Infiniti QX56 (Z62). Manual — part 1374
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 then perform “DTC CONFIRMATION PROCEDURE”
(self-diagnosis) again. Refer to
NO
>> GO TO 2.
2.
CHECK TIRE PRESSURE RECEIVER 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 pressure 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 warning 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)
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 PROCEDURE” (self-diagnosis) again. Refer to
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
.
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 Logic
INFOID: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
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006225521
1.
CHECK LOW TIRE PRESSURE WARNING CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT
Perform the trouble diagnosis for power supply and ground circuit. Refer to
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) system malfunction is
detected in the low tire pressure warning
control unit
Low tire pressure warning con-
trol unit malfunction
Low tire pressure warning 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
9
1
25
4
4
B43 (Rear LH)
3
20
2
8
1
24
4
3
B212 (Rear RH)
3
19
2
7
1
23
4
WT-46
< DTC/CIRCUIT DIAGNOSIS >
C1754 LOW TIRE PRESSURE WARNING CONTROL UNIT
3.
Check the continuity between the low tire pressure warning control unit harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace the malfunctioning 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
.
2.
Perform transmitter ID registration for all wheels. Refer to
3.
Perform “DTC CONFIRMATION PROCEDURE” (self-diagnosis) again. Refer to
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 connector 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
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