2011 INFINITI QX56 TPMS

LAN
SYSTEMLAN-31
< SYSTEM DESCRIPTION > [CAN]
C
D
E
F
G H
I
J
K L
B A
O P
N
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-32
< SYSTEM DESCRIPTION >[CAN]
SYSTEM
Steering calibration signal R T R
Hazard request signalRT
RT
Horn request signal R T
Low tire pressure warning
lamp signal RT
Tire pressure data signal R T
A/C compresso r feedback
signal RRT
Detention switch signal R T R
Engine restart control sig-
nal RT
Front wiper stop position
signal RT
High beam status signal R T
Hood switch signal R T
Low beam status signal R R T
Push-button ignition switch
status signal RT
Starter control relay signal R T
Steering lock unit status
signal RT
CK SUSP indi cator lamp
signal RT
Brake fluid pressure control
signal R
T
BSW warning lamp signal R T
IBA OFF indicator lamp sig-
nal RT
IBA operation signal RT
ICC operation signal R T
ICC warning lamp signal R T
Lane departure warning
lamp signal RT
LDP ON indicator lamp sig-
nal RT
Target yaw moment signal R T
Signal name
ECM
4WD
ABS
TCM
A-BAG
AFSAV
BCM
CGW
HVAC
M&A
STRG
TPMS
IPDM-E ADP
PSB
E-SUS ICC
PWBD
Revision: 2010 May2011 QX56

LAN-82
< DTC/CIRCUIT DIAGNOSIS >[CAN]
TPMS BRANCH LINE CIRCUIT
TPMS BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006220558
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the low tire pressure warning control unit for damage, bend and loose connection (unit side and connector side).
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of low tire pressure warning control unit.
2. Check the resistance between the low tire pressu re warning control unit harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the low tire pressure warning control unit branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the lo w tire pressure warning control unit. Refer to WT-51,
"Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the low tire pressure warning control unit. Refer to WT-65, "Removal and
Installation".
YES (Past error)>>Error was detected in the low tire pressure warning control unit branch line.
NO >> Repair the power supply and the ground circuit.
Low tire pressure warning control unit harness connector Resistance (Ω)
Connector No. Terminal No.
M96 2 1 Approx. 54 – 66
Revision: 2010 May2011 QX56

LAN
TPMS BRANCH LINE CIRCUITLAN-131
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 1)]
C
D
E
F
G H
I
J
K L
B A
O P
N
TPMS BRANCH
LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256254
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cabl e from the negative terminal.
3. Check the terminals and connectors of the low ti re pressure warning control unit for damage, bend and
loose connection (unit side and connector side).
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of low tire pressure warning control unit.
2. Check the resistance between the low tire pressure warning control unit harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the low tire pressure warning control unit branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the lo w tire pressure warning control unit. Refer to WT-51,
"Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the low tire pressure warning control unit. Refer to WT-65, "Removal and
Installation".
YES (Past error)>>Error was detected in the low tire pressure warning control unit branch line.
NO >> Repair the power supply and the ground circuit.
Low tire pressure warning control unit harness connector Resistance (Ω)
Connector No. Terminal No.
M96 2 1 Approx. 54 – 66
Revision: 2010 May2011 QX56

LAN
TPMS BRANCH LINE CIRCUITLAN-157
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
C
D
E
F
G H
I
J
K L
B A
O P
N
TPMS BRANCH
LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256300
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cabl e from the negative terminal.
3. Check the terminals and connectors of the low ti re pressure warning control unit for damage, bend and
loose connection (unit side and connector side).
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of low tire pressure warning control unit.
2. Check the resistance between the low tire pressure warning control unit harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the low tire pressure warning control unit branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the lo w tire pressure warning control unit. Refer to WT-51,
"Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the low tire pressure warning control unit. Refer to WT-65, "Removal and
Installation".
YES (Past error)>>Error was detected in the low tire pressure warning control unit branch line.
NO >> Repair the power supply and the ground circuit.
Low tire pressure warning control unit harness connector Resistance (Ω)
Connector No. Terminal No.
M96 2 1 Approx. 54 – 66
Revision: 2010 May2011 QX56

LAN
TPMS BRANCH LINE CIRCUITLAN-189
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
C
D
E
F
G H
I
J
K L
B A
O P
N
TPMS BRANCH
LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256347
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cabl e from the negative terminal.
3. Check the terminals and connectors of the low ti re pressure warning control unit for damage, bend and
loose connection (unit side and connector side).
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of low tire pressure warning control unit.
2. Check the resistance between the low tire pressure warning control unit harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the low tire pressure warning control unit branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the lo w tire pressure warning control unit. Refer to WT-51,
"Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the low tire pressure warning control unit. Refer to WT-65, "Removal and
Installation".
YES (Past error)>>Error was detected in the low tire pressure warning control unit branch line.
NO >> Repair the power supply and the ground circuit.
Low tire pressure warning control unit harness connector Resistance (Ω)
Connector No. Terminal No.
M96 2 1 Approx. 54 – 66
Revision: 2010 May2011 QX56

LAN-216
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 4)]
TPMS BRANCH LINE CIRCUIT
TPMS BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256387
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the low tire pressure warning control unit for damage, bend and loose connection (unit side and connector side).
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of low tire pressure warning control unit.
2. Check the resistance between the low tire pressu re warning control unit harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the low tire pressure warning control unit branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the lo w tire pressure warning control unit. Refer to WT-51,
"Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the low tire pressure warning control unit. Refer to WT-65, "Removal and
Installation".
YES (Past error)>>Error was detected in the low tire pressure warning control unit branch line.
NO >> Repair the power supply and the ground circuit.
Low tire pressure warning control unit harness connector Resistance (Ω)
Connector No. Terminal No.
M96 2 1 Approx. 54 – 66
Revision: 2010 May2011 QX56

MA-4
< PERIODIC MAINTENANCE >
GENERAL MAINTENANCE
PERIODIC MAINTENANCE
GENERAL MAINTENANCE
Explanation of General MaintenanceINFOID:0000000006287728
General maintenance includes those items which shoul d be checked during the normal day-to-day operation
of the vehicle. They are essential if the vehicle is to continue operating properly. The owners can perform
checks and inspections themselves or have their INFINITI dealers do them.
OUTSIDE THE VEHICLE
The maintenance items listed here should be performed fr om time to time, unless otherwise specified.
INSIDE THE VEHICLE
The maintenance items listed here should be checked on a regular basis, such as when performing periodic maintenance, cleaning the vehicle,
etc.
Item Reference page
Tires Check the pressure with a gauge often and always prior to long distance trips.
Adjust the pressure in all tires, including the spare, to the pressure specified.
Check carefully for damage, cuts or excessive wear. WT-69
Wheel nuts
When checking the tires, make sure no nuts are missing, and check for any
loose nuts. Tighten if necessary. —
Tire rotation Tires should be rotated every 12,000km (7,500 miles). If the vehicle is equipped
with different sized tires in the front and rear, tires cannot be rotated. WT-63
Tire Pressure Moni-
toring System (TPMS)
transmitter compo-
nentsReplace the TPMS transmitter grommet seal, valve core and cap when the tires
are replaced due to wear or age.
WT-66
Wheel alignment and
balanceIf the vehicle should pull to either side while driving on a straight and level road,
or if you detect uneven or abnormal tire wear, there may be a need for wheel
alignment. If the steering wheel or seat vibrates at normal highway speeds,
wheel balancing may be needed. FSU-7
RSU-6
Windshield
Clean the windshield on a regular basis. Check the windshield at least every six
months for cracks or other damage. Repair as necessary. —
Windshield wiper
blades Check for cracks or wear if they do not wipe properly. —
Doors and engine
hood Check that all doors and the engine hood operate smoothly as well as the back
door. Also make sure that all latches lock securely. Lubricate if necessary. Make
sure that the secondary latch keeps the hood from opening when the primary
latch is released.
When driving in areas using road salt or other corrosive materials, check lubri-
cation frequently. MA-34
Lamps
Make sure that the headlamps, stop lamps, tail lamps, turn signal lamps, and
other lamps are all operating properly and installed securely. Also check head-
lamp aim. Clean the headlamps on a regular basis. —
Item
Reference page
Warning lamps and
chimes Make sure that all warning lamps and chimes are operating properly. —
Windshield wiper and
washer Check that the wipers and washer operate properly and that the wipers do not
streak.
—
Windshield defroster Check that the air comes out of the defroster outlets properly and in sufficient
quantity when operating the heater or air conditioner. —
Steering wheel Check that it has the specified play. Check for changes in the steering condi-
tion, such as excessive play, hard steering or strange noises.
Free play: Less than 35 mm (1.38 in) —
Revision: 2010 May2011 QX56