length INFINITI QX56 2007 Factory User Guide

ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-65
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displayed, they may be either DTCs or 1st trip DTCs. DTC No. is same as that of 1st trip DTC. These uniden-
tified codes can be identified by using the CONSULT-II or GST. A DTC will be used as an example for how to
read a code.
A particular trouble code can be identified by the number of four-digit numeral flashes. The “zero” is indicated
by the number of ten flashes. The “A” is indicated by the number of eleven flash.The length of time the
1,000th-digit numeral flashes on and off is 1.2 seconds consisting of an ON (0.6-second) - OFF (0.6-second)
cycle.
The 100th-digit numeral and lower digit numerals consist of a 0.3-second ON and 0.3-second OFF cycle.
A change from one digit numeral to another occurs at an interval of 1.0-second OFF. In other words, the later
numeral appears on the display 1.3 seconds after the former numeral has disappeared.
A change from one trouble code to another occurs at an interval of 1.8-second OFF.
In this way, all the detected malfunctions are classified by their DTC numbers. The DTC 0000 refers to no mal-
function. (See EC-9
)
How to Erase Diagnostic Test Mode II (Self-diagnostic Results)
The DTC can be erased from the back up memory in the ECM by depressing accelerator pedal. Refer to "How
to Erase Diagnostic Test Mode II (Self-diagnostic Results)".
•If the battery is disconnected, the DTC will be lost from the backup memory within 24 hours.
•Be careful not to erase the stored memory before starting trouble diagnoses.
OBD System Operation ChartINFOID:0000000003531608
RELATIONSHIP BETWEEN MIL, 1ST TRIP DTC, DTC, AND DETECTABLE ITEMS
• When a malfunction is detected for the first time, the 1st trip DTC and the 1st trip freeze frame data are
stored in the ECM memory.
• When the same malfunction is detected in two consecutive trips, the DTC and the freeze frame data are
stored in the ECM memory, and the MIL will come on. For details, refer to EC-48, "
Two Trip Detection Logic".
• The MIL will go off after the vehicle is driven 3 times (driving pattern B) with no malfunction. The drive is
counted only when the recorded driving pattern is met (as stored in the ECM). If another malfunction occurs
while counting, the counter will reset.
• The DTC and the freeze frame data will be stored until the vehicle is driven 40 times (driving pattern A) with-
out the same malfunction recurring (except for Misfire and Fuel Injection System). For Misfire and Fuel Injec-
PBIB3005E

EC-608
< SERVICE INFORMATION >
FUEL INJECTOR
FUEL INJECTOR
Component DescriptionINFOID:0000000003532160
The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the fuel injector circuit, the coil in the fuel injec-
tor is energized. The energized coil pulls the ball valve back and
allows fuel to flow through the fuel injector into the intake manifold.
The amount of fuel injected depends upon the injection pulse dura-
tion. Pulse duration is the length of time the fuel injector remains
open. The ECM controls the injection pulse duration based on
engine fuel needs.
CONSULT-II Reference Value in Data Monitor ModeINFOID:0000000003532161
Specification data are reference values.
SEF375Z
MONITOR ITEM CONDITION SPECIFICATION
B/FUEL SCHDL See EC-129
.
INJ PULSE-B1
INJ PULSE-B2• Engine: After warming up
• Air conditioner switch: OFF
• Selector lever: P or N
•No loadIdle 2.0 - 2.8 msec
2,000 rpm 1.9 - 2.9 msec

EM-36
< SERVICE INFORMATION >
ROCKER COVER
1. Apply liquid gasket to the joint part of the cylinder head andcamshaft bracket following the steps below.
NOTE:
Illustration shows an example of (LH) side (zoomed in shows
No.1 camshaft bracket).
a. Refer to illustration ″a ″ to apply liquid gasket to the joint part of
No.1 camshaft bracket and cylinder head.
b. Refer to illustration ″b ″ to apply liquid gasket 90 ° to illustration
″ a ″.
Use Genuine RTV Silicone Seal ant or equivalent. Refer to
GI-45, "
Recommended Chemical Product and Sealant".
2. Install the rocker cover (A) or (B). • Make sure the new rocker cover gasket is installed in the groove of the rocker cover (A) or (B).
• Tighten the bolts in two steps in the numerical order shown.
CAUTION:
Do not hold the rocker cover (RH) (B) by the oil filler neck.
3. Install the PCV hoses. NOTE:
• Remove foreign materials from inside the hose using com-
pressed air.
• The inserted length is within 25 - 30 mm (0.98 - 1.18 in) [Tar-
get: 25 mm (0.98 in)].
4. Installation of the remaining components is in the reverse order of removal.
KBIA2510E
1st step : 2.0 N·m (0.2 kg-m, 18 in-lb)
2nd step : 8.3 N·m (0.85 kg-m, 73 in-lb)
WBIA0697E

CYLINDER BLOCK
EM-95
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The connecting rod small end grade and piston pin hole (piston
pin) grade are provided only for the parts installed at the plant. For
service parts, no grades can be selected (only 0 grade is avail-
able).
PISTON RING SIDE CLEARANCE
• Measure side clearance of the piston ring and piston ring groove
using suitable tool.
• If out of specification, replace piston and/or piston ring assembly.
PISTON RING END GAP
• Check if the diameter of the cylinder bore is within specification.
• Insert the piston ring into the middle of the cylinder using the pis-
ton, and measure the gap.
• If out of specification, replace piston ring.
CONNECTING ROD BEND AND TORSION
• Check connecting rod alignment using suitable tool.
KBIA2536E
Standard:
Top ring : 0.035 - 0.085 mm (0.0014 - 0.0033 in)
2nd ring : 0.030 - 0.070 mm (0.0012 - 0.0028 in)
Oil ring : 0.015 - 0.050 mm (0.0006 - 0.0020 in)
Limit:
Top ring : 0.11 mm (0.0043 in)
2nd ring : 0.10 mm (0.0039 in)
SEM024AA
Standard
Top ring : 0.23 - 0.33 mm (0.0091 - 0.0130 in)
2nd ring : 0.25 - 0.40 mm (0.0098 - 0.0157 in)
Oil ring : 0.20 - 0.60 mm (0.0079 - 0.0236 in)
Limit:
Top ring : 0.56 mm (0.0220 in)
2nd ring : 0.52 mm (0.0205 in)
Oil ring : 0.96 mm (0.0378 in)
PBIC0118E
Limit:
Bend
: 0.15 mm (0.0059 in) per 100 mm (3.94 in) length
To r s i o n
: 0.30 mm (0.0118 in) per 100 mm (3.94 in) length
SEM003F

EM-106
< SERVICE INFORMATION >
SERVICE DATA AND SPECIFICATIONS (SDS)
Valve Dimensions
Unit: mm (in)
Valve Guide
Unit: mm (in)
Nominal cylinder head height “H” 126.3 (4.97) Items Standard Limit
KBIA2554E
Valve head diameter “D”Intake 37.0 - 37.3 (1.457 - 1.469)
Exhaust 31.2 - 31.5 (1.228 - 1.240)
Valve length “L”Intake 96.21- 96.71 (3.7878 - 3.8075)
Exhaust 93.74 - 94.24 (3.6905 - 3.7102)
Valve stem diameter “d”Intake 5.965 - 5.980 (0.2348 - 0.2354)
Exhaust 5.955 - 5.970 (0.2344 - 0.2350)
Valve seat angle “α”Intake
45°15′ - 45°45′
Exhaust
Valve margin “T”Intake 1.1 (0.043)
Exhaust 1.3 (0.051)
SEM188
Items Standard Oversize [0.2 (0.008)] (service)
KBIA2555E

SERVICE DATA AND SPECIFICATIONS (SDS)
EM-107
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Unit: mm (in)
Va l v e Sp r i n g
CYLINDER BLOCK
Unit: mm (in)
Valve guideOutside diameter 10.023 - 10.034 (0.3946 - 0.3950) 10.223 - 10.234 (0.4025 - 0.4029)
Inside diameter (Finished size) 6.000 - 6.018 (0.2362 - 0.2369) —
Cylinder head valve guide hole diameter 9.975 - 9.996 (0.3927 - 0.3935) 10.175 - 10.196 (0.4006 - 0.4014)
Interference fit of valve guide 0.027 - 0.059 (0.0011 - 0.0023)
Items Standard Limit
Stem to guide clearanceIntake 0.020 - 0.053 (0.0008 - 0.0021) 0.08 (0.0031)
Exhaust 0.030 - 0.063 (0.0012 - 0.0025) 0.09 (0.0035)
Projection length “L”Intake 12.6 - 12.8 (0.496 - 0.504)
Exhaust 12.5 - 12.9 (0.492 - 0.508)
Items Standard Oversize [0.5 (0.020)] (Service)
Cylinder head seat recess diameter ″D″Intake 38.000 - 38.016 (1.4961 - 1.4967) 38.500 - 38.516 (1.5157 - 1.5164)
Exhaust 32.200 - 32.216 (1.2677 - 1.2683) 32.700 - 32.716 (1.2874 - 1.2880)
Valve seat interference fitIntake 0.081 - 0.113 (0.0032 - 0.0044)
Exhaust 0.064 - 0.096 (0.0025 - 0.0038)
Valve seat diameter ″d″Intake 38.097 - 38.113 (1.4999 - 1.5005) 38.597 - 38.613 (1.5196 - 1.5202)
Exhaust 32.280 - 32.296 (1.2709 - 1.2715) 32.780 - 32.796 (1.2905 - 1.2912)
KBIA2541E
Free height mm (in)50.58 (1.9913)
Pressure N (kg, lb) at height mm (in)Installation 165.8 - 187.0 (16.9 - 19.1, 37 - 42) at 37.0 (1.457)
Valve open 314.8 - 355.0 (32.1 - 36.2, 71 - 80) at 28.2 (1.110)
Out-of-square mm (in) Less than 2.2 (0.087)
PBIC0123E

DRIVE SHAFT
FAX-11
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7. Install the boot securely into the grooves (indicated by * marks)
as shown.
CAUTION:
If there is grease on boot mounting surfaces (indicated by *
marks) of shaft and housing, boot may come off. Remove
all grease from surfaces.
8. Check that the boot installation length “L” is the length indicated
below. Insert a suitable tool into the large end of the boot, as
shown. Bleed air from the boot to prevent boot deformation.
CAUTION:
• The boot may break if the boot installation length is less than the specified value.
• Do not contact inside surface of boot with tip of the suitable tool.
9. Secure the large and small ends of the boot with the new boot
bands as shown.
NOTE:
Discard the old boot bands and use new ones for assembly.
10. After installing the sliding joint housing to the drive shaft, rotate the boot to check that the boot is posi-
tioned correctly. If the boot is not positioned correctly, reposition the boot and secure the boot using a new
boot band.
Wheel Side
1. Insert the Genuine NISSAN Grease or equivalent, into the joint
sub-assembly serration hole until the grease begins to ooze
from the ball groove and serration hole. Refer to MA-10
. After
inserting the grease, use a shop cloth to wipe off the grease that
has oozed out.
2. Wrap the serrated part of the drive shaft with tape. Install the
boot band and boot onto the shaft. Do not damage the boot.
NOTE:
Discard the old boot band and boot and use a new one for
assembly.
3. Remove the protective tape wound around the serrated part of
the drive shaft.Boot installation length “L ” : 145 mm (5.71 in)
WDIA0287E
SFA395
SDIA1127E
SFA800

FAX-12
< SERVICE INFORMATION >
DRIVE SHAFT
4. Attach the circlip to the drive shaftm making sure circlip fits
securely into groove on drive shaft. Then install drive shaft nut to
end of joint sub-assembly, and press-fit the circlip using a suit-
able tool as shown.
NOTE:
Discard the old circlip and use a new one for assembly.
5. Insert the specified quantity of Genuine NISSAN Grease or
equivalent, into the joint sub-assembly and the large end of the
boot. Refer to MA-10
.
6. Install the boot securely into the grooves (indicated by the *
marks) as shown.
CAUTION:
If there is grease on the boot mounting surfaces (indicated
by the * marks) of the drive shaft and joint sub-assembly,
the boot may come off. Remove all grease from the drive
shaft surfaces.
7. Check that the boot installation length “L” is the specified length.
Insert a suitable tool into the large end of the boot, as shown.
Bleed the air from the boot to prevent boot deformation.
CAUTION:
• The boot may break if the boot installation length is less than the specified length.
• Do not contact inside surface of boot with the tip of the suitable tool.
8. Secure large and small ends of the boot using new boot bands
using tool as shown.
NOTE:
Discard the old boot bands and use new ones for assembly.
• Secure boot band so that dimension "M" meets specification
as shown.
9. After installing the housing to the shaft, rotate the boot to check that it is positioned correctly. If the boot is
not positioned correctly, remove the old boot bands then reposition the boot and secure the boot with new
boot bands.Grease capacity : 145 − 165 g (5.11 − 5.82 oz)
RAC0049D
Boot installation length “L” : 168.4 mm (6.63 in)
Tool number : KV40107300 ( — )
WDIA0288E
RAC1133D
Dimension "M" : 1.0 – 4.0 mm (0.39 – 1.57 in)
DSF0047D

SERVICE DATA AND SPECIFICATIONS (SDS)
FAX-13
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SERVICE DATA AND SPECIFICATIONS (SDS)
Wheel BearingINFOID:0000000003532618
Drive ShaftINFOID:0000000003532619
Wheel bearing axial end play 0.05 mm (0.002 in) or less
Drive shaft joint typeFinal drive side Rzeppa
Wheel side Rzeppa
GreaseQualityNissan Genuine Grease or
equivalent
Capacity Final drive side 130 - 150 g (4.58 - 5.29 oz)
Wheel side 145 - 165 g (5.11 - 5.82 oz)
Boot length Final drive side "L" 145 mm (5.71 in)
Wheel side "L" 168.4 mm (6.63 in)
WDIA0055E

FSU-8
< SERVICE INFORMATION >
ON-VEHICLE SERVICE
1. Bounce the front of vehicle up and down to stabilize the vehicle height (posture).
2. Push the vehicle straight ahead about 5 m (16 ft).
3. Put a mark on base line of the tread (rear side) of both front tires
at the same height as hub center as shown. These marks are
measuring points.
4. Measure the distance “A” on the rear side of the front tires as
shown.
5. Push the vehicle slowly ahead to rotate the wheels 180°
degrees (1/2 a turn).
CAUTION:
If the wheels have rotated more than 180° degrees (1/2
turn), start this procedure again from the beginning. Never
push the vehicle backward.
6. Measure the distance “B” on the front side of the front tires at the
same marks as shown. Total toe-in is calculated as “A” – “B”.
7. Adjust the toe-in by varying the length of the steering outer
socket.
a. Loosen the outer tie-rod lock nuts.
b. Adjust the toe-in by screwing the outer tie-rods in or out.
c. Tighten the outer tie-rod lock nuts to specification.
FRONT WHEEL TURNING ANGLE
NOTE:
Check front wheel turning angle after the toe-in inspection.
1. Place front wheels on turning radius gauges in straight ahead
position and rear wheels on stands so that vehicle can be level.
Check the maximum inner and outer wheel turning angles for LH
and RH road wheels.
2. Start engine and run at idle, turn steering wheel all the way right
and left, measure the turning angle.
• Any turning angles are not adjustable. If any of steering angles
are out of the specification, check if the following parts are
worn or damaged.
- Steering gear
AFA050
Total toe-in : Refer to FSU-19, "Wheel Alignment (Un-
laden*1) *6".
SFA234AC
Standard length “L” : Refer to PS-26, "Steering Outer
Socket and Inner Socket".
Lock nut : Refer to PS-15, "
Removal and In-
stallation".
SGIA0167E
Wheel turning angle
(full turn): Refer to FSU-19, "Wheel
Alignment (Unladen*1) *6".
SFA439BA