2010 INFINITI QX56 wiring

DEF-12
< COMPONENT DIAGNOSIS >
DOOR MIRROR DEFOGGER LH
DOOR MIRROR DEFOGGER LH
DescriptionINFOID:0000000005146834
Heats the heating wire with the power supply from the rear window defogger relay to prevent the door mirror
from fogging up.
Component Function CheckINFOID:0000000005146835
1. CHECK DOOR MIRROR DEFOGGER LH
Check that heating wire of door mirror defogger LH is heated when turning the rear window defogger switch
ON.
Is the inspection result normal?
YES >> Door mirror defogger is OK.
NO >> Refer to DEF-12, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005146836
Regarding Wiring Diagram information, refer to DEF-27, "Wiring Diagram".
1. CHECK POWER SUPPLY
Check if the following fuse in the IPDM E/R is blown.
Is the inspection result normal?
YES >> GO TO 2
NO >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.
2. CHECK DOOR MIRROR DE FOGGER POWER SUPPLY CIRCUIT
Check voltage between IPDM E/R connector and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Replace IPDM E/R. Refer to PCS-35, "
Removal and Installation of IPDM E/R".
3. CHECK DOOR MIRROR DEFOGGER POWER SUPPLY CIRCUIT 2
1. Turn ignition switch OFF.
2. Disconnect door mirror LH.
3. Turn ignition switch ON.
4. Check voltage between door mirror LH connector and ground.
COMPONENT PARTS AMPEREFUSE NO.
IPDM E/R 15A43
ConnectorTe r m i n a l
ConditionVoltage (V)
(Approx.)
(+) (-)
E120 23 Ground Rear window defogger
switch ON
Battery voltage
Rear window defogger
switch OFF 0
LIIA2049E
ConnectorTe r m i n a l
ConditionVoltage (V)
(Approx.)
(+) (-)
LIIA1456E
Revision: April 20092010 QX56

DOOR MIRROR DEFOGGER RHDEF-15
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
K
M A
B
DEF
N
O P
DOOR MIRROR DEFOGGER RH
DescriptionINFOID:0000000005146838
Heats the heating wire with the power supply from t he rear window defogger relay to prevent the door mirror
from fogging up.
Component Function CheckINFOID:0000000005146839
1.CHECK DOOR MIRROR DEFOGGER RH
Check that the heating wire of door mirror defogger RH is heated when turning the rear window defogger
switch ON.
Is the inspection result normal?
YES >> Door mirror defogger RH is OK.
NO >> Refer to DEF-15, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005146840
Regarding Wiring Diagram information, refer to DEF-27, "Wiring Diagram".
1. CHECK POWER SUPPLY
Check if the following fuse in the IPDM E/R is blown.
Is the inspection result normal?
YES >> GO TO 2
NO >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.
2. CHECK DOOR MIRROR DEFOGGER POWER SUPPLY CIRCUIT
Check voltage between IPDM E/R connector and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Replace IPDM E/R. Refer to PCS-35, "
Removal and Installation of IPDM E/R".
3. CHECK DOOR MIRROR DEFOGGER POWER SUPPLY CIRCUIT 2
1. Turn ignition switch OFF.
2. Disconnect door mirror RH.
3. Turn ignition switch ON.
4. Check voltage between door mirror RH connector and ground.
COMPONENT PARTS AMPEREFUSE NO.
IPDM E/R 15A43
ConnectorTe r m i n a l
ConditionVoltage (V)
(Approx.)
(+) (-)
E120 23 Ground Rear window defogger
switch ON
Battery voltage
Rear window defogger
switch OFF 0
LIIA2049E
ConnectorTe r m i n a l
ConditionVoltage (V)
(Approx.)
(+) (-)
LIIA1456E
Revision: April 20092010 QX56

BCM (BODY CONTROL MODULE)DEF-27
< ECU DIAGNOSIS >
C
DE
F
G H
I
J
K
M A
B
DEF
N
O P
Wiring DiagramINFOID:0000000005146845
ABLWA0514GB
Revision: April 20092010 QX56

PRECAUTIONSDEF-43
< PRECAUTION >
C
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F
G H
I
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M A
B
DEF
N
O P
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005367609
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:0000000005367612
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecti ng both battery cables with the ignition knob in the
″ LOCK ″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS , an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, 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. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
Revision: April 20092010 QX56

DLK-4
Diagnosis Procedure .............................................138
BACK DOOR CLOSE SWITCH SYSTEM .......139
Diagnosis Procedure ........................................... ..139
BACK DOOR SWITCH ....................................140
Diagnosis Procedure ........................................... ..140
CINCH LATCH MOTOR SYSTEM ...................141
Diagnosis Procedure ........................................... ..141
INTELLIGENT KEY UNIT POWER BACK
DOOR INPUT SIGNAL ....................................
142
Description ........................................................... ..142
Diagnosis Procedure .............................................142
INTELLIGENT KEY UNIT POWER BACK
DOOR OUTPUT SIGNAL ................................
143
Description ........................................................... ..143
Diagnosis Procedure .............................................143
HOMELINK UNIVERSAL TRANSCEIVER ......144
Wiring Diagram .................................................... ..144
Description .............................................................145
Component Function Check ................................146
Diagnosis Procedure .............................................146
ECU DIAGNOSIS ..................................... ..148
BCM (BODY CONTROL MODULE) ............... .148
Reference Value .................................................. ..148
Terminal Layout .....................................................151
Physical Values .....................................................151
Wiring Diagram — POWER DOOR LOCK SYS-
TEM — ..................................................................
157
Fail Safe ................................................................170
DTC Inspection Priority Chart .............................171
DTC Index ........................................................... ..171
INTELLIGENT KEY UNIT ................................173
Reference Value .................................................. ..173
Terminal Layout - Intelligent Key Unit ....................174
Physical Values - Intelligent Key Unit ....................174
Terminal Layout - Steering Lock Solenoid ........... ..177
Physical Values - Steering Lock Solenoid .............177
Wiring Diagram — INTELLIGENT KEY SYSTEM
— ...........................................................................
178
Fail Safe ................................................................195
DTC Inspection Priority Chart .............................196
DTC Index ........................................................... ..196
BACK DOOR CONTROL UNIT .......................197
Reference Value .................................................. ..197
Wiring Diagram—AUTOMATIC BACK DOOR
SYSTEM— ............................................................
199
Fail Safe .............................................................. ..209
SYMPTOM DIAGNOSIS ............................210
INTELLIGENT KEY SYSTEM SYMPTOMS ... .210
Symptom Table ................................................... ..210
DOOR LOCK FUNCTION SYMPTOMS ...........211
DOOR LOCK AND UNLOCK SWITCH .................. .211
DOOR LOCK AND UNLOCK SWITCH : Symptom
Table .....................................................................
211
INTELLIGENT KEY ................................................ .212
INTELLIGENT KEY : Symptom Table ..................212
BACK DOOR OPENER FUNCTION ................214
BACK DOOR OPENER SWITCH .......................... .214
BACK DOOR OPENER SWITCH : Symptom Ta-
ble ........................................................................ .
214
BACK DOOR HANDLE .......................................... .214
BACK DOOR HANDLE : Symptom Table .............215
INTELLIGENT KEY ................................................ .215
INTELLIGENT KEY : Symptom Table ..................215
WARNING FUNCTION SYMPTOMS ...............216
Symptom Table .................................................... .216
KEY REMINDER FUNCTION SYMPTOMS .....219
Symptom Table .................................................... .219
HAZARD FUNCTION ..................................... ..220
Symptom Table .................................................... .220
HORN FUNCTION ............................................221
Symptom Table .................................................... .221
HOMELINK UNIVERSAL TRANSCEIVER ......222
Symptom Table .................................................... .222
SQUEAK AND RATTLE TROUBLE DIAG-
NOSES ..............................................................
223
Work Flow ............................................................ .223
Inspection Procedure ............................................225
Diagnostic Worksheet ...........................................227
PRECAUTION ...........................................229
PRECAUTIONS .............................................. ..229
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. .
229
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ................................
229
Precaution for work ...............................................230
PREPARATION .........................................231
PREPARATION .............................................. ..231
Special Service Tool ............................................ .231
Commercial Service Tool ......................................232
ON-VEHICLE REPAIR ..............................233
HOOD ............................................................. ..233
Fitting Adjustment ................................................ .233
Removal and Installation of Hood Assembly ........234
Revision: April 20092010 QX56

DLK-58
< COMPONENT DIAGNOSIS > [WITH
INTELLIGE NT KEY SYSTEM]
U1000 CAN COMM CIRCUIT
CO MPONENT DIAGNOSIS
U1000 CAN COMM CIRCUIT
Descr iptionINFOID:0 000000005146905
CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
v ehicle is equipped with many ele ct ronic control uni t, and each control unit shares information and links with
other control units during operation (not independent). In CAN communicat ion, control units are connected
wi
th 2 communication lines (CAN H-line, CAN L-line) allowing a high rate of inf ormation transmission with less
wiring
. Each control unit transmits/receives data but selectively reads required data only.
CAN
Communication Signal Chart. Refer to LAN-44, "CAN Communication Signal Chart".
DTC LogicINFOID:0 000000005146906
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0 000000005146907
1.PERFORM SELF DIAGNOSTIC
1.T urn ignition switch ON and wait for 2 second or more.
2. Check “S elf Diagnostic Res ult”.
Is“CAN CO MM CIRCUIT” displayed?
YES>> Refer to LAN-14, " TroubleDiagnosisF low Chart".
NO>> Refer to GI-38, "Intermittent Incident".
DTC CONSULT
-III displa y
description DTC Detection ConditionPossible cause
U100
0C AN COMM CIRCUIT
W hen BCM can not communicate CAN com-
munication s ignal continuously for 2 sec-
onds o r more.
In CAN communication s ystem, any item (or item s)
of the following listed below is malfunctio ning.
•Transmission
•Receiving (ECM)
•R eceiving (VDC/TCS/AB S)
•Receiving (METER/M& A)
•Receiving (TCM)
•Rec eiving (MULTI A V)
•Receiving (IPDM E/R)
Revision: April 2009 2010 QX56

DLK-60
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
CENTER CONSOLE AREA ANTENNA (REAR)
CENTER CONSOLE AREA ANTENNA (REAR)
DescriptionINFOID:0000000005146911
Detects whether Intelligent Key is inside the vehicle.
Component Function CheckINFOID:0000000005146912
1.CHECK INSIDE KEY ANTENNA INPUT SIGNAL
With CONSULT-III
1. Check “ANTENNA” in “Active Test” mode with CONSULT-III.
2. Touch “ROOM ANT1”.
3. When Intelligent Key is in center console area antenna (rear) detection area, hazard lamps flash.
Is the inspection result normal?
YES >> Center console area antenna (rear) is OK.
NO >> Refer to DLK-60, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005146913
Regarding Wiring Diagram information, refer to DLK-178, "Wiring Diagram — INTELLIGENT KEY SYSTEM —
".
1.CHECK INSIDE KEY ANTENNA POWER SUPPLY SIGNAL
1. Turn ignition switch OFF.
2. Check signal between Intelligent Key unit connector and ground with an oscilloscope.
Is the inspection result normal?
YES >> Center console area antenna (rear) is OK.
NO >> GO TO 2
2.CHECK INSIDE KEY ANTENNA
1. Disconnect Intelligent Key unit connector and center console area antenna (rear) connectors.
2. Check continuity between Intelligent Key unit harnes s connector (A) M70 terminals 15, 16 and center con-
sole area antenna (rear) harness connector (B) M209 terminals 1, 2.
Test Item Condition Possible cause
ROOM ANT1 An excessive high or low voltage from inside
antenna is sent to the Intelligent Key Unit • Center console area antenna (rear)
• Between Intelligent Key unit and center console area an-
tenna (rear)
Connector Item Te r m i n a l s
Condition Signal (V)
(Reference value)
(+) (–)
M70 Intelligent
Key unit 15 Ground Ignition
switch is
pushed.
ALKIA0585ZZPIIB7441E
Revision: April 20092010 QX56

DLK-62
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
LUGGAGE AREA ANTENNA
LUGGAGE AREA ANTENNA
DescriptionINFOID:0000000005146914
Detects whether Intelligent Key is inside the vehicle.
Component Function CheckINFOID:0000000005146915
1.CHECK INSIDE KEY ANTENNA INPUT SIGNAL
With CONSULT-III
1. Check “ANTENNA” in “Active Test” mode with CONSULT-III.
2. Touch “ROOM ANT1”.
3. When Intelligent Key is in luggage area antenna detection area, hazard lamps flash.
Is the inspection result normal?
YES >> Luggage area antenna is OK.
NO >> Refer to DLK-62, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005146916
Regarding Wiring Diagram information, refer to DLK-178, "Wiring Diagram — INTELLIGENT KEY SYSTEM —
".
1.CHECK INSIDE KEY ANTENNA POWER SUPPLY SIGNAL
1. Turn ignition switch OFF.
2. Check signal between Intelligent Key unit connector and ground with an oscilloscope.
Is the inspection result normal?
YES >> Luggage area antenna is OK.
NO >> GO TO 2
2.CHECK INSIDE KEY ANTENNA
1. Disconnect Intelligent Key unit connector and luggage area antenna connectors.
2. Check continuity between Intelligent Key unit harness connector (A) M70 terminals 35, 36 and luggage
area antenna harness connector (B) B76 terminals 1, 2.
Test Item Condition Possible cause
ROOM ANT1 An excessive high or low voltage from inside
antenna is sent to the Intelligent Key Unit • Luggage area antenna
• Between Intelligent Key unit and luggage area antenna
Connector Item
Te r m i n a l s
Condition Signal (V)
(Reference value)
(+) (–)
M70 Intelligent
Key unit 35 Ground Ignition
switch is
pushed.
ALKIA0587ZZPIIB7441E
Revision: April 20092010 QX56