sensor INFINITI QX56 2009 Factory Service Manual

EXL-2
IPDM E/R (INTELLIGENT POWER DISTRIBU-
TION MODULE ENGINE ROOM) : Diagnosis Pro-
cedure .....................................................................
31
HEADLAMP (HI) CIRCUIT ................................32
Description ........................................................... ...32
Component Function Check ...................................32
Diagnosis Procedure - Without Daytime Light Sys-
tem ..........................................................................
32
Diagnosis Procedure - With Daytime Light System
...
33
HEADLAMP (LO) CIRCUIT ...............................35
Description ........................................................... ...35
Component Function Check ...................................35
Diagnosis Procedure - Without Daytime Light Sys-
tem ..........................................................................
35
Diagnosis Procedure - With Daytime Light System
...
36
FRONT FOG LAMP CIRCUIT ...........................38
Description ........................................................... ...38
Component Function Check ...................................38
Diagnosis Procedure ..............................................38
PARKING LAMP CIRCUIT ................................40
Description ........................................................... ...40
Component Function Check ...................................40
Diagnosis Procedure - Without Daytime Light Sys-
tem ..........................................................................
40
Diagnosis Procedure - With Daytime Light System
...
42
TURN SIGNAL LAMP CIRCUIT ........................46
Description ........................................................... ...46
Component Function Check ...................................46
Diagnosis Procedure ..............................................46
OPTICAL SENSOR ...........................................49
Description ..............................................................49
Component Function Check ...................................49
Diagnosis Procedure ..............................................49
HEADLAMP AIMING SWITCH ..........................51
Description ........................................................... ...51
Diagnosis Procedure - Without Daytime Light Sys-
tem ..........................................................................
51
Diagnosis Procedure - With Daytime Light System
...
52
HEADLAMP .......................................................53
Wiring Diagram .................................................... ...53
DAYTIME LIGHT SYSTEM ................................57
Wiring Diagram .................................................... ...57
AUTO LIGHT SYSTEM ......................................64
Wiring Diagram .................................................... ...64
HEADLAMP AIMING SYSTEM (MANUAL) ......71
Wiring Diagram .................................................... ...71
FRONT FOG LAMP SYSTEM ...........................75
Wiring Diagram .................................................... ...75
TURN SIGNAL AND HAZARD WARNING
LAMP SYSTEM .............................................. ...
78
Wiring Diagram .................................................... ...78
PARKING, LICENSE PLATE AND TAIL
LAMPS SYSTEM ...............................................
85
Wiring Diagram .................................................... ...85
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 ....................................................108
Physical Values .....................................................108
Wiring Diagram .....................................................114
Fail Safe ...............................................................118
DTC Inspection Priority Chart .............................119
DTC Index ............................................................119
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) ................
121
Reference Value .................................................. .121
Terminal Layout ....................................................123
Physical Values .....................................................123
Wiring Diagram .....................................................128
Fail Safe ...............................................................131
DTC Index ............................................................133
SYMPTOM DIAGNOSIS ...........................134
EXTERIOR LIGHTING SYSTEM SYMPTOMS ..134
Symptom Table .................................................... .134
NORMAL OPERATING CONDITION ...............136
Description ........................................................... .136
BOTH SIDE HEADLAMPS DO NOT SWITCH
TO HIGH BEAM ................................................
137
Description ........................................................... .137
Diagnosis Procedure .............................................137
BOTH SIDE HEADLAMPS (LO) ARE NOT
TURNED ON .....................................................
138
Description ............................................................138
Diagnosis Procedure .............................................138
PARKING, LICENSE PLATE AND TAIL
LAMPS ARE NOT TURNED ON ......................
139
Description ........................................................... .139
Revision: December 20092009 QX56

AUTO LIGHT SYSTEMEXL-11
< FUNCTION DIAGNOSIS >
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AUTO LIGHT SYSTEM
System DiagramINFOID:0000000005867516
System DescriptionINFOID:0000000003776153
• BCM (Body Control Module) controls auto light operati on according to signals from optical sensor, lighting
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 lighting switch is in AUTO position, it automat ically 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 EXL-22, "
HEADLAMP : CONSULT-III F unction (BCM - HEAD LAMP)".
AWLIA1752GB
Revision: December 20092009 QX56

EXL-12
< FUNCTION DIAGNOSIS >
AUTO LIGHT SYSTEM
Component Parts Location
INFOID:0000000003776154
Component DescriptionINFOID:0000000003776155
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 lighting switch (com bination switch) position as a part of the BCM combi-
nation switch reading function. When the lighting 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 EXL-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 M28
AWLIA1627ZZ
Revision: December 20092009 QX56

OPTICAL SENSOREXL-49
< COMPONENT DIAGNOSIS >
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OPTICAL SENSOR
DescriptionINFOID:0000000003776193
The optical sensor converts the outside brightness (lux) to voltage and transmits the optical sensor signal to
the BCM.
Component Function CheckINFOID:0000000003776194
1.CHECK OPTICAL SENSOR SIGNAL BY CONSULT-III
CONSULT-III
1. Turn the ignition switch ON.
2. Select "OPTICAL SENSOR" of BC M (HEAD LAMP) DATA MONITOR item.
3. Turn the lighting switch to AUTO.
4. With the optical sensor illuminat ing, check the monitor status.
*: Illuminates the optical sensor. The value may be less than the standard value if brightness is weak.
Is the item status normal?
YES >> Optical sensor is normal.
NO >> Refer to EXL-49, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003776195
1.CHECK OPTICAL SENSOR GROUND CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect BCM connector M18 and optical sensor connector M302.
3. Check continuity between BCM harness connector M18 (A) ter-
minal 18 and optical sensor harness connector M302 (B) termi-
nal 3.
4. Check continuity between BCM harness connector M18 (A) ter- minal 18 and ground.
Are continuity test results as specified?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK OPTICAL SENSOR SIGNAL CIRCUIT
Monitor item ConditionVoltage
OPTICAL SENSOR When illuminating
3.1V or more *
When shutting off light 0.6V or less
AB
Connector Terminal Connector Terminal Continuity M181 8M3023 Y es
A —Contin u it y
Connector Terminal
M18 18Ground No
AWLIA1620ZZ
Revision: December 20092009 QX56

EXL-50
< COMPONENT DIAGNOSIS >
OPTICAL SENSOR
1. Check continuity between BCM harness connector M20 (A) ter-minal 58 and optical sensor harness connector M302 (B) termi-
nal 4.
2. Check continuity between BCM harness connector M20 (A) ter- minal 58 and ground.
Are the continuity test results as specified?
YES >> Replace the optical sensor. Refer to EXL-149, "Removal and Installation".
NO >> Repair harness or connector.
AB
Connector Terminal Connector Terminal Continuity M20 58M302 4Yes
A —Continuity
Connector Terminal
M20 58Ground No
AWLIA1621ZZ
Revision: December 20092009 QX56

BCM (BODY CONTROL MODULE)EXL-109
< ECU DIAGNOSIS >
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Te r m i n a l Wire
color Signal name Signal
input/
output Measuring condition
Reference value or waveform
(Approx.)
Ignition
switch Operation or condition
1BR/W Ignition keyhole illumi-
nation Output OFFDoor is locked (SW OFF)
Battery voltage
Door is unlocked (SW ON) 0V
2SB Combination switch
input 5 Input ON
Lighting, turn, wiper OFF
Wiper dial position 4
3G/Y Combination switch
input 4 Input ONLighting, turn, wiper OFF
Wiper dial position 4
4Y Combination switch
input 3 Input ON
Lighting, turn, wiper OFF
Wiper dial position 4
5G/B Combination switch
input 2
Input ONLighting, turn, wiper OFF
Wiper dial position 4
6V Combination switch
input 1
9GR/R Rear window defogger
switch
Input ONRear window defogger switch
ON
0V
Rear window defogger switch
OFF 5V
10 G Hazard lamp flash Input OFF ON (opening or closing)
0V
OFF (other than above) Battery voltage
11 O Ignition switch (ACC
or ON)
InputACC or
ON Ignition switch ACC or ON
Battery voltage
12 R/L Front door switch RH Input OFF ON (open)
0V
OFF (closed) Battery voltage
13 GR Rear door switch RH Input OFF ON (open)
0V
OFF (closed) Battery voltage
15 L/W Tire pressure warning
check connector
Input OFF
—5V
18 P Remote keyless entry
receiver and optical
sensor (ground)
Output OFF
—0V
SKIA5291E
SKIA5292E
SKIA5291E
SKIA5292E
Revision: December 20092009 QX56

BCM (BODY CONTROL MODULE)EXL-113
< ECU DIAGNOSIS >
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58 W/R Optical sensor Input ONWhen optical sensor is illumi-
nated
3.1V or more
When optical sensor is not illu-
minated 0.6V or less
59 G Front door lock as-
sembly LH actuator
(unlock) Output OFF
OFF (neutral)
0V
ON (unlock) Battery voltage
60 G/B Turn signal (left) Output ON Turn left ON
61 G/Y Turn signal (right) Output ON Turn right ON
62 R/W Step lamp LH and RH Output OFF ON (any door open)
0V
OFF (all doors closed) Battery voltage
63 L Interior room/map
lamp Output OFFAny door
switchON (open)
0V
OFF (closed) Battery voltage
65 V All door lock actuators
(lock) Output OFFOFF (neutral)
0V
ON (lock) Battery voltage
66 G/Y Front door lock actua-
tor RH, rear door lock
actuators LH/RH and
back door lock actua-
tor (unlock) Output OFF
OFF (neutral)
0V
ON (unlock) Battery voltage
67 B Ground Input ON—0V
68 W/L Power window power
supply (RAP) Output —Ignition switch ON
Battery voltage
Within 45 seconds after igni-
tion switch OFF Battery voltage
More than 45 seconds after ig-
nition switch OFF 0V
When front door LH or RH is
open or power window timer
operates 0V
69 W/R Power window power
supply
Output —
—Battery voltage
70 W/B Battery power supply Input OFF —Battery voltage
Te r m i n a l
Wire
color Signal name Signal
input/
output Measuring condition
Reference value or waveform
(Approx.)
Ignition
switch Operation or condition
SKIA3009J
SKIA3009J
Revision: December 20092009 QX56

EXL-134
< SYMPTOM DIAGNOSIS >
EXTERIOR LIGHTING SYSTEM SYMPTOMS
SYMPTOM DIAGNOSIS
EXTERIOR LIGHTING SYSTEM SYMPTOMS
Symptom TableINFOID:0000000003776210
CAUTION:
Perform the self-diagnosis with CONSULT-III before the symptom diagnosis. Perform the trouble diag-
nosis if any DTC is detected.
Symptom Possible causeInspection item
Headlamp does not
switch to the high beam. One side•Fuse
• Harness between IPDM E/R
and the front combination lamp
• Front combination lamp
(High beam relay)
• IPDM E/R Headlamp (HI) circuit
Refer to EXL-32
.
Both sides Symptom diagnosis
"BOTH SIDE HEADLAMPS DO NOT SWITCH TO HIGH BEAM"
Refer to
EXL-137
.
High beam indicator lamp is not turned ON.
(Headlamp switches to the high beam.) • Combination meter
•BCM• Combination meter.
Data monitor "HI-BEAM IND".
• BCM (HEAD LAMP) Active test "HEADLAMP".
Headlamp does not
switch to the low beam. One side
Front combination lamp (Low
beam relay)
—
Both sides • Combination switch
• Harness between the combina-
tion switch and BCM
•BCM Combination switch
Refer to BCS-36
.
High beam request signal
•BCM
• IPDM E/R IPDM E/R
Data monitor "HL HI REQ".
IPDM E/R —
Headlamp does not turn
ON. One side•Fuse
•Bulb
• Harness between IPDM E/R
and the front combination lamp
• Front combination lamp
• IPDM E/R Headlamp (L
O) circuit
Refer to EXL-35
.
Both sides Symptom diagnosis
"BOTH SIDE HEADLAMPS (LO) ARE NOT TURNED ON"
Refer to
EXL-138, "
Description".
Headlamp does not turn
OFF. When the ignition
switch is turned ON
•BCM
• Combination switch Combination switch
Refer to BCS-36
.
The ignition switch is
turned OFF (After acti-
vating the battery sav-
er). IPDM E/R
—
Headlamp is not turned ON/OFF with the lighting
switch AUTO. • Combination switch
• Harness between the combina-
tion switch and BCM
•BCM Combination switch
Refer to BCS-36
.
• Optical sensor
• Harness between the optical sensor and BCM
•BCM Optical sensor
Refer to EXL-49
.
Revision: December 20092009 QX56

PRECAUTIONSEXL-141
< PRECAUTION >
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005864677
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoper ative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipm ent on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Un it or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or el ectric power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the battery, and wait at least 3 minutes before performing any service.
Precaution Necessary for Steering Wheel Rotation After Battery Disconnect
INFOID:0000000005864678
NOTE:
• Before removing and installing any control units, first tu rn the push-button ignition switch to the LOCK posi-
tion, then disconnect both battery cables.
• After finishing work, confirm that all control unit connectors are connected properly, then re-connect both
battery cables.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If a DTC is detected, perform trouble diagnos is according to self-diagnosis results.
This vehicle is equipped with a push-button ignition switch and a steering lock unit.
If the battery is disconnect ed or discharged, the steering wheel will lock and cannot be turned.
If turning the steering wheel is required with the battery disconnected or discharged, follow the procedure
below before starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.
2. Carry the Intelligent Key or insert it to the key slot and turn the push-button ignition switch to ACC position. (At this time, the steering lock will be released.)
3. Disconnect both battery cables. The steering lock will remain released with both battery cables discon- nected and the steering wheel can be turned.
4. Perform the necessary repair operation.
Revision: December 20092009 QX56

AUTO LIGHT SYSTEMEXL-149
< REMOVAL AND INSTALLATION >
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AUTO LIGHT SYSTEM
Removal and InstallationINFOID:0000000003776225
OPTICAL SENSOR
Removal
1. Remove defroster grille. Refer to IP-12, "Exploded View".
2. Disconnect the optical sensor connector.
3. Turn the optical sensor counterclockwise to remove it from defroster grille.
Installation
Installation is in the reverse order of removal.
WKIA1061E
Revision: December 20092009 QX56