Ins INFINITI QX56 2004 Factory Service Manual

LT-146
INTERIOR ROOM LAMP
Revision: August 20072004 QX56
Display Item List
ACTIVE TEST
Operation Procedure
1. Touch “INT LAMP” on “SELECT TEST ITEM” screen.
2. Touch “ACTIVE TEST” on “SELECT DIAG MODE” screen.
3. Touch item to be tested and check operation of the selected item.
4. During the operation check, touching “BACK” or "OFF" deactivates the operation.
Display Item List
Room/Map Lamp Control Does Not OperateEKS007D5
1. CHECK EACH SWITCH
Select “BCM” on CONSULT-II. With “INT LAMP” data monitor, make
sure switches listed in display item list turn ON-OFF linked with
switch operation. Refer to LT-146, "
Display Item List" for switches
and their functions.
OK or NG
OK >> GO TO 2.
NG >> Inspect malfunctioning switch system.
Monitor item Contents
IGN ON SW “ON/OFF” Displays “IGN position (ON)/OFF, ACC position (OFF)” judged from the ignition switch signal.
KEY ON SW “ON/OFF” Displays “Key inserted (ON)/key removed (OFF)” status judged from the key switch signal.
DOOR SW-DR “ON/OFF”Displays status of the front door LH as judged from the front door switch LH signal. (Door is
open: ON/Door is closed: OFF)
DOOR SW-AS “ON/OFF”Displays “Door open (ON)/Door closed (OFF)” status, determined from front door switch RH
signal.
DOOR SW-RR “ON/OFF”Displays “Door open (ON)/Door closed (OFF)” status, determined from rear door switch RH
signal.
DOOR SW-RL “ON/OFF”Displays “Door open (ON)/Door closed (OFF) ” status, determined from rear door switch LH
signal.
BACK DOOR SW “ON/OFF”Displays “Door open (ON)/Door closed (OFF)” status, determined from back door latch (door
ajar switch) signal.
KEY CYL LK-SW “ON/OFF”Displays “Door locked (ON) status, determined from front door lock assembly LH (key cylinder
switch) in front door LH.
KEY CYL UN-SW “ON/OFF”Displays “Door unlocked (OFF) status, determined from front door lock assembly LH (key cylin-
der switch) in front door LH.
CDL LOCK SW “ON/OFF”Displays “Door locked (ON)/Door unlocked (OFF) status, determined from locking detection
switch in front door LH.
CDL UNLOCK SW “ON/OFF”Displays “Door unlocked (OFF)” status, determined from locking detection switch in front door
RH.
KEYLESS LOCK “ON/OFF” Displays “Locked (ON)/Other (OFF)” status, determined from lock signal.
KEYLESS UNLOCK “ON/OFF” Displays “Unlocked (ON)/Other (OFF)” status, determined from unlock signal.
Test item Description
INT LAMP Interior room lamp can be operated by any ON-OFF operations.
IGN ILLUM Ignition keyhole illumination can be operated by ON-OFF operation.
SKIA5930E

INTERIOR ROOM LAMP
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2. ACTIVE TEST
1. Select “BCM” on CONSULT-II. Select “INT LAMP” active test.
2. When switch is in “DOOR” position, use active test to make sure
interior room lamp operates.
OK or NG
OK >> Replace BCM. Refer to BCS-19, "Removal and Installa-
tion of BCM" .
NG >> GO TO 3.
3. CHECK INTERIOR ROOM LAMP INPUT
1. Turn ignition switch OFF.
2. Check voltage between front room/map lamp assembly harness
connector R102 terminal 1 (L) and ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 5.
4. CHECK INTERIOR ROOM LAMP CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between BCM harness connector M20 terminal
63 (L) and front room/map lamp assembly harness connector
R102 terminal 1 (L).
OK or NG
OK >> Replace BCM if interior lamp does not work after setting
the connector again. Refer to BCS-19, "
Removal and
Installation of BCM" .
NG >> Repair harness or connector.
5. CHECK INTERIOR ROOM LAMP CIRCUIT
1. Disconnect BCM connector and interior room lamp connector.
2. Check continuity between BCM harness connector M20 terminal
56 (R/G) and front room/map lamp assembly harness connector
R102 terminal 6 (R/G).
OK or NG
OK >> Replace BCM if interior lamp does not work after setting
the connector again. Refer to BCS-19, "
Removal and
Installation of BCM" .
NG >> Repair harness or connector between BCM and room/
map lamp. Room lamps should turn ON.
LKIA0092E
Battery voltage should exist.
WKIA1479E
Continuity should exist.
WKIA1480E
Continuity should exist.
WKIA1481E

LT-148
INTERIOR ROOM LAMP
Revision: August 20072004 QX56
Personal Lamp Control Does Not Operate (Room/Map Lamps Operate)EKS007D6
1. CHECK EACH DOOR SWITCH
Select “BCM” on CONSULT-II. With “INT LAMP” data monitor, make
sure switches listed in display item list turn ON-OFF linked with
switch operation. Refer to LT- 1 3 1 , "
SWITCH OPERATION" for
switches and their function.
OK or NG
OK >> GO TO 2.
NG >> Inspect malfunctioning door switch.
2. CHECK PERSONAL LAMP OUTPUT
1. Turn ignition switch OFF.
2. Confirm lamp switch is in the "DOOR" position.
3. Disconnect personal lamp connector.
4. Open any door.
5. Check voltage between personal lamp harness connector termi-
nal 3 (R/G) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK PERSONAL LAMP CONTROL CIRCUIT
1. Disconnect front room/map lamp assembly connector.
2. Check continuity between front room/map lamp assembly har-
ness connector R102 terminal 2 (R) and personal lamp harness
connector terminal 1 (R).
OK or NG
OK >> Replace personal lamp.
NG >> Repair harness or connector.
SKIA5930E
Battery voltage should exist.
WKIA1482E
Continuity should exist.
WKIA1908E

INTERIOR ROOM LAMP
LT-149
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All Step/Foot/Puddle Lamps Do Not OperateEKS007D7
1. CHECK EACH DOOR SWITCH
Select “BCM” on CONSULT-II. With “INT LAMP” data monitor, make
sure switches listed in display item list turn ON-OFF linked with
switch operation. Refer to LT- 1 4 6 , "
Display Item List" for switches
and their functions.
OK or NG
OK >> GO TO 2.
NG >> Inspect malfunctioning switch system.
2. CHECK STEP LAMP POWER SUPPLY
1. Turn ignition switch OFF.
2. Check voltage between front step lamp LH harness connector
D11 terminal + (R/G) and ground.
OK or NG
OK >> GO TO 3.
NG >> GO TO 4.
3. CHECK STEP LAMP CONTROL CIRCUIT
1. Disconnect BCM connector and front step lamp LH connector.
2. Check continuity between BCM harness connector M20 terminal
62 (R/W) and front step lamp LH harness connector D11 termi-
nal – (R/W).
OK or NG
OK >> Replace BCM if step lamp does not work after setting
the connector again. Refer to BCS-19, "
Removal and
Installation of BCM" .
NG >> Repair harness or connector.
4. CHECK STEP LAMP CIRCUIT
1. Disconnect BCM connector and step lamp LH connector.
2. Check continuity between BCM harness connector M20 terminal
56 (R/G) and front step lamp LH harness connector D11 termi-
nal + (R/G).
OK or NG
OK >> Replace BCM if step lamp does not work after setting
the connector again. Refer to BCS-19, "
Removal and
Installation of BCM" .
NG >> Repair harness or connector.
SKIA5930E
Battery voltage should exist.
LKIA0306E
Continuity should exist.
WKIA1484E
Continuity should exist.
WKIA1485E

LT-150
INTERIOR ROOM LAMP
Revision: August 20072004 QX56
All Interior Room Lamps Do Not OperateEKS007D8
1. CHECK POWER SUPPLY CIRCUIT
1. All interior room lamp switches are OFF.
2. Turn ignition switch ON.
3. Check voltage between BCM harness connector M20 terminal
56 (R/G) and ground.
OK or NG
OK >> Repair harness or connector. To prevent making a short
circuit, be sure to disconnect battery negative cable
after repairing harness, and then reconnect.
NG >> Replace BCM. Refer to BCS-19, "
Removal and Installa-
tion of BCM" .
Ignition Keyhole Illumination Control Does Not OperateEKS007TS
1. CHECK EACH SWITCH
Select “BCM” on CONSULT-II. With “INT LAMP” data monitor, make
sure switches listed in display item list turn ON-OFF linked with
switch operation. Refer to LT-146, "
Display Item List" for switches
and their functions.
OK or NG
OK >> GO TO 2.
NG >> Inspect malfunctioning switch system.
2. ACTIVE TEST
1. Select “BCM” on CONSULT-II. Select “INT LAMP”.
2. Select “IGN ILLUM” active test to make sure lamp operates.
OK or NG
OK >> Replace BCM. Refer to BCS-19, "Removal and Installa-
tion of BCM" .
NG >> GO TO 3.
3. CHECK IGNITION KEYHOLE ILLUMINATION INPUT
1. Check voltage between ignition keyhole illumination harness
connector M150 terminal + (R/G) and ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 6.Battery voltage should exist.
WKIA1486E
SKIA5930E
Keyhole illumination should turn ON.
SKIA3992E
Battery voltage should exist.
WKIA1909E

INTERIOR ROOM LAMP
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4. CHECK IGNITION KEYHOLE ILLUMINATION BULB
1. Disconnect ignition keyhole illumination connector.
2. Check continuity between ignition keyhole illumination terminals
+ and –.
OK or NG
OK >> GO TO 5.
NG >> Replace ignition keyhole illumination.
5. CHECK IGNITION KEYHOLE ILLUMINATION CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between BCM harness connector M18 terminal
1 (BR/W) and keyhole illumination harness connector M150 ter-
minal – (BR/W).
OK or NG
OK >> Replace BCM if ignition keyhole illumination does not
work after setting the connector again. Refer to BCS-19,
"Removal and Installation of BCM" .
NG >> Repair harness or connector.
6. CHECK IGNITION KEYHOLE ILLUMINATION CIRCUIT
1. Disconnect BCM connector and keyhole illumination connector.
2. Check continuity between BCM harness connector M19 terminal
56 (R/G) and keyhole illumination harness connector M150 ter-
minal + (R/G).
OK or NG
OK >> Replace BCM if ignition keyhole illumination does not
work after setting the connector again. Refer to BCS-19,
"Removal and Installation of BCM" .
NG >> Repair harness or connector.Continuity should exist.
WKIA1910E
Continuity should exist.
WKIA1911E
Continuity should exist.
WKIA1912E

ILLUMINATION
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Removal and InstallationEKS007DE
ILLUMINATION CONTROL SWITCH
1. Remove cluster lid A. Refer to DI-25, "Removal and Installation of Combination Meter" .
2. Carefully pry tabs and remove illumination control switch from
cluster lid A.
Installation is in the reverse order of removal.
WKIA1403E

LU-1
ENGINE LUBRICATION SYSTEM
B ENGINE
CONTENTS
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SECTION LU
A
LU
Revision: August 20072004 QX56 PRECAUTIONS .......................................................... 2
Precautions for Liquid Gasket .................................. 2
REMOVAL OF LIQUID GASKET SEALING .......... 2
LIQUID GASKET APPLICATION PROCEDURE ..... 2
PREPARATION ........................................................... 3
Special Service Tools ............................................... 3
Commercial Service Tool ......................................... 4
LUBRICATION SYSTEM ............................................ 5
Lubrication Circuit .................................................... 5
System Drawing ....................................................... 6
ENGINE OIL ............................................................... 7
Inspection ................................................................. 7
OIL LEVEL ............................................................ 7
OIL APPEARANCE ............................................... 7
OIL LEAKAGE ....................................................... 7
OIL PRESSURE CHECK ...................................... 7
Changing Engine Oil ................................................ 8
OIL FILTER ............................................................... 10
Removal and Installation ........................................ 10
REMOVAL ........................................................... 10
INSTALLATION ................................................... 10
INSPECTION AFTER INSTALLATION ............... 10OIL COOLER ............................................................ 11
Removal and Installation ........................................ 11
REMOVAL ........................................................... 11
INSPECTION AFTER REMOVAL ....................... 11
INSTALLATION ................................................... 12
INSPECTION AFTER INSTALLATION ................ 12
OIL PUMP ................................................................. 13
Removal and Installation ........................................ 13
REMOVAL ........................................................... 13
INSTALLATION ................................................... 13
INSPECTION AFTER INSTALLATION ................ 14
Disassembly and Assembly .................................... 14
DISASSEMBLY ................................................... 14
INSPECTION AFTER DISASSEMBLY ................ 14
ASSEMBLY ......................................................... 15
SERVICE DATA AND SPECIFICATIONS (SDS) ...... 16
Standard and Limit .................................................. 16
OIL PRESSURE .................................................. 16
OIL PUMP ........................................................... 16
REGULATOR VALVE .......................................... 16
ENGINE OIL CAPACITY (APPROXIMATE) ........ 16

LU-2Revision: August 2007
PRECAUTIONS
2004 QX56
PRECAUTIONSPFP:00001
Precautions for Liquid GasketEBS00I4E
REMOVAL OF LIQUID GASKET SEALING

After removing the bolts and nuts, separate the mating surface
and remove the old liquid gasket sealing using Tool.
CAUTION:
Do not damage the mating surfaces.

Tap the seal cutter to insert it.

In areas where the Tool is difficult to use, lightly tap to slide it.
LIQUID GASKET APPLICATION PROCEDURE
1. Remove the old liquid gasket adhering to the gasket application
surface and the mating surface using suitable tool.

Remove the liquid gasket completely from the groove of the
liquid gasket application surface, bolts, and bolt holes.
2. Thoroughly clean the mating surfaces and remove adhering
moisture, grease and foreign material.
3. Attach the liquid gasket tube to the Tool.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-45, "
Recommended Chemical Products and Sealants" .
4. Apply the liquid gasket without breaks to the specified location
with the specified dimensions.

If there is a groove for the liquid gasket application, apply the
liquid gasket to the groove.

As for the bolt holes, normally apply the liquid gasket inside
the holes. If specified in the procedure, it should also be
applied outside the holes.

Within five minutes of liquid gasket application, install the mat-
ing component.

If the liquid gasket protrudes, wipe it off immediately.

Do not retighten after the installation.

Wait 30 minutes or more after installation before refilling the
engine with engine oil and engine coolant.
CAUTION:
If there are specific instructions in this manual, observe them.Too l n u mb er : K V 1011110 0 (J -37228)
WBIA0566E
PBIC0003E
Tool number : WS39930000 ( — )
WBIA0567E
SEM 15 9F

PREPARATION
LU-3
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Revision: August 20072004 QX56
PREPARATIONPFP:00002
Special Service ToolsEBS00I4F
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool nameDescription
ST25051001
(J-25695-1)
Oil pressure gaugeMeasuring oil pressure
Maximum measuring range:
2,452 kPa (25 kg/cm
2 , 356 psi)
ST25052000
(J-25695-2)
HoseAdapting oil pressure gauge to cylinder block
KV10111100
(J-37228)
Seal cutterRemoving steel oil pan and rear timing chain
case
KV10115801
(J-38956)
Oil filter wrenchRemoving and installing oil filter
a: 64.3 mm (2.531 in)
WS39930000
(—)
Tube presserPressing the tube of liquid gasket
S-NT050
S-NT559
NT046
S-NT375
S-NT052