coolant temperature INFINITI M35 2006 Factory Service Manual

DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)
EC-1251
[VK45DE]
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Revision: 2006 January2006 M35/M45
DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)PFP:17001
DescriptionNBS005KY
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
This system controls the fuel pump operation. The amount of fuel flow delivered from the fuel pump is altered
between two flow rates by the FPCM operation. The FPCM determines the voltage supplied to the fuel pump
(and therefore fuel flow) according to the following conditions.
COMPONENT DESCRIPTION
The FPCM adjusts the voltage supplied to the fuel pump to control
the amount of fuel flow. When the FPCM increases the voltage sup-
plied to the fuel pump, the fuel flow is increased. When the FPCM
decreases the voltage, the fuel flow is decreased.
CONSULT-II Reference Value in Data Monitor ModeNBS005KZ
Specification data are reference values.
On Board Diagnosis LogicNBS005L0
Sensor Input Signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
Fuel pump controlFuel pump control module
(FPCM) Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Battery Battery voltage*
Conditions Amount of fuel flow Supplied voltage
Engine cranking
Engine coolant temperature is below 10C (50F).
Engine is running under heavy load and high speed conditionshighBattery voltage
(11 - 14V)
Except the above low Approximately 8V
SEF387X
MONITOR ITEM CONDITION SPECIFICATION
FPCM
Engine: Cranking HI
Engine: Idle
Engine coolant temperature: More than 10C (50F)LOW
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1220
1220Fuel pump control module
(FPCM)An improper voltage signal from the FPCM, which
is supplied to a point between the fuel pump and
the dropping resistor, is detected by ECM.
Harness or connectors
(FPCM circuit is shorted.)
Dropping resistor
FPCM

EC-1398
[VK45DE]
VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)
Revision: 2006 January2006 M35/M45
VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)PFP:14956
DescriptionNBS005PK
SYSTEM DESCRIPTION
*: The ECM determines the start signal status by the signals of engine speed and battery voltage.
When the engine is running at low or medium speed, the power valve is fully closed. Under this condition, the
effective suction port length is equivalent to the total length of the intake manifold collector's suction port
including the intake valve. This long suction port provides increased air intake which results in improved suc-
tion efficiency and higher torque generation.
The surge tank and one-way valve are provided. When engine is running at high speed, the ECM sends the
signal to the VIAS control solenoid valve. This signal introduces the intake manifold vacuum into the power
valve actuator and therefore opens the power valve to two suction passages together in the collector.
Under this condition, the effective port length is equivalent to the length of the suction port provided indepen-
dently for each cylinder. This shortened port length results in enhanced engine output with reduced suction
resistance under high speeds.
The power valve is always open regardless of the engine speed when gear position is in N or P.
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
VIAS control VIAS control solenoid valve Mass air flow sensor Amount of intake air
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Battery Battery voltage*
Engine coolant temperature sensor Engine coolant temperature
PBIB1876E

SERVICE DATA AND SPECIFICATIONS (SDS)
EC-1461
[VK45DE]
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Revision: 2006 January2006 M35/M45
SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
Fuel PressureNBS005QT
Idle Speed and Ignition TimingNBS005QU
*: Under the following conditions:
Air conditioner switch: OFF
Electric load: OFF (Lights, heater fan & rear window defogger)
Steering wheel: Kept in straight-ahead position
Calculated Load ValueNBS005QV
Mass Air Flow SensorNBS005QW
*: Engine is warmed up to normal operating temperature and running under no load.
Intake Air Temperature SensorNBS005QX
Engine Coolant Temperature SensorNBS005QY
Fuel Tank Temperature SensorNBS005QZ
Crankshaft Position Sensor (POS)NBS005R0
Refer to EC-1105, "Component Inspection" .
Camshaft Position Sensor (PHASE)NBS005R1
Refer to EC-1112, "Component Inspection" .
A/F Sensor 1 HeaterNBS005R2
Fuel pressure at idling kPa (kg/cm2 , psi)Approximately 350 (3.57, 51)
Target idle speed No load* (in P or N position) 65050 rpm
Air conditioner: ON In P or N position 650 rpm or more
Ignition timing In P or N position 12
5 BTDC
Condition Calculated load value% (Using CONSULT-II or GST)
At idle14 - 33
At 2,500 rpm12 - 25
Supply voltageBattery voltage (11 - 14V)
Output voltage at idle0.9 - 1.2V*
Mass air flow (Using CONSULT-II or GST)2.0 - 6.0 gꞏm/sec at idle*
7.0 - 20.0 gꞏm/sec at 2,500 rpm*
Temperature C (F) Resistance k
25 (77)1.800 - 2.200
Temperature C (F) Resistance k
20 (68)2.1 - 2.9
50 (122)0.68 - 1.00
90 (194)0.236 - 0.260
Temperature C (F) Resistance k
20 (68)2.3 - 2.7
50 (122)0.79 - 0.90
Resistance [at 25C (77F)] 2.3 - 4.3

EM-234
[VK45DE]
CYLINDER HEAD
Revision: 2006 January2006 M35/M45
If the engine speed is out of specified range, check battery liquid for proper gravity. Check engine
speed again with normal battery gravity.
If compression pressure is below minimum value, check valve clearances and parts associated with
combustion chamber (valve, valve seat, piston, piston ring, cylinder bore, cylinder head, cylinder head
gasket). After the checking, measure compression pressure again.
If some cylinders have low compression pressure, pour small amount of engine oil into the spark plug
hole of the cylinder to re-check it for compression.
–If the added engine oil improves the compression, piston rings may be worn out or damaged. Check the
piston rings and replace if necessary.
–If the compression pressure remains at low level despite the addition of engine oil, valves may be mal-
functioning. Check valves for damage. Replace valve or valve seat accordingly.
If two adjacent cylinders have respectively low compression pressure and their compression remains
low even after the addition of engine oil, cylinder head gaskets are leaking. In such a case, replace cyl-
inder head gaskets.
8. After inspection is completed, install removed parts in the reverse order of removal.
9. Start engine, and make sure that engine runs smoothly.
10. Perform trouble diagnosis. If DTC appears, erase it. Refer to EC-811, "
TROUBLE DIAGNOSIS" .
ComponentsNBS004PG
Removal and InstallationNBS004PH
REMOVAL
1. Remove engine assembly from vehicle. Refer to EM-244, "ENGINE ASSEMBLY" .
2. Remove exhaust manifold. Refer to EM-183, "
EXHAUST MANIFOLD AND THREE WAY CATALYST" .
3. Remove camshaft. Refer to EM-215, "
CAMSHAFT" .
1. Engine coolant temperature sensor 2. Washer 3. Cylinder head gasket (left bank)
4. Harness bracket 5. Cylinder head (right bank) 6. Cylinder head bolt
7. Cylinder head gasket (right bank) 8. Cylinder head bolt 9. Cylinder head (left bank)
PBIC2756E

TERMINOLOGY
GI-53
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Revision: 2006 January2006 M35/M45
TERMINOLOGYPFP:00011
SAE J1930 Terminology List NAS00088
All emission related terms used in this publication in accordance with SAE J1930 are listed. Accordingly, new
terms, new acronyms/abbreviations and old terms are listed in the following chart.
NEW TERMNEW ACRONYM /
ABBREVIATIONOLD TERM
Air cleaner ACL Air cleaner
Barometric pressure BARO ***
Barometric pressure sensor-BCDD BAROS-BCDD BCDD
Camshaft position CMP ***
Camshaft position sensor CMPS Crank angle sensor
Canister *** Canister
Carburetor CARB Carburetor
Charge air cooler CAC Intercooler
Closed loop CL Closed loop
Closed throttle position switch CTP switch Idle switch
Clutch pedal position switch CPP switch Clutch switch
Continuous fuel injection system CFI system ***
Continuous trap oxidizer system CTOX system ***
Crankshaft position CKP ***
Crankshaft position sensor CKPS ***
Data link connector DLC ***
Data link connector for CONSULT-II DLC for CONSULT-II Diagnostic connector for CONSULT-II
Diagnostic test mode DTM Diagnostic mode
Diagnostic test mode selector DTM selector Diagnostic mode selector
Diagnostic test mode I DTM I Mode I
Diagnostic test mode II DTM II Mode II
Diagnostic trouble code DTC Malfunction code
Direct fuel injection system DFI system ***
Distributor ignition system DI system Ignition timing control
Early fuel evaporation-mixture heater EFE-mixture heater Mixture heater
Early fuel evaporation system EFE system Mixture heater control
Electrically erasable programmable read
only memoryEEPROM ***
Electronic ignition system EI system Ignition timing control
Engine control EC ***
Engine control module ECM ECCS control unit
Engine coolant temperature ECT Engine temperature
Engine coolant temperature sensor ECTS Engine temperature sensor
Engine modification EM ***
Engine speed RPM Engine speed
Erasable programmable read only memory EPROM ***
Evaporative emission canister EVAP canister Canister
Evaporative emission system EVAP system Canister control solenoid valve
Exhaust gas recirculation valve EGR valve EGR valve

IDX-4
ALPHABETICAL INDEX
Electronic ignition (EI) system ............. EC-33, EC-743
Engine control module (ECM) .......... EC-496, EC-1215
Engine control system diagram ........... EC-30, EC-740
Engine coolant temperature sensor (ECTS) ... EC-226,
EC-238
, EC-948, EC-961
Engine coolant(VK45DE) .................................. CO-40
Engine coolant(VQ35DE) ................................. CO-11
Engine oil filter replacement ............................. MA-26
Engine oil filter replacement(VQ35DE) ............. MA-19
Engine oil precautions .......................................... GI-8
Engine oil replacement(VQ35DE) ..................... MA-18
Engine oil(VK45DE) ........................................... LU-26
Engine oil(VQ35DE) ............................................ LU-7
Engine removal(VK45DE) ............................... EM-244
Engine removal(VQ35DE) .............................. EM-113
Engine room cover ............................................ EM-14
Engine room cover(VK45DE) ......................... EM-173
ETC1 - Wiring diagram .................... EC-614, EC-1345
ETC2 - Wiring diagram .................... EC-609, EC-1340
ETC3 - Wiring diagram .................... EC-620, EC-1352
EVAP canister ...................................... EC-42, EC-752
EVAP canister purge volume control solenoid valve ....
EC-412
, EC-420, EC-1132, EC-1140
EVAP canister vent control valve ...... EC-427, EC-434,
EC-1147
, EC-1154
EVAP control system (small leak) diagnosis .. EC-403,
EC-466
, EC-1124, EC-1185
EVAP control system pressure sensor ........... EC-440,
EC-443
, EC-450, EC-1160, EC-1163, EC-1170
EVAP control system purge flow monitoring diagnosis
EC-398
, EC-1119
EVAP vapor lines inspection ................. MA-21, MA-28
Evaporative emission (EVAP) system . EC-39, EC-749
Evaporator ..................................................... ATC-168
Exhaust manifold(VK45DE) ............................ EM-183
Exhaust system ................................................... EX-3
Exhaust system inspection ..................... EX-3, MA-29
Expansion valve ............................................. ATC-169
F
F/FOG - Wiring diagram ................................... LT-197
F/PUMP - Wiring diagram ................ EC-686, EC-1428
Final drive pre-inspection .................. FFD-16, RFD-19
Final drive removal and installation .. FFD-13, RFD-16
Floor trim ............................................................. EI-50
Flow charts ......................................................... GI-28
Fluid temperature sensor (A/T) ........................ AT-135
Fluorescent leak detector .............................. ATC-170
FPCM - Wiring diagram ................... EC-527, EC-1253
Freeze frame data ............................... EC-59, EC-770
Front brake solenoid valve ................. AT-151, AT-153
Front bumper ...................................................... EI-11
Front combination lamp removal and installation LT-76
Front door ............................. BL-190, BL-196, GW-63
Front passenger air bag .................................. SRS-42
Front seat belt .................................................... SB-30
Front seat belt pre-tensioner ..... SB-2, SRS-3, SRS-47
Front washer ...................................................... WW-4
Front wiper ......................................................... WW-4
FTS - Wiring diagram ....................................... AT-136
FTTS - Wiring diagram .... EC-345, EC-350, EC-1068,
EC-1073
Fuel cut control (at no load high engine speed) EC-34,
EC-744
Fuel filter replacement ......................................... FL-4
Fuel gauge ............................................................ DI-5
Fuel injection system (Bank 1) ......... EC-321, EC-332,
EC-1044
, EC-1055
Fuel injection system (Bank 2) ......... EC-321, EC-332,
EC-1044
, EC-1055
Fuel injector ................................................... EC-1420
Fuel injector and fuel tube(VK45DE) .............. EM-193
Fuel injector and fuel tube(VQ35DE) ................ EM-45
Fuel level sensor EC-475, EC-477, EC-479, EC-1194,
EC-1196
, EC-1198
Fuel line inspection .................................. FL-3, MA-25
Fuel line inspection(VQ35DE) .......................... MA-18
Fuel precautions ................................................... GI-6
Fuel pressure check ........................... EC-98, EC-809
Fuel pressure release ......................... EC-98, EC-809
Fuel pump ....................................... EC-685, EC-1427
Fuel pump and gauge .......................................... FL-4
Fuel pump control module .............. EC-525, EC-1251
Fuel pump dropping resistor ........... EC-525, EC-1251
Fuel system ......................................................... FL-3
Fuel tank ............................................................ FL-10
Fuel tank temperature sensor .......... EC-343, EC-349,
EC-1066
, EC-1072
Fuel tank vacuum relief valve ............. EC-42, EC-752
FUELB1 - Wiring diagram EC-323, EC-334, EC-1046,
EC-1057
FUELB2 - Wiring diagram EC-325, EC-336, EC-1048,
EC-1059
Fuse .................................................................. PG-17
Fuse and fusible link box ................................ PG-112
Fusible link ........................................................ PG-17
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Gauges ................................................................. DI-5
Generator ........................................................... SC-23
Generator - See Alternator ................................ SC-23
Glass ........................ GW-11, GW-61, GW-63, GW-67
Grille - See Exterior ............................................ EI-16
Ground distribution ........................................... PG-46
H
H/LAMP - Wiring diagram ....................... LT-13
, LT-48
Harness connector .......................................... PG-102
Harness layout .................................................. PG-63
Hazard warning lamp ....................................... LT-211
Headlamp removal and installation .................... LT-76
Headlining - See Roof trim .................................. EI-52
Heated oxygen sensor 2 (bank 1) .... EC-286, EC-297,
EC-310
, EC-1009, EC-1020, EC-1033
Heated oxygen sensor 2 (bank 2) .... EC-286, EC-297,

LAN-40
[CAN]
CAN COMMUNICATION
Revision: 2006 January2006 M35/M45
INPUT/OUTPUT SIGNAL CHART
2WD models
T: Transmit R: Receive
Signals
ECM
TCM
AFS control unit*1
BCM
LDW camera unit*2
Low tire pressure warning control unit
Steering angle sensor
Intelligent Key unit
Unified meter and A/C amp.
AV (NAVI) control unit
RAS control unit*3
Pre-crash seat belt control unit*4
Driver seat control unit
ABS actuator and electric unit (control unit)
ICC sensor integrated unit*5
IPDM E/R
A/C compressor request signal TR
Accelerator pedal position signal T R R R
ASCD CRUISE lamp signal T R
ASCD OD cancel request signal T R
ASCD operation signal T R
ASCD SET lamp signal T R
Battery voltage signal T R
Closed throttle position signal T R R
Cooling fan speed request signal TR
Engine coolant temperature signal T R
Engine speed signal T R R R R R R
Engine status signal T R R R
Fuel consumption monitor signal T R R
ICC brake switch signal T R
ICC prohibition signal T R
ICC steering switch signal T R
Malfunctioning indicator lamp signal T R
Power generation command value signal TR
Wide open throttle position signal T R
A/T CHECK indicator lamp signal T R
A/T position indicator signal T R R R R
A/T self-diagnosis signal R T
Current gear position signal T R R
Manual mode indicator signal T R R
N range signal T R R
Output shaft revolution signal R T R R
P range signal T R R R R
R range signal T R R R
Turbine revolution signal R T R
AFS OFF indicator signal T R
A/C switch signal R T
ACC signal T R R

LAN-44
[CAN]
CAN COMMUNICATION
Revision: 2006 January2006 M35/M45
AW D m o del s
T: Transmit R: Receive
Signals
ECM
TCM
AWD control unit
AFS control unit*1
BCM
LDW camera unit*2
Low tire pressure warning control unit
Steering angle sensor
Intelligent Key unit
Unified meter and A/C amp.
AV (NAVI) control unit
Pre-crash seat belt control unit*3
Driver seat control unit
ABS actuator and electric unit (control unit)
ICC sensor integrated unit*4
IPDM E/R
A/C compressor request signal TR
Accelerator pedal position signal T R R R R
ASCD CRUISE lamp signal T R
ASCD OD cancel request signal T R
ASCD operation signal T R
ASCD SET lamp signal T R
Battery voltage signal T R
Closed throttle position signal T R R
Cooling fan speed request signal TR
Engine coolant temperature signal T R
Engine speed signal T R R R R R R
Engine status signal T R R R
Fuel consumption monitor signal T R R
ICC brake switch signal T R
ICC prohibition signal T R
ICC steering switch signal T R
Malfunctioning indicator lamp signal T R
Power generation command value signal TR
Wide open throttle position signal T R
A/T CHECK indicator lamp signal T R
A/T position indicator signal T R R R R
A/T self-diagnosis signal R T
Current gear position signal T R R
Manual mode indicator signal T R R
N range signal T R R
Output shaft revolution signal R T R R
P range signal T R R R R
R range signal T R R R
Turbine revolution signal R T R
AWD signal T R
AWD warning lamp signal T R
AFS OFF indicator signal T R
A/C switch signal R T

MA-6
GENERAL MAINTENANCE
Revision: 2006 January2006 M35/M45
UNDER THE HOOD AND VEHICLE
The maintenance items listed here should be checked periodically (e.g. each time you check the engine oil or refuel). Parking brakeCheck that the pedal has the proper travel and make sure that the vehicle is
held securely on a fairly steep hill when only the parking brake is applied.PB-2
Automatic transmis-
sion "Park" mecha-
nismCheck that the lock release button on the selector lever operates properly and
smoothly. On a fairly steep hill check that the vehicle is held securely with the
selector lever in the P (Park) position without applying any brakes.— ItemReference page
ItemReference page
Windshield washer
fluidCheck that there is adequate fluid in the tank. —
Engine coolant levelCheck the coolant level when the engine is cold.MA-15
, MA-22
Radiator and hosesCheck the front of the radiator and clean off any dirt, insects, leaves, etc., that
may have accumulated. Make sure the hoses have no cracks, deformation,
deterioration or loose connections.—
Brake fluid levelMake sure that the brake fluid level is between the “MAX” and “MIN” lines on
the reservoir.MA-35

BatteryCheck the fluid level in each cell. It should be between the “MAX” and “MIN”
lines. Vehicles operated in high temperatures or under severe conditions
require frequent checks of the battery fluid level.SC-5, "
CHECKING
ELECTROLYTE LEVEL"
Engine drive beltsMake sure that no belt is frayed, worn, cracked or oily.MA-14, MA-22
Engine oil levelCheck the level on the oil level gauge after parking the vehicle on a level spot
and turning off the engine.MA-18, MA-25
Power steering fluid
level and linesCheck the level on the dipstick with the engine off. Check the lines for improper
attachment, leaks, cracks, etc.MA-37
Exhaust systemMake sure there are no loose supports, cracks or holes. If the sound of the
exhaust seems unusual or there is a smell of exhaust fumes, immediately
locate the trouble and correct it.MA-29
UnderbodyThe underbody is frequently exposed to corrosive substances such as those
used on icy roads or to control dust. It is very important to remove these sub-
stances, otherwise rust will form on the floor pan, frame, fuel lines and around
the exhaust system. At the end of winter, the underbody should be thoroughly
flushed with plain water, being careful to clean those areas where mud and dirt
can easily accumulate.—
Fluid leaksCheck under the vehicle for fuel, oil, water or other fluid leaks after the vehicle
has been parked for a while. Water dripping from the air conditioner after use is
normal. If you should notice any leaks or gasoline fumes are evident, check for
the cause and correct it immediately.—

MA-12
RECOMMENDED FLUIDS AND LUBRICANTS
Revision: 2006 January2006 M35/M45
RECOMMENDED FLUIDS AND LUBRICANTSPFP:00000
Fluids and Lubricants NLS0007E
*1: For further details, see “SAE Viscosity Number”.
*2: Using automatic transmission fluid other than Genuine NISSAN Matic J ATF will cause deterioration in driveability and
automatic transmission durability, and may damage the automatic transmission, which is not covered by the INFINITI new
vehicle limited warranty.
*3: For hot climates, viscosity SAE 90 is suitable for ambient temperatures above 0
C (32F).
*4: DEXRONTM III/ MERCONTM or equivalent may also be used. Outside the continental United States and Alaska contact an INFINITI
dealer for more information regarding suitable fluids, including recommended brand(s) of DEXRON TM III/ MERCONTM automatic trans-
mission fluid.
*5: For Canada, NISSAN Automatic Transmission Fluid (ATF), DEXRON
TM III/ MERCONTM , or equivalent ATF may also be used.
*6: Available in mainland U.S.A. through your INFINITI dealer.Capacity (Approximate)
Recommended Fluids/Lubricants
US measureImp mea-
sureLiter
Engine oil
Drain and
refillWith oil fil-
ter changeVK45DE 5-3/4 qt 4-7/8 qt 5.5
For VK45DE engine
Genuine NISSAN engine oil
API Certification Mark*1
API grade SJ or SL, Energy Conserving*1
ILSAC grade GF-II & GF-III*1
For VQ35DE engine
Genuine NISSAN engine oil
API Certification Mark*1
API grade SG/SH, Energy Conserving I & II
or API grade SJ or SL, Energy Conserving *1
ILSAC grade GF-I, GF-II & GF-III *1 VQ35DE 5 qt 4 - 1/8 qt 4.7
Without oil
filter
changeVK45DE 5-1/8 qt 4-1/4 qt 4.9
VQ35DE 4-5/8 qt 3-7/8 qt 4.4
Dry engine (Overhaul)VK45DE 7-1/8 qt 5-7/8 qt 6.7
VQ35DE 5-3/4 qt 4-3/4 qt 5.4
Cooling
systemWith res-
ervoir tankVK45DE 11 qt 9-1/8 qt 10.4
Genuine NISSAN Long Life Antifreeze/ Coolant
or equivalent VQ35DE 9-3/8 qt 7-7/8 qt 8.9
Reservoir
tankVK45DE 5/8 qt 1/2 qt 0.6
VQ35DE 5/8 qt 1/2 qt 0.6
Automatic transmission fluid 10-7/8 qt 9-1/8 qt 10.3 Genuine NISSAN Matic J ATF *2
Differential gear oilFront 1-3/8 pt 1-1/8 pt 0.65
API GL-5, Viscosity SAE 80W-90 *3
Rear 3 pt 2-1/2 pt 1.40
Transfer fluid 2-5/8 pt 2-1/4 pt 1.25Genuine NISSAN Matic D ATF (Continental U.S.
and Alaska) or Canada NISSAN Automatic
Transmission Fluid*4
Power steering fluid (PSF) 1-1/8 qt 7/8 qt 1.0 Genuine NISSAN PSF or equivalent*5
Brake fluid — — —Genuine NISSAN Super Heavy Duty Brake
Fluid*6 or equivalent
DOT 3 (US FMVSS No. 116)
Multi-purpose grease — — — NLGI No. 2 (Lithium soap base)
Windshield washer fluid — — —Genuine NISSAN Windshield Washer Concen-
trate Cleaner & Antifreeze or equivalent
Fuel recommendationVK45DE — — —Refer to GI-6, "
Precautions for Fuel (Unleaded
Premium Gasoline Required)" .
VQ35DE — — —Refer to GI-6, "
Precautions for Fuel (Unleaded
Premium Gasoline Recommended)" .