Courtesy Lamp: Description and Operation
System DescriptionWhen room lamp switch is in DOOR position, room lamp ON/OFF is controlled by timer according to signals from switches including key switch and key lock solenoid, front door switch LH, unlock signal from keyfob (with remote keyless entry system), door lock/unlock switch, front door lock assembly LH (key cylinder switch), and ignition switch.
When room lamp turns ON, there is a gradual brightening over 1 second. When room lamp turns OFF, there is a gradual dimming over 1 second.
The room lamp timer is controlled by the BCM (body control module).
Room lamp timer control settings can be changed with CONSULT-II.
Ignition keyhole illumination turns ON when driver door is opened (door switch ON) or key is removed from key cylinder. Illumination turns OFF when the ignition switch is turned ON or by room lamp timer.
Step lamp turns ON when driver door, passenger or rear doors are opened (door switch ON). Lamp turns OFF when driver, passenger and rear doors are closed (all door switches OFF).
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 and key lock solenoid terminal 3
- 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 ignition switch, power is supplied
- through the 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. 1, located in the fuse block (J/B)]
- to BCM terminal 38.
Ground is supplied
- to BCM terminal 67
- through grounds F14, M57 and M61.
When the driver side door is opened, ground is supplied
- to BCM terminal 47
- through case ground of front door switch LH.
When the passenger side door is opened, ground is supplied
- to BCM terminal 12
- through case ground of front door switch RH.
When the rear door LH is opened, ground is supplied
- to BCM terminal 48
- through case ground of rear door switch LH.
When the rear door RH is opened, ground is supplied
- to BCM terminal 13
- through case ground of rear door switch RH.
The BCM also receives a ground signal when
- the driver or passenger side door is unlocked with the lock/unlock switch
- the doors are unlocked with keyfob (with remote keyless entry system)
- the driver side door is unlocked with key (key cylinder unlock signal).
When a signal, or combination of signals is received by BCM, ground is supplied
- to interior room lamp terminal 2
- through BCM terminal 63, and
- to trunk room lamp terminal -
- through BCM terminal 49, and
- to step lamp RH and LH terminal -
- through BCM terminal 62, and
- to ignition keyhole illumination lamp terminal +
- through BCM terminal 1.
With power and ground supplied, the lamps illuminate.
SWITCH OPERATION
When driver door switch is ON (door is opened), ground is supplied
- to ignition keyhole illumination terminal +
- through BCM terminal 1.
And power is supplied
- through BCM terminal 56
- to ignition keyhole illumination terminal -.
When any door switch is ON (door is opened), ground is supplied
- to front step lamp LH and RH terminal -
- through BCM terminal 62.
And power is supplied
- through BCM terminal 56
- to step lamp LH and RH terminal +.
When spot lamp switch is ON, ground is supplied
- to spot lamp terminal -
- through grounds F14, M57 and M61.
And power is supplied
- through BCM terminal 56
- to spot lamp terminal +.
When vanity mirror lamp (driver side and passenger side) is ON, ground is supplied
- to vanity mirror lamp (driver side and passenger side) terminal 2
- through grounds F14, M57 and M61.
And power is supplied
- through 10 A fuse [No. 19, located in the fuse block (J/B)]
- to vanity mirror lamp (driver side and passenger side) terminal 1.
When trunk room lamp is ON, ground is supplied
- to trunk room lamp terminal -
- through BCM terminal 49.
And power is supplied
- from BCM terminal 56
- to trunk room lamp terminal +.
ROOM LAMP TIMER OPERATION
When interior room lamp switch is in DOOR position and when all conditions below are met, BCM performs timer control (maximum 30 seconds) for interior room lamp ON/OFF.
Power is supplied
- through 10 A fuse [No. 21, 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.
Ground is supplied
- to BCM terminal 22 (with left and right front power window anti-pinch system) or terminals 7, 8, 45 and 46 (with left front only power window anti-pinch system)
- through main power window and door lock/unlock switch, power window and door lock/unlock switch RH and front door lock assembly (key cylinder switch).
At the time that driver or passenger door is opened, BCM detects that door is unlocked. It determines that interior room lamp timer operation conditions are met and turns the interior room lamp ON for 30 seconds.
When 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 (key switch OFF), power supply to BCM terminal 37 is terminated. BCM detects that key has been removed, determines that interior room lamp timer conditions are met and turns the interior room 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 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.
- Driver door is locked [when locked with keyfob, main power window and door lock/unlock switch, or front door lock assembly (key cylinder switch)]
- Driver door is opened (driver door switch turns ON)
- Ignition switch ON.
INTERIOR LAMP BATTERY SAVER CONTROL
If interior lamp is left ON, it will not be turned out 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:
- Step lamp
- Spot lamp
- Trunk room lamp
- Interior room lamp
- Ignition keyhole illumination lamp
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 (key cylinder switch) is locked or unlocked
- door is opened or closed
- key is removed from or inserted in ignition key cylinder.
Interior lamp battery saver control period can be changed by the function setting of CONSULT-II.