Mitsubishi 3000GT - Page 574

54-78
CHASSIS ELECTRICAL - Lighting System
OPERATION
<Dome light>
l Battery voltage is always applied to the dome light. When the dome light switch is turned to “ON”,
the dome light will remain lit. After either door is opened if the dome light switch is at “DOOR” position,
the dome light will come on.
l With the dome light turned on (with the ignition switch in the OFF position and with the dome light
switch in the DOOR position), close all doors, and the timer circuit in the ETACS unit will be activated
to gradually vary the voltage for approx. 6 seconds owing to the duty control, and the voltage will
be output to transistor Tr. Since the voltage applied to the dome light gradually decreases, the dome
light will be dimmed.
l If the ignition switch is turned to “ON” while the dome light is lit (while the timer is activated), the
timer circuit will be opened to turn “OFF” transistor Tr. This will immediately turn off the dome light
without dimming.
<Foot lights and ignition key illumination light>
-
l Battery voltage is always applied to the foot lights and ignition key illumination light.
With the ignition switch in the OFF position, open any door, and all lights will come on.
l With all lights turned on (with the ignition switch in the OFF position), close all doors, and the timer
circuit inside the ETACS unit will operate in the same manner as the dome light to dim all lights.
When the ignition switch is placed in the ON position with all lights turned on (with the timer in operation),
the same operation as the dome light will take place.
TROUBLESHOOTING HINTS
Phenomenon
Dome light does not come on
when a door is opened with the
dome light switch in the DOOR
position.
Check the door switch input signal.
Check the door switch. (Refer to GROUP 42 -
The foot lights and ignition
l
key cylinder illumination
Check the dome light switch.
light illuminate.
l
Check the dome light bulb.
Dome light, foot lights and ignition key illumination light go out
l
at once when doors are closed.
Check the door switch input signal.
(Refer to P.54-80.)
Even if ignition switch is turned on while lights are being
l
dimmed,
lights do not out at the same time.
Check the ignition switch input signal.
go
(Refer to
P.54-80.)
COMPONENT LOCATION
Data ‘link connect&
TSB Revision