2011 INFINITI QX56 tire pressure

C1716, C1717, C1718, C1719 TRANSMITTER (PRESSURE DATA)
WT-37
< DTC/CIRCUIT DIAGNOSIS >
C
DF
G H
I
J
K L
M A
B
WT
N
O P
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 >
C
DF
G H
I
J
K L
M A
B
WT
N
O P
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

C1729 VEHICLE SPEED SIGNALWT-41
< DTC/CIRCUIT DIAGNOSIS >
C
DF
G H
I
J
K L
M A
B
WT
N
O P
C1729 VEHICLE SPEED SIGNAL
DTC LogicINFOID:0000000006225516
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Drive for 3 minutes at a speed of 40 km/h (25 MPH) or more without stopping.
2. Stop the vehicle.
3. Perform self-diagnosis for “AIR PRESSURE MONITOR”.
Is DTC
“C1729” detected?
YES >> Proceed to WT-41, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006225517
1.PERFORM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS
With CONSULT-III
Perform self-diagnosis for “ABS”.
Is any DTC detected?
YES >> Check malfunctioning circuit.
NO >> GO TO 2.
2.PERFORM SELF-DIAGNOSIS AGAIN
With CONSULT-III
Perform “DTC CONFIRMATION PROCEDURE” (self-diagnosis) again. Refer to WT-41, "
DTC Logic".
Is DTC
“C1729” detected?
YES >> Replace the low tire pressure warning control unit. Refer to WT-65, "Removal and Installation".
NO >> GO TO 3.
3.CHECK LOW TIRE PRESSURE WARNING CONTROL UNIT INPUT/OUTPUT SIGNAL
Check the low tire pressure warning control unit input/output signal values. Refer to WT-14, "
Reference
Va l u e".
Is the inspection result normal?
YES >> Check pin terminal and connection of each harness connector for malfunctioning conditions.
NO >> Replace the low tire pressure warning control unit. Refer to WT-65, "
Removal and Installation".
DTC Display Item Malfunction detected condition Possible causes
C1729 VHCL SPEED SIG ERR Vehicle speed signal not detected. CAN communication malfunction
 Low tire pressure warning control
unit malfunction
 ABS actuator and electric unit (control unit) malfunction
Revision: 2010 May2011 QX56

WT-42
< DTC/CIRCUIT DIAGNOSIS >
C1750, C1751, C1752, C1753 RECEIVER
C1750, C1751, C1752, C1753 RECEIVER
DTC LogicINFOID:0000000006225518
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
“C1750”, “C1751”, “C1752”, or “C1753” detected?
YES >> Proceed to WT-42, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006225519
1.CHECK TIRE PRESSURE RE CEIVER 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
DTC Display Item Malfunction detected condition Possible causes
C1750 [RECEIVER ERR] FL The front LH tire pressure receiver dose not re-
ceive a signal.
Tire pressure receiver mal-
function
C1751 [RECEIVER ERR] FR
The front RH tire pressure receiver dose not re-
ceive a signal.
C1752 [RECEIVER ERR] RR The rear RH tire pressure receiver dose not re-
ceive a signal.
C1753 [RECEIVER ERR] RL The rear LH tire pressure
receiver dose not receive
a signal.
Low tire pressure warning control unit
— Value (Approx.)
Connector Terminal
M96 3
Ground
Approx. 4.5 V
4
5
6
OCC3879D
Revision: 2010 May2011 QX56

C1750, C1751, C1752, C1753 RECEIVER
WT-43
< DTC/CIRCUIT DIAGNOSIS >
C
D F
G H
I
J
K L
M A
B
WT
N
O P
WHEN SIGNAL IS RECEIVED
Is the inspection result normal?
YES >> Check connector for loose connection and t hen perform “DTC CONFIRMATION PROCEDURE”
(self-diagnosis) again. Refer to WT-42, "
DTC Logic".
NO >> GO TO 2.
2.CHECK TIRE PRESSURE RECE IVER 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 malfunctioning 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 malfunctioning harness or connector.
4.CHECK FOR CHANGE TO THE TIRE PRESSURE RECEIVER INSTALLATION POSITION (EXAMPLE:
FRONT LH RECEIVER OK/NG JUDGMENT) NOTE:
Example: Front LH tire pressure receiver OK/NG judgment when DTC “C1750” is detected.
Low tire pressure warning control unit
— Value (Approx.)
Connector Terminal
M96 3
Ground
Approx. 4.5 V
4
5
6
OCC3880D
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

WT-44
< DTC/CIRCUIT DIAGNOSIS >
C1750, C1751, C1752, C1753 RECEIVER
With CONSULT-III
1. Exchange the positions of the front LH tire pressure receiver and the front RH tire pressure receiver.
2. Perform “DTC CONFIRMATION PROCE DURE” (self-diagnosis) again. Refer to WT-42, "
DTC Logic".
Is DTC
“C1751” detected?
YES >> Replace the exchanged front RH tire pressure receiver.
NO >> Check the low tire pressure warning control unit circuit. Refer to WT-45, "
Diagnosis Procedure".
Revision: 2010 May2011 QX56