wiring INFINITI QX56 2010 Factory Service Manual

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

DLK-64
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
CENTER CONSOLE AREA ANTENNA (FRONT)
CENTER CONSOLE AREA ANTENNA (FRONT)
DescriptionINFOID:0000000005146917
Detects whether Intelligent Key is inside the vehicle.
Component Function CheckINFOID:0000000005146918
1.CHECK INSIDE KEY ANTENNA INPUT SIGNAL
With CONSULT-III
1. Check “ANTENNA” in “Active Test” mode with CONSULT-III.
2. Touch “ROOM ANT2”.
3. When Intelligent Key is in center console area antenna (front) detection area, hazard lamps flash.
Is the inspection result normal?
YES >> Center console area antenna (front) is OK.
NO >> Refer to DLK-64, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005146919
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 (front) is OK.
NO >> GO TO 2
2.CHECK INSIDE KEY ANTENNA
1. Disconnect Intelligent Key unit connector and c enter console area antenna (front) connectors.
2. Check continuity between Intelligent Key unit harnes s connector (A) M70 terminals 13, 14 and center con-
sole area antenna (front) harness connector (B) M210 terminals 1, 2.
Test Item Condition Possible cause
ROOM ANT2 An excessive high or low voltage from inside
antenna is sent to the Intelligent Key Unit • Center console area antenna (front)
• Between Intelligent Key unit and center console area an-
tenna (front)
Connector Item Te r m i n a l s
Condition Signal (V)
(Reference value)
(+) (–)
M70 Intelligent
Key unit 13 Ground Ignition
switch is
pushed.
ALKIA0583ZZPIIB7441E
Revision: April 20092010 QX56

DLK-66
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
OVERHEAD CONSOLE AREA ANTENNA
OVERHEAD CONSOLE AREA ANTENNA
DescriptionINFOID:0000000005146920
Detects whether Intelligent Key is inside the vehicle.
Component Function CheckINFOID:0000000005146921
1.CHECK INSIDE KEY ANTENNA INPUT SIGNAL
With CONSULT-III
1. Check “ANTENNA” in “Active Test” mode with CONSULT-III.
2. Touch “ROOM ANT2”.
3. When Intelligent Key is in overhead consol e area antenna detection area, hazard lamps flash.
Is the inspection result normal?
YES >> Overhead console area antenna is OK.
NO >> Refer to DLK-66, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005146922
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 >> Overhead console area antenna is OK.
NO >> GO TO 2
2.CHECK INSIDE KEY ANTENNA
1. Disconnect Intelligent Key unit connector and overhead console area antenna connectors.
2. Check continuity between Intelligent Key unit harness connector (A) M70 terminals 33, 34 and overhead console area antenna harness connector (B) R210 terminals 1, 2.
Test Item Condition Possible cause
ROOM ANT2 An excessive high or low voltage from inside
antenna is sent to the Intelligent Key Unit • Overhead console area antenna
• Between Intelligent Key unit and overhead console area
antenna
Connector Item Te r m i n a l s
Condition Signal (V)
(Reference value)
(+) (–)
M70 Intelligent
Key unit 33 Ground Ignition
switch is
pushed.
ALKIA0589ZZPIIB7441E
Revision: April 20092010 QX56

DLK-68
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
INTELLIGENT KEY UNIT
INTELLIGENT KEY UNIT
: Diagnosis ProcedureINFOID:0000000005146923
Regarding Wiring Diagram information, refer to DLK-178, "Wiring Diagram — INTELLIGENT KEY SYSTEM —
".
1.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit connector.
3. Check voltage between Intelligent Key unit harness connector M70 terminals 6, 11 and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> Repair or replace Intelligent Key unit power supply circuit.
2.CHECK GROUND CIRCUIT
Check continuity between Intelligent Key unit harness connector
M70 terminal 12 and ground.
Is the inspection result normal?
YES >> Power supply and ground circuits are OK.
NO >> Repair or replace the Intelligent Key unit ground circuit.
BCM (BODY CONTROL MODULE)
BCM (BODY CONTROL MODULE) : Diagnosis ProcedureINFOID:0000000005380580
Regarding Wiring Diagram information, refer to BCS-49, "Wiring Diagram".
1. CHECK FUSES AND FUSIBLE LINK
Check that the following fuses and fusible link are not blown.
Is the fuse blown?
Connector Terminals Ignition switch position
M70 (+) (–) OFF
ON
6 Ground 0V Battery voltage
11 Battery voltage Battery voltage
WIIA1171E
12 - Ground : Continuity should exist.
WIIA1172E
Terminal No. Signal nameFuses and fusible link No.
57 Battery power supply 22 (15A)
70 F (50A)
11 Ignition ACC or ON 4 (10A)
38 Ignition ON or START 59 (10A)
Revision: April 20092010 QX56

POWER SUPPLY AND GROUND CIRCUITDLK-69
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
C
D
E
F
G H
I
J
L
M A
B
DLK
N
O P
YES >> Replace the blown fuse or fusible link after repairing the affected circuit.
NO >> GO TO 2
2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM.
3. Check voltage between BCM harness connector and ground.
Is the measurement value normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3. CHECK GROUND CIRCUIT
Check continuity between BCM harness connector and ground.
Does continuity exist?
YES >> Inspection End.
NO >> Repair or replace harness.
BACK DOOR CONTROL UNIT
BACK DOOR CONTROL UNIT : Diagnosis ProcedureINFOID:0000000005146925
Regarding Wiring Diagram information, refer to DLK-199, "Wiring Diagram—AUTOMATIC BACK DOOR SYS-
TEM—".
1.BACK DOOR POWER SUPPLY CIRCUIT INSPECTION
1. Turn ignition switch OFF.
2. Disconnect back door control unit connector.
Connector Te r m i n a l s
Power
source Condition Voltage (V) (Ap-
prox.)
(+) (-)
M18 11 Ground
ACC
power
supply Ignition
switch
ACC or
ON Battery voltage
38 Ground Ignition
power
supply Ignition
switch ON or START Battery voltage
M20 57 Ground
Battery
power
supply Ignition
switch OFF Battery voltage
70 Ground Battery
power
supply Ignition
switch
OFF Battery voltage
LIIA2415E
BCM
GroundContinuity
Connector Terminal
M20 67 Yes
LIIA0915E
Revision: April 20092010 QX56

DOOR SWITCHDLK-71
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
C
D
E
F
G H
I
J
L
M A
B
DLK
N
O P
DOOR SWITCH
DescriptionINFOID:0000000005146926
Detects door open/close condition.
Component Function CheckINFOID:0000000005146927
1.CHECK FUNCTIONWith CONSULT-III
Check door switches in data monitor mode with CONSULT-III.
Is the inspection result normal?
YES >> Door switch is OK.
NO >> Refer to DLK-71, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005146928
Regarding Wiring Diagram information, refer to DLK-157, "Wiring Diagram — POWER DOOR LOCK SYS-
TEM —".
1.CHECK DOOR SWITCHES INPUT SIGNAL
With CONSULT-III
Check door switches ("DOOR SW-DR", "DOOR SW-AS", "DOOR SW-RL", "DOOR SW-RR", "BACK DOOR
SW") in DATA MONITOR mode with CONSULT–III.
• When doors are open:
• When doors are closed:
Without CONSULT-III
Check voltage between BCM connector M18 or M19 terminals 12, 13, 43, 47, 48 and ground.
Monitor item Condition
DOOR SW-DR
CLOSE → OPEN: OFF → ON
DOOR SW-AS
DOOR SW-RL
DOOR SW-RR
BACK DOOR SW
DOOR SW-DR :ON
DOOR SW-AS :ON
DOOR SW-RL :ON
DOOR SW-RR :ON
BACK DOOR SW :ON
DOOR SW-DR :OFF
DOOR SW-AS :OFF
DOOR SW-RL :OFF
DOOR SW-RR :OFF
BACK DOOR SW :OFF
Revision: April 20092010 QX56

DLK-74
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
DOOR LOCK AND UNLOCK SWITCH
DOOR LOCK AND
UNLOCK SWITCH
DRIVER SIDE
DRIVER SIDE : DescriptionINFOID:0000000005146929
Transmits door lock/unlock operation to BCM.
DRIVER SIDE : Component Function CheckINFOID:0000000005146930
1.CHECK FUNCTION
With CONSULT-III
Check CDL LOCK SW, CDL UNLOCK SW in Data Monitor mode with CONSULT-III.
Is the inspection result normal?
YES >> Door lock and unlock switch is OK.
NO >> Refer to DLK-74, "
DRIVER SIDE : Diagnosis Procedure".
DRIVER SIDE : Diagnosis ProcedureINFOID:0000000005146931
Regarding Wiring Diagram information, refer to DLK-157, "Wiring Diagram — POWER DOOR LOCK SYS-
TEM —".
1.CHECK DOOR LOCK/UNLOCK SWITCH INPUT SIGNAL
With CONSULT-III
Check main power window and door lock/unlock switch ("CDL LOCK SW", "CDL UNLOCK SW") in DATA
MONITOR mode in CONSULT–III.
• When main power window and door lock/unlock switch is turned to LOCK:
• When main power window and door lock/unlock switch is turned to UNLOCK:
Without CONSULT-III
1. Remove key from ignition key cylinder.
2. Using an oscilloscope, check the signal between BCM connector M18 terminal 22 and ground when the main power window and door lock/unlock switch is turned to LOCK or UNLOCK.
3. Make sure the signals which are shown in the figur e below can be detected during 10 seconds just after
the door lock/unlock switch is turned to LOCK or UNLOCK.
Monitor item Condition
CDL LOCK SW LOCK
: ON
UNLOCK : OFF
CDL UNLOCK SW LOCK
: OFF
UNLOCK : ON
CDL LOCK SW :ON
CDL UNLOCK SW :ON
Revision: April 20092010 QX56