warning INFINITI QX56 2011 Factory Service Manual

DIAGNOSIS AND REPAIR WORK FLOWWT-25
< BASIC INSPECTION >
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BASIC INSPECTION
DIAGNOSIS AND REPAIR WORK FLOW
Work Flow INFOID:0000000006225501
DETAILED FLOW
1.COLLECT THE INFORMATION FROM THE CUSTOMER
It is also important to clarify customer concerns before starting the inspection. Reproduce the symptom, and
understand it fully. Interview the customer about the concer ns carefully. In some cases, it is necessary to
check the symptoms by driving the vehicle with the customer.
CAUTION:
Customers are not professionals. Never assume“mayb e the customer means...” or “maybe the cus-
tomer mentioned this symptom.
>> GO TO 2.
2.BASIC INSPECTION
1. Turn the ignition switch ON. CAUTION:
Never start the engine.
2. Check the tire pressure for all wheels and adjust to the specified value. Refer to WT-69, "
Tire Air Pres-
sure".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Inspect or repair the tires or wheels.
3.CHECK LOW TIRE PRESSURE WARNING LAMP STATUS
Check low tire pressure warning lamp display.
Does not low tire pressure warning lamp turn OFF?
YES >> GO TO 4.
NO >> GO TO 8.
4.CHECK DTC WITH LOW TIRE PR ESSURE WARNING CONTROL UNIT
With CONSULT-III
Perform the self-diagnosis fo r “AIR PRESSURE MONITOR”.
Is any DTC detected?
YES >> GO TO 5.
NO >> GO TO 8.
5.ERASE DTC MEMORY
With CONSULT-III
1. Record DTC.
2. Erase DTC once.
NOTE:
After erasing DTC record, currently occurr ed DTC can be detected by reading out DTC again.
>> GO TO 6.
6.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
Perform “DTC CONFIRMATION PROCEDURE” (self-diagnosis) with recorded DTC.
If two or more DTCs are detected, refer to WT-17, "
DTC Inspection Priority Chart" and determine trouble diag-
nosis order.
Is any malfunction detected by self-diagnosis?
YES >> GO TO 7.
Revision: 2010 May2011 QX56

ADDITIONAL SERVICE WHEN REPLACING LOW TIRE PRESSURE WARNING
CONTROL UNIT
WT-27
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ADDITIONAL SERVICE WHEN RE PLACING LOW TIRE PRESSURE
WARNING CONTROL UNIT
DescriptionINFOID:0000000006225502
When replacing low tire pressure warning contro l unit, transmitter ID registration is required.
Work ProcedureINFOID:0000000006225503
ADJUST THE NEUTRAL POSITION OF STEERING ANGLE SENSOR
1.PERFORM TRANSMITTER ID REGISTRATION
Perform transmitter ID registration.
>> Refer to WT-29, "
Work Procedure".
Revision: 2010 May2011 QX56

WT-28
< BASIC INSPECTION >
TRANSMITTER WAKE UP OPERATION
TRANSMITTER WAKE UP OPERATION
DescriptionINFOID:0000000006225504
When replacing transmitter, always transmitter wake-up is required.
Work ProcedureINFOID:0000000006225505
1.TRANSMITTER WAKE-UP PROCEDURE
1. Turn the ignition switch ON.
2. Press the transmitter activation tool (J-45295) (1) against the side of the tire at the location closest to the transmitter.
3. Wait until the indicator lamp turns OFF (approximately 5 sec- onds).
CAUTION:
Perform the wake-up procedure starting from the vehicle
front left wheel, then repeat the procedure in the order of
the front right wheel, rear right wheel, and rear left wheel.
4. Check that the low tire pressure warning lamp blinks in the pattern shown as per the following. The pattern
indicates that the transmitter wake- up procedure for the wheel is completed.
5. Check that the hazard warning lamp blink twice w hen the transmitter wake-up procedure for all wheels is
completed.
6. Check that the low tire pressure warning lamp turn s OFF, after the transmitter wake-up procedure is com-
pleted for all wheels and turns OFF.
Is the transmitter wake-up completed?
YES >> Perform the transmitter ID registration procedure. Refer to WT-29, "Work Procedure".
NO >> Perform trouble diagnosis for the transmitter. Refer to WT-33, "
Diagnosis Procedure".
NNEIC0020ZZ
JPEIC0089GB
Revision: 2010 May2011 QX56

ID REGISTRATIONWT-29
< BASIC INSPECTION >
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ID REGISTRATION
DescriptionINFOID:0000000006225506
When replacing or rotating wheels, replacing transmitter or low tire pressure warning control unit, always
transmitter ID registration is required.
Work ProcedureINFOID:0000000006225507
1.CONFIRMATION OF TRANSMITTER ACTIVATION TOOL USE
Check method of ID registration procedure.
Is the transmitter activation tool (J-45295) us ed for the transmitter ID registration procedure?
YES >> GO TO 2.
NO >> GO TO 3.
2.TRANSMITTER ID REGISTRATION PROCEDURE (W ITH THE TRANSMITTER ACTIVATION TOOL)
With CONSULT-III
1. Turn the ignition switch ON.
2. Display the “WORK SUPPORT” screen for “AIR PRESSURE MONITOR” and select “ID REGIST”.
3. Press the transmitter activation tool (J-45295) (1) against the
side of the tire at the location closest to the transmitter.
4. Wait until the indicator lamp turns OFF (approximately 5 sec- onds).
CAUTION:
Perform the ID registration procedure starting from the
vehicle front left wheel, then repeat the procedure in the
order of the front right wheel, rear right wheel, and rear left
wheel.
5. When ID registration is completed, check the following pattern at
each wheel.
6. After the ID registration procedure for all wheels is completed, press “End” to end ID registration, and
check that ID registration for all wheels is completed.
Is the check result normal?
YES >> ID registration END.
NO >> Perform the self-diagnosis for “AIR PRESSURE MONITOR”. Refer to WT-18, "
DTC Index".
3.TRANSMITTER ID REGISTRATION PROCEDURE (WITHOUT THE TRANSMITTER ACTIVATION TOOL)
With CONSULT-III
1. Display the “WORK SUPPORT” screen for “AIR PRESSURE MONITOR” and select “ID REGIST”.
2. Adjust the tire pressure for all wheels to match the list below.
3. Drive the vehicle at a speed at more than 40 km/h (25 MPH) for 3 minutes or more, then perform the
transmitter ID registration procedure.
4. After ID registration for all wheels is completed, press “End” to end ID registration.
Sequence ID registration position Hazard warning lamp CONSULT-III
1 Front LH
2 blinks“Red”
↓
“Green”
2Front RH
3Rear RH
4 Rear LH
NNEIC0020ZZ
Tire position
Tire pressure kPa (kg/cm2, psi)
Front LH 240 (2.4, 34)
Front RH 220 (2.2, 31) Rear RH 200 (2.0, 29)Rear LH 180 (1.8, 26)
Revision: 2010 May2011 QX56

C1708, C1709, C1710, C1711 TRANSMITTER (NO DATA)
WT-33
< DTC/CIRCUIT DIAGNOSIS >
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C1708, C1709, C1710, C1711 TRANSMITTER (NO DATA)
DTC LogicINFOID:0000000006225510
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION
With CONSULT-III
1. Drive for 3 minutes at a speed of 40 km/h (25 MPH) or more, then drive normally for 10 minutes.
2. Stop the vehicle.
3. Perform self-diagnosis for “AIR PRESSURE MONITOR”.
Is DTC
“C1708”, “C1709”, “C1710” or “C1711” detected?
YES >> Proceed to WT-33, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006225511
1.CHECK TIRE PRESSURE SIGNAL
With CONSULT-III
1. Drive for 3 minutes at a speed of 40 km/h (25 MPH) or more, then drive normally for 10 minutes.
2. Stop the vehicle.
3. Select “DATA MONITOR” for “AIR PRESSURE MONITOR” with CONSULT-III.
4. Within 5 minutes after vehicle stopped, read the val ues that are displayed for “AIR PRESS FL”, “AIR
PRESS FR”, “AIR PRESS RR”, and “AIR PRESS RL”.
Are all tire pressures displayed 0 kPa (psi)?
YES >> GO TO 2.
NO >> GO TO 5.
2.CHECK RECEIVER CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect low tire pressure warning control unit harness connector and tire pressure receiver harness connector.
3. Check the continuity between low tire pressure warning control unit harness connector and tire pressure
receiver harness connector.
CHECK RECEIVER POWER CIRCUIT
DTC Display Item Malfunction detected condition Possible causes
C1708 [NO DATA] FL Tire pressure data signal from the front LH wheel
transmitter cannot be detected.
 Harness or connector connec-
tion malfunction
(Tire pressure re ceiver, low tire
pressure warning control unit)
 Transmitter ID registration in-
complete
 Transmitter malfunction
 Transmitter battery voltage
C1709 [NO DATA] FR
Tire pressure data signal from the front RH wheel
transmitter cannot be detected.
C1710 [NO DATA] RR Tire pressure data signal from the rear RH wheel
transmitter cannot be detected.
C1711 [NO DATA] RL Tire pressure data signal from the rear LH wheel
transmitter cannot be detected.
Low tire pressure wa
rning control unit Tire pressure receiver
Continuity
Connector Terminal Connector Terminal
M96 10 E53 (Front LH)
1 Existed
9 E19 (Front RH)
8 B43 (Rear LH)
7 B212 (Rear RH)
Revision: 2010 May2011 QX56

WT-34
< DTC/CIRCUIT DIAGNOSIS >
C1708, C1709, C1710, C1711 TRANSMITTER (NO DATA)
CHECK RECEIVER SIGNAL CIRCUIT
CHECK RECEIVER SIGNAL (SENSITIVITY) CIRCUIT
CHECK RECEIVER GROUND CIRCUIT
4. Check the continuity between low tire pressure warning control unit harness connector and ground.
CHECK RECEIVER POWER CIRCUIT
CHECK RECEIVER SIGNAL CIRCUIT
CHECK RECEIVER SIGNAL (SENSITIVITY) CIRCUIT
Low tire pressure warning control unit Tire pressure receiver
Continuity
Connector Terminal Connector Terminal
M96 6 E53 (Front LH)
3 Existed
5 E19 (Front RH)
4 B43 (Rear LH)
3 B212 (Rear RH)
Low tire pressure wa rning control unit Tire pressure receiver
Continuity
Connector Terminal Connector Terminal
M96 22 E53 (Front LH)
2 Existed
21 E19 (Front RH)
20 B43 (Rear LH)
19 B212 (Rear RH)
Low tire pressure wa rning control unit Tire pressure receiver
Continuity
Connector Terminal Connector Terminal
M96 26 E53 (Front LH)
4 Existed
25 E19 (Front RH)
24 B43 (Rear LH)
23 B212 (Rear RH)
Low tire pressure
warning control unit
—Continuity
Connector Terminal
M96 10
Ground Not existed
9
8
7
Low tire pressure warning control unit
—Continuity
Connector Terminal
M96 6
Ground Not existed
5
4
3
Low tire pressure warning control unit
—Continuity
Connector Terminal
M96 22
Ground Not existed
21
20
19
Revision: 2010 May2011 QX56

C1708, C1709, C1710, C1711 TRANSMITTER (NO DATA)
WT-35
< DTC/CIRCUIT DIAGNOSIS >
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CHECK RECEIVER GROUND CIRCUIT
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace the malfunctioning harness or connector.
3.CHECK TIRE PRESSURE RECE IVER POWER SUPPLY CIRCUIT
1. Connect low tire pressure warning control unit harness connector.
2. Turn the ignition switch ON. CAUTION:
Never start the engine.
3. Check the voltage between tire pressure receiver harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Replace the low tire pressure warning control unit. Refer to WT-65, "
Removal and Installation".
4.TIRE PRESSURE RECEIVER SIGNAL
Check tire pressure receiver signal. Refer to WT-42, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace error-detected parts.
5.TRANSMITTER ID REGISTRATION
Perform transmitter ID registration. Refer to WT-29, "
Work Procedure".
Is transmitter ID registration completed?
YES >> GO TO 6.
NO >> Replace applicable transmitter. Refer to WT-66, "
Removal and Installation".
6.CHECK TIRE PRESSURE SIGNAL
With CONSULT-III
1. Drive for 3 minutes at a speed of 40 km/h (25 MPH) or more, then drive normally for 10 minutes.
2. Stop the vehicle.
3. Select “DATA MONITOR” for “AIR PRESSURE MONITOR” with CONSULT-III.
4. Within 15 minutes after vehicle stopped, check t hat the tire pressures match the standard value.
Is the inspection result normal?
Low tire pressure warning control unit
—Continuity
Connector Terminal
M96 26
Ground Not existed
25
24
23
Tire pressu
re receiver
—Voltage
Connector Terminal
E53 (Front LH)
1 Ground Approx. 9 - 16 V
E19 (Front RH)
B43 (Rear LH)
B212 (Rear RH)
Monitor item Displayed value
AIR PRESS FL Approximately equal to the indication on tire gauge value for front LH tire
AIR PRESS FR Approximately equal to the indication on tire gauge value for front RH tire
AIR PRESS RR Approximately equal to the indica tion on tire gauge value for rear RH tire
AIR PRESS RL Approximately equal to the indication on tire gauge value for rear LH tire
Revision: 2010 May2011 QX56

WT-36
< DTC/CIRCUIT DIAGNOSIS >
C1708, C1709, C1710, C1711 TRANSMITTER (NO DATA)
YES >> INSPECTION END
NO >> Replace the low tire pressure warning control unit. Refer to WT-65, "
Removal and Installation".
Revision: 2010 May2011 QX56

C1716, C1717, C1718, C1719 TRANSMITTER (PRESSURE DATA)
WT-37
< DTC/CIRCUIT DIAGNOSIS >
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C1716, C1717, C1718, C1719 TRAN SMITTER (PRESSURE DATA)
DTC LogicINFOID:0000000006225512
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION
With CONSULT-III
1. Turn the ignition switch ON.
CAUTION:
Never start the engine.
2. Check the tire pressure for all wheels and adjust to the specified value. Refer to WT-69, "
Tire Air Pres-
sure".
3. Perform self-diagnosis for “AIR PRESSURE MONITOR”.
Is DTC
“C1716”, “C1717”, “C1718”, or “C1719” detected?
YES >> Proceed to WT-37, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006225513
1.CHECK TIRE PRESSURE
Check the air pressure of all wheels. Refer to WT-69, "
Tire Air Pressure".
Is the inspection result normal?
YES >> Replace the DTC-detected malfunctioning transmitter. Refer to WT-66, "Removal and Installa-
tion".
NO >> After adjusting the air pressure, GO TO 2.
2.CHECK TIRE PRESSURE SIGNAL
With CONSULT-III
DTC Display Item Malfunction detected condition Possible causes
C1716 [PRESSDATA ERR] FL Malfunction in the tire pressure data from the
front LH wheel transmitter.
NOTE:
In this case the low tire pressure warning
control unit judges that the tire pressure is
438.60 kPa (4.47 kg/cm
2, 63.60 psi).
 Transmitter ID registration in-
complete
 Transmitter malfunction
C1717 [PRESSDATA ERR] FR
Malfunction in the tire pressure data from the
front RH wheel transmitter.
NOTE:
In this case the low tire pressure warning
control unit judges that the tire pressure is
438.60 kPa (4.47 kg/cm
2, 63.60 psi).
C1718 [PRESSDATA ERR] RR Malfunction in the tire pressure data from the
rear RH wheel transmitter.
NOTE:
In this case the low tire pressure warning
control unit judges that the tire pressure is
438.60 kPa (4.47 kg/cm
2, 63.60 psi).
C1719 [PRESSDATA ERR] RL Malfunction in the tire pressure data from the
rear LH wheel transmitter.
NOTE:
In this case the low tire pressure warning
control unit judges that the tire pressure is
438.60 kPa (4.47 kg/cm
2, 63.60 psi).
Revision: 2010 May2011 QX56

C1728 RECEIVER IDWT-39
< DTC/CIRCUIT DIAGNOSIS >
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C1728 RECEIVER ID
DTC LogicINFOID:0000000006225514
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION
With CONSULT-III
1. Drive for 3 minutes at a speed of 40 km/h (25 MPH) or more, then drive normally for 10 minutes.
2. Stop the vehicle.
3. Perform self-diagnosis for “AIR PRESSURE MONITOR”.
Is DTC
“C1728” detected?
YES >> Proceed to WT-39, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006225515
1.CHECK TIRE PRESSURE RECEIVER INPUT SIGNAL
1. Turn the ignition switch ON. CAUTION:
Never start engine.
2. Use an oscilloscope and check the input signal waveform between the low tire pressure warning control
unit harness connector and ground.
STANDBY STATUS
WHEN SIGNAL IS RECEIVED
Is the inspection result normal?
DTC Display Item Malfunction detected condition Possible causes
C1728 RECEIVER ID NO REG Receiver ID registration cannot be performed.  Tire pressure receiver malfunc-
tion
 Low tire pressure warning con- trol unit malfunction
Low tire pressure warning control unit — Value (Approx.)
Connector Terminal
M96 3
Ground
Approx. 4.5 V
4
5
6
Low tire pressure warning control unit — Value (Approx.)
Connector Terminal
M96 3
Ground Approx. 4.5 V
4
5
6
OCC3879D
OCC3880D
Revision: 2010 May2011 QX56