reset INFINITI QX56 2011 Factory Repair Manual

HAC-38
< SYSTEM DESCRIPTION >[AUTOMATIC AIR CONDITIONING]
OPERATION
- When air flow is small
- When air flow is large
Controller (Preset Switch)
JMIIA0410ZZ
JMIIA0411ZZ
1. Auto intake switch
Switch name Function
Auto intake switch  Automatic intake control (exhaust gas / outside odor detecting mechanism) mode (switch indicator)
changes between ON ⇔ OFF each time when auto intake switch is pressed while front blower mo-
tor is activated.
 When auto intake switch turns ON, front air conditioning system becomes the following status.
- A/C switch: ON
- Air inlet: Recirculation [After approximately 5 minutes, air inlet is switched to automatic intake con- trol (exhaust gas / outside odor detecting mechanism).]
 When auto intake switch turns ON ⇒ OFF, air inlet becomes the fresh air intake.
NOTE:
 Interlocking condition of A/C switch can be changed. Refer to HAC-70, "
ACCS (ADVANCED CLI-
MATE CONTROL SYSTEM) : Auto Intake Switch Interlocking Movement Change Function".
 Auto intake switch does not turn ON during the following status.
- Air outlet: DEF
- Ambient temperature: −2 °C (28 °F) or less
JMIIA0826ZZ
Revision: 2010 May2011 QX56

A/C AUTO AMP.HAC-45
< ECU DIAGNOSIS INFORMATION > [AUTOMATIC AIR CONDITIONING]
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*1: With ACCS (advanced climate control system)
*2: A/C auto amp. is not used for control.
Fail-safeINFOID:0000000006275887
FAIL-SAFE FUNCTION
If a communication error exists between the A/C auto am p., and the AV control unit and preset switch for 30
seconds or longer, air conditioning is controlled under the following conditions:
When ambient temperature is less than 3 °C (37 °F) and engine coolant temperature is less than 56 °C (133 °F)
When ambient temperature is 3 °C (37 °F) or more, or engine coolant temperature is 56 °C (133 °F) or more
DTC IndexINFOID:0000000006275888
34
(L/O) GroundRear blower motor control
signal Output Ignition switch ON
 Rear fan speed: 1st
speed (manual)
37
(B) —Ground — — —
38
(G/W) Ground Rear A/C relay control signal Output Ignition
switch
ONRear blower
motor: ON
0 V
Rear blower
motor: OFF 12 V
Te r m i n a l N o .
(Wire color) Description
ConditionVa l u e
(Approx.)
+ − Signal name Input/
Output
JSIIA0096ZZ
Compressor : ON
Air outlet : DEF
Air inlet : FRE (Fresh air intake)
Blower fan speed : AUTO
Set temperature : Setting before communication error occurs
Compressor : ON
Air outlet : AUTO
Air inlet : 20% FRE (20% fresh air intake)
Blower fan speed : AUTO
Set temperature : Setting before communication error occurs
DTC Items
(CONSULT-III screen terms) Reference
U1000 CAN COMM CIRCUIT HAC-72, "
DTC Logic"
U1010 CONTROL UNIT (CAN)HAC-73, "DTC Logic"
B2578 IN-VEHICLE SENSORHAC-74, "DTC Logic"
B2579 IN-VEHICLE SENSORHAC-74, "DTC Logic"
B257B AMBIENT SENOR HAC-77, "DTC Logic"
B257C AMBIENT SENOR HAC-77, "DTC Logic"
B2581 INTAKE SENSORHAC-80, "DTC Logic"
B2582 INTAKE SENSORHAC-80, "DTC Logic"
Revision: 2010 May2011 QX56

HAC-144
< REMOVAL AND INSTALLATION >[AUTOMATIC AIR CONDITIONING]
FRONT A/C CONTROL
REMOVAL AND INSTALLATION
FRONT A/C CONTROL
Removal and InstallationINFOID:0000000006275996
REMOVAL
1. Remove cluster lid C. Refer to
IP-14, "Removal and Installation".
2. Remove preset switch. Refer to AV-227, "
Removal and Installation".
3. Disconnect harness connector from front A/C control.
INSTALLATION
Install in the reverse order of removal.
Revision: 2010 May2011 QX56

MWI-2
DIAGNOSIS SYSTEM (COMBINATION
METER) ..............................................................
29
On Board Diagnosis Function .............................. ...29
CONSULT-III Function ...........................................30
ECU DIAGNOSIS INFORMATION ..............35
COMBINATION METER ................................. ...35
Reference Value .................................................. ...35
Fail-Safe .................................................................42
DTC Index ..............................................................43
IPDM E/R ...........................................................44
List of ECU Reference ......................................... ...44
WIRING DIAGRAM .....................................45
METER SYSTEM ............................................ ...45
Wiring Diagram .................................................... ...45
CLOCK ...............................................................55
Wiring Diagram .................................................... ...55
BASIC INSPECTION ...................................57
DIAGNOSIS AND REPAIR WORKFLOW
(METER SYSTEM ) .......................................... ...
57
Work flow ............................................................. ...57
DTC/CIRCUIT DIAGNOSIS ...................... ...59
U1000 CAN COMM CIRCUIT ......................... ...59
Description ........................................................... ...59
DTC Logic ...............................................................59
Diagnosis Procedure .............................................59
U1010 CONTROL UNIT (CAN) .........................60
Description ........................................................... ...60
DTC Logic ...............................................................60
Diagnosis Procedure ..............................................60
B2205 VEHICLE SPEED ...................................61
Description ........................................................... ...61
DTC Logic ...............................................................61
Diagnosis Procedure .............................................61
B2267 ENGINE SPEED .....................................62
Description ........................................................... ...62
DTC Logic ...............................................................62
Diagnosis Procedure ..............................................62
B2268 WATER TEMP ........................................63
Description ........................................................... ...63
DTC Logic ...............................................................63
Diagnosis Procedure ..............................................63
POWER SUPPLY AND GROUND CIRCUIT .....64
COMBINATION METER ........................................ ...64
COMBINATION METER : Diagnosis Procedure ....64
TRIP RESET AND ILLUMINATION CON-
TROL SWITCH SIGNAL CIRCUIT ....................
65
Diagnosis Procedure ............................................ ...65
Component Inspection ............................................66
TRIP COMPUTER SWITCH SIGNAL CIRCUIT
...
67
Diagnosis Procedure ............................................ ...67
Component Inspection ............................................68
FUEL LEVEL SENSOR SIGNAL CIRCUIT .......69
Component Function Check ................................ ...69
Diagnosis Procedure ..............................................69
Component Inspection ............................................70
OIL PRESSURE SWITCH SIGNAL CIRCUIT ...71
Component Function Check ...................................71
Diagnosis Procedure ...............................................71
Component Inspection ............................................71
WASHER LEVEL SWITCH SIGNAL CIRCUIT ...73
Diagnosis Procedure ............................................ ...73
Component Inspection ............................................73
A/C AUTO AMP. CONNECTION RECOGNI-
TION SIGNAL CIRCUIT ....................................
74
Diagnosis Procedure ........................................... ...74
SYMPTOM DIAGNOSIS ............................75
THE FUEL GAUGE INDICATOR DOES NOT
OPERATE ....................................................... ...
75
Description ........................................................... ...75
Diagnosis Procedure ...............................................75
THE TRIP RESET AND ILLUMINATION CON-
TROL SWITCH IS INOPERATIVE ....................
76
Description ........................................................... ...76
Diagnosis Procedure ...............................................76
THE TRIP COMPUTER SWITCH IS INOPER-
ATIVE .................................................................
77
Description ........................................................... ...77
Diagnosis Procedure ...............................................77
THE OIL PRESSURE WARNING LAMP
DOES NOT TURN ON .................................... ...
78
Description ........................................................... ...78
Diagnosis Procedure ...............................................78
THE OIL PRESSURE WARNING LAMP
DOES NOT TURN OFF .................................. ...
79
Description ........................................................... ...79
Diagnosis Procedure ...............................................79
THE PARKING BRAKE RELEASE WARNING
CONTINUES DISPLAYING, OR DOES NOT
DISPLAY ............................................................
80
Description ........................................................... ...80
Diagnosis Procedure ...............................................80
Revision: 2010 May2011 QX56

MWI
MWI-3
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THE LOW WASHER FLUID WARNING CON-
TINUES DISPLAYING, or DOES NOT DIS-
PLAY .............................................................. ....
81
Description .......................................................... ....81
Diagnosis Procedure ...............................................81
THE DOOR OPEN WARNING CONTINUES
DISPLAYING, OR DOES NOT DISPLAY ..........
82
Description .......................................................... ....82
Diagnosis Procedure ...............................................82
THE AMBIENT TEMPERATURE DISPLAY IS
INCORRECT .......................................................
83
Description .......................................................... ....83
Diagnosis Procedure ...............................................83
NORMAL OPERATING CONDITION .................84
INFORMATION DISPLAY ..................................... ....84
INFORMATION DISPLAY : Description ..................84
REMOVAL AND INSTALLATION ...............85
COMBINATION METER ...................................85
Exploded View ..................................................... ....85
Removal and Installation .........................................85
Disassembly and Assembly .....................................85
TRIP RESET AND ILLUMINATION CON-
TROL SWITCH ..................................................
86
Exploded View .........................................................86
Removal and Installation .........................................86
TRIP COMPUTER SWITCH ..............................87
Exploded View .........................................................87
Removal and Installation .........................................87
CLOCK ..............................................................88
Exploded View .........................................................88
Removal and Installation .........................................88
Revision: 2010 May2011 QX56

MWI-6
< SYSTEM DESCRIPTION >
COMPONENT PARTS
SYSTEM DESCRIPTION
COMPONENT PARTS
METER SYSTEM
METER SYSTEM : Component Parts LocationINFOID:0000000006221690
1.IPDM E/R
Refer to
PCS-4, "Component Parts
Location". 2.
ECM
Refer to
EC-16, "
Component Parts
Location". 3. Washer level switch
4. Oil pressure switch
Refer to
EM-57, "
Exploded View".5. Ambient sensor 6. A/C auto amp.
Refer to
HAC-6, "
FRONT AUTO-
MATIC AIR CONDITIONING SYS-
TEM : Component Parts Location".
7. TCM
Refer to
TM-10, "
A/T CONTROL
SYSTEM : Componen t Parts Loca-
tion". 8.ABS actuator and electric unit (con-
trol unit)
Refer to
BRC-10, "
Component Parts
Location". 9.BCM
Refer to
BCS-4, "
BODY CONTROL
SYSTEM : Component Parts Loca-
tion".
10. Fuel level sensor unit 11. Trip computer switch 12. Combination meter
13. Trip reset and illumination control
switch 14. Parking brake switch
A. Under of left side second seat
JSNIA3157ZZ
Revision: 2010 May2011 QX56

MWI
COMPONENT PARTSMWI-7
< SYSTEM DESCRIPTION >
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METER SYSTEM : Com ponent DescriptionINFOID:0000000006221691
CLOCK
Unit Description
Combination meter Controls the following with the signals received from each unit via CAN communication and the sig-
nals from switches and sensors.
 Speedometer
 Tachometer
 Engine coolant temperature gauge
 Fuel gauge
 Engine oil pressure gauge
 Voltmeter
 Warning lamps
 Indicator lamps
 Meter illumination control
 Meter effect function
 Information display
Trip computer switch Transmits the following signals to the combination meter.
 Enter switch signal
 Select switch signal
Trip reset and illumination con-
trol switch Transmits the following signals to the combination meter.
 Trip reset switch signal
 Illumination control switch signal (+)
 Illumination control switch signal (
−)
ECM Transmits the following signals to the combination meter via CAN communication.
 Engine speed signal
 Engine coolant temperature signal
 Engine status signal
 Fuel consumption monitor signal
ABS actuator and electric unit
(control unit) Transmits the vehicle speed signal to the combination meter via CAN communication.
IPDM E/R Transmits the oil pressure switch signal to the BCM via CAN communication.
BCM Transmits the following signals to the combination meter via CAN communication.
 Oil pressure switch signal
 Position light request signal
 Dimmer signal
 Door switch signal
 Meter ring illumination request signal
 Starter relay status signal
TCM Transmits the shift position signal to the combination meter via CAN communication.
A/T shift selector Transmits the following signals to the combination meter.
 Manual mode signal
 Non-manual mode signal
 Manual mode shift up signal
 Manual mode shift down signal
Fuel level sensor unit Transmits the fuel level sensor signal to the combination meter.
Oil pressure switch Transmits the oil pressure switch signal to the IPDM E/R.
Ambient sensor Transmits the ambient sensor signal to the combination meter.
A/C auto amp. Transmits the A/C auto amp. connection recognition signal to the combination meter.
Parking brake switch Transmits the parking brake switch signal to the combination meter.
Washer level switch Transmits the washer level switch signal to the combination meter.
Revision: 2010 May2011 QX56

MWI-12
< SYSTEM DESCRIPTION >
SYSTEM
METER SYSTEM : Fail-Safe
INFOID:0000000006221695
FA I L - S A F E
The combination meter activates the fail-safe contro l if CAN communication with each unit is malfunctioning.
A. With ASCD models B. With ICC models C. For U.S.A.
D. For Canada
JSNIA3234ZZ
Function Specifications
Speedometer
Reset to zero by suspending communication.
Tachometer
Engine coolant temperature gauge
Engine oil pressure gauge
Illumination control When suspending communication, changes to nighttime mode.
Information display Odo/trip meter An indicated value is maintained at communications blackout.
Shift position indicator The display turns OFF by suspending communication.
Door open warning The display turns OFF by suspending communication.
Buzzer The buzzer turns OFF by suspending communication.
Revision: 2010 May2011 QX56

MWI
SYSTEMMWI-21
< SYSTEM DESCRIPTION >
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 Current fuel consumption on the information di splay is updated approximately every 0.5 seconds.
 Current fuel consumption on the information displa y shows 0 l/100km (0 mpg) when vehicle speed is 0 km/h
(0 MPH).
Average Fuel Consumption
The combination meter calculates average fuel c onsumption based on the following signals, and the calcu-
lated value is displayed on the information display.
NOTE:
 Average fuel consumption on the information display is updated approximately every 30 seconds.
 Soon after a reset or when the ignition switch is turned ON right after battery removal and installation, “ −−−”
is displayed until after a travel of 30 seconds and approximately 500 m (0.31 mile).
Distance to Empty
The combination meter calculates distance to empty based on the following signals, and the calculated value
is displayed on the information display.
NOTE:
 Distance to empty on the information display is updated approximately every 30 seconds.
 When the ignition switch is turned from OFF to ON, “ −−−” is displayed until after a travel of approximately
500 m (0.31 mile).
 The indicated values may not match each other when refueling with the ignition switch ON.
Average Vehicle Speed
The combination meter calculates average vehicle speed based on the following signals, and the calculated
value is displayed on the information display.
NOTE:
 Average vehicle speed on the information disp lay is updated approximately every 30 seconds.
 Soon after a reset or when the ignition switch is turned ON right after battery removal and installation, “ −−−”
is displayed until after a 30 seconds.
Travel Time
Signal name Signal path
Fuel consumption monitor signal ECM Combination meter
Vehicle speed signal ABS actuator and electric unit (control unit) Combination meter
Signal name Signal path
Fuel consumption monitor signal ECM Combination meter
Vehicle speed signal ABS actuator and electric unit (control unit) Combination meter
Signal name Signal path
Fuel level sensor signal Fuel level sensor unit Combination meter
Fuel consumption monitor signal ECM Combination meter
Vehicle speed signal ABS actuator and electric unit (control unit) Combination meter
Signal name Signal path
Ignition signal —
Vehicle speed signal ABS actuator and electric unit (control unit) Combination meter
Revision: 2010 May2011 QX56

MWI-26
< SYSTEM DESCRIPTION >
SYSTEM
 The combination meter judges showing/hiding of “other warning”, according to the signals below:
Meter Illumination Level Indication
When receiving the following signals, the combination meter causes an interrupt on the information display to
indicate an illumination level.
WARNING CHECK INDICATION
 The combination meter can cause an interrupt on the information display to indicate a warning, based onsignals received from each unit and switch.
 The indicated warning can be checked with “WARNING” during the satisfaction of an interrupt indication
condition for each warning.
SETTING
Warning indication timing and time can be set.
Alert
Setting values for travel time, and low ambient te mperature can be adjusted to meet the user's needs.
Maintenance
Setting values for engine oil, oil filter, tire, and other maintenance items can be adjusted to meet the user's
needs.
Options
Setting values for unit and effect items can be adjusted to meet the user's needs.
Operating condition
Ignition switch ON
Mileage More than value set in “SETTING”
Signal name Signal path
Ignition signal —
Vehicle speed signal ABS actuator and electric unit (control unit) Combination meter
Signal name Signal path
Ignition signal —
Illumination control switch signal (+) Trip reset and illumination control switch Combination meter
Illumination control switch signal ( −)
Setting item Setting range Setting unit
Alert Timer No setting, 0.5 h - 6 h 0.5 h
ICY ON/OFF —
Setting item Setting range
Maintenance Tire
No setting, 500 km - 30,000 km
(No setting, 250 mile - 18,500 mile)
Filter No setting, 500 km - 30,000 km
(No setting, 250 mile - 18,500 mile)
Oil No setting, 500 km - 30,000 km
(No setting, 250 mile - 18,500 mile)
Other No setting, 500 km - 30,000 km
(No setting, 250 mile - 18,500 mile)
Revision: 2010 May2011 QX56