Infiniti FX35, FX50 (S51). Manual - part 1203

INL-12

< SYSTEM DESCRIPTION >

INTERIOR ROOM LAMP BATTERY SAVER SYSTEM

INTERIOR ROOM LAMP BATTERY SAVER SYSTEM

System Diagram

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System Description

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OUTLINE

• Interior room lamp battery saver is controlled by battery saver function of BCM.
• BCM cuts the interior room lamp power supply depending on the vehicle condition. Total illumination control

unit cuts the hospitality lighting power supply according to interior room lamp power supply (battery saver
signal). This function prevents the battery from over-discharging if the driver neglects turning OFF the lamps.

Applicable lamps

Control by the total illumination control unit

• Push-button ignition switch illumination
• Map lamp and personal lamps
• Center console indirect illumination
• Vanity mirror lamps
• Puddle lamps
• Foot lamps
• Mood lamps (Door armrest)
• Each illumination (Clock, switches, etc.)

Control by BCM

• Step lamps
• Luggage room lamps

INTERIOR ROOM LAMP BATTERY SAVER FUNCTION

• When the ignition switch is turned OFF, BCM operates the timer for a period of time to cut the interior room

lamp power supply.

• When interior room lamp power supply (battery saver signal) is OFF, the total illumination control unit cuts

hospitality lighting power supply. And then it switches to sleep mode.

• BCM restarts the timer when any of the following signals changes while operating the timer.
- Ignition switch status
- Door switch signal (ALL)
- Door lock/unlock signal (Remote keyless entry receiver, each request switch, key cylinder lock/unlock

switch, door lock/unlock switch)

- Back door switch signal
- Key switch signal (Key slot)
• BCM provides the interior room lamp power supply continuously when the ignition switch is in an other than

OFF.

NOTE:

JPLIA1207GB

INTERIOR ROOM LAMP BATTERY SAVER SYSTEM

INL-13

< SYSTEM DESCRIPTION >

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Each function of interior room lamp battery saver can be set by CONSULT-III. Refer to 

INL-24, "BATTERY

SAVER : CONSULT-III Function (BCM - BATTERY SAVER)"

.

Component Parts Location

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1.

Puddle lamp

2.

• Request switch
• Key cylinder lock/unlock 

switch

3.

Door switch

4.

Luggage room lamp (Back door 
side)

5.

Luggage room lamp (Lug-
gage side)

6.

Map lamp

7.

Vanity mirror lamp

8.

Mood lamp

9.

Personal lamp

10. Step lamp

11. Door lock/unlock switch

12. Key slot

13. Illuminations

14. Foot lamp

15. Center console indirect illumination

16. Map lamp main switch

17. Push-button ignition switch il-

lumination

18. Back door switch

19. BCM

20. Remote keyless entry receiv-

er

21. Total illumination control unit

JPLIA1249ZZ

INL-14

< SYSTEM DESCRIPTION >

INTERIOR ROOM LAMP BATTERY SAVER SYSTEM

Component Description

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A.

Back door lock assembly

B.

Dash side lower (passenger 
side)

C.

Over the glove box

D.

Instrument lower cover LH

Part

Description

Total illumination control unit

Cuts the hospitality lighting power supply according to interior room lamp power supply 
(battery saver signal).

BCM

Operates the interior room lamp battery saver depending on the vehicle condition to 
cut the interior room lamp power supply (battery saver signal). 

Remote keyless entry receiver

• Receives the lock/unlock signal from keyfob.
• Transmits the lock/unlock signal to BCM.

• Request switch
• Key cylinder lock/unlock switch
• Door lock/unlock switch

Inputs the lock/unlock signal to BCM.

• Door switch
• Back door switch

Inputs a switch signal to BCM.

Key slot

Inputs the key switch status to BCM.

ILLUMINATION CONTROL SYSTEM

INL-15

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ILLUMINATION CONTROL SYSTEM

System Diagram

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System Description

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OUTLINE

Each illumination lamp is controlled by each function of BCM, IPDM E/R, total illumination control unit and
combination meter.

Control by BCM

• Combination switch reading function
• Headlamp control function

Control by IPDM E/R

• Relay control function

Control by combination meter

• Meter illumination control function (Refer to 

MWI-27, "METER ILLUMINATION CONTROL : System Dia-

gram"

.)

Control by the total illumination control unit

• Interior room lamp control function (Refer to 

INL-6, "System Diagram"

.)

ILLUMINATION CONTROL

• BCM detects the combination switch condition by the combination switch reading function.
• BCM transmits position light request signal to IPDM E/R and combination meter (through the unified meter

and A/C amp.) according to tail lamp ON condition.

Tail lamp ON condition

- Lighting switch 1ST
- Lighting switch 2ND
- Lighting switch AUTO, and the auto light function ON judgment (With auto light system)
• IPDM E/R turns the integrated tail lamp relay ON according to position light request signal. It provides the

power supply to each illumination lamp. 

• Total illumination control unit turns each illumination (linked with hospitality lighting system) ON according to

tail lamp signal from IPDM E/R.

• Combination meter enters in the nighttime mode according to position light request signal (through the uni-

fied meter and A/C amp.). Under the nighttime mode the combination meter controls each illumination
brightness.

• Total illumination control unit controls each illumination (linked with hospitality lighting system) brightness

according to the illumination control signal from combination meter.

JPLIA1208GB