2008 INFINITI QX56 window

CCS-64
< SYMPTOM DIAGNOSIS >
ICC SYSTEM FREQUENTLY CANNOT DETECT THE VEHICLE AHEAD/ DETEC-TION ZONE IS SHORT
ICC SYSTEM FREQUENTLY CANNOT DETECT THE VEHICLE AHEAD/
DETECTION ZONE IS SHORT
Diagnosis ProcedureINFOID:0000000001744728
The detection function may become disrupted in the following cases:
• When the reflector of the vehicle ahead is small or not clean enough to reflect the laser.
• When driving a road with extremely sharp corners.
• When the laser cannot detect the reflector of the v ehicle ahead as the vehicle ahead is passing a hill or
passing the peak.
1.VISUAL CHECK
1. Check ICC sensor body window for contamination and foreign materials.
Is the ICC sensor window clean and free of obstruction?
YES >> GO TO 2
NO >> If any contamination or foreign materials ar e found, remove them. Then perform ICC system run-
ning test. Refer to CCS-8, "
ACTION TEST : ICC System Running Test".
2.CHECK FUNCTION
1. After performing laser beam aiming adjustment, perform ICC system running test. Refer to CCS-8,
"ACTION TEST : ICC System Running Test". Check that preceding vehicle detection performance has
been improved.
Is the ICC system operating normally?
YES >> INSPECTION END.
NO >> • Replace ICC sensor and perform laser beam aiming adjustment. Refer to CCS-71, "
ICC Sen-
sor".
• Perform ICC system running test. Refer to CCS-8, "
ACTION TEST : ICC System Running Test".
Revision: March 2010 2008 QX56

CCS
THE SYSTEM DOES NOT DETECT THE VEHICLE AHEAD AT ALL
CCS-65
< SYMPTOM DIAGNOSIS >
C
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THE SYSTEM DOES NOT DETECT THE VEHICLE AHEAD AT ALL
Diagnosis ProcedureINFOID:0000000001744729
1.VISUAL CHECK
With ignition switch turned ON (engine not started), che ck that all indicator lamps in ICC system display are
continuously lit. (Check for a missing segment in preceding vehicle detection display.)
Does the display operate normally?
YES >> GO TO 2
NO >> Check combination meter. Refer to MWI-24, "
Diagnosis Description".
2. VISUAL CHECK
Check ICC sensor window for contamination and foreign materials.
Is the ICC sensor window clean and free of obstruction?
YES >> If any contamination or foreign materials are found, remove them. Perform ICC system running
test. Refer to CCS-8, "
ACTION TEST : ICC System Running Test".
NO >> GO TO 3
3.VISUAL CHECK
Check ICC sensor window for cracks and scratches.
Is the ICC sensor window intact?
YES >> GO TO 4
NO >> • Replace ICC sensor and perform laser beam aiming adjustment. Refer to CCS-71, "
ICC Sen-
sor".
• Perform ICC system running test. Refer to CCS-8, "
ACTION TEST : ICC System Running Test".
4.ADJUST ICC SENSOR
• After performing laser beam aiming adjustment, perform ICC system running test. Refer to CCS-8, "
ACTION
TEST : ICC System Running Test". Check that preceding vehicle detection performance has been improved.
Is the ICC system operating normally?
YES >> INSPECTION END.
NO >> • Replace ICC sensor and perform laser beam aiming adjustment. Refer to CCS-71, "
ICC Sen-
sor".
• Perform ICC system running test. Refer to CCS-8, "
ACTION TEST : ICC System Running Test".
Revision: March 2010 2008 QX56

DEF-1
DRIVER CONTROLS
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SECTION DEF
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DEF
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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) ......................
6
CAN COMMUNICATION .....................................7
System Description ............................................. ......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 .....................14
Description ...............................................................14
Component Function Check ....................................14
Diagnosis Procedure ...............................................14
Component Inspection .............................................15
ECU DIAGNOSIS .........................................16
BCM (BODY CONTROL MODULE) .................16
Reference Value .................................................. ....16
Wiring Diagram ........................................................17
SYMPTOM DIAGNOSIS ..............................25
REAR WINDOW DEFOGGER AND DOOR
MIRROR DEFOGGER DO NOT OPERATE. ....
25
Diagnosis Procedure ........................................... ....25
REAR WINDOW DEFOGGER DOES NOT
OPERATE BUT BOTH OF DOOR MIRROR
DEFOGGER OPERATE. ...................................
26
Diagnosis Procedure ...............................................26
BOTH DOORS MIRROR DEFOGGER DON’T
OPERATE BUT REAR WINDOW DEFOG-
GER OPERATES ..............................................
27
Diagnosis Procedure ...............................................27
DRIVER SIDE DOOR MIRROR DEFOGGER
DOES NOT OPERATE. .....................................
28
Diagnosis Procedure ...............................................28
PASSENGER SIDE DOOR MIRROR DEFOG-
GER DOES NOT OPERATE. ............................
29
Revision: March 2010 2008 QX56

DEF-2
Diagnosis Procedure ..............................................29
REAR WINDOW DEFOGGER SWITCH DOES
NOT LIGHT, BUT REAR WINDOW DEFOG-
GER OPERATES ...............................................
30
Diagnosis Procedure ........................................... ...30
PRECAUTION .............................................31
PRECAUTIONS .............................................. ...31
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. ...
31
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ..................................
31
Handling for Adhesive and Primer ..........................32
ON-VEHICLE REPAIR ...............................33
REAR WINDOW DEFOGGER ........................ ...33
Filament Check .................................................... ...33
Filament Repair .......................................................33
Revision: March 2010 2008 QX56

DEF-4
< FUNCTION DIAGNOSIS >
REAR WINDOW DEFOGGER SYSTEM
FUNCTION DIAGNOSIS
REAR WINDOW DEFOGGER SYSTEM
System DiagramINFOID:0000000001735602
System DescriptionINFOID:0000000001735603
Operation Description
• Turn rear window defogger switch ON when the ignition switch is turned ON. Then A/C and AV switch
assembly (rear window defogger switch) transmits rear window defogger switch signal to BCM.
• BCM transmits rear window defogger control signal to IPDM E/R and display unit via CAN communication when rear window defogger operates.
• IPDM E/R turns rear window defogger relay and heated mirror relay ON when rear window defogger switch
signal is received.
• Rear window defogger and door mirror defogger are supplied with power and operate when rear window defogger relay and heated mirror relay turn ON.
• Rear window defogger ON is displayed when signal is received.
Timer function
• BCM turns rear window defogger relay and heated mirror relay ON for approximately 15 minutes when rear window defogger switch is turned ON while ignition switch is ON. It makes rear window defogger and door
mirror defogger operate.
• Timer is canceled after pressing rear window defogger switch again during timer operation. Then BCM turns
rear window defogger relay and heated mirror relay OFF. The same reaction also occurs during timer opera-
tion, if the ignition switch is turned OFF.
INPUT/OUTPUT SIGNAL CHART
ALLIA0892GB
Switch Input signal to BCM BCM functionAcutuator
Rear window defogger switch Defogger switch signal Rear window defogger & door mirror
defogger control Rear window defogger
Door mirror defogger
Ignition switch Ignition signal
Revision: March 2010 2008 QX56

REAR WINDOW DEFOGGER SYSTEMDEF-5
< FUNCTION DIAGNOSIS >
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Component Parts LocationINFOID:0000000001735604
Component DescriptionINFOID:0000000001735605
ALLIA0314ZZ
1. A. Steering column assembly B. BCM M18, M20 (view with instru-
ment panel removed) 2. A/C and AV switch assembly (rear
window defogger switch) M98 3. A. Rear window defogger ground
connector D604
B. Rear window defogger connector
D406
4. IPDM E/R E120, E122, E124 5. Do or mirror (door mirror defogger)
LH D4, RH D107
BCM • Operates the rear window defogger with the operation of rear window defogger switch.
• Performs the timer control of rear window defogger.
Rear window defogger relay • Operates the rear window defogger and the door mirror defogger with the control signal from
BCM.
A/C and AV switch assembly
(rear window defogger switch) • The rear window defogger switch is turned ON.
• Turns the indicator lamp ON when detecting the operation of rear window defogger.
Rear window defogger • Heats the heating wire with the power supply from the rear window defogger relay to prevent
the rear window from fogging up.
Door mirror defogger • Heats the heating wire with the power supply from the heated mirror relay to prevent the door
mirror from fogging up.
Revision: March 2010 2008 QX56

DEF-6
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (BCM)
DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Function (BCM - COMMON ITEM)INFOID:0000000001735606
APPLICATION ITEM
CONSULT-III performs the following functions via CAN communication with BCM.
SYSTEM APPLICATION
BCM can perform the following functions for each system.
NOTE:
It can perform the diagnosis modes except the following for all subsystem selection items.
REAR WINDOW DEFOGGER
REAR WINDOW DEFOGGER : CONSULT-III Function (BCM - REAR DEFOGGER)
INFOID:0000000001735607
DATA MONITOR
ACTIVE TEST
Diagnosis mode Function Description
WORK SUPPORT Changes the setting for each system function.
SELF-DIAG RESULTS Displays the diagnosis results judged by BCM. Refer to BCS-50, "
DTCIndex".
CAN DIAG SUPPORT MNTR Monitors the reception status of CAN communication viewed from BCM.
DATA MONITOR The BCM input/output signals are displayed.
ACTIVE TEST The signals used to activate each device are forcibly supplied from BCM.
ECU IDENTIFICATION The BCM part number is displayed.
CONFIGURATION This function is not used even though it is displayed.
SystemSub system selection item Diagnosis mode
WORK SUPPORT DATA MONITOR ACTIVE TEST
Rear window defogger REAR DEFOGGER ××
BCM BCM ×
Monitor Item Description
REAR DEF SW Indicates [ON/OFF] condition of rear defogger switch.
IGN SW Indicates [ON/OFF] condition of ignition switch.
Test Item Description
REAR DEFOGGER This test is able to check rear window defogger operation. Rear window defogger operates when
“ON” on CONSULT-I
II screen is touched.
Revision: March 2010 2008 QX56

DEF-8
< COMPONENT DIAGNOSIS >
REAR WINDOW DEFOGGER SWITCH
COMPONENT DIAGNOSIS
REAR WINDOW DEFOGGER SWITCH
DescriptionINFOID:0000000001735609
• The rear window defogger is operated by turning the rear window defogger switch ON.
• Turns the indicator lamp in the rear window defogger switch ON when operating the rear window defogger.
Component Function CheckINFOID:0000000001735610
1. CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION
Check that the indicator lamp of rear window defogger illuminates with rear window defogger switch ON.
Is the inspection result normal?
YES >> Rear window defogger switch function is OK.
NO >> Refer to DEF-8, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001735611
1. CHECK A/C AND AV SWITCH ASSEMBLY (REAR WINDOW DEFOGGER SWITCH) CIRCUIT
Does rear window defogger switch operate normally?
Is the inspection result normal?
YES >> Inspection End.
NO >> GO TO 2
2. CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect BCM and A/C and AV switch assembly.
3. Check continuity between BCM connector (A) and A/C and AV switch assembly connector (B).
4. Check continuity between BCM connector (A) and ground.
Is the inspection result normal?
YES >> Replace A/C and AV switch assembly. Refer to VTL-7, "Removal and Installation".
NO >> Repair or replace harness.
BCM connector Terminal A/C and AV switch
assembly connector Terminal Continuity
M18 (A) 9 M98 (B)16Yes
BCM connector Terminal
GroundContinuity
M18 (A) 9 No
ALLIA0315ZZ
Revision: March 2010 2008 QX56