ignition INFINITI QX56 2007 Factory Service Manual

INTERIOR ROOM LAMP
LT-115
< SERVICE INFORMATION >
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ACTIVE TEST
Display Item List
Room/Map Lamp Control Does Not OperateINFOID:0000000003533463
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-114, "
CONSULT-II Function (BCM)" 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" 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-24, "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 and ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 5.
4.CHECK INTERIOR ROOM LAMP CIRCUIT
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.Monitor item Contents
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
Room lamps should turn ON.
LKIA0092E
1 - Ground : Battery voltage should exist.
WKIA1479E

LT-116
< SERVICE INFORMATION >
INTERIOR ROOM LAMP
1. Disconnect BCM connector.
2. Check continuity between BCM harness connector M20 terminal
63 and front room/map lamp assembly harness connector R102
terminal 1.
OK or NG
OK >> Replace BCM if interior lamp does not work after setting
the connector again. Refer to BCS-24, "
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 and front room/map lamp assembly harness connector R102
terminal 6.
OK or NG
OK >> Replace BCM if interior lamp does not work after setting
the connector again. Refer to BCS-24, "
BCM" .
NG >> Repair harness or connector between BCM and room/
map lamp.
Personal Lamp Control Does Not Operate (Room/Map Lamps Operate)INFOID:0000000003533464
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-101, "
System Description" 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 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3.CHECK PERSONAL LAMP CONTROL CIRCUIT63 - 1 : Continuity should exist.
WKIA1480E
56 - 6 : Continuity should exist.
WKIA1481E
SKIA5930E
3 - Ground : Battery voltage should exist.
WKIA1482E

INTERIOR ROOM LAMP
LT-117
< SERVICE INFORMATION >
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1. Disconnect front room/map lamp assembly connector.
2. Check continuity between front room/map lamp assembly har-
ness connector R102 terminal 2 and personal lamp harness
connector terminal 1.
OK or NG
OK >> Replace personal lamp.
NG >> Repair harness or connector.
All Step/Foot/Puddle Lamps Do Not OperateINFOID:0000000003533465
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-114, "
CONSULT-II Function (BCM)" 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 + 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 and front step lamp LH harness connector D11 terminal –.
OK or NG
OK >> Replace BCM if front step lamp does not work after set-
ting the connector again. Refer to BCS-24, "
BCM" .
NG >> Repair harness or connector.
4.CHECK STEP LAMP CIRCUIT2 - 1 : Continuity should exist.
WKIA1908E
SKIA5930E
+ - Ground : Battery voltage should exist.
LKIA0306E
– - 62 : Continuity should exist.
WKIA1484E

LT-118
< SERVICE INFORMATION >
INTERIOR ROOM LAMP
1. Disconnect BCM connector and front step lamp LH connector.
2. Check continuity between BCM harness connector M20 terminal
56 and front step lamp LH harness connector D11 terminal +.
OK or NG
OK >> Replace BCM if front step lamp does not work after set-
ting the connector again. Refer to BCS-24, "
BCM" .
NG >> Repair harness or connector.
All Interior Room Lamps Do Not OperateINFOID:0000000003533466
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 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-24, "
BCM" .
Ignition Keyhole Illumination Control Does Not OperateINFOID:0000000003533467
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-114, "
CONSULT-II Function (BCM)" 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-24, "BCM".
NG >> GO TO 3.
3.CHECK IGNITION KEYHOLE ILLUMINATION INPUT+ - 56 : Continuity should exist.
WKIA1485E
56 - Ground : Battery voltage should exist.
WKIA1486E
SKIA5930E
Ignition keyhole illumination should turn ON.
SKIA3992E

INTERIOR ROOM LAMP
LT-119
< SERVICE INFORMATION >
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1. Check voltage between ignition keyhole illumination harness
connector M150 terminal + and ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 6.
4.CHECK IGNITION KEYHOLE ILLUMINATION BULB
1. Turn ignition switch OFF.
2. Disconnect ignition keyhole illumination connector.
3. 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 and ignition keyhole illumination harness connector M150 ter-
minal –.
OK or NG
OK >> Replace BCM if ignition keyhole illumination does not
work after setting the connector again. Refer to BCS-24,
"BCM" .
NG >> Repair harness or connector.
6.CHECK IGNITION KEYHOLE ILLUMINATION CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector and keyhole illumination connector.
3. Check continuity between BCM harness connector M20 terminal
56 and ignition keyhole illumination harness connector M150
terminal +.
OK or NG
OK >> Replace BCM if ignition keyhole illumination does not
work after setting the connector again. Refer to BCS-24,
"BCM" .
NG >> Repair harness or connector.+ - Ground : Battery voltage should exist.
WKIA1909E
+ - – : Continuity should exist.
WKIA3556E
– - 1 : Continuity should exist.
WKIA1911E
+ - 56 : Continuity should exist.
WKIA1912E

LT-120
< SERVICE INFORMATION >
ILLUMINATION
ILLUMINATION
Component Parts and Harness Connector LocationINFOID:0000000003533468
System DescriptionINFOID:0000000003533469
Control of the illumination lamps operation is dependent upon the position of the lighting switch (combination
switch). When the lighting switch is placed in the 1ST or 2ND position (or if the auto light system is activated)
the BCM (body control module) receives input signal requesting the illumination lamps to illuminate. This input
signal is communicated to the IPDM E/R (intelligent power distribution module engine room) across the CAN
communication lines. The CPU (central processing unit) of the IPDM E/R controls the tail lamp relay coil. This
relay, when energized, directs power to the illumination lamps, which then illuminate.
Power is supplied at all times
• to ignition relay, located in the IPDM E/R,
• to tail lamp relay, located in the IPDM E/R,
• through 50A fusible link (letter f , located in the fuse and fusible link box)
• to BCM terminal 70,
• through 20A fuse (No. 53, located in the IPDM E/R)
• to CPU of the IPDM E/R, and
• through 10A fuse [No.19, located in fuse block (J/B)]
• to combination meter terminal 8
With the ignition switch in the ON or START position, power is supplied
• to ignition relay, located in the IPDM E/R,
• through 10A fuse (No. 59, located in the fuse and relay box)
WKIA3471E

LT-122
< SERVICE INFORMATION >
ILLUMINATION
• to front heated seat switch LH and RH terminal 6
• to VDC OFF switch terminal 4
• to tow mode switch terminal 4
• to headlamp aiming switch terminal 4
• to clock terminal 4 and
• to combination meter terminal 18.
Ground is supplied
• to illumination control switch terminal 3
• to glove box lamp terminal 2
• to door mirror remote control switch terminal 15
• to display control unit terminal 3
• to rear heated seat switches terminal 6
• to electric brake (pre-wiring) terminal 1 (with trailer tow)
• to combination meter terminal 17
• through grounds M57, M61 and M79, and
• to NAVI control unit terminal 1
• to rear air control terminal 3
• to rear audio remote control unit terminal 15
• through grounds B117 and B132.
With power and ground supplied, illumination lamps illuminate.
EXTERIOR LAMP BATTERY SAVER CONTROL
When the combination switch (lighting switch) is in the 1ST or 2ND position (or if auto light system is acti-
vated), and the ignition switch is turned from ON or ACC to OFF, the battery saver control function is activated.
Under this condition, the illumination lamps remain illuminated for 5 minutes, then the illumination lamps are
turned off.
When the lighting switch is turned from OFF to 1ST or 2ND position (or if auto light system is activated) after
illumination lamps are turned off by the battery saver control, the illumination lamps illuminate again.
Exterior lamp battery saver control mode can be changed by the function setting of CONSULT-II.
CAN Communication System DescriptionINFOID:0000000003533470
Refer to LAN-4, "CAN Communication System" .

LT-138
< SERVICE INFORMATION >
BULB SPECIFICATIONS
BULB SPECIFICATIONS
HeadlampINFOID:0000000003533474
*: Always check with the Parts Department for the latest parts information.
Exterior LampINFOID:0000000003533475
*: Always check with the Parts Department for the latest parts information.
Interior Lamp/IlluminationINFOID:0000000003533476
*: Always check with the Parts Department for the latest parts information.Item Wattage (W)*
Low35 (D2R)
High60 (HB3)
Item Wattage (W)*
Front combination lampParking lamp (inner) 7
Parking lamp (outer) 7
Side marker lamp (front) 7
Rear combination lampStop/Tail lamp *
Side marker lamp (rear) *
Turn signal lamp 27
Back-up lamp*
Turn/fog lampFog 55 (H3)
Turn 21
License plate lamp5
High-mounted stop lamp*
Item Wattage (W)*
Glove box lamp3.4
Room/Map lamp8
Console box illumination lamp*
A/T device lamp2
Foot lamp3.4
Ste p lam p3.8
Cargo lamp7
Vanity lamp1.32
Personal lamp5
Puddle lamp8
Ignition keyhole illumination lamp0.74

MA-12
< SERVICE INFORMATION >
ENGINE MAINTENANCE
ENGINE MAINTENANCE
Checking Drive BeltsINFOID:0000000003533866
WARNING:
Be sure to perform when the engine is stopped.
1. Remove air duct and resonator assembly (inlet) when inspecting drive belt.
2. Make sure that indicator (single line notch) of each auto tensioner is within the allowable working range
“A” (between three line notches) as shown.
NOTE:
• Check the auto tensioner indication when the engine is cold.
• When the new drive belt is installed, the range should be “A” as shown.
• The indicator notch is located on the moving side of the auto tensioner.
3. Visually check entire belt for wear, damage or cracks.
4. If the indicator is out of allowable working range or belt is damaged, replace the belt. Refer to EM-13,
"Removal and Installation".
DRIVE BELT TENSION
There is no manual drive belt tension adjustment. The drive belt tension is automatically adjusted by the auto
tensioner.
Changing Engine CoolantINFOID:0000000003533867
WARNING:
• To avoid being scalded, never change the coolant when the engine is hot.
• Wrap a thick cloth around the cap to carefully remove the cap. First, turn the cap a quarter of a turn
to release any built-up pressure, then push down and turn the cap all the way to remove it.
DRAINING ENGINE COOLANT
1. Turn ignition switch ON and set temperature control lever all the way to HOT position or the highest tem-
perature position. Wait 10 seconds and turn ignition switch OFF.
2. Remove the engine front undercover using power tool.
1. Drive belt 2. Power steering oil pump pulley 3. Generator pulley
4. Crankshaft pulley 5. A/C compressor 6. Idler pulley
7. Cooling fan pulley 8. Water pump pulley 9. Drive belt tensioner
LBIA0391E

ENGINE MAINTENANCE
MA-13
< SERVICE INFORMATION >
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3. Open the radiator drain plug at the bottom of the radiator, and
remove the radiator filler cap. This is the only step required
when partially draining the cooling system (radiator only).
CAUTION:
Do not to allow the coolant to contact the drive belts.
4. When draining all of the coolant in the system for engine
removal or repair, it is necessary to drain the cylinder block.
Remove the RH cylinder block drain plug to drain the right bank
and the oil cooler hose to drain the left bank as shown.
5. Remove the reservoir tank to drain the engine coolant, then clean the reservoir tank before installing it.
6. Check the drained coolant for contaminants such as rust, corrosion or discoloration.
If the coolant is contaminated, flush the engine cooling system. Refer to CO-9, "
Changing Engine Cool-
ant" .
REFILLING ENGINE COOLANT
1. Close the radiator drain plug. Install the reservoir tank, cylinder block drain plug, and the oil cooler hose, if
removed for a total system drain or for engine removal or repair.
• The radiator must be completely empty of coolant and water.
• Apply sealant to the threads of the cylinder block drain plug. Use Genuine High Performance Thread
Sealant or equivalent. Refer to GI-45
.
2. Set the vehicle heater controls to the full HOT and heater ON position. Turn the vehicle ignition ON with
the engine OFF as necessary to activate the heater mode.
3. Remove the vented reservoir cap and replace it with a non-vented reservoir cap before filling the cooling
system.
WBIA0391E
PBIC0146E
WBIA0392E
Radiator drain plug : Refer to CO-13 .
RH cylinder block drain plug : Refer to EM-78
.