Courtesy Lamp: Description and Operation

INTERIOR ROOM LAMP

Interior Room Lamp Schematic (Part 1):

Interior Room Lamp Schematic (Part 2):

INTERIOR ROOM LAMP Schematic

System Description
When room lamp and personal lamp switch is in DOOR position, room lamp and personal lamp ON/OFF is controlled by timer according to signals from switches including key switch and key lock solenoid, front door switch LH side, unlock signal from keyfob, door lock and unlock switch, key cylinder lock and unlock switch, ignition switch, and glass hatch ajar switch.

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

Room lamp and personal lamp timer control settings can be changed with CONSULT-II.
Ignition keyhole illumination turns ON when front door LH is opened (door switch ON) or key is removed from key cylinder. Illumination turns OFF when front door LH is closed (door switch OFF).

STEP and foot lamps turn ON when front or rear doors are opened (door switch ON). Lamps turn OFF when front and rear doors are closed (all door switches OFF).

POWER SUPPLY AND GROUND
Power is supplied at all times
- through 10 A fuse [No. 19, located in the fuse block (J/B)]
- to key switch and key lock solenoid terminal 3,
- through 15 A fuse [No. 22, located in the fuse block (J/B)]
- to BCM terminal 57, and
- through 50 A fusible link (letter f, located in the fuse and fusible link box)
- to BCM terminal 70.

When the key is inserted in key switch and key lock solenoid, power is supplied
- through key switch and key lock solenoid terminal 4
- to BCM terminal 37.

With the ignition switch in the ON or START position, power is supplied
- through 10 A fuse (No. 59, located in the fuse and relay box)
- to BCM terminal 38.

Ground is supplied
- to BCM terminal 67
- through grounds M57, M61 and M79.

When the front door LH is opened, ground is supplied
- to BCM terminal 47
- through front door switch LH terminal 2
- through case ground of front door switch LH.

When the front door RH is opened, ground is supplied
- to BCM terminal 12
- through front door switch RH terminal 2
- through case ground of front door switch RH.

When the rear door LH is opened, ground is supplied
- to BCM terminal 48
- through rear door switch LH terminal 2
- through case ground of rear door switch LH.

When the rear door RH is opened, ground is supplied
- to BCM terminal 13
- through rear door switch RH terminal 2
- through case ground of rear door switch RH.

When the liftgate is opened, ground is supplied
- to BCM terminal 43
- through back door switch terminal 3 (without power back door)
- through back door switch terminal 1 (without power back door), or
- through back door latch (door ajar switch) terminal 7 (with power back door)
- through back door latch (door ajar switch) terminal 8 (with power back door)
- through grounds B7 and B19.

When the glass hatch is opened, ground is supplied
- to BCM terminal 42
- through glass hatch ajar switch terminal 1
- through case ground of glass hatch ajar switch.

When the front door LH or RH is unlocked by the door lock and unlock switch, BCM receives serial data
- to BCM terminal 22
- through main power window and door lock/unlock switch terminal 14 or power window and door lock/unlock switch RH terminal 16.

The main power window and door lock/unlock switch receives a ground signal
- to main power window and door lock/unlock switch terminal 17
- through grounds M57, M61 and M79.

The power window and door lock/unlock switch RH receives a ground signal
- to front power window and door lock/unlock switch terminal 11
- through grounds M57, M61 and M79.

When the front door LH is unlocked by the key, the BCM receives serial data
- to BCM terminal 22
- through main power window and door lock/unlock switch terminal 14.

And the main power window and door lock/unlock switch receives a ground signal
- to main power window and door lock/unlock switch terminal 6
- through front door lock assembly LH (key cylinder switch) terminal 6
- through front door lock assembly LH (key cylinder switch) terminal 5
- through grounds M57, M61 and M79.

When a signal, or combination of signals is received by BCM, ground is supplied
- to door mirror LH and RH terminal 13 (with puddle lamps)
- to front room/map lamp assembly terminal 1 and
- through front room/map lamp assembly terminal 2
- to personal lamps terminal 1
- through BCM terminal 63, and
- to cargo lamp terminal 1 (when cargo lamp switch is in DOOR position)
- through BCM terminal 49.

With power and ground supplied, the lamps illuminate.

SWITCH OPERATION
When any door switch is ON (door is opened), ground is supplied
- to front and rear step lamps LH and RH terminal 2
- to foot lamp LH and RH terminal 2 (with foot lamps)
- through BCM terminal 62, and
- to ignition keyhole illumination terminal 2
- through BCM terminal 1.

And power is supplied
- through BCM terminal 56
- to ignition keyhole illumination terminal 1
- to front and rear step lamps LH and RH terminal 1
- to door mirror LH and RH terminal 12 (with puddle lamps)
- to foot lamp LH and RH terminal 1 (with foot lamps)
- to front room/map lamp assembly terminal 6
- to vanity lamp LH and RH terminal 1
- to personal lamp 2nd row and 3rd row terminal 3, and
- to cargo lamp terminal 2.

When map lamp switch is ON, ground is supplied
- to front room/map lamp assembly terminal 5
- through grounds M57, M61 and M79.

When vanity lamp (LH or RH) is ON, ground is supplied
- to vanity lamp (LH or RH) terminal 2
- through grounds M57, M61 and M79.

When cargo lamp is ON, ground is supplied through cargo lamp case ground.

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

Power is supplied
- through 10 A fuse [No. 19, located in the fuse block (J/B)]
- to key switch and key lock solenoid terminal 3.

Key is removed from ignition key cylinder (key switch OFF), power will not be supplied to BCM terminal 37. Serial data is supplied
- to BCM terminal 22
- through main power window and door lock/unlock switch terminal 14.

At the time that front door LH is opened, BCM detects that front door LH is unlocked. It determines that interior room lamp and map lamp timer operation conditions are met, and turns the interior room lamps ON for 30 seconds.

Key is in ignition key cylinder (key switch ON), power is supplied
- through key switch and key lock solenoid terminal 4
- to BCM terminal 37.

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

When front door LH opens -> closes, and the key is not inserted in the key switch and key lock solenoid (key switch OFF), BCM terminal 47 changes between 0 V (door open) -> 12 V (door closed). The BCM determines that conditions for interior room lamp operation are met and turns the interior room lamp ON for 30 seconds. Timer control is canceled under the following conditions.
- Front door LH is locked [when locked by keyfob, main power window and door lock/unlock switch, or front door lock assembly LH (key cylinder switch)]
- Front door LH is opened (front door switch LH turns ON)
- Ignition switch ON.

INTERIOR LAMP BATTERY SAVER CONTROL
If interior lamp is left ON, it will not be turned off even when door is closed.
BCM turns off interior lamp automatically to save battery 30 minutes after ignition switch is turned off.

BCM controls interior lamps listed below:
- Vanity lamp
- Front room/map lamp
- Cargo lamp
- Personal lamps
- Step lamps
- Puddle lamps (with puddle lamps)
- Foot lamps (with foot lamps)
- Ignition keyhole illumination

After lamps turn OFF by the battery saver system, the lamps illuminate again when
- signal received from keyfob, or main power window and door lock/unlock switch or front door lock assembly LH (key cylinder switch) is locked or unlocked
- door is opened or closed
- key is removed from ignition key cylinder (key switch OFF) or inserted in ignition key cylinder (key switch ON).

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