turn signal INFINITI QX56 2010 Factory Service Manual

ENGINE CONTROL SYSTEM SYMPTOMSEC-479
< SYMPTOM DIAGNOSIS > [VK56DE]
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SYMPTOM
Reference
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HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
Fuel Fuel tank 5
5 FL-11
Fuel piping
5 5 5 5 55FL-6
Va p o r l o c k —
Valve deposit 5 555 55 5—
Poor fuel (Heavy weight gasoline,
Low octane) —
Air Air duct
55555 5 EM-25
Air cleaner
EM-25
Air leakage from air duct
(Mass air flow sensor — electric
throttle control actuator)
5555 EM-25
Electric throttle control actuator
EM-26
Air leakage from intake manifold/
Collector/GasketEM-26
Cranking Battery
111111
11
PG-74
Generator circuit
CHG-6
Starter circuit3 STR-8
Signal plate6 EM-45
Park/Neutral position (PNP) sig-
nal4
TM-45
Engine Cylinder head
55555 55 5 EM-68
Cylinder head gasket 4 3
Cylinder block
66666 66 64
EM-83
Piston
Piston ring
Connecting rod
Bearing
Crankshaft
Va l v e
mecha-
nism Timing chain
55555 55 5EM-45
Camshaft
EM-53
Intake valve timing controlEM-53
Intake valve
3EM-68
Exhaust valve
Revision: April 20092010 QX56

EM-80
< REMOVAL AND INSTALLATION >
ENGINE ASSEMBLY
• Before and during lifting, always check if any harnesses are left connected.
33. Remove the parts that may restrict installation of the engine to the engine stand. NOTE:
This procedure is described assuming that you use an engine stand mounting to the surface to which the
transmission mounts.
a. Before removing the drive plate, put a match mark (A) on the crankshaft and drive plate for alignment during installation.
b. Remove the drive plate. • Holding the crankshaft pulley bolt, lock the crankshaft to remove the drive plate bolts.
• Loosen the bolts diagonally.CAUTION:
• Be careful not to damage the drive plate. Especiallyavoid deforming and damaging of the signal plate teeth
(circumference position).
• Place the drive plate with th e signal plate surface facing
other than downward.
• Keep magnetic materials away from the signal plate.
CAUTION:
Use an engine stand that has a load capacity [a pproximately 240kg (529 lb) or more] large enough
for supporting the engine weight.
• If the load capacity of the stand is not adeq uate, remove the following parts beforehand to
reduce the potential risk of overturning the stand.
- Remove the fuel tube and fuel injector assembly. Refer to EM-40, "
Removal and Installation".
- Remove the intake manifold. Refer to EM-26, "
Removal and Installation".
- Remove the ignition coil. Refer to EM-37, "
Removal and Installation".
- Remove the rocker cover. Refer to EM-38, "
Removal and Installation".
- Other removable brackets.
CAUTION:
Before removing the hanging chains, make sure th e engine stand is stable and there is no risk of
overturning.
34. Remove the generator, if necessary. Refer to CHG-21, "
Removal and Installation".
35. Remove the engine mounting insulator and bracket using power tool, if necessary.
INSTALLATION
Installation is in the reverse order of removal.
ALBIA0522ZZ
KBIA2491E
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EXL-1
DRIVER CONTROLS
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SECTION EXL
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CONTENTS
EXTERIOR LIGHTING SYSTEM
BASIC INSPECTION ....... .............................4
DIAGNOSIS AND REPAIR WORKFLOW ..... .....4
Work Flow ........................................................... ......4
FUNCTION DIAGNOSIS ...............................7
HEADLAMP .................................................... .....7
System Diagram .................................................. ......7
System Description ...................................................7
Component Parts Location ........................................7
Component Description .............................................7
DAYTIME LIGHT SYSTEM .................................9
System Diagram .................................................. ......9
System Description ...................................................9
Component Parts Location ........................................9
Component Description ...........................................10
AUTO LIGHT SYSTEM ......................................11
System Diagram ......................................................11
System Description .................................................11
Component Parts Location ......................................12
Component Description ...........................................12
HEADLAMP AIMING SYSTEM (MANUAL) .......13
System Diagram .................................................. ....13
System Description .................................................13
Component Parts Location ......................................13
Component Description ...........................................13
FRONT FOG LAMP ............................................14
System Diagram .................................................. ....14
System Description .................................................14
Component Parts Location ......................................14
Component Description ...........................................14
TURN SIGNAL AND HAZARD WARNING
LAMPS ...............................................................
15
System Diagram .................................................. ....15
System Description .................................................15
Component Parts Location ......................................15
Component Description ....................................... ....16
PARKING, LICENSE PLATE AND TAIL
LAMPS ..............................................................
17
System Diagram ......................................................17
System Description ..................................................17
Component Parts Location ......................................17
Component Description ...........................................18
DIAGNOSIS SYSTEM (BCM) ...........................19
HEADLAMP ........................................................... ....19
HEADLAMP : CONSULT-III Function (BCM -
HEAD LAMP) ...........................................................
19
FLASHER ............................................................... ....20
FLASHER : CONSULT-III Function (BCM -
FLASHER) ...............................................................
20
COMB SW .............................................................. ....20
COMB SW : CONSULT-III Function (BCM -
COMB SW) ..............................................................
20
DIAGNOSIS SYSTEM (IPDM E/R) ...................22
Diagnosis Description ..............................................22
CONSULT - III Function (IPDM E/R) .......................24
COMPONENT DIAGNOSIS .........................27
POWER SUPPLY AND GROUND CIRCUIT ....27
BCM (BODY CONTROL MODULE) ...................... ....27
BCM (BODY CONTROL MODULE) : Diagnosis
Procedure ............................................................ ....
27
IPDM E/R (INTELLIGENT POWER DISTRIBU-
TION MODULE ENGINE ROOM) .......................... ....
28
IPDM E/R (INTELLIGENT POWER DISTRIBU-
TION MODULE ENGINE ROOM) : Diagnosis Pro-
cedure .................................................................. ....
28
HEADLAMP (HI) CIRCUIT ................................30
Description ...............................................................30
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EXL-2
Component Function Check ...................................30
Diagnosis Procedure - Without Daytime Light Sys-
tem ..........................................................................
30
Diagnosis Procedure - With Daytime Light System
...
31
HEADLAMP (LO) CIRCUIT ...............................33
Description ........................................................... ...33
Component Function Check ...................................33
Diagnosis Procedure - Without Daytime Light Sys-
tem ..........................................................................
33
Diagnosis Procedure - With Daytime Light System
...
34
FRONT FOG LAMP CIRCUIT ...........................36
Description ........................................................... ...36
Component Function Check ...................................36
Diagnosis Procedure ..............................................36
PARKING LAMP CIRCUIT ................................38
Description ........................................................... ...38
Component Function Check ...................................38
Diagnosis Procedure - Without Daytime Light Sys-
tem ..........................................................................
38
Diagnosis Procedure - With Daytime Light System
...
41
TURN SIGNAL LAMP CIRCUIT ........................44
Description ........................................................... ...44
Component Function Check ...................................44
Diagnosis Procedure ..............................................44
OPTICAL SENSOR ...........................................47
Description ..............................................................47
Component Function Check ...................................47
Diagnosis Procedure ..............................................47
HEADLAMP AIMING SWITCH ..........................49
Description ........................................................... ...49
Diagnosis Procedure - Without Daytime Light Sys-
tem ..........................................................................
49
Diagnosis Procedure - With Daytime Light System
...
50
HEADLAMP .......................................................52
Wiring Diagram .................................................... ...52
DAYTIME LIGHT SYSTEM ................................56
Wiring Diagram .................................................... ...56
AUTO LIGHT SYSTEM ......................................62
Wiring Diagram .................................................... ...62
HEADLAMP AIMING SYSTEM (MANUAL) ......69
Wiring Diagram .................................................... ...69
FRONT FOG LAMP SYSTEM ...........................73
Wiring Diagram .................................................... ...73
TURN SIGNAL AND HAZARD WARNING
LAMP SYSTEM .............................................. ...
77
Wiring Diagram .................................................... ...77
PARKING, LICENSE PLATE AND TAIL
LAMPS SYSTEM ...............................................
84
Wiring Diagram .................................................... ...84
STOP LAMP ......................................................91
Wiring Diagram .................................................... ...91
BACK-UP LAMP ............................................ ...95
Wiring Diagram .................................................... ...95
TRAILER TOW .................................................100
Wiring Diagram .....................................................100
ECU DIAGNOSIS ......................................106
BCM (BODY CONTROL MODULE) ............... ..106
Reference Value .................................................. .106
Terminal Layout ....................................................109
Physical Values .....................................................109
Wiring Diagram .....................................................115
Fail Safe ...............................................................119
DTC Inspection Priority Chart .............................120
DTC Index ............................................................120
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) ................
122
Reference Value .................................................. .122
Terminal Layout ....................................................124
Physical Values .....................................................125
Wiring Diagram .....................................................130
Fail Safe ...............................................................133
DTC Index ............................................................135
SYMPTOM DIAGNOSIS ...........................136
EXTERIOR LIGHTING SYSTEM SYMPTOMS ..136
Symptom Table .................................................... .136
NORMAL OPERATING CONDITION ...............138
Description ........................................................... .138
BOTH SIDE HEADLAMPS DO NOT SWITCH
TO HIGH BEAM ................................................
139
Description ........................................................... .139
Diagnosis Procedure .............................................139
BOTH SIDE HEADLAMPS (LO) ARE NOT
TURNED ON .....................................................
140
Description ............................................................140
Diagnosis Procedure .............................................140
PARKING, LICENSE PLATE AND TAIL
LAMPS ARE NOT TURNED ON ......................
141
Description ........................................................... .141
Diagnosis Procedure .............................................141
BOTH SIDE FRONT FOG LAMPS ARE NOT
TURNED ON .....................................................
142
Description ............................................................142
Diagnosis Procedure .............................................142
Revision: April 20092010 QX56

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PRECAUTION ....... .....................................143
PRECAUTIONS .............................................. ..143
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ..
143
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ............................... ..
143
General precautions for service operations ..........144
ON-VEHICLE REPAIR .... ...........................145
ADJUSTMENT AND INSPECTION ................ ..145
HEADLAMP ........................................................... ..145
HEADLAMP : Aiming Adjustment .........................145
FRONT FOG LAMP ............................................... ..146
FRONT FOG LAMP : Aiming Adjustment .............146
REMOVAL AND INSTALLATION .............148
HEADLAMP .................................................... ..148
Bulb Replacement .................................................148
Removal and Installation .......................................149
Disassembly and Assembly ................................ ..149
AUTO LIGHT SYSTEM ....................................151
Removal and Installation .......................................151
FRONT FOG LAMP ........................................152
Bulb Replacement ............................................... ..152
Removal and Installation .......................................152
LIGHTING & TURN SIGNAL SWITCH ...........154
Removal and Installation .......................................154
HAZARD SWITCH ..........................................155
Removal and Installation .......................................155
LICENSE PLATE LAMP .................................156
Bulb Replacement .................................................156
Removal and Installation .......................................156
STOP LAMP ....................................................157
Bulb Replacement .................................................157
Removal and Installation .......................................157
REAR COMBINATION LAMP .........................158
Bulb Replacement .................................................158
Removal and Installation .......................................158
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .......................................... .
159
BULB SPECIFICATIONS ................................159
Headlamp ............................................................ ..159
Exterior Lamp ........................................................159
Revision: April 20092010 QX56

HEADLAMPEXL-7
< FUNCTION DIAGNOSIS >
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FUNCTION DIAGNOSIS
HEADLAMP
System DiagramINFOID:0000000005146604
System DescriptionINFOID:0000000005369868
Control of the headlamp system operation is dependent upon t he position of the combination switch (lighting
and turn signal switch). When the combination switch (lighting and turn signal switch) is placed in the 2nd posi-
tion, the BCM (body control module) receives input requesting the headlamps and park lamps to illuminate.
This input is communicated to the IPDM E/R (intelligent power distribution module engine room) via the CAN
communication lines. The CPU (central processing unit) of the IPDM E/R controls the headlamp LH high,
headlamp RH high and headlamp low relay coils. When energiz ed, these relays direct power to the respective
headlamps, which then illuminate.
Component Parts LocationINFOID:0000000005146606
Component DescriptionINFOID:0000000005146607
XENON HEADLAMP
AWLIA1755GB
1. BCM M18, M20 (view with instrument
panel removed) 2. IPDM E/R E122, E123, E124 3. Combination switch (lighting and turn
signal switch) M28
4. Combination meter M23, M24
AWLIA1625ZZ
Revision: April 20092010 QX56

EXL-8
< FUNCTION DIAGNOSIS >
HEADLAMP
A Xenon type headlamp is adapted to the low beam headlamps. Xenon bulbs do not use a filament. Instead,
they produce light when a high voltage current is pa ssed between two tungsten electrodes through a mixture
of Xenon (an inert gas) and certain other metal halides. In addition to added lighting power, electronic control
of the power supply gives the headlamps stable quality and tone color. Following are some of the advantages
of the Xenon type headlamp.
• The light produced by the headlamps is a white color comparable to sunlight that is easy on the eyes.
• Light output is nearly double that of halogen headlamps, affording increased area of illumination.
• The light features a high relative spectral distribution at wavelengths to which the human eye is most sensi- tive. This means that even in the rain, more light is reflected back from the road surface toward the vehicle,
for added visibility.
• Power consumption is approximately 25 percent less than halogen headlamps, reducing battery load.
HIGH BEAM OPERATION/FLASH-TO-PASS OPERATION
With the combination switch (lighting and turn signal switch) in the 2ND position and placed in HIGH position,
the BCM receives input requesting the headlamp high beams to illuminate. The flash to pass feature can be
used any time and also sends a signal to the BCM. This input is communicated to the IPDM E/R via the CAN
communication lines. The CPU of the combination meter c ontrols the ON/OFF status off the HIGH BEAM indi-
cator. The CPU of the IPDM E/R controls the headlamp high relay coil which supplies power to the high beam
headlamps.
The combination meter receives a high beam request signal (ON) via the CAN communication lines and turns
the high beam indicator lamp ON.
EXTERIOR LAMP BATTERY SAVER CONTROL
With the combination switch (lighting and turn signal switch) in the 2nd position and the ignition switch is
turned from ON or ACC to OFF, the battery saver feature is activated.
Under this condition, the headlamps remain illuminated for 5 minutes unless the lighting switch position is
changed. If the lighting switch position is changed, then the headlamps are turned off.
This setting can be changed by CONSULT-III. Refer to BCS-22, "
HEADLAMP : CONSULT-III Function (BCM -
HEAD LAMP)".
Revision: April 20092010 QX56

EXL-10
< FUNCTION DIAGNOSIS >
DAYTIME LIGHT SYSTEM
Component Description
INFOID:0000000005369870
After starting the engine with the parking brake releas ed and the combination switch (lighting and turn signal
switch) in the OFF or 1ST position, the headlamp high beam automatically turns on at a reduced intensity.
With the combination switch (lighting and turn signal switch) in the 2nd position or with autolamps ON, the
headlamps function the same as conventional light systems.
OPERATION
The BCM monitors inputs from the parking brake swit ch and the combination switch (lighting and turn signal
switch) to determine when to activate the daytime light system. The BCM sends a daytime light request to the
IPDM E/R via the CAN communication lines. The IPDM E/ R grounds the daytime light relay which in turn, pro-
vides power to the ground side of the LH high beam lamp. Power flows backward through the LH high beam
lamp to the IPDM E/R, through the high beam fuses, through the RH high beam lamp circuit to the RH high
beam lamp and on to ground. The high beam lamps are wired in series which causes them to illuminate at a
reduced intensity.
1. IPDM E/R E119, E122, E123, E124 2. BCM M18, M20 (view with instrument
panel removed)3. Daytime light relay E103
4. Combination switch (lighting and turn signal switch) M28 5. Combination meter M23, M24 6. Parking brake switch M11
Revision: April 20092010 QX56

AUTO LIGHT SYSTEMEXL-11
< FUNCTION DIAGNOSIS >
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AUTO LIGHT SYSTEM
System DiagramINFOID:0000000005146612
System DescriptionINFOID:0000000005146613
• BCM (Body Control Module) controls auto light operati on according to signals from optical sensor, combina-
tion switch (lighting and turn signal switch) and ignition switch.
• IPDM E/R (Intelligent Power Distribution Module Engine Room) operates parking, license plate, tail and
headlamps according to CAN communication signals from BCM.
• Optical sensor detects ambient br ightness and converts light (lux) to voltage, then sends the optical sensor
signal to BCM.
OUTLINE
The auto light control system has an optical sensor that detects outside brightness.
When the combination switch (lighting and turn signal switch) is in AUTO position, it automatically turns ON/
OFF the parking, license plate, tail and headlamps in accordance with the ambient light. Sensitivity can be
adjusted in four steps. For the details of the setting, Refer to BCS-22, "
HEADLAMP : CONSULT-III Function
(BCM - HEAD LAMP)".
AWLIA1752GB
Revision: April 20092010 QX56

EXL-12
< FUNCTION DIAGNOSIS >
AUTO LIGHT SYSTEM
Component Parts Location
INFOID:0000000005146614
Component DescriptionINFOID:0000000005146615
AUTO LIGHT OPERATION
The auto light system operates t he low beam and high beam headlamps, parking lamps, tail lamps and license
plate lamps. The BCM monitors the combination switch (lighting and turn signal switch) position as a part of
the BCM combination switch (lighting and turn signal switch) reading function. When the combination switch
(lighting and turn signal switch) is in the AUTO position, the BCM automatically turns the lamps ON/OFF
according to ambient light brightness.
NOTE:
Timing for when lamps turn ON/OFF can be changed by the function setting of CONSULT-III. Refer to BCS-22,
"HEADLAMP : CONSULT-III Function (BCM - HEAD LAMP)".
1. BCM M18, M19, M20 (view with instru-
ment panel removed) 2. IPDM E/R E122, E123, E124 3. Optical sensor M302
4. Front door switch LH B8
RH B108 5. Rear door switch
LH B18
RH B116 6. Back door latch (door ajar switch)
D503
7. Combination switch (lighting and turn signal switch) M28
AWLIA1627ZZ
Revision: April 20092010 QX56