTION
1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but this is a rare case.)
2. Perform initialization of IVIS (NATS) system and registration of all IVIS (NATS) ignition key IDs. Refer to BL-207, "
ECM Re-Communicating Function" .
>> GO TO 4.
19. INSPECTION END
Did you replace ECM, referring this Basic Inspection procedure?
Ye s o r N o
Ye s > > 1 . P e r f o r m EC-743, "VIN Registration" .
2. INSPECTION END
No >> INSPECTION END
12
± 5 ° BTDC (in P or N position)
PBIB1487E

EC-754
[VK45DE]
TROUBLE DIAGNOSIS
Revision: 2006 December 2006 FX35/FX45
DTC Inspection Priority ChartNBS004JW
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
NOTE:

If DTC U1000 or U1001 is displayed with other DTC, first perform the trouble diagnosis for DTC
U1000, U1001. Refer to EC-819, "
DTC U1000, U1001 CAN COMMUNICATION LINE" .

If DTC U1010 is displayed with other DTC, first perform the trouble diagnosis for DTC U1010. Refer
to EC-822, "
DTC U1010 CAN COMMUNICATION" .
Priority Detected items (DTC)
1

U1000 U1001 CAN communication line

U1010 CAN communication

P0101 P0102 P0103 Mass air flow sensor

P0112 P0113 P0127 Intake air temperature sensor

P0117 P0118 P0125 Engine coolant temperature sensor

P0122 P0123 P0222 P0223 P1225 P1226 P2135 Throttle position sensor

P0128 Thermostat function

P0181 P0182 P0183 Fuel tank temperature sensor

P0327 P0328 P0332 P0333 Knock sensor

P0335 Crankshaft position sensor (POS)

P0340 Camshaft position sensor (PHASE)

P0460 P0461 P0462 P0463 Fuel level sensor

P0500 Vehicle speed sensor

P0605 ECM

P0643 Sensor power supply

P0700 TCM

P0705 Park/Neutral position (PNP) switch

P0850 Park/Neutral position (PNP) switch

P1610 - P1615 NATS

P2122 P2123 P2127 P2128 P2138 Accelerator pedal position sensor

TROUBLE DIAGNOSIS EC-757
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Revision: 2006 December 2006 FX35/FX45
Symptom Matrix ChartNBS00420
SYSTEM — BASIC ENGINE CONTROL SYSTEM
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
Fuel Fuel pump circuit 11232 22 3 2 EC-1314
Fuel pressure regulator system334444444 4 EC-746
Fuel injector circuit 11232 22 2 EM-194
Evaporative emission system334444444 4 EC-699
Air Positive crankcase ventilation sys-
tem 33 4444444 41
EC-711
Incorrect idle speed adjustment 1 1 1 1 1 EC-737
Electric throttle control actuator 112332222 2 2 EC-1240,
EC-1252
IgnitionIncorrect ignition timing adjustment33111 11 1 EC-737
Ignition circuit 11222 22 2EC-1328
Main power supply and ground circuit22333 33 23 EC-812
Mass air flow sensor circuit
1
12 2
222 2 EC-858,
EC-867
,
Engine coolant temperature sensor circuit
3 33
EC-879
,
EC-892
A/F sensor 1 circuit EC-900
,
EC-910
,
EC-919
,
EC-928
,
EC-1283
Throttle position sensor circuit
22 EC-885
,
EC-1008
,
EC-1183
,
EC-1185
,
EC-1268
Accelerator pedal position sensor circuit 3 2 1 EC-1149
,
EC-1254
,
EC-1261
,
EC-1275
Knock sensor circuit 2 3 EC-1025
Crankshaft position sensor (POS) circuit 2 2EC-1030
Camshaft position sensor (PHASE) circuit 3 2EC-1037
Vehicle speed signal circuit 2 3 3 3EC-1131
Power steering pressure sensor circuit 2 3 3EC-1137

TROUBLE DIAGNOSIS EC-759
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Revision: 2006 December 2006 FX35/FX45
Air Air duct 55555 5 EM-177
Air cleaner
EM-177
Air leakage from air duct
(Mass air flow sensor — electric
throttle control actuator) 5555 EM-177
Electric throttle control actuator
EM-179
Air leakage from intake manifold/
Collector/Gasket EM-179
Cranking Battery
111111
1 1
SC-4
Generator circuit
SC-20
Starter circuit 3SC-8
Signal plate 6EM-248
PNP switch 4AT- 11 2
Engine Cylinder head
55555 55 5 EM-232
Cylinder head gasket 4 3
Cylinder block
66666 66 6 4
EM-248
Piston
Piston ring
Connecting rod
Bearing
Crankshaft
Va l v e
mecha-
nism Timing chain
55555 55 5 EM-203
Camshaft
EM-215
Intake valve timing controlEM-203
Intake valve
3 EM-203
Exhaust valve
Exhaust Exhaust manifold/Tube/Muffler/ Gasket 55555 55 5 EM-183
,
EX-3
Three way catalyst
Lubrica-
tion Oil pan/Oil strainer/Oil pump/Oil
filter/Oil gallery/Oil cooler 55555 55 5 EM-187
,
LU-31
, LU-
28 , LU-29
Oil level (Low)/Filthy oil LU-25
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

TROUBLE DIAGNOSIS EC-761
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Revision: 2006 December 2006 FX35/FX45
Engine Control Component Parts LocationNBS00421
1. IPDM E/R 2. ICC brake hold relay (ICC models only) 3. Refrigerant pressure sensor
4. Intake valve timing control position sensor (bank 2) 5. Intake valve timing control solenoid
valve (bank 2) 6. Electric throttle control actuator
7. Cooling fan motor 8. Intake valve timing control solenoid valve (bank 1) 9. Intake valve timing control position
sensor (bank 1)
10. Camshaft position sensor (PHASE) 11. Mass air flow sensor (with intake air temperature sensor) 12. Ignition coil (with power transistor)
and spark plug (bank 1)
13. Vacuum tank 14. VIAS control solenoid valve 15. Engine coolant temperature sensor
16. Fuel injector (bank 1) 17. Power valve actuator 18. Knock sensor (bank 1)
19. Knock sensor (bank 2) 20. Fuel injector (bank 2) 21. EVAP canister purge volume control solenoid valve
22. EVAP service port 23. Ignition coil (with power transistor) and spark plug (bank 2)
PBIB3224E

EC-762
[VK45DE]
TROUBLE DIAGNOSIS
Revision: 2006 December 2006 FX35/FX45
: Vehicle front
1. Mass air flow sensor (with intake air temperature sensor) 2. Camshaft position sensor (PHASE) 3. Engine coolant temperature sensor
4. Engine coolant temperature sensor sub-harness connector 5. Knock sensor (bank 1) 6. Knock sensor (bank 2)
7. Refrigerant pressure sensor
PBIB3225E

TROUBLE DIAGNOSIS EC-773
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Revision: 2006 December 2006 FX35/FX4512 R/G Power steering pressure
sensor [Engine is running]
Steering wheel: Being turned
0.5 - 4.5V
[Engine is running]

Steering wheel: Not being turned 0.4 - 0.8V
13 Y Crankshaft position sensor
(POS) [Engine is running]

Warm-up condition

Idle speed
NOTE:
The pulse cycle changes depending on rpm
at idle 1.0 - 2.0V
[Engine is running]

Engine speed: 2,000 rpm 1.0 - 2.0V
14 W Camshaft position sensor
(PHASE) [Engine is running]

Warm-up condition

Idle speed
NOTE:
The pulse cycle changes depending on rpm
at idle 1.0 - 4.0V
[Engine is running]

Engine speed: 2,000 rpm 1.0 - 4.0V
15 W Knock sensor (bank 1) [Engine is running]

Idle speed Approximately 2.5V
16 R
A/F sensor 1 (bank 1) [Engine is running]

Warm-up condition

Idle speed Approximately 3.1V
35 G Approximately 2.6V
56 B Approximately 2.3V
75 OR Approximately 2.3V
TER-
MINAL NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
PBIB1041E
PBIB1042E
PBIB1039E
PBIB1040E