2011 INFINITI QX56 ground

C1708, C1709, C1710, C1711 TRANSMITTER (NO DATA)
WT-35
< DTC/CIRCUIT DIAGNOSIS >
C
DF
G H
I
J
K L
M A
B
WT
N
O P
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

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

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

C1754 LOW TIRE PRESSURE WARNING CONTROL UNIT
WT-45
< DTC/CIRCUIT DIAGNOSIS >
C
D F
G H
I
J
K L
M A
B
WT
N
O P
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

WT-46
< DTC/CIRCUIT DIAGNOSIS >
C1754 LOW TIRE PRESSURE WARNING CONTROL UNIT
3. Check the continuity between the low tire pres sure warning control unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace the ma lfunctioning harness or connector.
3.PERFORM SELF-DIAGNOSIS AGAIN
With CONSULT-III
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. Perform “DTC CONFIRMATION PROCE DURE” (self-diagnosis) again. Refer to WT-45, "
DTC Logic".
Is DTC
“C1754” detected?
YES >> Replace the low tire pressure warning control unit. Refer to WT-65, "Removal and Installation".
NO >> Check for looseness or damage at the harness connec tor pins of the low tire pressure warning
control unit. Repair or replace if necessary.
Low tire pressure warning control unit
— Continuity
Connector Terminal
M96 6
Ground Not existed
22
10
26
5
21 9
25 4
20 8
24 3
19 7
23
Revision: 2010 May2011 QX56

POWER SUPPLY AND GROUND CIRCUITWT-51
< DTC/CIRCUIT DIAGNOSIS >
C
DF
G H
I
J
K L
M A
B
WT
N
O P
POWER SUPPLY AND GROUND CIRCUIT
Diagnosis ProcedureINFOID:0000000006225530
1.CHECK FUSE/FUSIBLE LINK
1. Turn the ignition switch OFF.
2. Check for fusing of the fuse and fusible link at the low tire pressure warning control unit.
- Check the 10 A fuse [No. 3 in fuse block (J/B)]
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace error-detected parts.
2.CHECK LOW TIRE PRESSURE WARNING CONTROL UNIT POWER SUPPLY CIRCUIT
1. Disconnect the low tire pressure warning control unit harness connector.
2. Turn the ignition switch ON. CAUTION:
Never start engine.
3. Check the voltage between the low tire pressure warning control unit and ground.
4. Turn the ignition switch OFF.
5. Check the voltage between the low tire pressure warning control unit and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Check the following. If any items are damaged, repair or replace damaged parts.  Harness for short or open between ignition switch and low tire pressure warning control unit har-ness connector
 Battery voltage.
3.CHECK LOW TIRE PRESSURE WARNI NG CONTROL UNIT GROUND CIRCUIT
1. Turn the ignition switch OFF.
2. Check the continuity between the low tire pressure warning control unit harness connector and ground.
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
Low tire pressure warning control unit —Voltage
Connector Terminal
M96 15 Ground Battery voltage
Low tire pressure warning control unit —Voltage
Connector Terminal
M96 15 Ground 0 V
Low tire pressure warning control unit —Continuity
Connector Terminal
M96 32 Ground Existed
Revision: 2010 May2011 QX56