Infiniti QX56 (Z62). Manual — part 1376
POWER SUPPLY AND GROUND CIRCUIT
WT-51
< DTC/CIRCUIT DIAGNOSIS >
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POWER SUPPLY AND GROUND CIRCUIT
Diagnosis Procedure
INFOID: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 WARNING 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
WT-52
< DTC/CIRCUIT DIAGNOSIS >
LOW TIRE PRESSURE WARNING LAMP
LOW TIRE PRESSURE WARNING LAMP
Component Function Check
INFOID:0000000006225531
1.
CHECK LOW TIRE PRESSURE WARNING LAMP OPERATION
Check that the low tire pressure warning lamp is turned OFF after turns ON for approximately 1 second, when
the ignition switch is turned ON.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
.
Diagnosis Procedure
INFOID:0000000006225532
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.
PERFORM LOW TIRE PRESSURE WARNING CONTROL UNIT SELF-DIAGNOSIS
With CONSULT-III
1.
Drive for several minutes at a speed of 40 km/h (25 MPH) or more.
2.
Stop the vehicle.
3.
Perform self-diagnosis for “AIR PRESSURE MONITOR”.
Is any DTC detected?
YES
>> Perform trouble diagnosis for detected DTC. Refer to
.
NO
>> GO TO 3.
3.
CHECK LOW TIRE PRESSURE WARNING LAMP SIGNAL
With CONSULT-III
1.
Turn the ignition switch ON.
CAUTION:
Never start engine.
2.
Select “DATA MONITOR” for “AIR PRESSURE MONITOR” with CONSULT-III.
3.
Read out the value of “WARNING LAMP”. For low tire pressure warning lamp condition, refer to “LOW
TIRE PRESSURE WARNING LAMP CONTROL CONDITION” in
Does the data monitor display change normal?
YES
>> GO TO 4.
NO
>> Replace the low tire pressure warning control unit. Refer to
WT-65, "Removal and Installation"
4.
CHECK COMBINATION METER POWER SUPPLY CIRCUIT
Perform the trouble diagnosis for combination meter power supply circuit. Refer to
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair or replace error-detected parts.
TPMS SYMPTOMS
WT-53
< SYMPTOM DIAGNOSIS >
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SYMPTOM DIAGNOSIS
TPMS SYMPTOMS
Symptom Table
INFOID:0000000006225533
LOW TIRE PRESSURE WARNING LAMP SYMPTOM CHART
WT-54
< SYMPTOM DIAGNOSIS >
TPMS SYMPTOMS
Diagnosis
items
Symptom
(Ignition switch ON)
Low tire pressure warning lamp
Cause
Action
Low tire
pressure
warning
lamp
The low tire pressure
warning lamp illumi-
nates for 1 second,
then turns OFF.
Wake-up operation for all
transmitters at wheels is
completed.
No procedure.
(No system malfunctions)
The low tire pressure
warning lamp repeats
blinking ON for 2 sec-
onds and OFF for 0.2
seconds.
Wake-up operation for all
transmitters at wheels is not
completed.
Perform the wake-up oper-
ation for all transmitters at
wheels. Refer to
.
The low tire pressure
warning lamp blinks
once.
The front LH wheel trans-
mitter is not activated.
Perform the wake-up oper-
ation for the transmitter at
front LH wheel. Refer to
The low tire pressure
warning lamp repeats
blinking twice.
The front right wheel trans-
mitter is not activated.
Perform the wake-up oper-
ation for the transmitter at
front right wheel. Refer to
The low tire pressure
warning lamp repeats
blinking for 3 times.
The rear right wheel trans-
mitter is not activated.
Perform the wake-up oper-
ation for the transmitter at
rear right wheel. Refer to
The low tire pressure
warning lamp repeats
blinking for 4 times.
The rear LH wheel transmit-
ter is not activated.
Perform the wake-up oper-
ation for the transmitter at
rear LH wheel. Refer to
.
The low tire pressure
warning lamp turns
ON and stays illumi-
nated.
Low tire pressure
Check the tire pressure for
all wheels and adjust to the
specified value. Refer to
SEIA0592E
SEIA0593E
JPEIC0090GB
SEIA0595E
SEIA0596E
SEIA0597E
SEIA0598E
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