Interior Lighting Control

The EMIC contains an integral timer and logic circuit to perform both timer and control functions for the interior courtesy lamps. The EMIC uses hard wired inputs from the ignition switch, both door ajar switches on separate driver and passenger door ajar switch sense circuits, from the resistor multiplexed panel lamps dimmer circuitry of the multifunction switch on the panel lamps dimmer signal circuit and its control logic to provide a battery current output to the courtesy lamps on a courtesy lamp feed circuit. The EMIC control provides a theater-type fade-to-off feature that will slowly dim the courtesy lamps about 5 seconds after both doors are closed. The EMIC also provides an illuminated entry/exit feature by monitoring the door ajar and ignition switch inputs. When a door is opened with the ignition switch in the OFF position, the EMIC turns on the courtesy lamps. When the ignition switch is turned to the ON or START positions, the EMIC turns the courtesy lamps OFF immediately with no theater dimming. When the ignition switch is turned from the ON position to the OFF position, the EMIC turns on the interior lights for about 10 seconds or until the ignition switch is again turned to the ON or START positions. The EMIC also provides a battery saver feature for the interior lighting. Unless the engine is running, the instrument panel will automatically turn off the interior lights if they are left on for more than 20 minutes, regardless of the status of the ignition switch, door ajar switch or multifunction switch inputs to the cluster. If the interior lighting system test OK, but the system fails to operate, the EMIC must be replaced.