ESP INFINITI QX56 2011 Factory Manual PDF

EM-114
< UNIT DISASSEMBLY AND ASSEMBLY >
CYLINDER BLOCK
 Before installing connecting rod bearings, apply engine oil to the bearing surface (inside). Do not applyengine oil to the back surface, but thoroughly clean it.
 When installing, align connecting rod bearing stopper protru-
sion (B) with cutout (A) of connecting rods and connecting rod
bearing caps to install.
 Ensure the oil hole (C) on connecting rod and that on the cor-
responding bearing are aligned.
13. Install piston and connecting rod assembly to crankshaft.  Position crankshaft pin corresponding to connecting rod to be installed onto the bottom dead center.
 Apply engine oil sufficiently to the cylinder bore, piston and crankshaft pin journal.
 Match the cylinder position with the cyli nder number on connecting rod to install.
 Be sure that front mark on piston cr own is facing the front of the engine.
 Using a piston ring compressor [SST: EM03470000 (J-8037)]
(A) or suitable tool, install piston with the front mark on the pis-
ton crown facing the front of the engine.
CAUTION:
Be careful not to damage the cylinder wall and crankshaft
pin, resulting from an interf erence of the connecting rod big
end.
14. Install connecting rod bearing cap.  Match the stamped cylinder number marks on connecting rodwith those on connecting rod bearing cap to install.
 Be sure that front mark (H) on connecting rod bearing cap is facing the front of the engine.
15. Tighten connecting rod bolts as per the following:
a. Inspect the outer diameter of connecting rod bolt. Refer to EM-115, "
Inspection".
b. Apply engine oil to the threads and seats of connecting rod bolts.
c. Tighten connecting rod bolts.
d. Completely loosen connecting rod bolts.
e. Tighten connecting rod bolts.
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PBIC3244J
A: Sample codes
B : Bearing stopper groove
C : Small-end diameter grade
D : Big-end diameter grade
E : Weight grade
F : Cylinder No.
G : Management code
: 29.4 N·m (3.0 kg-m, 21.7 ft-lb)
: 0 N·m (0 kg-m, 0 ft-lb)
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Revision: 2010 May2011 QX56

CYLINDER BLOCKEM-123
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 Cut a plastigage slightly shorter than the bearing width,
and place it in crankshaft axial direction, avoiding oil
holes.
 Install main bearing to cylinder block and main bearing cap, and tighten main bearing cap bolts with main
bearing cap to the specified torque. Refer to EM-107, "
Disassembly and Assembly" for the tightening proce-
dure.
CAUTION:
Never rotate crankshaft.
 Remove main bearing cap and bearings, and using the scale on the plastigage bag, measure the plastigage width.
NOTE:
The procedure when the measured value exceeds the limit is the
same as that described in the “Method by Calculation”.
MAIN BEARING CRUSH HEIGHT
 When main bearing cap is removed after being tightened to thespecified torque with main bearings (1) installed, the tip end of
bearing must protrude. Refer to EM-107, "
Disassembly and
Assembly" for the tightening procedure.
 If the standard is not met, replace main bearings.
CONNECTING ROD BEARING CRUSH HEIGHT
 When connecting rod bearing cap is removed after being tightened to the specified torque with connecting rod bearings (1) installed,
the tip end of bearing must protrude. Refer to EM-107, "
Disassem-
bly and Assembly" for the tightening procedure.
 If the standard is not met, replace connecting rod bearings.
MAIN BEARING CAP BOLT OUTER DIAMETER
 Measure the outer diameters (A), (B) at two positions as shown in
the figure.
 If reduction appears in (A) range, regard it (B).
 If it exceeds the limit (large difference in dimensions), replace main bearing cap bolts with new one.
MAIN BEARING CAP SUB BOLT OUTER DIAMETER
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A : Crush height
Standard : There must be crush height.
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A : Crush height
Standard : There must be crush height.
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c : 20 mm (0.79 in)
d : 55 mm (2.17 in)
e : 12 mm (0.47 in)
Limit [(B) – (A)] : 0.15 mm (0.0059 in)
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Revision: 2010 May2011 QX56

HOW TO SELECT PISTON AND BEARINGEM-127
< UNIT DISASSEMBLY AND ASSEMBLY >
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2. Apply crankshaft pin journal
diameter grade stamped on crank-
shaft front side to the column in the “CONNECTING ROD
BEARING SELECTION TABLE”.
3. Read the symbol at the cross point of select ed row and column in the “CONNECTING ROD BEARING
SELECTION TABLE”.
4. Apply the symbol obtained to the “CONNECTING ROD BEARING GRADE TABLE” to select connecting
rod bearing.
WHEN CONNECTING ROD AND CRANKSHAFT ARE REUSED
1. Measure connecting rod big end diameter and crankshaft pin journal diameter. Refer to EM-115, "Inspec-
tion".
2. Correspond the measured dimension in connecting rod big end diameter row of “CONNECTING ROD
BEARING SELECTION TABLE”.
3. Correspond the measured dimension in crankshaft pi n journal diameter column of “CONNECTING ROD
BEARING SELECTION TABLE”.
4. Follow from step 3 in “WHEN NEW CONNECTING ROD AND CRANKSHAFT ARE USED”.
CONNECTING ROD BEARING SELECTION TABLE
CONNECTING ROD BEARING GRADE TABLE
UNDERSIZE BEARING USAGE GUIDE
 When the specified connecting rod bearing oil clearance is not obtained with standard size connecting rod bearings, use undersize (US) bearings.
 When using undersize (US) bearing, measure the connecting rod bearing inner diameter with bearing
installed, and grind crankshaft pin so that the c onnecting rod bearing oil clearance satisfies the standard.
CAUTION:
A : Pin diameter grade No. 1
B : Pin diameter grade No. 2
C : Pin diameter grade No. 3
D : Pin diameter grade No. 4
E : Journal diameter grade No. 1
F : Journal diameter grade No. 2
G : Journal diameter grade No. 3
H : Journal diameter grade No. 4
I : Journal diameter grade No. 5
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Connecting rod bearing grade table : Refer to EM-142, "ConnectingRodBearing".
Revision: 2010 May2011 QX56

EM-128
< UNIT DISASSEMBLY AND ASSEMBLY >
HOW TO SELECT PISTON AND BEARING
In grinding crankshaft pin to use undersize bearings, keep the
fillet R (A) [1.5 - 1.7 mm (0.059 - 0.067 in)].
Main BearingINFOID:0000000006289588
WHEN NEW CYLINDER BLOCK AND CRANKSHAFT ARE USED
1. Apply the main bearing housing grade on the bottom face of thecylinder block to the row in “MAIN BEARING SELECTION
TA B L E ” .
2. “MAIN BEARING SELECTION TABLE” columns correspond to
journal diameter grade on front side of crankshaft.
3. Select main bearing grade at the point where selected row and column meet in “MAIN BEARING SELEC- TION TABLE”.
CAUTION:
 Initial clearance for No. 1, 5 journal and No. 2, 3, 4 journal is different. Use two different selection
table for each part.
 No. 1, 5 journal and No. 2, 3, 4 journal have the same signs but different measures. Never con-
fuse.
4. Apply sign at crossing in above step 3 to “MAIN BEARING GRADE TABLE”.
NOTE:
 “MAIN BEARING GRADE TABLE” applies to all journals.
 Service parts are available as a set of both upper and lower.
WHEN CYLINDER BLOCK AND CRANKSHAFT ARE REUSED
1. Measure cylinder block main bearing housing inner diameter and crankshaft main journal diameter. Refer to EM-115, "
Inspection".
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Bearing undersize table : Refer to EM-142, "ConnectingRodBearing".
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A : Pin diameter grade No. 1
B : Pin diameter grade No. 2
C : Pin diameter grade No. 3
D : Pin diameter grade No. 4
E : Journal diameter grade No. 1
F : Journal diameter grade No. 2
G : Journal diameter grade No. 3
H : Journal diameter grade No. 4
I : Journal diameter grade No. 5
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Revision: 2010 May2011 QX56

HOW TO SELECT PISTON AND BEARINGEM-129
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2. Correspond the measured dimension in “Cylinder
block main bearing housing inner diameter” row of
“MAIN BEARING SELECTION TABLE”.
3. Correspond the measured dimension in “Crankshaft main journal diameter” column of “MAIN BEARING
SELECTION TABLE”.
4. Follow from step 3 in “When New Cylinder Block and Crankshaft are Used”.
MAIN BEARING SELECTION TABLE (No. 1 and 5 Journal)
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Revision: 2010 May2011 QX56

PARKING LAMP CIRCUITEXL-97
< DTC/CIRCUIT DIAGNOSIS > [XENON TYPE]
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3. Select “EXTERNAL LAMPS” of IPDM E/R active test item.
4. With operating the test items, check vo ltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace IPDM E/R.
5.CHECK PARKING LAMP OPEN CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check continuity between IPDM E/R harness connec tor and front combination lamp harness connector.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair or replace harness.
6.CHECK PARKING LAMP GROUND OPEN CIRCUIT
Check continuity between front combination lamp harness connector and ground.
Is the inspection result normal?
YES >> Check corresponding bulb socket and harness. Repair or replace if necessary.
NO >> Repair or replace harness.
(+)
(− ) Test item Voltag e
(Approx.)
IPDM E/R
Connector Terminal
RH E1437
GroundEXTERNAL
LAMPS TAIL Battery voltage
Off 0 V
LH 43 TAIL Battery voltage
Off 0 V
IPDM E/R Front combination lamp
Continuity
Connector Terminal Connector Terminal
RH E1437 E119
7 Existed
LH 43 E118
Front combination lamp
GroundContinuity
Connector Terminal
RH E119 3Existed
LH E118
Revision: 2010 May2011 QX56

EXL-98
< DTC/CIRCUIT DIAGNOSIS >[XENON TYPE]
FRONT SIDE MARKER LAMP CIRCUIT
FRONT SIDE MARKER LAMP CIRCUIT
Component Function CheckINFOID:0000000006238400
1.CHECK PARKING LAMP OPERATION
Check that the parking lamp is turned ON.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Refer to EXL-96, "
Component Function Check".
2.CHECK FRONT SIDE MARKER LAMP OPERATION
CONSULT-III ACTIVE TEST
1. Select “EXTERNAL LAMPS” of IPDM E/R active test item.
2. With operating the lighting switch, check that the front side marker lamp is turned ON.
Is the inspection result normal?
YES >> Front side marker lamp circuit is normal.
NO >> Refer to EXL-98, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006238401
1.CHECK FRONT SIDE MARKER LAMP BULB
Check the applicable lamp bulb.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace bulb.
2.CHECK FRONT SIDE MARKER LAMP OPEN CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector and front combination lamp connector.
3. Check continuity between IPDM E/R harness connec tor and front combination lamp harness connector.
Is the inspection result normal?
YES >> Check corresponding bulb socket and harness. Repair or replace if necessary.
NO >> Repair or replace harness. TAIL : Front side marker lamp ON
Off : Front side marker lamp OFF
IPDM E/R Front combination lamp
Continuity
Connector Terminal Connector Terminal
LH E1443 E118
4 Existed
RH 37 E119
Revision: 2010 May2011 QX56

TURN SIGNAL LAMP CIRCUITEXL-101
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Rear turn signal lamp
Is the inspection result normal?
YES >> Check corresponding bulb socket and harness. Repair or replace if necessary.
NO >> Repair or replace harness.
Rear combination lamp GroundContinuity
Connector Terminal
LH B60 4 Existed
RH B232
Revision: 2010 May2011 QX56

TAIL LAMP CIRCUITEXL-111
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Is the inspection result normal?
YES >> Tail lamp (back door side) circuit is normal.
NO >> Refer to E X L - 111 , "
BACK DOOR SIDE : Diagnosis Procedure".
BACK DOOR SIDE : Diagnosis ProcedureINFOID:0000000006238403
1.CHECK TAIL LAMP (BACK DOOR SIDE) BULB
Check the applicable lamp bulb.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace bulb.
2.CHECK TAIL LAMP (BACK DOOR SIDE) OPEN CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector and tail lamp (back door side) connector.
3. Check continuity between IPDM E/R harness connec tor and tail lamp (back door side) harness connector.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness.
3.CHECK TAIL LAMP (BACK DOOR SIDE) GROUND OPEN CIRCUIT
Check continuity between tail lamp (back door side) harness connector and ground.
Is the inspection result normal?
YES >> Check corresponding bulb socket and harness. Repair or replace if necessary.
NO >> Repair or replace harness. TAIL : Tail lamp (back door side) ON
Off : Tail lamp (back door side) OFF
IPDM E/R Tail lamp (back door side)
Continuity
Connector Terminal Connector Terminal
LH E14 44 D169
1 Existed
RH D117
Tail lamp (back door side)
GroundContinuity
Connector Terminal
LH D169 2Existed
RH D117
Revision: 2010 May2011 QX56

EXL-112
< DTC/CIRCUIT DIAGNOSIS >[XENON TYPE]
LICENSE PLATE LAMP CIRCUIT
LICENSE PLATE LAMP CIRCUIT
Component Function CheckINFOID:0000000006213978
1.CHECK TAIL LAMP OPERATION
Check that the tail lamp is turned ON.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Refer to EXL-109, "
BODY SIDE : Component Function Check".
2.CHECK LICENSE PLATE LAMP OPERATION
CONSULT-III ACTIVE TEST
1. Select “EXTERNAL LAMPS” of IPDM E/R active test item.
2. With operating the lighting switch, check t hat the license plate lamp is turned ON.
Is the inspection result normal?
YES >> License plate lamp circuit is normal.
NO >> Refer to EXL-112, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006213979
1.CHECK LICENSE PLATE LAMP BULB
Check the applicable lamp bulb.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace bulb.
2.CHECK LICENSE PLATE LAMP OPEN CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector and license plate lamp connector.
3. Check continuity between IPDM E/R harness connector and license plate lamp harness connector.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness.
3.CHECK LICENSE PLATE LAMP GROUND OPEN CIRCUIT
Check continuity between license plate lamp harness connector and ground.
Is the inspection result normal?
YES >> Check corresponding bulb socket and harness. Repair or replace if necessary.
NO >> Repair or replace harness. TAIL : License plate lamp ON
Off : License plate lamp OFF
IPDM E/R License plate lamp
Continuity
Connector Terminal Connector Terminal
LH E14 44 D167
1 Existed
RH D168
License plate lamp
GroundContinuity
Connector Terminal
LH D167 2 Existed
RH D168
Revision: 2010 May2011 QX56