2010 INFINITI QX56 wiring diagram

CCS-48
< ECU DIAGNOSIS >
ICC UNIT
Wiring Diagram
INFOID:0000000005146005
ABOWA0005GB
Revision: April 20092010 QX56

CHG
CHG-1
ELECTRICAL & POWER CONTROL
C
DE
F
G H
I
J
K L
B
SECTION CHG
A
O P
N
CONTENTS
CHARGING SYSTEM
PRECAUTION .......
........................................2
PRECAUTIONS .............................................. .....2
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
2
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ............................... ......
2
Precaution for Power Generation Variable Voltage
Control System ..........................................................
3
PREPARATION ............................................4
PREPARATION .............................................. .....4
Special Service Tool ........................................... ......4
Commercial Service Tool ..........................................4
BASIC INSPECTION ....................................5
DIAGNOSIS AND REPAIR WORKFLOW ..... .....5
Work Flow ........................................................... ......5
FUNCTION DIAGNOSIS ...............................6
CHARGING SYSTEM ..................................... .....6
System Diagram .................................................. ......6
System Description ...................................................6
Component Description ............................................6
POWER GENERATION VOLTAGE VARI-
ABLE CONTROL SYSTEM .................................
7
System Diagram .................................................. ......7
System Description ...................................................7
Component Description .............................................7
COMPONENT DIAGNOSIS ..........................8
CHARGING SYSTEM PRELIMINARY IN-
SPECTION ....... ..................................................
8
Inspection Procedure ........................................... .....8
POWER GENERATION VOLTAGE VARI-
ABLE CONTROL SYSTEM OPERATION IN-
SPECTION .........................................................
9
Diagnosis Procedure ........................................... .....9
B TERMINAL CIRCUIT .....................................11
Description ...............................................................11
Diagnosis Procedure ...............................................11
L TERMINAL CIRCUIT .....................................12
Description ...............................................................12
Diagnosis Procedure ...............................................12
S TERMINAL CIRCUIT .....................................13
Description ...............................................................13
Diagnosis Procedure ...............................................13
CHARGING SYSTEM .......................................14
Wiring Diagram ........................................................14
SYMPTOM DIAGNOSIS ..............................20
CHARGING SYSTEM .......................................20
Symptom Table ................................................... ....20
ON-VEHICLE REPAIR .................................21
GENERATOR ....................................................21
Removal and Installation ..................................... ....21
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .......................................... ...
22
GENERATOR ....................................................22
Generator ............................................................ ....22
Revision: April 20092010 QX56

CHG
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM OPERATION
INSPECTION
CHG-9
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
K L
B A
O P
N
POWER GENERATION VOLTAGE VARI
ABLE CONTROL SYSTEM OPER-
ATION INSPECTION
Diagnosis ProcedureINFOID:0000000005146558
Regarding Wiring Diagram information, refer to CHG-14, "Wiring Diagram".
CAUTION:
When performing this inspection, always use a charged battery that has completed the battery inspec-
tion. (When the charging rate of the battery is low, the response speed of the voltage change will
become slow. This can cause an incorrect inspection.)
1.CHECK ECM (CONSULT-III)
Perform ECM self-diagnosis with CONSULT-III. Refer to EC-63, "
CONSULT-III Function (ENGINE)".
Self
-diagnostic results content
No malfunction detected>> GO TO 2.
Malfunction detected>> Check applicable parts, and repair or replace corresponding parts.
2.CHECK OPERATION OF POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM
1. Connect CONSULT-III and start the engine.
2. The selector lever is in “P” or “N” position and a ll of the electric loads and A/C, etc. are turned OFF.
3. Select “ALTERNATOR DUTY” in “Active Test” of “ENGINE”, and then check the value of “BATTERY
VOLT” monitor when DUTY value of “ALTERNATOR DUTY” is set to 40.0 %.
4. Check the value of “BATTERY VOLT” monitor when DUTY value of “ALTERNATOR DUTY” is set to 80.0%.
Is the measurement val ue within specification?
YES >> Inspection End.
NO >> GO TO 3.
3.CHECK IPDM E/R (CONSULT-III)
Perform IPDM E/R self-diagnosis with CONSULT-III. Refer to PCS-14, "
CONSULT - III Function (IPDM E/R)".
Self
-diagnostic results content
No malfunction detected>> GO TO 4.
Malfunction detected>> Check applicable parts, and repair or replace corresponding parts.
4.CHECK HARNESS BETWEEN GE NERATOR AND IPDM E/R
“BATTERY VOLT”
2 seconds after setting the
DUTY value of “ALTERNA-
TOR DUTY” to 40.0 %
: 12 - 13.6 V
“BATTERY VOLT”
20 seconds after setting
the DUTY value of “ALTER-
NATOR DUTY” to 80.0 % : +0.5 V or more against
the value of “BATTERY
VOLT” monitor when
DUTY value is 40.0 %
Revision: April 20092010 QX56

CHG
B TERMINAL CIRCUITCHG-11
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
K L
B A
O P
N
B TERMINAL CIRCUIT
DescriptionINFOID:0000000005146559
The terminal “1” circuit supplies power to charge the battery and operate the vehicles electrical system.
Diagnosis ProcedureINFOID:0000000005146560
Regarding Wiring Diagram information, refer to
CHG-14, "Wiring Diagram".
1.CHECK TERMINAL “1” CONNECTION
1. Turn ignition switch OFF.
2. Verify terminal “1” is clean and tight.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair terminal “1” connection. Confirm repa ir by performing complete Starting/Charging system
test. Refer to diagnostic station instruction manual.
2.CHECK TERMINAL “1” CIRCUIT
Check voltage between generator connector E204 terminal 1 and
ground.
Is voltage reading as specified?
YES >> GO TO 3.
NO >> Check harness for open between generator and fusible link.
3.CHECK TERMINAL “1” CONNECTION (VOLTAGE DROP TEST)
1. Start engine, then engine running at idle and warm.
2. Check voltage between battery positive terminal and generator connector E204 terminal 1.
Is the voltage reading as specified?
YES >> Terminal “1” circuit is normal. Refer to CHG-5, "Work
Flow".
NO >> Check harness between battery and generator for high resistance.
(+) (-) Voltage
Connector Terminal
E204 1Ground Battery voltage
ALMIA0197ZZ
(+)
(-)Voltage
Connector Terminal
E204 1 Battery positive terminal Less than 0.2V
ALMIA0198ZZ
Revision: April 20092010 QX56

CHG-12
< COMPONENT DIAGNOSIS >
L TERMINAL CIRCUIT
L TERMINAL CIRCUIT
DescriptionINFOID:0000000005146561
The terminal “2” (L) circuit controls the charge warning lamp. The charge warning lamp illuminates when the
ignition switch is set to ON or START. When the generator is providing sufficient voltage with the engine run-
ning, the charge warning lamp will go off. If the c harge warning lamp illuminates with the engine running, a
malfunction is indicated.
Diagnosis ProcedureINFOID:0000000005146562
Regarding Wiring Diagram information, refer to CHG-14, "Wiring Diagram".
1.CHECK CHARGE WARNING LAMP CIRCUIT CONNECTION
Verify generator connector E205 terminal 2 is clean and tight.
Is the connection secure?
YES >> GO TO 2.
NO >> Repair the connection. Confirm repair by per forming complete Starting/Charging system test.
Refer to diagnostic station instruction manual.
2.CHECK CHARGE WARNING LAMP CIRCUIT
1. Disconnect generator connector E205.
2. Apply ground to generator harness connector E205 terminal 2 with the ignition switch in the ON position.
Does the charge lamp illuminate?
YES >> Check generator function. Refer to CHG-5, "Work Flow".
NO >> GO TO 3.
3.CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect the generator connector E205 and combination meter connector M24.
3. Check continuity between generator harness connector E205 (A) terminal 2 and combination meter harness connector M24
(B) terminal 6.
4. Check continuity between generator harness connector E205 (A) terminal 2 and ground.
Are the continuity results as specified?
YES >> Replace the combination meter. Refer to MWI-100, "Removal and Installation".
NO >> Repair the harness or connector. Charge lamp should illuminate
ALMIA0200ZZ
AB
Continuity
Connector Terminal Connector Terminal
E205 2M24 6Yes
A —
Continuity
Connector Terminal
E205 2Ground No
AWMIA1099ZZ
Revision: April 20092010 QX56

CHG
S TERMINAL CIRCUITCHG-13
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
K L
B A
O P
N
S TERMINAL CIRCUIT
DescriptionINFOID:0000000005146563
The output voltage of the generator is controlled by the IC
regulator at terminal “3” (S) detecting the input volt-
age. Terminal “3” circuit detects the battery voltage to adjust the generator output voltage with the IC regulator.
Diagnosis ProcedureINFOID:0000000005146564
Regarding Wiring Diagram information, refer to CHG-14, "Wiring Diagram".
1.CHECK VOLTAGE REGULATOR CIRCUIT CONNECTION
Check to see if connector E205 terminal 3 is clean and tight.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair terminal connection. Confirm repair by performing complete Starting/Charging system test.
Refer to diagnostic station instruction manual.
2.CHECK VOLTAGE REGULATOR CIRCUIT
Check voltage between generator harness connector E205 terminal
3 and ground.
Does battery voltage exist?
YES >> Refer to CHG-5, "Work Flow".
NO >> Check harness for open between generator and fuse. 3 - ground
Battery voltage
ALMIA0201ZZ
Revision: April 20092010 QX56

CHG-14
< COMPONENT DIAGNOSIS >
CHARGING SYSTEM
CHARGING SYSTEM
Wiring DiagramINFOID:0000000005146565
ABMWA0376GB
Revision: April 20092010 QX56

DEF-1
DRIVER CONTROLS
C
DE
F
G H
I
J
K
M
SECTION DEF
A
B
DEF
N
O P
CONTENTS
DEFOGGER
BASIC INSPECTION ....... .............................3
DIAGNOSIS AND REPAIR WORKFLOW ..... .....3
Repair Work Flow ................................................ ......3
FUNCTION DIAGNOSIS ...............................4
REAR WINDOW DEFOGGER SYSTEM ........ .....4
System Diagram .................................................. ......4
System Description ...................................................4
Component Parts Location ........................................5
Component Description .............................................5
DIAGNOSIS SYSTEM (BCM) .............................6
COMMON ITEM ..................................................... ......6
COMMON ITEM : CONSULT-III Function (BCM -
COMMON ITEM) .......................................................
6
REAR WINDOW DEFOGGER ............................... ......6
REAR WINDOW DEFOGGER : CONSULT-III
Function (BCM - REAR DEFOGGER) ......................
7
COMPONENT DIAGNOSIS ..........................8
REAR WINDOW DEFOGGER SWITCH ........ .....8
Description .......................................................... ......8
Component Function Check ......................................8
Diagnosis Procedure .................................................8
REAR WINDOW DEFOGGER RELAY ...............9
Description .......................................................... ......9
Component Function Check ......................................9
Diagnosis Procedure .................................................9
REAR WINDOW DEFOGGER POWER SUP-
PLY AND GROUND CIRCUIT ............................
10
Description .......................................................... ....10
Component Function Check ....................................10
Diagnosis Procedure ...............................................10
Component Inspection ............................................11
DOOR MIRROR DEFOGGER LH ..................
....12
Description ........................................................... ....12
Component Function Check ....................................12
Diagnosis Procedure ...............................................12
Component Inspection .............................................13
DOOR MIRROR DEFOGGER RH .....................15
Description ...............................................................15
Component Function Check ....................................15
Diagnosis Procedure ...............................................15
Component Inspection .............................................16
ECU DIAGNOSIS .........................................18
BCM (BODY CONTROL MODULE) .................18
Reference Value .................................................. ....18
Terminal Layout .......................................................21
Physical Values ................................................... ....21
Wiring Diagram ........................................................27
Fail Safe ..................................................................34
DTC Inspection Priority Chart ...............................35
DTC Index ...............................................................35
SYMPTOM DIAGNOSIS ..............................37
REAR WINDOW DEFOGGER AND DOOR
MIRROR DEFOGGER DO NOT OPERATE. ....
37
Diagnosis Procedure ........................................... ....37
REAR WINDOW DEFOGGER DOES NOT
OPERATE BUT BOTH OF DOOR MIRROR
DEFOGGER OPERATE. ...................................
38
Diagnosis Procedure ...............................................38
BOTH DOORS MIRROR DEFOGGER DON’T
OPERATE BUT REAR WINDOW DEFOG-
GER OPERATES ..............................................
39
Diagnosis Procedure ...............................................39
DRIVER SIDE DOOR MIRROR DEFOGGER
DOES NOT OPERATE. .....................................
40
Diagnosis Procedure ...............................................40
Revision: April 20092010 QX56