tire pressure INFINITI QX56 2011 Factory Repair Manual

WCS-18
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (COMBINATION METER)
4WD W/L Lighting history of 4WD warning lamp.
FUEL W/L Lighting history of low fuel level warning.
WASHER W/L Lighting history of low washer fluid warning.
AIR PRES W/L Lighting history of low tire pressure warning lamp.
KEY G/Y W/L Lighting history of KEY warning lamp.
KEY R W/L This item is displayed, but cannot be monitored.
KEY KNOB W/L This item is displa yed, but cannot be monitored.
EPS W/L This item is displayed, but cannot be monitored.
e-4WD This item is displayed, but cannot be monitored.
AFS OFF IND This item is displayed, but cannot be monitored.
4WAS/RAS W/L This item is displayed, but cannot be monitored.
HDC W/L This item is displayed, but cannot be monitored.
SYS FAIL W/L This item is displa yed, but cannot be monitored.
SFT POSI W/L This item is displayed, but cannot be monitored.
HV BAT W/L This item is displayed, but cannot be monitored.
HEV BRAKE W/L This item is displayed, but cannot be monitored.
SFT OPER W/L This item is displayed, but cannot be monitored.
LANE W/L Lighting history of lane departure warning lamp.
CHAGE W/L This item is displayed, but cannot be monitored.
OIL LEV LOW This item is displayed, but cannot be monitored.
DPF W/L This item is displayed, but cannot be monitored.
TRAILER IND This item is displayed, but cannot be monitored.
RUN FLAT W/L This item is displa yed, but cannot be monitored.
E-SUS W/L This item is displayed, but cannot be monitored.
LAUNCH CNT W/L This item is displayed, but cannot be monitored.
BRAKE PAD W/L This item is displa yed, but cannot be monitored.
Display item Description
Revision: 2010 May2011 QX56

WCS
COMBINATION METERWCS-23
< ECU DIAGNOSIS INFORMATION >
C
DE
F
G H
I
J
K L
M B A
O P
LIGHT IND Ignition switch
ONTail lamp indicator lamp ON On
Tail lamp indicator lamp OFF Off
OIL W/L Ignition switch
ONOil pressure warning lamp ON On
Oil pressure warning lamp OFF Off
MIL Ignition switch
ONMalfunction indicator lamp ON On
Malfunction indicator lamp OFF Off
GLOW IND Ignition switch
ONNOTE:
This item is displayed, but cannot be moni-
tored.
Off
CRUISE IND Ignition switch
ONCRUISE indicator ON On
CRUISE indicator OFF Off
SET IND Ignition switch
ONSET indicator ON On
SET indicator OFF Off
CRUISE W/L Ignition switch
ONCRUISE warning lamp ON On
CRUISE warning lamp OFF Off
BA W/L Ignition switch
ONIBA OFF indicator lamp ON On
IBA OFF indicator lamp OFF Off
AT C / T - A M T W / L Ignition switch
ONA/T check warning lamp ON On
A/T check warning lamp OFF Off
ATF TEMP W/L Ignition switch
ONNOTE:
This item is displayed, but cannot be moni-
tored.
Off
4WD W/L Ignition switch
ON4WD warning lamp ON On
4WD warning lamp OFF Off
FUEL W/L Ignition switch
ONDuring low fuel warning indication On
Other than the above Off
WASHER W/L Ignition switch
ONDuring low washer fluid warning indication On
Other than the above Off
AIR PRES W/L Ignition switch
ONLow tire pressure
warning lamp ON On
Low tire pressure warning lamp OFF Off
KEY G/Y W/L Ignition switch
ONKEY warning lamp (G
reen/Yellow) ON On
KEY warning lamp (G reen/Yellow) OFF Off
KEY KNOB W/L Ignition switch
ONNOTE:
This item is displayed, but cannot be moni-
tored.
Off
AFS OFF IND Ignition switch
ONAFS OFF indicator lamp ON On
AFS OFF indicator lamp OFF Off
DDS W/L Ignition switch
ONNOTE:
This item is displayed, but cannot be moni-
tored.
Off
LANE W/L Ignition switch
ONLane departure warning lamp ON On
Lane departure warning lamp OFF Off
LDP IND Ignition switch
ONLDP ON indicator lamp ON On
LDP ON indicator lamp OFF Off
AT P W / L Ignition switch
ONATP warning lamp ON On
AT P w a r n i n g l a m p O F F O f f
Monitor Item Condition Value/Status
Revision: 2010 May2011 QX56

WCS-30
< ECU DIAGNOSIS INFORMATION >
COMBINATION METER
DTC Index
INFOID:0000000006222690
Warning lamp/indicator lamp ABS warning lamp
The lamp turns ON by suspending communication.
VDC warning lamp
Brake warning lamp
IBA OFF indicator lamp
4WD warning lamp
Malfunction indicator lamp
VDC OFF indicator lamp
CRUISE warning lamp
Low tire pressure warning lamp The lamp blinking caused by suspending communication.
High beam indicator lamp
The lamp turns OFF by suspending communication.
Turn signal indicator lamp
Tail lamp indicator lamp
A/T CHECK indicator lamp
Key warning lamp
ATP warning lamp
Lane departure warning lamp
LDP ON indicator lamp
CRUISE indicator lamp
Oil pressure warning lamp
SNOW mode indicator lamp
TOW mode indicator lamp
CK SUSP indicator lamp
BSW indicator lamp
Function Specifications
Display contents of CONSULT-III Diagnostic item is detected when... Refer to
CAN COMM CIRCUIT
[U1000] When combination meter is not transmitting or receiving CAN communication signal
for 2 seconds or more. MWI-59,
"Diagnosis
Procedure"
CONTROL UNIT (CAN)
[U1010]
When detecting error during the initial diagnosis of the CAN controller of combina-
tion meter. MWI-60, "Diagnosis
Procedure"
VEHICLE SPEED
[B2205]
The abnormal vehicle sp
eed signal is input from the ABS actuator and electric unit
(control unit) for 2 seconds or more. MWI-61, "Diagnosis
Procedure"
ENGINE SPEED
[B2267]
If ECM continuously transmits abnormal engine speed signals for 2 seconds or
more. MWI-62, "Diagnosis
Procedure"
WATER TEMP
[B2268]
If ECM continuously transmits abnormal engine coolant temperature signals for 60
seconds or more. MWI-63, "Diagnosis
Procedure"
Revision: 2010 May2011 QX56

WT-1
SUSPENSION
C
DF
G H
I
J
K L
M
SECTION WT
A
B
WT
N
O PCONTENTS
ROAD WHEELS & TIRES
PRECAUTION ................ ...............................3
PRECAUTIONS .............................................. .....3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
3
Precaution Necessary for Steering Wheel Rota-
tion after Battery Disconnect .....................................
3
Service Notice or Precautions for TPMS ...................4
Service Notice or Precautions for Road Wheel .........4
PREPARATION ............................................5
PREPARATION .............................................. .....5
Special Service Tools .......................................... ......5
Commercial Service Tools ........................................5
SYSTEM DESCRIPTION ..............................6
COMPONENT PARTS ................................... .....6
Component Parts Location .................................. ......6
Component Description .............................................7
Low Tire Pressure Warning Control Unit ...................7
Transmitter ................................................................7
Tire Pressure Receiver .............................................8
Low Tire Pressure Warning Lamp .............................8
SYSTEM ..............................................................9
System Description ............................................. ......9
Tire Inflation Indicator Function ...............................10
DIAGNOSIS SYSTEM (LOW TIRE PRES-
SURE WARNING CONTROL UNIT) ..................
12
CONSULT-III Function ........................................ ....12
ECU DIAGNOSIS INFORMATION ..............14
LOW TIRE PRESSURE WARNING CON-
TROL UNIT ..................................................... ....
14
Reference Value ................................................. ....14
DTC Inspection Priority Chart .................................17
DTC Index ...............................................................18
WIRING DIAGRAM ......................................19
TIRE PRESSURE MONITORING SYSTEM ......19
Wiring Diagram .................................................... ....19
BASIC INSPECTION ...................................25
DIAGNOSIS AND REPAIR WORK FLOW .......25
Work Flow ............................................................ ....25
ADDITIONAL SERVICE WHEN REPLACING
LOW TIRE PRESSURE WARNING CON-
TROL UNIT ........................................................
27
Description ...............................................................27
Work Procedure .......................................................27
TRANSMITTER WAKE UP OPERATION .........28
Description ...............................................................28
Work Procedure .......................................................28
ID REGISTRATION ...........................................29
Description ...............................................................29
Work Procedure .......................................................29
DTC/CIRCUIT DIAGNOSIS .........................31
C1704, C1705, C1706, C1707 LOW TIRE
PRESSURE .......................................................
31
DTC Logic ............................................................ ....31
Diagnosis Procedure ...............................................31
C1708, C1709, C1710, C1711 TRANSMITTER
(NO DATA) ........................................................
33
DTC Logic ............................................................ ....33
Diagnosis Procedure ...............................................33
C1716, C1717, C1718, C1719 TRANSMITTER
(PRESSURE DATA) ..........................................
37
DTC Logic ............................................................ ....37
Diagnosis Procedure ...............................................37
C1728 RECEIVER ID ........................................39
Revision: 2010 May2011 QX56

WT-2
DTC Logic ...............................................................39
Diagnosis Procedure ..............................................39
C1729 VEHICLE SPEED SIGNAL ....................41
DTC Logic ............................................................ ...41
Diagnosis Procedure ..............................................41
C1750, C1751, C1752, C1753 RECEIVER ........42
DTC Logic ............................................................ ...42
Diagnosis Procedure ..............................................42
C1754 LOW TIRE PRESSURE WARNING
CONTROL UNIT ................................................
45
DTC Logic ............................................................ ...45
Diagnosis Procedure ..............................................45
C1755, C1756, C1757, C1758 POOR RE-
CEIVING CONDITIONS .....................................
47
DTC Logic ............................................................ ...47
Diagnosis Procedure ..............................................47
U1000 CAN COMM CIRCUIT ............................49
Description ........................................................... ...49
DTC Logic ...............................................................49
Diagnosis Procedure ..............................................49
U1010 CONTROL UNIT (CAN) .........................50
Description ........................................................... ...50
DTC Logic ...............................................................50
Diagnosis Procedure ..............................................50
POWER SUPPLY AND GROUND CIRCUIT .....51
Diagnosis Procedure ........................................... ...51
LOW TIRE PRESSURE WARNING LAMP .......52
Component Function Check ................................ ...52
Diagnosis Procedure ..............................................52
SYMPTOM DIAGNOSIS .............................53
TPMS SYMPTOMS ......................................... ...53
Symptom Table ................................................... ...53
LOW TIRE PRESSURE WARNING LAMP
DOES NOT TURN ON .......................................
56
Description ........................................................... ...56
Diagnosis Procedure ..............................................56
LOW TIRE PRESSURE WARNING LAMP
DOES NOT TURN OFF .....................................
57
Description ........................................................... ...57
Diagnosis Procedure ..............................................57
LOW TIRE PRESSURE WARNING LAMP
BLINKS ..............................................................
58
Description ........................................................... ...58
Diagnosis Procedure ............................................ ...58
TIRE INFLATION INDICATOR DOES NOT
ACTIVATE .........................................................
59
Description ........................................................... ...59
Diagnosis Procedure ...............................................59
ID REGISTRATION CANNOT BE COMPLET-
ED ......................................................................
60
Description ........................................................... ...60
Diagnosis Procedure ..............................................60
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ............................
61
NVH Troubleshooting Chart ................................. ...61
PERIODIC MAINTENANCE .......................62
ROAD WHEEL ................................................ ...62
Adjustment ........................................................... ...62
Tire Rotation ...........................................................63
REMOVAL AND INSTALLATION ..............64
ROAD WHEEL TIRE ASSEMBLY ................. ...64
Exploded View ..................................................... ...64
Removal and Installation .........................................64
Inspection ................................................................64
LOW TIRE PRESSURE WARNING CON-
TROL UNIT ........................................................
65
Exploded View ..................................................... ...65
Removal and Installation .........................................65
TRANSMITTER .................................................66
Exploded View ..................................................... ...66
Removal and Installation .........................................66
TIRE PRESSURE RECEIVER ...........................68
Exploded View ..................................................... ...68
FRONT TIRE PRESSURE RECEIVER .................. ...68
FRONT TIRE PRESSURE RECEIVER : Removal
and Installation ........................................................
68
REAR TIRE PRESSURE RECEIVER .......................68
REAR TIRE PRESSURE RECEIVER : Removal
and Installation ..................................................... ...
68
SERVICE DATA AND SPECIFICATIONS
(SDS) .......... ................................................
69
SERVICE DATA AND SPECIFICATIONS
(SDS) .............................................................. ...
69
Road Wheel ......................................................... ...69
Tire Air Pressure .....................................................69
Revision: 2010 May2011 QX56

WT-4
< PRECAUTION >
PRECAUTIONS
5. When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button igniti on switch is turned to LOCK position.)
6. Perform self-diagnosis check of all control units using CONSULT-III.
Service Notice or Precautions for TPMSINFOID:0000000006225485
 Low tire pressure warning lamp blinks for 1min, then turns ON when occurring any malfunction except low tire pressure. Erase the self-diagnosis memories for low tire pressure warning control unit, or register the ID
to turn low tire pressure warning lamp OFF. For ID registration, refer to WT-29, "
Work Procedure".
 ID registration is required when replacing or rotating wheel s, replacing transmitter or low tire pressure warn-
ing control unit. Refer to WT-29, "
Work Procedure".
 Replace grommet seal, valve core and cap of transmitter in TPMS, when replacing each tire by reaching the
wear limit. Refer to WT-66, "
Exploded View".
 For tire inflation indicator function, refer to the following.
- When inflating the tires, park the vehicle in the safe area and ensure the safety of the working area.
- Read and understand the tire inflation indicator function prior to use.
- Inflate the tires one at a time.
- If there is no response for approximately 15 seconds or mo re after inflating the tires, cancel the use of the
tire inflation indicator function or move the vehicle approximately 1 m (3.2 ft) backward or forward to try
again. The air filler pressure may be weak or out of service area.
- Despite the high-precision TPMS pressure sensor, an i ndicated value may differ from that of the pressure
gauge.
- Air pressure is measured rather high due to the rise in tire air temperature after driving.
- If TPMS is malfunctioning, the tire inflation indicator is unusable.
Service Notice or Precautions for Road WheelINFOID:0000000006225486
 Genuine NISSAN aluminum wheel is designed for each type of vehicle. Use it on the specified vehicle only.
 Use Genuine NISSAN parts for the wheel nuts.
 Always use them after adjusting the wheel balance. For the balance weights, use Genuine NISSAN alumi-
num wheel weights.
 Use caution when handling the aluminum wheels, because they can be easily scratched. When removing
dirt, do not use any abrasives, a wire brush, or other it ems that may scratch the coating. Use a neutral deter-
gent if a detergent is needed.
 After driving on roads scattered with anti-ici ng salts, wash off the wheels completely.
 When installing road wheels onto the vehicle, always wipe of f any dirt or foreign substances to prevent them
from being trapped between the contact surfaces of wheel.
 Never apply oil to nut and bolt threads.
Revision: 2010 May2011 QX56

WT-6
< SYSTEM DESCRIPTION >
COMPONENT PARTS
SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts LocationINFOID:0000000006225488
1. BCMRefer to BCS-4, "
BODY CONTROL
SYSTEM : Component Parts Loca-
tion". 2. AV control unit
Refer to AV- 9 , "
Component Parts Lo-
cation". 3. ABS actuator and electric unit (con-
trol unit)
Refer to BRC-10, "Component Parts
Location".
4. TCM
*
Refer to TM-10, "A/T CONTROL SYS-
TEM : Component Parts Location" .5. Low tire pressure warning control
unit 6. Transmitter
7. Front tire pressure receiver 8. Rear tire pressure receiver
A. Glove box assembly removed B. Wheel C. Fender protector (rear side)
D. Low tire pressure warning lamp (in
combination meter) E. Inside rear wheel house protector
*: Mainly used for the tire inflation indicator function.
JPEIC0069ZZ
Revision: 2010 May2011 QX56

COMPONENT PARTSWT-7
< SYSTEM DESCRIPTION >
C
DF
G H
I
J
K L
M A
B
WT
N
O P
Component DescriptionINFOID:0000000006225489
*: Mainly used for the tire inflation function.
Low Tire Pressure Warning Control UnitINFOID:0000000006225490
 After the low tire pressure warning control unit (1) receives the tire pressure signal from the tire pressure receiver, it controls the oper-
ation of the low tire pressure warning lamp, hazard warning lamp,
and horn.
NOTE:
The hazard warning lamp and the horn are used for the tire infla-
tion indicator function.
 Performs self-diagnosis of the Tire Pressure Monitoring System
(TPMS).
 Controls tire inflation indicator function.
TransmitterINFOID:0000000006225491
The transmitter (1) is installed at the position of the air valve on the
road wheel (2). It measures the ti re pressure and transmits the tire
pressure information by radio waves.
Component parts Reference/Function
Transmitter WT-7, "
Transmitter"
Tire pressure receiverWT-8, "Tire Pressure Receiver"
Low tire pressure warning control unit WT-7, "Low Tire Pressure Warning Control Unit"
Low tire pressure warning lamp WT-8, "Low Tire Pressure Warning Lamp"
AV control unit AV- 1 0 , "Component Description"
BCMBCS-6, "BODY CONTROL SYSTEM : System Description"
ABS actuator and electric unit (control unit)BRC-16, "System Description"
TCM*TM-10, "A/T CONTROL SYSTEM : Component Parts Location"
JPEIC0071ZZ
: Outside
JPEIC0013ZZ
Revision: 2010 May2011 QX56

WT-8
< SYSTEM DESCRIPTION >
COMPONENT PARTS
Tire Pressure Receiver
INFOID:0000000006225492
The front tire pressure receiver (1) and rear tire pressure receiver (2)
receive the tire pressure signal by radio waves from the transmitter
at each wheel, and transmit the tire pressure signal to the low tire
pressure warning control unit.
Low Tire Pressure Warning LampINFOID:0000000006225493
Uses CAN communication from the low tire pressure warning control
unit to illuminate the low tire pressure warning lamp on the combina-
tion meter.
*: Tire pressure at each condition differs. A: Front side
B : Rear side
JPEIC0070ZZ
NNEIC0001ZZ
Condition Low tire pr
essure warning lamp
Ignition switch: OFF OFF
Ignition switch: ON Warning lamp turns on for 1second, then turns OFF.
When tire pressure is low*.
[Less than 189 kPa (1.93 kg/cm
2, 27.4 psi)] ON
Tire pressure monitoring system malfunction Warning lamp blinks 1 minute, then turns ON.
Revision: 2010 May2011 QX56

SYSTEMWT-9
< SYSTEM DESCRIPTION >
C
DF
G H
I
J
K L
M A
B
WT
N
O P
SYSTEM
System DescriptionINFOID:0000000006225494
 During driving, the TPMS (Tire Pressure Monitoring System) receives the signal transmitted from transmitter
installed in each wheel. The low tire pressure warning control unit has pressure judgment and trouble diag-
nosis functions. When the low tire pressure warning control unit detects low inflation pressure or another
unusual symptom, the low tire pressure warning lamps in the combination meter comes on.
 If the tire pressure is less than the specified value, t he low tire pressure warning lamp illuminates that the tire
pressure is less than the specified value.
 Activates the TPMS (Tire Pressure Monitoring Sy stem) when the vehicle speed is 40 km/h (25 MPH) or
more.
 The tire pressure information for each wheel is displayed on the vehicle information display.
 Added tire inflation indicator function to TPMS (Tire Pressure Monitoring System). Refer to WT-10, "
Tire
Inflation Indicator Function".
SYSTEM DIAGRAM
INPUT/OUTPUT SIGNAL
The signal transmission/reception between units via a comm unication line is mainly as listed in the following
table.
JPEIC0084GB
Component parts Signal item
Low tire pressure warning control
unit Transmits the following signals via CAN communication to BCM.
 Low tire pressure
warning lamp signal
 Hazard request signal
 Horn request signal*
Transmits the following signals via CAN communication to the AV control unit.
 Low tire pressure warning lamp signal
 Tire pressure data signal
BCM Transmits the following signal via CAN communication to the combination meter, based on sig-
nals from low tire pressure warning control unit.
 Low tire pressure
warning lamp signal
Transmits the following signal via CAN communication to the IPDM E/R, based on signals from
low tire pressure wa rning control unit.
 Horn request signal*
Receives the following signal via CAN communication from low tire pressure warning control
unit.
 Hazard request signal
AV control unit Receives the following signals via CAN communication from low tire pressure warning control
unit.
 Low tire pressure
warning lamp signal
 Tire pressure data signal
Revision: 2010 May2011 QX56