Courtesy Lamp: Description and Operation

INTERIOR ROOM LAMP

System Description
When the map lamp switch is in the DOOR position, map lamp ON/OFF is controlled by timer according to signals from switches including key switch, door switch driver side and assist side, unlock and lock signal from key fob, door lock and unlock switch, key cylinder lock and unlock switch, ignition switch.

When the map lamp turns ON, there is a gradual brightening over 1 second. When map lamp turns OFF, there is a gradual dimming over 1 second. map lamp timer is controlled by BCM (body control module).

Map lamp timer control settings can be changed with CONSULT-II.

POWER SUPPLY AND GROUND

Power is supplied at all times
- through 10 A fuse [No.21, located in fuse block (J/B)]
- to key switch terminal 2,
- through 10 A fuse [No.18, located in fuse block (J/B)]
- to BCM terminal 42,
- through 40 A fusible link (letter F, located in fuse, fusible link and relay box) l to BCM terminal 55.

When key is removed from ignition key cylinder, power is interrupted
- through key switch terminal 1
- to BCM terminal 37.

With ignition switch in ON or START position, power is supplied
- through 10 A fuse [No.1, located in fuse block (J/B)]
- to BCM terminal 38.

When room lamp and vanity mirror lamp power is supplied at times
- through BCM terminal 41
- to map lamp terminal 3 (Coupe models)
- to map lamp terminal 2 (Roadster models)
- to luggage room lamp terminal 1 (Coupe models)
- to trunk room lamp terminal 1 (Roadster models)
- to vanity mirror lamp LH and RH terminal 1.

Ground is supplied
- to BCM terminal 52
- through grounds M30 and M66.

When driver side door is opened, ground is supplied
- through case ground of driver side door switch
- to BCM terminal 62.

When passenger side door is opened, ground is supplied
- through case ground of passenger side door switch
- to BCM terminal 12.

When back door is opened, ground is supplied (Coupe models)
- through grounds B5, B6, D105 and T14
- to back door switch terminal 3
- from back door switch terminal 1
- to BCM terminal 58.

When trunk hood is opened, ground is supplied (Roadster models)
- through grounds B5, B6 and T14
- to trunk room lamp switch terminal 2
- through trunk room lamp switch terminal 1
- to BCM terminal 57.

When the driver side door or passenger side door is unlocked by door lock and unlock switch, The BCM receives unlock signal with power window serial link
- through grounds M30 and M66
- to power window main switch (door lock and unlock switch) terminal 15 or power window sub switch (door lock and unlock switch) terminal 11
- through power window main switch (door lock and unlock switch) terminal 12 and power window sub switch (door lock and unlock switch) terminal 16
- to BCM terminal 22.

When the driver side door is unlocked by door key cylinder switch, The BCM receives information by communicating with power window main switch
- through grounds M30 and M66
- to door key cylinder switch terminal 2
- through door key cylinder switch terminal 1
- to power window main switch terminal 7
- through power window main switch (door lock and unlock switch) terminal 12
- to BCM terminal 22.

When a signal, or combination of signals is received by BCM, ground is supplied
- through BCM terminal 48
- to map lamp terminal 2 (Coupe models)
- to map lamp terminal 3 (Roadster models).

With power and ground are supplied, map lamp illuminates.

SWITCH OPERATION
When map lamp switch is ON, ground is supplied
- to map lamp terminal 1
- through grounds M30 and M66.

And power is supplied
- through BCM terminal 41
- to map lamp terminal 3 (Coupe models)
- to map lamp terminals 2 (Roadster models).

When vanity mirror lamp LH and RH is ON, ground is supplied
- to vanity mirror lamp LH and RH terminal 2
- through grounds M30 and M66.

And power is supplied
- through BCM terminal 41
- to vanity mirror lamp terminal 1.

MAP LAMP TIMER OPERATION
When the map lamp switch is in the DOOR position, and when all conditions below are met, BCM performs timer control (maximum 30 seconds) for map lamp ON/OFF.

In addition, when map lamp turns ON or OFF there is gradual brightening or dimming over 1 second. Power is supplied at all times
- to 10 A fuse [No. 21 (located in fuse block (J/B)]
- through key switch terminal 2.

When all doors are closed (all door switches OFF) and key is removed from key cylinder (key switch OFF), power will not be supplied to BCM terminal 37.

Ground is supplied
- through BCM terminal 22
- to power window main switch (door lock and unlock switch) terminal 12.

At this time, BCM detects that driver door is unlocked. It determines that map lamp timer operation conditions are met, and turns map lamp ON for 30 seconds.

When all doors are closed (all door switches OFF) and key is in key cylinder (key switch ON), Power is supplied
- through key switch terminal 1
- to BCM terminal 37.

When the key is removed from key switch (key switch OFF), power supply to BCM terminal 37 is terminated. BCM detects that key has been removed. It determines that map lamp timer conditions are met, and turns map lamp ON for 30 seconds.

When driver door opens -> closes, and key is not inserted in key switch (key switch OFF), BCM terminal 62 changes between 0 V (door open) -> 5 V (door closed). BCM determines that conditions for spot lamp operation are met and turns interior lamp ON for 30 seconds.

Timer control is canceled under the following conditions.
- Driver door is locked (When locked key fob or power window main switch (door lock and unlock switch, door key cylinder switch).
- Driver door is opened (driver door switch turns ON).
- Ignition switch ON.

INTERIOR LAMP BATTERY SAVER CONTROL
If the room lamp remains illuminated by door switch open signal, or if room lamp switch is in the ON position for more than 30 minutes after the ignition switch is turned to the OFF position, BCM will automatically turn off map lamp, luggage room lamp (Coupe models), trunk room lamp (Roadster models) and vanity mirror lamp. After lamps turn OFF by battery saver system, the lamps illuminate again when
- signal from key fob, door lock and unlock switch, or key cylinder is locked or unlocked,
- door is opened or closed,
- key is removed from ignition key cylinder or inserted in ignition key cylinder.

Interior lamp battery saver control period can be changed by the function setting of CONSULT-II.