Infiniti Q45. Manual — part 704
STEP LAMP
LT-153
C
D
E
F
G
H
I
J
L
M
A
B
LT
TKWM3719E
LT-154
STEP LAMP
Terminals and Reference Values for BCM
NKS001AA
Terminals and Reference Values for Driver Door Control Unit (LCU01)
NKS001AB
Terminal
No.
Wire
color
Item
Measuring condition
Reference value
Ignition
switch
Operation or condition
17
BR/Y
Data link RX
—
—
—
18
G/B
Data link TX
—
—
—
33
W
Door rock assembly rear LH
(door switch) signal
OFF
Rear LH door switch
ON (open)
Approx. 0 V
OFF (closed)
Battery voltage
37
W/G
Front door switch (passen-
ger side) signal
OFF
Passenger door switch
ON (open)
Approx. 0 V
OFF (closed)
Battery voltage
56
B
Ground
—
—
—
67
G/W
Data line A-3
—
—
—
68
W/B
IGN power supply
ON
—
Battery voltage
105
Y/L
Battery power supply
OFF
—
Battery voltage
113
B
Ground
—
—
—
142
W/R
Front door switch (driver
side) signal
OFF
Driver door switch
ON (open)
Approx. 0 V
OFF (closed)
Battery voltage
143
W/L
Door lock assembly rear RH
(door switch) signal
OFF
Rear RH door switch
ON (open)
Approx. 0 V
OFF (closed)
Battery voltage
Terminal
No.
Wire
color
Item
Measuring condition
Reference value
Ignition
switch
Operation or condition
3
R
Step lamp
OFF
Each door switch
ON (open)
Approx. 0 V
OFF (closed)
Battery voltage
5
G/OR
Local data line
—
—
8
G/W
Data line A-3
—
—
—
14
Y/G
Power source (circuit
breaker)
OFF
—
Battery voltage
15
B
Ground
ON
—
Approx. 0 V
SIIA0591J
STEP LAMP
LT-155
C
D
E
F
G
H
I
J
L
M
A
B
LT
Terminals and Reference Values for Passenger Door Control Unit
NKS001AC
Terminals and Reference Values for Rear LH, RH Door Control Unit
NKS001AD
Work Flow
NKS001AE
1.
Confirm the symptom or customer complaint.
2.
Understand system description. Refer to
3.
Perform preliminary check. Refer to
.
4.
Does the door lock system operate normally? If YES, GO TO 5. If NO, GO TO Power door lock system
in “BODY LOCK & SECURITY SYSTEM (BL)” section.
5.
Find the cause of trouble following the trouble diagnosis chart by symptom and repair or replace as neces-
sary. Refer to
.
6.
Does the total coordinated interior illumination operate normally? If YES, GO TO 7. If NO, GO TO 5.
7.
INSPECTION END
Terminal
No.
Wire
color
Item
Measuring condition
Reference value
Ignition
switch
Operation or condition
6
W/R
Battery power supply
OFF
—
Battery voltage
7
B
Ground
ON
—
Approx. 0 V
8
R
Step lamp
OFF
Each door switch
ON (open)
Approx. 0 V
OFF (closed)
Battery voltage
11
G/OR
Local data line
—
—
SIIA0591J
Termi-
nal No.
Wire
color
Item
Measuring condition
Reference value
Ignition
switch
Operation or condition
6
Y/B
Battery power supply
OFF
—
Battery voltage
7
B
Ground
ON
—
Approx. 0 V
8
R/W
Step lamp
OFF
Each door switch
ON (open)
Approx. 0 V
OFF (closed)
Battery voltage
11
G/OR
Local data line
—
—
SIIA0591J
LT-156
STEP LAMP
Preliminary Check
NKS001AF
CHECK POWER SUPPLY AND GROUND CIRCUIT
1.
CHECK FUSE
Check for blown fuses.
Refer to
LT-148, "Wiring Diagram — STEP/L —"
OK or NG
OK
>> GO TO 2.
NG
>> If fuse or fusible link is blown, be sure eliminate cause of malfunction before installing new fuse or
fusible link. Refer to
2.
CHECK POWER SUPPLY CIRCUIT
1.
Disconnect BCM connector and driver/passenger/rear LH/rear
RH door control unit connectors.
2.
Check voltage between BCM and driver/passenger/rear LH/rear
RH door control unit harness connector, and ground.
OK or NG
OK
>> GO TO 3.
NG
>> Repair harness or connector.
Unit
Power source
Fuse and fusible link No.
BCM
Battery
3
Ignition switch ON or START
1
Driver/passenger/rear LH/rear RH door
control unit
Battery voltage
H
Terminal
Ignition switch position
(+)
(
−
)
OFF
ON
Connector
Terminal
BCM (M4)
105
Ground
Battery
voltage
Battery
voltage
68
Approx. 0 V
Driver door control unit (D8)
14
Battery
voltage
Passenger door control unit
(D39)
6
Rear LH door control unit
(D59)
6
Rear RH door control unit
(D79)
6
PKIA5161E
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