Infiniti Q45. Manual — part 905
TROUBLE DIAGNOSIS FOR SYSTEM
WT-29
C
D
F
G
H
I
J
K
L
M
A
B
WT
TROUBLE DIAGNOSIS FOR SYSTEM
PFP:00000
Power Supply Circuit
NES000D7
LOW TIRE PRESSURE WARNING CONTROL UNIT TERMINALS AND REFERENCE VALUE
Data are reference value and are measured between each terminal and ground.
CAUTION:
When using a circuit tester to measure voltage for inspection, be sure not to extend forcibly any connector terminals.
DIAGNOSTIC PROCEDURE
1.
CHECK POWER SUPPLY
1.
Turn ignition switch “OFF”.
2.
Disconnect low tire pressure warning control unit harness connector.
3.
Check voltage between low tire pressure warning control unit
harness connector (A) terminals and ground.
4.
Turn ignition switch “ON”. (Do not start engine.)
5.
Check voltage between low tire pressure warning control unit
harness connector (A) terminals and ground.
OK or NG
OK
>> GO TO 2.
NG
>> Check the following. If any items are damaged, repair or
replace damaged parts.
●
10A fuses [No. 1, 6, 21 located in the fuse block (J/B) No.1]. Refer to
●
Harness for short or open between battery and low tire pressure warning control unit harness
connector M84 terminal 1.
●
Harness for short or open between ignition switch and low tire pressure warning control unit
harness connector M84 terminals 2 and 4.
●
Battery and ignition switch. Refer to
.
Terminal
Wire
color
Item
Condition
Data (Approx.)
1
Y/G
Power supply
(Memory back-up)
Ignition switch: ON
Battery voltage
Ignition switch: OFF
Battery voltage
2
BR/W
Power supply
Ignition switch: ON
Battery voltage
Ignition switch: OFF
0 V
4
L/OR
Power supply
Ignition switch: ACC
Battery voltage
Ignition switch: OFF
0 V
11
B
Ground
Always
0 V
Connector
Terminal
Voltage (Approx.)
M84
1 - Ground
Battery voltage
2 - Ground
0 V
4 - Ground
SEIA0746E
Connector
Terminal
Voltage (Approx.)
M84
1 - Ground
Battery voltage
2 - Ground
4 - Ground
SEIA0747E
WT-30
TROUBLE DIAGNOSIS FOR SYSTEM
2.
CHECK GROUND CIRCUIT
1.
Turn ignition switch “OFF”.
2.
Disconnect low tire pressure warning control unit harness connector.
3.
Check continuity between low tire pressure warning control unit
harness connector (A) M84 terminals 11.
Also check harness for short to power.
OK or NG
OK
>> INSPECTION END
NG
>> Repair open circuit or short to power in harness or con-
nectors.
Continuity should exist.
SEIA0748E
TROUBLE DIAGNOSIS FOR SYSTEM
WT-31
C
D
F
G
H
I
J
K
L
M
A
B
WT
Transmitter (NO DATA)
NES000DF
●
Check the following if “[NO DATA] FL”, “[NO DATA] FR”, “[NO DATA] RR” or “[NO DATA] RL” is detected in
self-diagnosis results with CONSULT-II or “flickering pattern for 21, 22, 23 or 24” is detected in self-diag-
nosis results without CONSULT-II.
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Data are reference value.
DIAGNOSTIC PROCEDURE
1.
CHECK AIR PRESSURE SIGNAL
With CONSULT-II
1.
Start engine.
2.
Select “DATA MONITOR” mode for “AIR PRESSURE MONITOR” with CONSULT-II.
3.
Read out the value of “AIR PRESS FL”, “AIR PRESS FR”, “AIR
PRSEE RR” and “AIR PRESS RL”.
Are all tire pressures displayed 0 kPa?
YES >> GO
TO
2.
NO
>> GO TO 4.
2.
CHECK ANTENNA CONNECTOR
Check antenna and feeder connector B183 for damage or loose connections.
OK or NG
OK
>> Check low tire pressure warning control unit pin terminals for damage or loose connection with
harness connector. If any items are damaged, repair or replace damaged parts.
NG
>> Repair or replace antenna or feeder connector.
Monitored item
Content
Condition
Display value
AIR PRESS FL [kPa],
[kg/cm
2
] or [psi]
Condition of front LH tire
air pressure
Just after the engine is started
0 kPa (0 kg/cm
2
, 0 psi)
Start engine and drive at 40 km/h (25 MPH) or more
for several minutes.
Approximately equal to
the indication on tire
gauge value
AIR PRESS FR [kPa],
[kg/cm
2
] or [psi]
Condition of front RH tire
air pressure
Just after the engine is started
0 kPa (0 kg/cm
2
, 0 psi)
Start engine and drive at 40 km/h (25 MPH) or more
for several minutes.
Approximately equal to
the indication on tire
gauge value
AIR PRESS RR [kPa],
[kg/cm
2
] or [psi]
Condition of rear LH tire
air pressure
Just after the engine is started
0 kPa (0 kg/cm
2
, 0 psi)
Start engine and drive at 40 km/h (25 MPH) or more
for several minutes.
Approximately equal to
the indication on tire
gauge value
AIR PRESS RL [kPa],
[kg/cm
2
] or [psi]
Condition of rear RH tire
air pressure
Just after the engine is started
0 kPa (0 kg/cm
2
, 0 psi)
Start engine and drive at 40 km/h (25 MPH) or more
for several minutes.
Approximately equal to
the indication on tire
gauge value
Monitored item
Condition
Display value
AIR PRESS FL
Start engine and drive at 40 km/h (25 MPH)
or more for several minutes.
0 kPa
AIR PRESS FR
AIR PRESS RR
AIR PRESS RL
SEIA0749E
WT-32
TROUBLE DIAGNOSIS FOR SYSTEM
3.
CHECK ID REGISTRATION
Perform the ID registration of all transmitters. Refer to
WT-24, "ID Registration Procedure"
.
Can ID registration of all transmitters be completed?
YES
>> GO TO 4.
NO
>> Replace malfunctioning transmitter then GO TO 5.
4.
CHECK LOW TIRE PRESSURE WARNING SYSTEM
1.
Drive at a speed of 40 km/h (25 MPH) or more for several minutes without stopping.
2.
Check all tire pressures with CONSULT-II “DATA MONITOR ITEM” within 15 minutes after vehicle speed
becomes 17 km/h (11 MPH).
Does “DATA MONITOR ITEM” displayed the standardized value without turning low tire pressure warning
lamp ON?
YES
>> INSPECTION END
NO
>> Replace low tire pressure warning control unit.
5.
CHECK ID REGISTRATION
1.
Perform the ID registration of all transmitters. Refer to
WT-24, "ID Registration Procedure"
2.
Drive at a speed of 40 km/h (25 MPH) or more for 3 minutes, and then drive the vehicle at any speed for
10 minutes. Then check all tire pressures with CONSULT-II “DATA MONITOR ITEM” within 5 minutes.
Does “DATA MONITOR ITEM” displayed the standardized value without turning low tire pressure warning
lamp ON?
YES
>> INSPECTION END
NO
>> Perform the self-diagnosis, inspect detected malfunction.
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