display INFINITI QX56 2011 Factory Service Manual

HAC-138
< SYMPTOM DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
INSUFFICIENT COOLING
INSUFFICIENT COOLING
FRONT AIR CONDITIONER
FRONT AIR CONDITIONER : DescriptionINFOID:0000000006275984
Symptom Insufficient cooling
 No cool air comes out. (Air flow volume is normal.)
FRONT AIR CONDITIONER
: Diagnosis ProcedureINFOID:0000000006275985
NOTE:
Perform self-diagnoses with CONSULT-III before perform ing symptom diagnosis. If any DTC is detected, per-
form the corresponding diagnosis.
1.CHECK MAGNET CLUTCH OPERATION
1. Turn ignition switch ON.
2. Operate fan switch.
3. Press A/C switch.
4. Check that A/C indicator turns ON. Check visually and by sound that compressor operates.
5. Press A/C switch again.
6. Check that A/C indicator turns OFF. Check that compressor stops.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Perform diagnosis of “COMPRESSOR DOSE NOT OPERATE” in “SYMPTOM DIAGNOSIS”.
Refer to HAC-142, "
Diagnosis Procedure".
2.CHECK DRIVE BELT
Check tension of drive belt. Refer to EM-20, "
Checking".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Adjust or replace drive belt depending on the inspection results.
3.CHECK REFRIGERANT CYCLE
Connect recovery/recycling recharging equipment to the vehicle and perform pressure inspection with gauge.
Refer to HA-27, "
Symptom Table".
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace parts depending on the inspection results.
4.CHECK AIR LEAKAGE FROM EACH DUCT
Check duct and nozzle, etc. of the fr ont air conditioning system for leakage.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace parts depending on the inspection results.
5.CHECK AMBIENT TEMPERATURE DISPLAY
Check that there is not much diference between act ual ambient temperature and indicated temperature on
information display in combination meter.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Perform diagnosis for the A/C auto amp. connection recognition signal circuit. Refer to MWI-74,
"DiagnosisProcedure".
6.CHECK SETTING OF TEMPERATURE SETTING TRIMMER (FRONT)
1. Check setting value of temperature setting trimmer (front). Refer to HAC-68, "
FRONT AUTOMATIC AIR
CONDITIONING SYSTEM : Temperature Setting Trimmer (Front)".
2. Check that temperature setting trimme r (front) is set to “+ direction”.
Revision: 2010 May2011 QX56

SYSTEMINL-11
< SYSTEM DESCRIPTION >
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AUTO LIGHT ADJUSTMENT SYSTEM : System DiagramINFOID:0000000006216056
AUTO LIGHT ADJUSTMENT SYSTEM : System DescriptionINFOID:0000000006216057
OUTLINE
Auto light adjustment system is controlled by each f unction of BCM, combination meter and AV control unit
Control by BCM Auto light system
 Auto light adjustment system
AUTO LIGHT ADJUSTMENT SYSTEM
Description
 BCM supplies voltage to the optical sensor when the ignition switch is turned ON or ACC.
 Optical sensor converts outside brightness (lux) to voltage and transmits the optical sensor signal to BCM.
 BCM judges dimming/brightening of combination meter and display according to brightness outside the vehi- cle, when ignition switch is ON.
 BCM transmits dimmer signal to combination meter via CAN communication, according to auto light adjust- ment conditions. Dimmer signal is also transmitted to AV control unit.
NOTE:
As to dimming/brightening timing, the sensitivity depends on settings. The settings can be changed with CON-
SULT-III. Refer to EXL-23, "
HEADLAMP : CONSULT-III F unction (BCM - HEAD LAMP)".
Auto Light Adjustment Timing Table
When the ignition switch is ON, the illumination of co mbination meter and display switches dimming/brighten-
ing in the following condition.
BCM switches the illumination of combination me ter and display to dimming when outside brightening
obtained from the optical sensor signal is 1250 lx or le ss for 3 seconds or more. And BCM switches the illumi-
nation of combination meter and display to brightening when outside brightening from the optical sensor signal
is 2500 lx or more for 5 seconds or more.
JMLIA0967GB
Combination meter and display Dimming/brightening timing
Dimming Outside brightness is 1250 lx or less for 3 seconds or more.
Brightening Outside brightness is 2500 lx or more for 5 seconds or more.
Revision: 2010 May2011 QX56

INL-12
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (BCM)
DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Function (BCM - COMMON ITEM)INFOID:0000000006368143
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 sub system selection items.
×: Applicable item
*: This item is indicated, but not used.
FREEZE FRAME DATA (FFD)
The BCM records the following vehicle condition at the time a particular DTC is detected, and displays on
CONSULT-III.
Diagnosis mode Function Description
Work Support Changes the setting for each system function.
Self Diagnostic Result Displays the diagnosis results judged by BCM. Refer to BCS-57, "
DTCIndex".
CAN Diag Support Monitor Monitors the reception status of CAN communication viewed from BCM. Refer to CONSULT-III opera-
tion manual.
Data Monitor The BCM input/output signals are displayed.
Active Test The signals used to activate ea ch device are forcibly supplied from BCM.
Ecu Identification The BCM part number is displayed.
Configuration  Read and save the vehicle specification.
 Write the vehicle specification when replacing BCM.
System Sub system selection item Diagnosis mode
Work Support Data Monitor Active Test
Door lock DOOR LOCK ×××
Rear window defogger REAR DEFOGGER ××
Warning chime BUZZER ××
Interior room lamp timer INT LAMP ×××
Exterior lamp HEAD LAMP ×××
Wiper and washer WIPER ×××
Turn signal and hazard warning lamps FLASHER ×××
— AIR CONDITONER* ××
 Intelligent Key system
 Engine start system INTELLIGENT KEY
×××
Combination switch COMB SW ×
Body control system BCM ×
IVIS IMMU ×××
Interior room lamp battery saver BATTERY SAVER ×××
Back door TRUNK ×
Vehicle security system THEFT ALM ×××
RAP system RETAINED PWR ×
Signal buffer system SIGNAL BUFFER ××
Revision: 2010 May2011 QX56

IP-14
< REMOVAL AND INSTALLATION >
INSTRUMENT PANEL ASSEMBLY
Removal and Installation
INFOID:0000000006113098
WORK STEP
When removing instrument panel assembly, combination meter, front display unit, AV control unit, instrument
finisher A, instrument fini sher B, and center console assembly take st eps as per the order shown in the follow-
ing chart.
1. Optical sensor 2. Front defroster grille RH 3. Front defroster grille LH
4. Speaker grille LH 5. Squawker LH 6. Instrument finisher A
7. Combination meter 8. Cluster lid A 9. Push-button ignition switch
10. Illumination lamp 11. Socket and bulb 12. Instrument lower panel LH
13. Steering column upper cover 14. Steering column lower cover 15. Fuse block lid
16. Instrument center finisher LH 17. Instrument center finisher RH 18. Instrument lower cover
19. Illumination lamp 20. Socket and bulb 21. Glove box assembly
22. Socket and bulb 23. Illumination lamp 24. Instrument finisher B
25. Front passenger air bag module 26. Instrument panel assembly 27. Squawker RH
28. Speaker grille RH 29. Sunload sensor 30. Upper ventilator grille
31. Center speaker 32. Front display unit 33. AV control unit
34. Cluster lid D 35. Cluster lid C 36. Cluster lid C lower
37. Inner socket 38. Socket knob
: Clip
: Pawl
: Metal clip
Refer to GI-4, "
Components" for symbols in the figure.
PA R T S INSTRU-
MENT
PA N E L
ASSEMBLY COMBINA-
TION
METER FRONT
DISPLAY
UNIT AV c o n t r o l
unit INSTRU-
MENT
FINISHER A INSTRU-
MENT
FINISHER B CENTER
CONSOLE
ASSEMBLY
Instrument lower cover [1] [1] [1] [1] [1]
Glove box assembly [2] [2]
Front passenger air bag module
harness connector [3] [3]
Front passenger air bag module
mounting bolt [4] [4]
Selector lever knob [5] [2] [2] [5] [2]
Console finisher assembly [6] [3] [3] [6] [3]
Instrument center finisher RH [7] [4] [4] [7] [4]
Front body side welt RH [8] [8]
Front pillar garnish RH [9] [9]
Speaker grille RH [10] [10]
Squawker RH [11] [11]
Front defroster grille RH [12] [12]
Front defroster grille LH [13] [13]
Instrument center finisher LH [14] [5] [5] [14] [5]
Console rear finisher [15] [15] [6]
Center console assembly [16] [16] [7]
Front body side welt LH [17] [1] [1] [17]
Front pillar garnish LH [18] [18]
Speaker grille LH [19] [19]
Revision: 2010 May2011 QX56

INSTRUMENT PANEL ASSEMBLYIP-15
< REMOVAL AND INSTALLATION >
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[ ]:Number indicates step in removal procedures.
WARNING:
Before servicing, turn igni tion switch OFF, disconnect battery ne gative terminal, and wait 3 minutes or
more.
CAUTION:
When removing, always use a remover tool that is made of plastic.
REMOVAL
1. Remove instrument lower cover.
1. Pull disengaged pawls downward.
2. Pull back instrument lower cover.
3. Disconnect harness connectors.
Squawker LH [20] [20]
Instrument lower panel LH [21] [2] [2] [21]
Disconnect meter control switch
harness connector [22] [3] [3] [22]
Driver air bag module [23] [23]
Steering wheel [24] [24]
Steering column cover [25] [25]
Combination switch [26] [26]
Spiral cable [27] [27]
Cluster lid A [28] [4] [4] [28]
Combination meter [29] [5] [29]
Instrument finisher A [5]
Upper ventilator grille [30] [30]
Center speaker [31] [31]
Cluster lid C [32] [6] [6] [32]
Cluster lid C lower [33] [7] [33]
AV control unit [34] [8] [34]
Cluster lid D [35] [7] [35]
Front display unit [36] [8] [36]
instrument panel assembly
mounting screws and bolts [37] [37]
Squawker LH harness clip [38] [38]
Instrument panel assembly [39] [39]
Instrument finisher B [40]
PA R T S
INSTRU-
MENT
PA N E L
ASSEMBLY COMBINA-
TION
METER FRONT
DISPLAY UNIT AV c o n t r o l
unit INSTRU-
MENT
FINISHER A INSTRU-
MENT
FINISHER B CENTER
CONSOLE
ASSEMBLY
: Pawl
JMJIA3828ZZ
Revision: 2010 May2011 QX56

INSTRUMENT PANEL ASSEMBLYIP-21
< REMOVAL AND INSTALLATION >
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33. Remove cluster lid C lower. 1. Disengage cluster lid C lower fixing metal clips with remover tool (A).
2. Pull back cluster lid C lower, and then disconnect harness
connectors.
CAUTION:
Apply protective tape (B) on the part to protect it from dam-
age.
NOTE:
When removing cluster lid C lower without removing center console.
1. Disengage metal clips of lower side of cluster lid C lower
using a remover tool (A).
2. Disengage metal clips of upper side of cluster lid C lower
using a remover tool.
3. Pull back cluster lid C lower, and then disconnect harness connectors.
34. Remove AV control unit. Refer to AV-212, "
Removal and Installation".
35. Remove cluster lid D. 1. Remove cluster lid D fixing screw (A).
2. Pull back cluster lid D, and then disengage the pawls and metal clips.
36. Remove front display unit. Refer to AV-213, "
Removal and Installation".
37. Remove instrument panel assembly mounting screws (A) and bolts (B).
: Metal Clip
JMJIA3896ZZ
Metal clip
JMJIA3846ZZ
: Pawl
: Metal Clip
JMJIA3847ZZ
JMJIA3850ZZ
Revision: 2010 May2011 QX56

LAN-16
< SYSTEM DESCRIPTION >[CAN FUNDAMENTAL]
TROUBLE DIAGNOSIS
With PAST
MONITOR ITEM (ON-BOARD DIAGNOSIS)
NOTE:
For some models, CAN communication diagnosis result is received from the vehicle monitor.
Example: Vehicle Display
Item PRSNT Description
Initial diagnosis OK Normal at present
NG Control unit error (Excep t for some control units)
Transmission diagnosis OK Normal at present
UNKWN Unable to transmit signals for 2 seconds or more.
Diagnosis not performed
Control unit name
(Reception diagnosis) OK Normal at present
UNKWN Unable to receive signals for 2 seconds or more.
Diagnosis not performed
No control unit for receiving signals. (No applicable optional parts)
Item PRSNT PAST Description
Transmission diagnosis OKOK Normal at present and in the past
1 – 39 Normal at present, but unable to transmit signals for 2 seconds or more
in the past. (The number indicates the number of ignition switch cycles
from OFF to ON.)
UNKWN 0 Unable to transmit signals for 2 seconds or more at present.
Control unit name
(Reception diagnosis) OK
OK Normal at present and in the past
1 – 39 Normal at present, but unable to receive signals for 2 seconds or more
in the past. (The number indicates the number of ignition switch cycles
from OFF to ON.)
UNKWN 0 Unable to receive signals for 2 seconds or more at present.
–– Diagnosis not performed.
No control unit for receiving signals. (No applicable optional parts)
Item
Result indi-
cated Error counter Description
CAN_COMM
(Initial diagnosis) OK 0 Normal at present
NG 1 – 50 Control unit error
(The number indicates how many times diagnosis has been
run.)
CAN_CIRC_1
(Transmission diagnosis) OK 0 Normal at present
UNKWN 1 – 50 Unable to transmit for 2 seconds or more at present.
(The number indicates how many times diagnosis has been
run.)
CAN_CIRC_2 – 9
(Reception diagnosis of each unit) OK 0 Normal at present
UNKWN 1 – 50 Unable to transmit for 2 seconds or more at present.
(The number indicates how many times diagnosis has been
run.)
Diagnosis not performed.
No control unit for receiving signals. (No applicable optional
parts)
Revision: 2010 May2011 QX56

LAN
SYSTEMLAN-31
< SYSTEM DESCRIPTION > [CAN]
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Meter display signal
TR
RT
Oil pressure switch signal TR
RT
Position light request signal T R R
Rear fog light status signal T R
Rear window defogger con-
trol signal TR
RT
Sleep wake up signal T R R R R R R
Starter control relay signal T R
Starter relay status signal TRR
RT
Starting mode signal T R
Steering lock relay signal TRR
RT
Theft warning horn request
signal TR
Turn indicator signal R T R R
A/C display signal R T
A/C ON signal R T
Ambient temperature signal T R
Blower fan ON signal R T
Distance to empty signal R T
Fuel level low warning sig-
nal RT
Fuel level sensor signal R T
Manual mode shift down
signal RT
Manual mode shift up sig-
nal RT
Manual mode signal R T
Non-manual mode signal R T
Odometer signal R T
Parking brake switch signal R R T R R
Sleep-ready signal RT
RT
RT
Tow mode switch signal R T
Wake up signal RT
RT
Steering angle sensor mal-
function signal RR T R R
Steering angle sensor sig-
nal RR RR T R R
Steering angle speed signal R T R R Signal name
ECM
4WD
ABS
TCM
A-BAG AFS
AV
BCM
CGW
HVAC M&A
STRG
TPMS
IPDM-E
ADPPSB
E-SUS ICC
PWBD
Revision: 2010 May2011 QX56

LAN
DIAGNOSIS SYSTEM (CAN GATEWAY)LAN-105
< SYSTEM DESCRIPTION > [CAN GATEWAY]
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DIAGNOSIS SYSTEM (CAN GATEWAY)
CONSULT-III FunctionINFOID:0000000006220576
APPLICATION ITEM
CONSULT-III performs the following functi
ons via CAN communication with CAN gateway.
SELF DIAGNOSTIC RESULT
Refer to LAN-106, "DTCIndex".
Diagnosis mode Function Description
Ecu Identification The CAN gateway part number is displayed.
Self Diagnostic Result Displays the diagnosis results judged by CAN gateway.
CAN Diag Support Monitor The results of transmit/receive diagnosis of CAN communication can be read.
Configuration  Read and save the vehicle specification.
 Write the vehicle specification when replacing CAN gateway.
Revision: 2010 May2011 QX56

LAN-106
< ECU DIAGNOSIS INFORMATION >[CAN GATEWAY]
CAN GATEWAY
ECU DIAGNOSIS INFORMATION
CAN GATEWAY
Reference ValueINFOID:0000000006220577
TERMINAL LAYOUT
PHYSICAL VALUES
DTC Inspection Priority ChartINFOID:0000000006220578
If some DTCs are displayed at the same time, perfo
rm inspections one by one based on the following priority
chart.
DTC IndexINFOID:0000000006220579
NOTE:
JSGIA0023ZZ
Te r m i n a l N o .
(Wire color) Description
Condition Va l u e
(Approx.)
Signal name Input/
Output
+–
1
(L) —CAN-H (CAN commu-
nication circuit 1) Input/
Output ——
3
(Y) Ground Battery power supply Input Ignition switch OFF Battery voltage
4
(L) —
CAN-H (CAN commu-
nication circuit 2) Input/
Output ——
5
(B) Ground Ground — Ignition switch ON 0 V
6
(L) —CAN-H (CAN commu-
nication circuit 2) Input/
Output ——
7
(P) —
CAN-L (CAN commu-
nication circuit 1) Input/
Output ——
9
(GR) Ground Ignition power supply Input Ignition switch ON Battery voltage
10
(R) —CAN-L (CAN commu-
nication circuit 2) Input/
Output ——
11
(B) Ground Ground — Ignition switch ON 0 V
12
(R) —CAN-L (CAN commu-
nication circuit 2) Input/
Output ——
Priority DTC
1  B2600: CONFIG ERROR
 U1010: CONTROL UNIT(CAN)
2 U1000: CAN COMM CIRCUIT
Revision: 2010 May2011 QX56