200 INFINITI QX56 2009 Factory Service Manual

VTL-34
< ON-VEHICLE REPAIR >
DUCTS AND GRILLES
REAR OVERHEAD DUCTS
Removal
1. Remove the luggage side finisher lower RH. Refer to INT-19, "Removal and Installation".
2. Remove the headliner. Refer to INT-17, "
Removal and Installation".
NOTE:
The rear headliner duct connected to the rear overhead duct is part of the headlining trim panel and is
replaced as an assembly.
3. Remove the two bolts and remove the rear upper and lower overhead ducts.
Installation
Installation is in the reverse order of removal.
REAR FLOOR DUCT
Removal
1. Remove the luggage side finisher lower RH. Refer to INT-19, "Removal and Installation".
2. Reposition the floor carpet out of the way.
3. Remove the two bolts and remove the rear floor duct.
Installation
Installation is in the reverse order of removal.
GRILLES
Removal
1. Remove the interior trim panels as necessary. Refer to IP-13, "Removal and Installation" or INT-14,
"Removal and Installation".
2. Remove the grille from the interior trim panel. NOTE:
To remove the rear roof console grilles, turn the gr ille counter-clockwise to release the grille from the rear
roof console.
Installation
Installation is in the reverse order of removal.
Revision: December 20092009 QX56

REFRIGERANT LINESVTL-35
< ON-VEHICLE REPAIR >
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REFRIGERANT LINES
Removal and Installation for Front EvaporatorINFOID:0000000003775282
Front Heater and Cooling Unit Assembly
REMOVAL
1. Remove the front heater core. Refer to VTL-19, "Removal and Installation".
AWIIA0086ZZ
1. Heater core cover 2. Heater core pipe bracket3. Heater core
4. Upper bracket 5. Upper heater and cooling unit case 6. A/C evaporator
7. Lower heater and cooling unit case 8. Blower motor 9. Variable blower control
Front
Revision: December 20092009 QX56

VTL-36
< ON-VEHICLE REPAIR >
REFRIGERANT LINES
2. Remove the defroster mode door arm.
3. Separate the heater core and cooling unit case.
4. Remove the evaporator.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
• Replace the O-rings on the A/C refrigerant pipes with new ones, then apply compressor oil to them
when installing them.
• After charging the refrigerant, check for leaks.
Removal and Installation for Rear EvaporatorINFOID:0000000003775283
Rear Heater and Cooling Unit Assembly
AWIIA0087ZZ
1. Front cover 2. Evaporator and heater core case 3. Evaporator
4. Side cover 5. Heater core6. Blower motor
7. Blower motor case 8. Variable blower control
Front
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REFRIGERANT LINESVTL-37
< ON-VEHICLE REPAIR >
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REMOVAL
1. Remove the rear heater and cooling unit assembly from the vehicle. Refer to VTL-16, "Removal and
Installation".
2. Remove the blower motor.
3. Remove the variable blower control.
4. Remove the air mix door motor.
5. Remove the mode door motor.
6. Remove the rear duct and mode door assembly. Refer to VTL-33, "
Removal and Installation".
7. Disassemble the rear heater and cooling unit assembly to remove the evaporator.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
• Replace the O-rings on the rear A/C pipes with new ones. Apply compressor oil to the O-rings when installing them.
• After charging the refrigerant, check for leaks.
Removal and Installation for Rear Expansion ValveINFOID:0000000003775284
REMOVAL
1. Discharge the refrigerant. Refer to HA-20, "HFC-134a (R-134a) Service Procedure".
2. Remove the luggage side finisher lower (RH). Refer to INT-19, "
Removal and Installation".
3. Disconnect the A/C refrigerant pi pes from the expansion valve.
CAUTION:
Cap or wrap the A/C refrigerant pipe ends with a suitable material such as vinyl tape to avoid the
entry of air and contaminants.
4. Remove the expansion valve.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
• Replace the O-rings on the A/C refrigerant pipes with new ones, th en apply compressor oil to them
when installing them.
• After charging the refrigerant, check for leaks. Expansion valve bolts : 4 N·m (0.41 kg-m, 35 in-lb)
A/C refrigerant pipe to expansion valve bolt : Refer to HA-29, "
Component".
Revision: December 20092009 QX56

WCS
WCS-1
DRIVER INFORMATION & MULTIMEDIA
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SECTION WCS
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CONTENTS
WARNING CHIME SYSTEM
BASIC INSPECTION ....... .............................3
DIAGNOSIS AND REPAIR WORKFLOW ..... .....3
Work Flow ........................................................... ......3
FUNCTION DIAGNOSIS ...............................4
WARNING CHIME SYSTEM .......................... .....4
WARNING CHIME SYSTEM .......................................4
WARNING CHIME SYSTEM : System Diagram . ......4
WARNING CHIME SYSTEM : System Description
......
4
WARNING CHIME SYSTEM : Component Parts
Location ............................................................... ......
5
WARNING CHIME SYSTEM : Component De-
scription .....................................................................
5
LIGHT REMINDER WARNING CHIME ................. ......6
LIGHT REMINDER WARNING CHIME : System
Diagram .....................................................................
6
LIGHT REMINDER WARNING CHIME : System
Description ................................................................
6
LIGHT REMINDER WARNING CHIME : Compo-
nent Parts Location ...................................................
7
LIGHT REMINDER WARNING CHIME : Compo-
nent Description ........................................................
7
SEAT BELT WARNING CHIME ............................ ......7
SEAT BELT WARNING CHIME : System Diagram
......
8
SEAT BELT WARNING CHIME : System Descrip-
tion ...................................................................... ......
8
SEAT BELT WARNING CHIME : Component
Parts Location ...........................................................
9
SEAT BELT WARNING CHIME : Component De-
scription .....................................................................
9
KEY WARNING CHIME ......................................... ....10
KEY WARNING CHIME : System Diagram ............10
KEY WARNING CHIME : System Description ........10
KEY WARNING CHIME : Component Parts Loca-
tion ....................................................................... ....
11
KEY WARNING CHIME : Component Description ....11
DIAGNOSIS SYSTEM (METER) .......................12
CONSULT-III Function (METER/M&A) ....................12
DIAGNOSIS SYSTEM (BCM) ...........................14
BUZZER ................................................................. ....14
BUZZER : CONSULT-III Function (BCM - BUZZ-
ER) ..........................................................................
14
COMPONENT DIAGNOSIS .........................15
POWER SUPPLY AND GROUND CIRCUIT ....15
COMBINATION METER ........................................ ....15
COMBINATION METER : Diagnosis Procedure .....15
COMBINATION METER : Diagnosis Procedure .....16
BCM (BODY CONTROL MODULE) ...................... ....16
BCM (BODY CONTROL MODULE) : Diagnosis
Procedure ............................................................ ....
16
METER BUZZER CIRCUIT ...............................18
Description ...............................................................18
Component Function Check ....................................18
Diagnosis Procedure ..............................................18
SEAT BELT BUCKLE SWITCH SIGNAL CIR-
CUIT ..................................................................
19
Description ...............................................................19
Component Function Check ..................................19
Diagnosis Procedure ..............................................19
Component Inspection .............................................20
KEY SWITCH SIGNAL CIRCUIT ......................21
Description ...............................................................21
Component Function Check ..................................21
Diagnosis Procedure ..............................................21
Component Inspection .............................................22
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WCS-2
WARNING CHIME SYSTEM .............................23
Wiring Diagram .................................................... ...23
ECU DIAGNOSIS ..................................... ...28
COMBINATION METER ................................. ...28
Reference Value .................................................. ...28
Wiring Diagram .......................................................30
Fail Safe .................................................................46
DTC Index ..............................................................47
BCM (BODY CONTROL MODULE) ..................49
Reference Value .................................................. ...49
Terminal Layout ......................................................51
Physical Values ......................................................51
Wiring Diagram .......................................................57
SYMPTOM DIAGNOSIS .............................62
THE LIGHT REMINDER WARNING DOES
NOT SOUND ................................................... ...
62
Description ........................................................... ...62
Diagnosis Procedure ...............................................62
THE SEAT BELT WARNING CONTINUES
SOUNDING, OR DOES NOT SOUND ...............
63
Description ........................................................... ...63
Diagnosis Procedure ...............................................63
THE KEY WARNING DOES NOT SOUND .......64
Description ........................................................... ...64
Diagnosis Procedure ...............................................64
PRECAUTION ............................................65
PRECAUTIONS .............................................. ...65
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. ...
65
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WCS
DIAGNOSIS AND REPAIR WORKFLOWWCS-3
< BASIC INSPECTION >
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BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work FlowINFOID:0000000003776687
DETAILED FLOW
1.OBTAIN INFORMATION ABOUT SYMPTOM
Interview the customer to obtain as much informa tion as possible about the conditions and environment under
which the malfunction occurred.
>> GO TO 2
2.CHECK SYMPTOM
• Check the symptom based on the information obtained from the customer.
• Check to see if any other malfunctions are present.
>> GO TO 3
3.CHECK CONSULT-III SELF -DIAGNOSIS RESULTS
Connect CONSULT-III and perform “SELF-DIAGNOSIS”. Refer to MWI-25, "
CONSULT-III Function (METER/
M&A)".
Are self-diagnosis results normal?
YES >> GO TO 4
NO >> Repair or replace the malfunctioning parts, GO TO 5
4.NARROW DOWN MALFUNCTIONING PART S THROUGH SYMPTOM DIAGNOSIS
Perform symptom diagnosis and repair or r eplace the identified malfunctioning parts.
>> GO TO 5
5.FINAL CHECK
Check that the warning buzzer in the combination meter operates normally.
Does it operate normally?
YES >> Inspection End.
NO >> GO TO 1
Revision: December 20092009 QX56

WCS-4
< FUNCTION DIAGNOSIS >
WARNING CHIME SYSTEM
FUNCTION DIAGNOSIS
WARNING CHIME SYSTEM
WARNING CHIME SYSTEM
WARNING CHIME SYSTEM : System DiagramINFOID:0000000003776688
WARNING CHIME SYSTEM : System DescriptionINFOID:0000000003776689
COMBINATION METER
• The buzzer for warning chime system is installed in the combination meter.
• The buzzer sounds when the combination meter receives a buzzer output signal from each unit.
BCM
BCM receives signals from various units and transmits a buzzer output signal to the combination meter with
CAN communication line if it judges that the warning buzzer should be activated.
BCM warning function list
AWNIA0210GB
Warning functions Signal name
Light reminder warning chime • Lighting switch position signal
• Door switch signal
Seat belt warning chime Seat belt buckle switch signal
Key warning chime • Key switch signal
• Door switch signal
Revision: December 20092009 QX56

WCS
WARNING CHIME SYSTEMWCS-5
< FUNCTION DIAGNOSIS >
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WARNING CHIME SYSTEM : Component Parts LocationINFOID:0000000003776690
WARNING CHIME SYSTEM : Component DescriptionINFOID:0000000003776691
AWNIA0211ZZ
1. Combination meter M23, M24 2. Combination switch (lighting switch)
M283. BCM M18, M19, M20 (view with instru-
ment lower panel LH removed)
4. Front door switch LH B8 5. Key switch and ignition knob switch
M12 6. Seat belt buckle pre-tensioner assem-
bly LH (seat belt buckle switch) B74
Unit Description
Combination meter • Receives the seat belt buckle switch signal from the seat belt buckle pre-tensioner assembly
LH (seat belt buckle switch) and transmits it to BCM with CAN communication line.
• Receives a buzzer output signal from BCM with CAN communication line.
BCM Transmits signals provided by various units to the combination meter with CAN communication
line.
Key switch and ignition knob
switch Transmits key switch signal to BCM.
Revision: December 20092009 QX56

WCS-6
< FUNCTION DIAGNOSIS >
WARNING CHIME SYSTEM
LIGHT REMINDER WARNING CHIME
LIGHT REMINDER WARNING CHIME : System DiagramINFOID:0000000003776692
LIGHT REMINDER WARNING CHIME : System DescriptionINFOID:0000000003776693
DESCRIPTION
With ignition switch in OFF or ACC position, driver door open, and lighting switch in 1ST or 2ND position, the
light warning chime will sound.
• BCM detects ignition switch in OFF or ACC position, front door switch LH ON, and lighting switch in 1ST or2ND position. And then transmits buzzer output signal (light reminder warning chime) to combination meter
with CAN communication line.
• When combination meter receives buzzer output signal ( light reminder warning chime), it sounds the buzzer.
WARNING OPERATION CONDITIONS
If all of the following conditions are fulfilled• Lighting switch is at 1st or 2nd position
• Ignition switch is at OFF or ACC
• Front door switch LH is ON
WARNING CANCEL CONDITIONS
Warning is canceled if any of the following conditions is fulfilled.
• Lighting switch OFF
• Ignition switch ON
• Front door switch LH is OFF
Seat belt buckle pre-tensioner as-
sembly LH (seat belt buckle
switch)Transmits a seat belt buckle switch signal to the combination meter.
Combination switch
(Lighting switch) Transmits the lighting switch position signal to BCM.
Front door switch LH Transmits the door switch signal to BCM.
Unit
Description
WKIA5465E
Revision: December 20092009 QX56