Courtesy Lamp: Description and Operation
System DescriptionWhen map lamp switch is in 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 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.
The map lamp timer is controlled by the 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 the fuse block (J/B)]
- to key switch terminal 2.
- through 40 A fusible link [letter F, located in the fuse and fusible link box]
- to BCM (body control module) terminal 7.
When the key is removed from ignition key cylinder, power is interrupted
- through key switch terminal 1
- to BCM (body control module) terminal 62.
With the ignition switch in the ON or START position, power is supplied
- through 10 A fuse [No.1, located in the fuse block (J/B)]
- to BCM (body control module) terminal 35.
When room lamp and vanity mirror lamp power is supplied at times.
- through BCM (body control module) terminal 24
- to map lamp terminal 3 and (Coupe models)
- to map lamp terminal 2 and (Roadster models)
- to vanity mirror lamp LH and RH terminal 1.
Ground is supplied:
- to BCM (body control module) terminal 8
- through grounds E17,E43 and F152.
When the driver side door is opened, ground is supplied
- through case ground of driver side door switch
- to BCM (body control module) terminal 14.
When the passenger side door is opened, ground is supplied
- through case ground of passenger side door switch
- to BCM (body control module) terminal 10.
When the 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 (body control module) terminal 18.
When the driver side door or passenger side is unlocked by the door lock and unlock switch, BCM (body control module) 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
- from 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 (body control module) terminal 74
When the driver side door is unlocked by the door key cylinder switch, BCM (body control module) receives information by communicating with power window main switch:
- through grounds M30 and M66
- to door key cylinder switch terminal 2
- from door key cylinder switch terminal 1
- to power window main switch terminal 7
- from power window main switch (door lock and unlock switch) terminal 12
- to BCM (body control module) terminal 74.
When a signal, or combination of signals is received by BCM (body control module), ground is supplied
- through BCM (body control module) terminal 32
- to map lamp terminal 2 (Coupe models)
- to map lamp terminal 3 (Roadster models).
With power and ground are supplied, the 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
- from BCM terminal 24
- 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 terminal 2.
- through grounds M30 and M66
And power is supplied:
- from BCM terminal 24
- to vanity mirror lamp terminal 1.
MAP LAMP TIMER OPERATION
When map lamp switch is in 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
- to 10 A fuse [No. 21 (located in the 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 62.
Ground is supplied
- from BCM terminal 74
- 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 the 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 62.
When key is removed from key switch (key switch OFF), power supply to BCM terminal 62 is terminated. BCM detects that key has been removed. It determines that map lamp timer conditions are met, and turns the map lamp ON for 30 seconds.
When driver door opens -> closes, and the key is not inserted in the key switch (key switch OFF), BCM terminal 14 changes between 0 V (door open) -> 5 V (door closed). The BCM determines that conditions for spot lamp operation are met and turns the 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 the door switch open signal, or if the room lamp switch is in the ON position for more than 30 minutes after the ignition switch is turned to the OFF position, the BCM will automatically turn off the map lamp, step lamp, and/or personal lamp and vanity mirror lamp.
After lamps turn OFF by the battery saver system, the lamps illuminate again when:
- signal from key fob, or 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.