Infiniti Q45. Manual — part 907
TROUBLE DIAGNOSIS FOR SYSTEM
WT-37
C
D
F
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M
A
B
WT
DIAGNOSTIC PROCEDURE
1.
CHECK VEHICLE SPEED SENSOR
With CONSULT-II
1.
Start engine.
2.
Select “DATA MONITOR” mode for “AIR PRESSURE MONITOR” with CONSULT-II.
3.
Read out the value of “VHCL SPEED SE”.
Without CONSULT-II
1.
Start engine.
2.
Check signal between low tire pressure warning control unit har-
ness connector (A) terminal and ground with oscilloscope.
OK or NG
OK >> GO
TO
4.
NG
>> GO TO 2.
2.
CHECK COMBINATION METER
1.
Turn ignition switch “OFF”.
2.
Disconnect low tire pressure warning control unit harness connector.
3.
Check signal between combination meter harness connector (A)
terminal and ground with oscilloscope.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 3.
NG
>> Check combination meter. Refer to
.
Condition
Display value
Vehicle stopped
0 km/h (0 MPH)
Vehicle running
CAUTION:
Check air pressure of tire under standard condition.
Approximately equal to
the indication on speed-
ometer (Inside of
±
10%)
SGIA1404E
Connector
Terminal
Condition
Data (Approx.)
M84
10 -
Ground
Vehicle speed:
40 km/h (25 MPH)
SEIA0763E
ELF1080D
Connector
Terminal
Condition
Data (Approx.)
M41
17 -
Ground
Vehicle speed:
40 km/h (25 MPH)
SEIA0764E
ELF1080D
WT-38
TROUBLE DIAGNOSIS FOR SYSTEM
3.
CHECK HARNESS BETWEEN LOW TIRE PRESSURE WARNING CONTROL UNIT AND COMBINA-
TION METER
1.
Turn ignition switch “OFF”.
2.
Disconnect low tire pressure warning control unit harness connector and the combination meter harness
connector.
3.
Check continuity between low tire pressure warning control unit
harness connector (A) M84 terminal 10 and combination meter
harness connector (B) M41 terminal 17.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace damaged parts.
4.
CHECK LOW TIRE PRESSURE WARNING CONTROL UNIT
Check low tire pressure warning control unit input/output signal. Refer to
WT-17, "Low Tire Pressure Warning
Control Unit Input/Output Signal Reference Values"
.
OK or NG
OK
>> GO TO 5.
NG
>> 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.
5.
CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK
>> INSPECTION END
NG
>> Replace low tire pressure warning control unit. Refer to
WT-49, "Removal and Installation"
Continuity should exist.
SEIA0765E
TROUBLE DIAGNOSIS FOR SYSTEM
WT-39
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A
B
WT
Component Inspection
NES000HK
COMBINATION FLASHER UNIT
1.
Turn ignition switch “OFF”.
2.
Remove combination flasher unit. Refer to
3.
Check resistance between the following terminals.
●
Combination flasher unit connector (A) terminals 1 and 7.
●
Combination flasher unit connector (A) terminals 4 and 6.
4.
Apply 12 V direct current to combination flasher unit connector
(A) terminals 1 and 4 (positive), and to terminals 6 and 7 (nega-
tive).
5.
Check voltege between combination flasher unit connector (A)
terminals 3, 8 (positive) and battery (negative).
6.
If NG, replace combination flasher unit.
Terminal
Resistance (Approx.)
1 – 7
89 k
Ω
4 – 6
78
Ω
SEIA0785E
Terminal
Condition
Voltege
(Approx.)
3 (positive) – battery (negative)
With terminal 6 connected with
negative terminal of battery.
6 V
Without terminal 6 connected with
negative terminal of battery.
0 V
8 (positive) – battery (negative)
With terminal 6 connected with
negative terminal of battery.
6 V
Without terminal 6 connected with
negative terminal of battery.
0 V
SEIA0786E
WT-40
TROUBLE DIAGNOSIS FOR SYMPTOMS
TROUBLE DIAGNOSIS FOR SYMPTOMS
PFP:00007
Low Tire Pressure Warning Lamp Does Not Turn ON for Approx.1 Second When
Ignition Switch Is Turned ON
NES0007H
DIAGNOSTIC PROCEDURE
1.
CHECK COMBINATION METER POWER SUPPLY CIRCUIT
1.
Turn ignition switch “OFF”.
2.
Disconnect combination meter harness connector.
3.
Check voltage between combination meter harness connector
(A) terminal and ground.
4.
Turn ignition switch “ON”. (Do not start engine.)
5.
Check voltage between combination meter harness connector
(A) terminal and ground.
OK or NG
OK >> GO
TO
2.
NG
>> Check the following. If any items are damaged, repair or
replace damaged parts.
●
10A fuse [No. 6, 9, located in the fuse block (J/B) No.1]. Refer to
●
Harness for short or open between battery and combination meter harness connector M43 ter-
minal 57.
●
Harness for short or open between ignition switch and combination meter harness connector
M43 terminal 59.
●
Connector
Terminal
Voltage (Approx.)
M43
57 - Ground
Battery voltage
59 - Ground
0 V
SEIA0773E
Connector
Terminal
Voltage (Approx.)
M43
57 - Ground
Battery voltage
59 - Ground
SEIA0774E
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