Infiniti FX35 / FX45. Manual - part 814

INTERIOR ROOM LAMP

LT-151

< SERVICE INFORMATION >

C

D

E

F

G

H

I

J

L

M

A

B

LT

N

O

P

TKWM4319E

LT-152

< SERVICE INFORMATION >

INTERIOR ROOM LAMP

TKWM4320E

INTERIOR ROOM LAMP

LT-153

< SERVICE INFORMATION >

C

D

E

F

G

H

I

J

L

M

A

B

LT

N

O

P

Terminal and Reference Value for BCM

INFOID:0000000001328410

Terminal

No.

Wire 

color

Signal name

Measuring condition

Reference value

Ignition 

switch

Operation or condition

1

PU

Ignition keyhole illumi-
nation signal

OFF

Ignition keyhole
illumination

Illuminated

Battery voltage

Not illuminated

Approx. 0 V

12

P/B

Front door switch (pas-
senger) signal

OFF

Front door switch 
(passenger side)

ON (open)

Approx. 0 V

OFF (closed)

Approx. 7.5 - 8.0 V

13

P/L

Rear door switch RH 
signal

OFF

Rear door switch 
RH

ON (open)

Approx. 0 V

OFF (closed)

Battery voltage

22

OR

Power window switch 
serial link

—

Power window 
main switch (door 
lock and unlock 
switch) and power 
window sub-
switch (front pas-
senger side) (door 
lock and unlock 
switch)

Lock or unlock switch 
ON
NOTE:
Approx. 10 seconds 
after door lock and un-
lock switch (driver side 
and passenger side) is 
turned “LOCK” or “UN-
LOCK”.

Approx. 9.0 - 9.5 V

OFF

Battery voltage

37

B/W

Key-in detection switch 
signal

OFF

Vehicle key is removed.

Approx. 0 V

Vehicle key is inserted.

Battery voltage

38

W/L

Ignition power supply

ON

—

Battery voltage

39

L

CAN 

−

 

H

—

—

—

40

P

CAN 

−

 

L

—

—

—

41

R/B

Battery saver output 
signal

OFF

30 minutes after ignition switch is turned to 
OFF

Approx. 0 V 

ON

—

Battery voltage

42

L/R

Battery power supply

OFF

—

Battery voltage

47

Y/R

Step lamp signal

OFF

Any door is open (ON)

Approx. 0 V

All doors are closed (OFF)

Battery voltage

48

PU/W

Interior room lamp, 
map lamp, front door 
inside handle and rear 
door inside handle illu-
mination output signal

OFF

Any door switch

ON (open)

Approx. 0 V

OFF (closed)

Battery voltage

49

B

Ground

ON

—

Approx. 0 V

52

B

Ground

ON

—

Approx. 0 V

55

G

Battery power supply

OFF

—

Battery voltage

58

L

Back door switch sig-
nal

OFF

Back door closure 
motor (door 
switch)

ON (open)

Approx. 0 V

OFF (closed)

Battery voltage

SKIB3419J

PKIC0930E

LT-154

< SERVICE INFORMATION >

INTERIOR ROOM LAMP

How to Proceed with Trouble Diagnosis

INFOID:0000000001328411

1.

Confirm the symptom or customer complaint.

2.

Understand operation description and function description. Refer to 

LT-138, "System Description"

.

3.

Perform Preliminary Check. Refer to 

LT-154, "Preliminary Check"

.

4.

Check symptom and repair or replace the cause of malfunction.

5.

Does interior room lamp operate normally? If YES, GO TO 6. If NO, GO TO 4.

6.

INSPECTION END

Preliminary Check

INFOID:0000000001328412

CHECK FOR POWER SUPPLY AND GROUND CIRCUIT

1.

CHECK FUSES

Check for blown fuses.

Refer to 

LT-145, "Wiring Diagram - ROOM/L -"

.

OK or NG

OK

>> GO TO 2.

NG

>> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to 

PG-

3

.

2.

CHECK POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect BCM connector.

3.

Check voltage between BCM harness connector and ground.

OK or NG

62

W

Front door switch (driv-
er side) signal

OFF

Front door switch 
(driver side)

ON (open)

Approx. 0 V

OFF (closed)

Approx. 7.0 - 7.5 V

63

P

Rear door switch LH 
signal

OFF

Rear door switch 
LH

ON (open)

Approx. 0 V

OFF (closed)

Battery voltage

Terminal

No.

Wire 

color

Signal name

Measuring condition

Reference value

Ignition 

switch

Operation or condition

PKIB4960J

Unit

Power source

Fuse and fusible link No.

BCM

Battery

M

22

Ignition switch ON or START position

1

(+)

(-)

Ignition switch position

BCM con-

nector

Terminal

OFF

ON

M3

38

Ground

Approx. 0 V

Battery voltage

M4

42

Battery voltage

Battery voltage

55

Battery voltage

Battery voltage

PKIA7520E