2011 INFINITI QX56 display

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

C1729 VEHICLE SPEED SIGNALWT-41
< DTC/CIRCUIT DIAGNOSIS >
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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

C1754 LOW TIRE PRESSURE WARNING CONTROL UNIT
WT-45
< DTC/CIRCUIT DIAGNOSIS >
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C1754 LOW TIRE PRESSURE WARNING CONTROL UNIT
DTC LogicINFOID:0000000006225520
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 without stopping.
2. Stop the vehicle.
3. Perform self-diagnosis for “AIR PRESSURE MONITOR”.
Is DTC
“C1754” detected?
YES >> Proceed to WT-45, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006225521
1.CHECK LOW TIRE PRESSURE WARNING CONT ROL UNIT POWER SUPPLY AND GROUND CIRCUIT
Perform the trouble diagnosis for power supply and ground circuit. Refer to WT-51, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace error-detected parts.
2.CHECK TIRE PRESSURE RECEIVER CIRCUIT
1. Disconnect the tire pressure receiver harness connector.
2. Check the continuity between the low tire pressure warning control unit harness connector and tire pres-
sure receiver harness connector.
DTC Display Item Malfunction detected condition Possible causes
C1754 CONT UNIT (EEPROM) Memory (EEPROM) syst
em malfunction is
detected in the low tire pressure warning
control unit Low tire pressure warning con-
trol unit malfunction
Low tire pressure wa
rning control unit Tire pressure receiver
Continuity
Connector Terminal Connector Terminal
M96 6
E53 (Front LH) 3
Existed
22 2
10 1
26 4
5
E19 (Front RH) 3
21 2 91
25 4 4
B43 (Rear LH) 3
20 2 81
24 4 3
B212 (Rear RH) 3
19 2 71
23 4
Revision: 2010 May2011 QX56

C1755, C1756, C1757, C1758 POOR RECEIVING CONDITIONS
WT-47
< DTC/CIRCUIT DIAGNOSIS >
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C1755, C1756, C1757, C1758 PO OR RECEIVING CONDITIONS
DTC LogicINFOID:0000000006225522
DTC DETECTION LOGIC
CAUTION:
If DTC C1755, C1756, C1757, or C1758 is detected al ong with, C1708, C1709, C1710, or C1711 first diag-
nose C1755, C1756, C1757, or C1758.
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
“C1755”, “C1756”, “C1757”, or “C1758 ” detected?
YES >> Proceed to WT-47, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006225523
1.TRANSMITTER ID REGISTRATION
Perform transmitter ID registration. Refer to WT-29, "
Work Procedure".
Is transmitter ID registration completed?
YES >> GO TO 2.
NO >> Change the work location and perform ID registration again, then proceed to WT-60,
"DiagnosisProcedure".
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.
DTC Display Item Malfunction detected condition Possible causes
C1755 PR RECEIV COND FL The data signal from the front LH wheel transmitter cannot be
detected due to external electromagnetic interference for 10
minutes or more.
(DTC C1708 is displayed at the same time.)
External electromagnetic
interference
C1756 PR RECEIV COND FR
The data signal from the front RH wheel transmitter cannot be
detected due to external electromagnetic interference for 10
minutes or more.
(DTC C1709 is displayed at the same time.)
C1757 PR RECEIV COND RR The data signal from the rear RH wheel transmitter cannot be
detected due to external electromagnetic interference for 10
minutes or more.
(DTC C1710 is displayed at the same time.)
C1758 PR RECEIV COND RL The data signal from the rear LH wheel transmitter cannot be
detected due to external electromagnetic interference for 10
minutes or more.
(DTC C1711 is displayed at the same time.)
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
Revision: 2010 May2011 QX56

WT-48
< DTC/CIRCUIT DIAGNOSIS >
C1755, C1756, C1757, C1758 POOR RECEIVING CONDITIONS
Is the inspection result normal?
YES >> GO TO 3.
NO >> Change the work location, then GO TO 1.
3.CHECK SELF-DIAGNOSIS RESULTS
With CONSULT-III
1. Erase the self-diagnosis memory for the low tire pressure warning control unit.
2. Turn ignition switch OFF, and wait for 10 seconds or more.
3. Perform “DTC CONFIRMATION PROCE DURE” (self-diagnosis) again. Refer to WT-47, "
DTC Logic".
Are DTC
“C1755”, “C1756”, “C1757”, or “C1758” and “C1708”, “C1709”, “C1710”, or “C1711” detected?
YES >> Change the work location, then GO TO 1.
NO >> Check the input/output signal values. Refer to WT-14, "
Reference Value".
AIR PRESS RR Approximately equal to the indica tion on tire gauge value for rear RH tire
AIR PRESS RL Approximately equal to the indicati on on tire gauge value for rear LH tire
Monitor item Displayed value
Revision: 2010 May2011 QX56