Infiniti Q45. Manual — part 686
FRONT FOG LAMP
LT-81
C
D
E
F
G
H
I
J
L
M
A
B
LT
TKWM3721E
LT-82
FRONT FOG LAMP
TKWM3722E
FRONT FOG LAMP
LT-83
C
D
E
F
G
H
I
J
L
M
A
B
LT
Terminals and Reference Values for Headlamp Battery Saver Control Unit
NKS0018R
Terminals and Reference Values for BCM
NKS0018S
Terminal
No.
Wire
color
Item
Operation or condition
Reference value
1
W/B
Ignition switch
Ignition switch
OFF or ACC
Approx. 0 V
ON or START
Battery voltage
2
R/Y
Headlamp relay OUT 1
Ignition switch
(with lighting switch
except OFF or 1ST)
OFF
or
ACC
More than 45 seconds after igni-
tion switch is turned OFF or ACC
Battery voltage
Within 45 seconds after ignition
switch is turned OFF or ACC
Approx. 0 V
ON or START
Approx. 0 V
Headlamps illuminate by auto light control.
Approx. 0 V
3
R/B
Headlamp switch 1
Lighting switch
1ST
Approx. 2.4 V
PASS or 2ND
Approx. 0 V
Headlamps illuminate by auto light control.
Approx. 0 V
4
B
Ground
—
Approx. 0 V
7
Y/G
Battery power supply
—
Battery voltage
8
R/Y
Headlamp relay OUT 2
Ignition switch
(with lighting switch
except OFF or 1ST)
OFF
or
ACC
More than 45 seconds after igni-
tion switch is turned OFF or ACC
Battery voltage
With 45 seconds after ignition
switch is turned OFF or ACC
Approx. 0 V
ON or START
Approx. 0 V
Headlamps illuminate by auto light control.
Approx. 0 V
9
R/B
Headlamp switch 2
Lighting switch
1ST
Approx. 2.4 V
PASS or 2ND
Approx. 0 V
Headlamps illuminate by auto light control.
Approx. 0 V
10
W
RAP input signal
Ignition switch
OFF or ACC (After more than 45 seconds
with ignition switch turned OFF or ACC)
Battery voltage
ON or START
Approx. 0 V
11
B
Ground
—
Approx. 0 V
Terminal
No.
Wire
color
Item
Measuring condition
Reference value
Ignition
switch
Operation or condition
5
R/Y
Headlamp relay signal
ON
Lighting switch:
AUTO
Light is applied to optical sensor.
Battery voltage
Light is not applied to optical sensor.
Approx. 0 V
14
R/W
Lighting switch AUTO
signal
ON
Lighting switch
AUTO
Approx. 0 V
OFF
Approx. 8 V
37
W/G
Front door switch
(Passenger side) signal
OFF
Front door switch
(Passenger side)
ON (open)
Approx. 0 V
OFF (close)
Battery voltage
135
W
RAP output signal
OFF
When headlamp battery saver timer is operated
Approx. 0 V
142
W/R
Front door switch
(Driver side) signal
OFF
Front door switch
(Driver side) signal
ON (open)
Approx. 0 V
OFF (close)
Battery voltage
LT-84
FRONT FOG LAMP
Work Flow
NKS0018T
1.
Confirm the symptom or customer complaint.
2.
Understand system description. Refer to
.
3.
Perform the preliminary check. Refer to
4.
Check symptom and repair or replace the cause of malfunction.
5.
Does front fog lamp operate normally? If YES, GO TO 6. If NO, GO TO 4.
6.
INSPECTION END
Preliminary Check
NKS0018U
CHECK POWER SUPPLY AND GROUND CIRCUIT
1.
CHECK FUSE
Check for blown fuses.
Refer to
LT-80, "Wiring Diagram — F/FOG —"
OK or NG
OK
>> GO TO 2.
NG
>> If the fuse is blown be sure to eliminate cause of malfunction before installing new fuse. Refer to
.
2.
CHECK POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect battery saver control unit connector.
3.
Check voltage between battery saver control unit harness con-
nector and ground.
OK or NG
OK
>> GO TO 3.
NG
>> Repair harness or connector.
3.
CHECK GROUND CIRCUIT
Check continuity between battery saver control unit harness connec-
tor and ground.
OK or NG
OK
>> INSPECTION END
NG
>> Repair harness or connector.
Unit
Power source
Fuse No.
Headlamp battery saver control unit
Ignition switch ACC or ON
1
Battery
6
Front fog lamp relay
Battery
78
Terminal
Ignition switch position
(+)
(
−
)
OFF
ACC
ON
Connector
Terminal
M33
1
Ground
Approx. 0V
Approx. 0V
Battery
voltage
M34
7
Battery
voltage
Battery
voltage
Battery
voltage
PKIB1724E
Terminal
Continuity
Connector
Terminal
Ground
M33
4
Yes
M34
11
PKIB1725E
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