INFINITI QX56 2011 Factory Service Manual

C1704, C1705, C1706, C1707 LOW TIRE PRESSURE
WT-31
< DTC/CIRCUIT DIAGNOSIS >
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DTC/CIRCUIT DIAGNOSIS
C1704, C1705, C1706, C1707 LOW TIRE PRESSURE
DTC LogicINFOID:0000000006225508
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
“C1704”, “C1705”, “C1706”, or “C1707” detected?
YES >> Proceed to WT-31, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006225509
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
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, check t hat the tire pressures match the standard value.
Is the inspection result normal?
YES >> INSPECTION END
DTC Display Item Malfunction detected condition Possible causes
C1704 LOW PRESSURE FL Front LH wheel pressure drops to 189 kPa (1.93 kg/cm
2, 27.4 psi)
or less
Low tire pressure
C1705 LOW PRESSURE FR
Front RH wheel pressure drops to 189 kPa (1.93 kg/cm
2, 27.4 psi)
or less
C1706 LOW PRESSURE RR Rear RH wheel pressure drops to 189 kPa (1.93 kg/cm
2, 27.4 psi)
or less
C1707 LOW PRESSURE RL Rear LH wheel pressure drops to 189 kPa (1.93 kg/cm
2, 27.4 psi) or
less
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-32
< DTC/CIRCUIT DIAGNOSIS >
C1704, C1705, C1706, C1707 LOW TIRE PRESSURE
NO >> Repair or replace error-detected parts.
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
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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

WT-38
< DTC/CIRCUIT DIAGNOSIS >
C1716, C1717, C1718, C1719 TRANSMITTER (PRESSURE DATA)
1. Check the tire pressure for all wheels and adjust to the specified value. Refer to WT-69, "Tire Air Pres-
sure".
2. Perform transmitter ID registration for all wheels. Refer to WT-29, "
Work Procedure".
3. Drive for 3 minutes at a speed of 40 km/h (25 MPH) or more, then drive normally for 10 minutes.
4. Stop the vehicle.
5. Select “DATA MONITOR” for “AIR PR ESSURE MONITOR” with CONSULT-III.
6. Within 15 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”.
Which tire pressures is displayed as 438.60 kPa (4.47 kg/cm
2, 63.60 psi)?
YES >> Replace transmitter the tire pressure as 438.60 kPa (4.47 kg/cm2, 63.60 psi) displayed. Refer to
WT-66, "
Removal and Installation".
NO >> Perform “DTC CONFIRMATION PROCEDURE” (self-diagnosis) again. Refer to WT-37, "
DTC
Logic".
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

WT-40
< DTC/CIRCUIT DIAGNOSIS >
C1728 RECEIVER ID
YES >> Check connector for loose connection and then perform “DTC CONFIRMATION PROCEDURE”
(self-diagnosis) again. Refer to WT-39, "
DTC Logic".
NO >> GO TO 2.
2.CHECK TIRE PRESSURE RECEI VER POWER SUPPLY CIRCUIT
1. Disconnect the tire pressure receiver 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 3.
NO >> Repair or replace the ma lfunctioning harness or connector.
3.CHECK TIRE PRESSURE RECEIVER GROUND 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.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace the ma lfunctioning harness or connector.
4.CHECK LOW TIRE PRESSURE WARNING CONTROL UNIT CIRCUIT
Check the low tire pressure warning control unit circuit. Refer to WT-45, "
Diagnosis Procedure".
Is the low tire pressure warning control unit circuit normal?
YES >> Replace the tire pressure receiver. Refer to WT-68, "FRONT TIRE PRESSURE RECEIVER :
Removal and Installation" (Front), WT-68, "REAR TIRE PRESSURE RECEIVER : Removal and
Installation" (Rear).
NO >> Repair or replace error-detected parts.
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)
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)
Revision: 2010 May2011 QX56