Infiniti Q45. Manual - part 700

INTERIOR ROOM LAMP

LT-137

C

D

E

F

G

H

I

J

L

M

A

B

LT

Symptom Chart

NKS0019Z

*1: When BCM input/output signal are normal .

Interior Lamp Illumination Switch System Check

NKS001A0

1. 

CHECK INTERIOR LAMP ILLUMINATION SWITCH SIGNAL 

1.

Turn ignition switch OFF.

2.

Disconnect the BCM connector.

3.

Check continuity between BCM harness connector and ground
while operating interior lamp illumination switch.

OK or NG

OK

>> Interior lamp illumination switch is OK.

NG

>> GO TO 2.

Symptom

Malfunctioning system and reference 

●

Map lamp and personal lamp will not illuminate when the interior lamp illu-
mination switch is turned ON with the personal lamp switch in AUTO posi-
tion.

●

Map lamp and personal lamp will not go out when the interior lamp illumi-
nation switch is turned OFF with the personal lamp switch in AUTO posi-
tion.

●

Interior lamp illumination switch system. Refer to 

LT-

137, "Interior Lamp Illumination Switch System 
Check"

 . 

If above system is normal, replace the BCM.

●

Personal lamp will not illuminate when RH personal lamp switch is turned 
ON with LH personal lamp switch in AUTO position.

●

Personal lamp will not illuminate when LH personal lamp switch is turned 
ON with RH personal lamp switch in AUTO position.

●

Personal lamp switch will not go out when both RH and LH personal lamp 
switches are turned to AUTO position.

●

Personal lamp switch system. Refer to 

LT-138, "Per-

sonal Lamp Switch System Check"

 . 

If above system is normal, replace the BCM.

●

All lamps (except step lamp) will not illuminate in the lamp illumination 
conditions with the interior lamp illumination switch and RH and LH per-
sonal lamp switches in AUTO position.

●

All lamps (except step lamp) will not go out in the lamp off conditions with 
the interior lamp switch and RH and LH personal lamp switches in AUTO 
position.

●

Interior lamp illumination switch system. Refer to 

LT-

137, "Interior Lamp Illumination Switch System 
Check"

 .

●

Door switch system. Refer to 

LT-139, "Door Switch 

System Check"

 .

●

Key-in detection switch system. Refer to 

LT-141, 

"Key Switch and Key Lock Solenoid System Check"

 .

If above system is normal, replace the BCM.

●

Lamps illuminate fully in half illumination conditions.

●

Dimming function will not operate when turning the lamp off.

Replace the BCM.*1

Terminal

Condition

Continuity

Connector

Terminal 

Ground

R4

130

Interior lamp switch ON

Yes

Interior lamp switch OFF 

and AUTO

No

131

Interior lamp switch OFF

Yes

Interior lamp switch OFF 

and AUTO

No

PKIA5139E

LT-138

INTERIOR ROOM LAMP

2. 

CHECK WIRE HARNESS CONTINUITY

1.

Disconnect front interior lamp connector.

2.

Check continuity between BCM harness connector and front
interior lamp harness connector.

3.

Check continuity between BCM harness connector and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Repair harness or connector.

3. 

CHECK GROUND CIRCUIT

Check continuity between front interior lamp harness connector R6
terminal 3 and ground.

OK or NG

OK

>> Check interior lamp illumination switch.

NG

>> Repair harness or connector.

Personal Lamp Switch System Check

NKS001A1

1. 

CHECK PERSONAL LAMP SWITCH SIGNAL

1.

Turn ignition switch OFF.

2.

Disconnect BCM connector.

3.

Check continuity between BCM harness connector R4 terminal
129 and ground while operating personal lamp switch.

OK or NG

OK

>> Personal lamp switch is OK.

NG

>> GO TO 2.

Terminal

Continuity

Connector

Terminal

Connector

Terminal

R4

130

R6

6 

Yes

131 7 

130

Ground

No

131 

PKIA5140E

3 - Ground

: Continuity should exist.

PKIA5141E

RH and LH personal 
lamp switches in HALF 
or AUTO position

: Continuity should not exist.

RH or LH personal lamp 
switch in FULL position

: Continuity should exist.

PKIA5142E

INTERIOR ROOM LAMP

LT-139

C

D

E

F

G

H

I

J

L

M

A

B

LT

2. 

CHECK WIRE HARNESS CONTINUITY

1.

Disconnect rear interior lamp connector.

2.

Check continuity between BCM harness connector R4 terminal
129 and rear interior lamp harness connector R13 terminal 5.

3.

Check continuity between BCM harness connector R4 terminal
129 and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Repair harness or connector.

3. 

CHECK GROUND CIRCUIT

Check continuity between rear interior lamp harness connector R13
terminal 3 and ground.

OK or NG

OK

>> Replace personal lamp switch.

NG

>> Repair harness or connector.

Door Switch System Check

NKS001A2

1. 

CHECK DOOR SWITCH SIGNAL

With CONSULT-II

●

Operate each door via “DOOR SW” on DATA MONITOR screen
and make sure that switch turns on and off as commanded.

Without CONSULT-II

●

Operate each door and via “switch monitor” of self-diagnosis function and make sure that the switch turns
on and off as commanded.

OK or NG

OK

>> Door switch is OK.

NG

>> GO TO 2.

129 - 5

: Continuity should exist.

129 - Ground

: Continuity should not exist.

PKIA5143E

3 - Ground

: Continuity should exist.

PKIA5144E

SKIA0441E

LT-140

INTERIOR ROOM LAMP

2. 

CHECK DOOR SWITCH HARNESS CONTINUITY

1.

Turn ignition switch OFF.

2.

Disconnect each door switch connector and BCM connector.

3.

Check continuity between each door switch harness connector
and BCM harness connector.

OK or NG

OK

>>

●

Check door switch ground condition.

●

Replace door switch.

NG

>> Repair harness or connector.

PKIB1690E

Terminal

Continuity

BCM 

connector

Terminal Door 

switch 

connector

Terminal 

B4

142

B20

Front door switch 
(driver side)

1 

Yes

143

D82

Door lock assembly 
rear RH (door switch) 

1 

M4

33 D62

Door lock assembly 
rear LH (door switch) 

1 

37

B220

Front door switch 
(passenger side)

1 

PKIB1691E