2008 INFINITI QX56 tire pressure

WCS-64
< ECU DIAGNOSIS >
BCM (BODY CONTROL MODULE)
CONSULT displayFail-safeIntelligent Key
warning lamp ON Tire pressure
monitor warning lamp ON Reference page
No DTC is detected.
further testing
may be required. ————
U1000: CAN COMM CIRCUIT ———BCS-30
U1010: CONTROL UNIT (CAN) ———BCS-31
B2190: NATS ANTENNA AMP ———SEC-29
B2191: DIFFERENCE OF KEY ———SEC-32
B2192: ID DISCORD BCM-ECM ———SEC-33
B2193: CHAIN OF BCM-ECM ———SEC-35
B2552: INTELLIGENT KEY ———SEC-37
B2590: NATS MALFUNCTION ———SEC-38
C1704: LOW PRESSURE FL ———WT-31
C1705: LOW PRESSURE FR ———WT-31
C1706: LOW PRESSURE RR ———WT-31
C1707: LOW PRESSURE RL ———WT-31
C1708: [NO DATA] FL ———WT-14
C1709: [NO DATA] FR ———WT-14
C1710: [NO DATA] RR ———WT-14
C1711: [NO DATA] RL ———WT-14
C1712: [CHECKSUM ERR] FL ———WT-16
C1713: [CHECKSUM ERR] FR ———WT-16
C1714: [CHECKSUM ERR] RR ———WT-16
C1715: [CHECKSUM ERR] RL ———WT-16
C1716: [PRESSDATA ERR] FL ———WT-18
C1717: [PRESSDATA ERR] FR ———WT-18
C1718: [PRESSDATA ERR] RR ———WT-18
C1719: [PRESSDATA ERR] RL ———WT-18
C1720: [CODE ERR] FL ———WT-16
C1721: [CODE ERR] FR ———WT-16
C1722: [CODE ERR] RR ———WT-16
C1723: [CODE ERR] RL ———WT-16
C1724: [BATT VOLT LOW] FL ———WT-16
C1725: [BATT VOLT LOW] FR ———WT-16
C1726: [BATT VOLT LOW] RR ———WT-16
C1727: [BATT VOLT LOW] RL ———WT-16
C1729: VHCL SPEED SIG ERR ———WT-19
C1735: IGNITION SIGNAL ———WT-20
Revision: March 2010 2008 QX56

WT-1
SUSPENSION
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SECTION WT
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O PCONTENTS
ROAD WHEELS & TIRES
BASIC INSPECTION ....... .............................3
DIAGNOSIS AND REPAIR WORKFLOW ..... .....3
Repair Work Flow ................................................ ......3
INSPECTION AND ADJUSTMENT .....................5
Preliminary Check ............................................... ......5
Transmitter Wake Up Operation ...............................5
ID Registration Procedure .........................................6
FUNCTION DIAGNOSIS ...............................8
TPMS .............................................................. .....8
System Diagram .................................................. ......8
System Description ...................................................8
System Component .................................................10
DIAGNOSIS SYSTEM (BCM) ............................11
CONSULT-III Function (BCM) ............................. ....11
Self-Diagnosis (Without CONSULT-III) ...................12
COMPONENT DIAGNOSIS .........................14
C1708 - C1711 DATA FROM TRANSMITTER
NOT BEING RECEIVED ................................. ....
14
Description .......................................................... ....14
DTC Logic ...............................................................14
Diagnosis Procedure ...............................................14
Special Repair Requirement ...................................15
C1712 - C1715, C1720 - C1723, C1724 -
C1727 TRANSMITTER MALFUNCTION ....... ....
16
Description .......................................................... ....16
DTC Logic ...............................................................16
Diagnosis Procedure ...............................................16
Special Repair Requirement ...................................17
C1716 - C1719 TRANSMITTER PRESSURE
MALFUNCTION .............................................. ....
18
Description .......................................................... ....18
DTC Logic ...............................................................18
Diagnosis Procedure ...............................................18
Special Repair Requirement ................................ ....18
C1729 VEHICLE SPEED SIGNAL ....................19
Description ...............................................................19
DTC Logic ................................................................19
Diagnosis Procedure ...............................................19
Special Repair Requirement ....................................19
C1735 IGNITION SIGNAL .................................20
Description ...............................................................20
DTC Logic ................................................................20
Diagnosis Procedure ...............................................20
Special Repair Requirement ....................................20
ECU DIAGNOSIS .........................................21
BCM (BODY CONTROL MODULE) .................21
Reference Value .................................................. ....21
Terminal Layout .......................................................23
Physical Values ................................................... ....23
Wiring Diagram ........................................................29
Self-Diagnosis (With CONSULT-III) ........................31
Self-Diagnosis (Without CONSULT-III) ...................32
SYMPTOM DIAGNOSIS ..............................34
TPMS .................................................................34
Symptom Table ................................................... ....34
LOW TIRE PRESSURE WARNING LAMP
DOES NOT TURN ON .......................................
35
Low Tire Pressure Warning Lamp Does Not Come
On When Ignition Switch Is Turned On ...................
35
LOW TIRE PRESSURE WARNING LAMP
STAYS ON ........................................................
36
Low Tire Pressure Warning Lamp Stays On When
Ignition Switch Is Turned On ............................... ....
36
LOW TIRE PRESSURE WARNING LAMP
BLINKS .............................................................
37
Revision: March 2010 2008 QX56

WT-2
Low Tire Pressure Warning Lamp Flashes When
Ignition Switch Is Turned On ..................................
37
HAZARD WARNING LAMPS FLASH ...............38
Hazard Warning Lamps Flash When Ignition
Switch Is Turned On ............................................ ...
38
"TIRE PRESSURE" INFORMATION IN DIS-
PLAY UNIT DOES NOT EXIST .........................
39
"TIRE PRESSURE" Information in Display Unit
Does Not Exist ..................................................... ...
39
ID REGISTRATION CANNOT BE COMPLET-
ED ......................................................................
40
ID Registration Cannot Be Completed ................ ...40
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... ...
41
NVH Troubleshooting Chart ................................ ...41
PRECAUTION .............................................42
PRECAUTIONS .............................................. ...42
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. ...
42
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ..................................
42
PREPARATION ..........................................44
PREPARATION .............................................. ...44
Special Service Tool ............................................ ...44
Commercial Service Tool ........................................44
ON-VEHICLE MAINTENANCE ..................45
WHEEL ........................................................... ...45
Inspection ............................................................. ...45
ON-VEHICLE REPAIR ...............................46
WHEEL AND TIRE ASSEMBLY .................... ...46
Adjustment ........................................................... ...46
Rotation ...................................................................48
REMOVAL AND INSTALLATION ..............49
REMOVAL AND INSTALLATION .................. ...49
Transmitter (Pressure Sensor) ............................. ...49
SERVICE DATA AND SPECIFICATIONS
(SDS) .......... ................................. ...............
51
SERVICE DATA AND SPECIFICATIONS
(SDS) .............................................................. ...
51
Road Wheel ......................................................... ...51
Tire ..........................................................................51
Revision: March 2010 2008 QX56

WT-4
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORKFLOW
3.SELF-DIAGNOSIS
Perform SELF-DIAGNOSIS. Refer to WT-31, "
Self-Diagnosis (With CONSULT-III)" (with CONSULT-III) or WT-
32, "Self-Diagnosis (Without CONSULT-III)" (without CONSULT-III).
>> GO TO 4
4.SYMPTOM
Check for symptoms. Refer to WT-34, "
Symptom Table".
>> GO TO 5
5.MALFUNCTIONING PARTS
Repair or replace the applicable parts.
>> GO TO 6
6.DRIVE TEST
1. Perform a drive test.
2. Check the low tire pressure warning lamp.
>> GO TO 7
7.SELF-DIAGNOSIS
Perform SELF-DIAGNOSIS. Refer to WT-31, "
Self-Diagnosis (With CONSULT-III)" (with CONSULT-III) or WT-
32, "Self-Diagnosis (Without CONSULT-III)" (without CONSULT-III).
Are any DTC's displayed?
YES >> GO TO 5
NO >> INSPECTION END
Revision: March 2010 2008 QX56

INSPECTION AND ADJUSTMENTWT-5
< BASIC INSPECTION >
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INSPECTION AND ADJUSTMENT
Preliminary CheckINFOID:0000000001735372
1.TIRE PRESSURE
Check all tire pressures. Refer to WT-51, "
Tire".
Do tire pressures match specification?
YES >> GO TO 2.
NO >> Adjust tire pressures to specified value.
2.LOW TIRE PRESSURE WARNING LAMP
Check low tire pressure warning lamp activation.
Does the low tire pressure warning lamp activate for one second when ignition switch is turned ON?
YES >> GO TO 3.
NO >> GO TO WT-35, "
Low Tire Pressure Warning Lamp Does Not Come On When Ignition Switch Is
Turned On".
3.BCM CONNECTOR
1. Disconnect BCM harness connectors.
2. Check terminals for damage or loose connections.
3. Reconnect harness connectors.
Are BCM connectors damaged or loose?
YES >> Repair or replace damaged parts.
NO >> GO TO 4.
4.TRANSMITTER ACTIVATION TOOL
Check battery in transmitter activation tool.
Is transmitter activation tool battery fully charged?
YES >> Perform self-diagnosis. Refer to WT-31, "Self-Diagnosis (With CONSULT-III)".
NO >> Replace battery in transmitter activation tool.
Transmitter Wake Up OperationINFOID:0000000001735373
NOTE:
This procedure must be done after replacement of a low tire pressure warning transmitter or BCM.
New replacement transmitters are provided "asleep" and must first be "woken up" using Transmitter
Activation Tool J-45295 before ID registration can be performed.
1. Turn ignition switch ON. Push the transmitter activation tool against the tire near the front left transmitter. Press the button for
5 seconds. The hazard warning lamps flash per the following
diagram.
2. Repeat this procedure for each tire in the following order: FL, FR, RR, RL. Tool number : (J-45295)
LEIA0036E
Revision: March 2010
2008 QX56

WT-6
< BASIC INSPECTION >
INSPECTION AND ADJUSTMENT
3. When the BCM finishes assigning each tire ID, the BCM flashes the hazard warning lamps and sendsflashing indicator status by CAN according to the following time chart.
4. After completing wake up of all transmitters, make sure low tire pressure warning lamp goes out.
ID Registration ProcedureINFOID:0000000001735374
ID REGISTRATION WITH TRANSMITTER ACTIVATION TOOL
NOTE:
This procedure must be done after replacement of a low tire pressure warning transmitter or BCM.
New replacement transmitters are provided "asleep" and must first be "woken up" using Transmitter
Activation Tool J-45295 before ID registration can be performed.
1. Connect CONSULT-III.
2. Select "ID REGIST" under BCM.
3. Push the transmitter activation tool against the tire near the front left transmitter. Press the button for 5 seconds.
4. Register the IDs in order from FR LH, FR RH, RR RH and RR LH. When ID registration of each wheel has been completed, the hazard warning lamps flash.
5. After completing all ID registrations, press “END” to complete the procedure.
NOTE:
Be sure to register all of the IDs in order from FR LH, FR RH, RR RH, to RR LH, or the self-diagnostic results
display will not function properly.
ID REGISTRATION WITHOUT TRANSMITTER ACTIVATION TOOL
NOTE:
WEIA0177E
Tool number : (J-45295)
LEIA0036E
Step Activation tire position Hazard warning lamp CONSULT-III
1 Front LH
2 times flashing “YET”
↓
“DONE”
2F
ro n t R H
3R ear R H
4 Rear LH
Revision: March 2010 2008 QX56

INSPECTION AND ADJUSTMENTWT-7
< BASIC INSPECTION >
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This procedure must be done after replacement of a low tire pressure warning transmitter or BCM.
New replacement transmitters are provided "asleep" and must first be "woken up" using Transmitter
Activation Tool J-45295 before ID registration can be performed.
1. Connect CONSULT-III.
2. Select "ID REGIST" under BCM.
3. Adjust the tire pressures to the values shown in the table and drive the vehicle at 40 km/h (25 MPH) or
more for a few minutes.
4. After completing all ID registrations, press “END” to complete the procedure.
5. Inflate all tires to proper pressure. Refer to WT-51, "
Tire".
Tire position
Tire pressure kPa (kg/cm2, psi)
Front LH 250 (2.5, 36)
Front RH 230 (2.3, 33)
Rear RH 210 (2.1, 30)
Rear LH 190 (1.9, 27)
Activation tire position CONSULT-III
Front LH “YET”↓
“DONE”
Front RH
Rear RHRear LH
Revision: March 2010 2008 QX56

WT-8
< FUNCTION DIAGNOSIS >
TPMS
FUNCTION DIAGNOSIS
TPMS
System DiagramINFOID:0000000001735375
System DescriptionINFOID:0000000001735376
BODY CONTROL MODULE (BCM)
The BCM is shown with the lower instrument panel LH removed. The
BCM reads the air pressure signal received by the remote keyless
entry receiver, and controls the low tire pressure warning lamp as
shown below. It also has a self-d iagnosis function to detect a system
malfunction.
TRANSMITTER
A sensor-transmitter integrated with a valve is installed in each
wheel, and transmits a detected air pr essure signal in the form of a
radio wave. The radio signal is received by the remote keyless entry
receiver.
REMOTE KEYLESS ENTRY RECEIVER
ALEIA0004GB
Condition Low tire pressure warning lamp
System normal On for 1 second after ignition ON
Tire less than 193 kPa (2.0 kg/cm
2 , 28 psi)
[Flat tire] ON
TPMS malfunction After key ON, flashes once per sec-
ond for 1 minute, then stays ON
LEIA0068E
WEIA0137E
Revision: March 2010 2008 QX56