zero. The interior lighting remains illuminated until the ignition switch is turned to the Off position, at which time
the interior lighting returns to normal operation and control. These Enhanced Accident Response System
(EARS) features are each dependent upon a functional vehicle electrical system following the vehicle impact
event.
•
Exterior Lighting Control - The EMIC provides electronic head lamp and/or park lamp request messages to
the Front Control Module (FCM) located on the Integrated Power Module (IPM) for the appropriate exterior
lamp control of standard head and park lamps, as well as optional front fog lamps. This includes support for
headlamp beam selection and the optical horn feature, also known as flash-to-pass.
•
Exterior Lighting Fail-safe - In the absence of a headlamp switch input, the EMIC will turn on the cluster
illumination lamp and provide electronic headlamp low beam and park lamp request messages to the Front
Control Module (FCM) located on the Integrated Power Module (IPM) for default exterior lamp operation. The
FCM will also provide default park lamp and headlamp low beam operation and the EMIC will turn on the
cluster general illumination lighting at full intensity if there is a failure of the electronic data bus communication
between the EMIC and the FCM.
•
Fuel Level Data Support - The EMIC provides a current source for and receives a hard wired analog input
from the fuel level sending unit located on the fuel pump module in the fuel tank. The EMIC uses this input to
calculate the proper fuel gauge needle position and low fuel indicator operation. Based upon this input, the
EMIC also calculates fuel level, average fuel economy and distance to empty data, then uses electronic mes-
saging to transmit this data over the CAN data bus for use by other electronic modules in the vehicle.
•
Heated Seat Control - The EMIC monitors inputs from the ignition switch and electronic engine speed mes-
sages from the Powertrain Control Module (PCM) to control a high side driver output to the heated seat switch
Light Emitting Diode (LED) indicators. This input allows the heated seat switches to wake up the heated seat
module if the switch is actuated. The EMIC will de-energize the heated seat switch LED indicators, which
deactivates the heated seat system, if the ignition switch is turned to any position except On or Start, or if the
engine speed message indicates zero. (Refer to 8 - ELECTRICAL/HEATED SEATS - DESCRIPTION).
•
Horn Control - The EMIC monitors an input from the horn switch and provides electronic horn request mes-
sages to the Front Control Module (FCM) located on the Integrated Power Module (IPM) for horn relay control.
•
Interior Lamp Load Shedding - The EMIC provides a battery saver feature which will automatically turn off all
interior lamps if they remain on after a timed interval of about five minutes.
•
Interior Lighting Control - The EMIC monitors inputs from the interior lighting switch, the door ajar switches,
the reading lamp switches, and the Sentry Key Remote Entry Module (SKREEM) to provide courtesy lamp
control. This includes support for timed illuminated entry with theater-style fade-to-off and courtesy illumination
defeat features.
•
Panel Lamps Dimming Control - The EMIC monitors hard wired multiplexed inputs from the headlamp switch
on the instrument panel, then provides a hard wired 12-volt Pulse-Width Modulated (PWM) output that syn-
chronizes the dimming level of all panel lamps dimmer controlled lamps with that of the cluster illumination
lighting.
•
Power Locks - The EMIC monitors inputs from the power lock switches and the Sentry Key REmote Entry
Module (SKREEM) to provide control of the power lock motors through high side driver outputs to the motors.
This includes support for rolling door locks (also known as automatic door locks), automatic door unlock, brief-
case lock mode, and a door lock inhibit mode. (Refer to 8 - ELECTRICAL/POWER LOCKS - DESCRIPTION).
•
Remote Keyless Entry - The EMIC supports the standard Remote Keyless Entry (RKE) system features,
including support for the RKE Lock, Unlock (with optional driver-door-only unlock, and unlock-all-doors), Panic,
audible chirp, optical chirp, illuminated entry modes, an RKE programming mode, as well as optional Vehicle
Theft Security System (VTSS) arming (when the proper VTSS arming conditions are met) and disarming.
•
Remote Radio Switch Interface - The EMIC monitors inputs from the optional remote radio switches and then
provides the appropriate electronic data bus messages to the radio to select the radio or optional hands-free
cellular system operating mode, volume control, preset station scan and station seek features.
•
Turn Signal & Hazard Warning Lamp Control - The EMIC monitors hard wired multiplexed inputs from the
multi-function switch on the steering column, then provides electronic turn and hazard lamp request messages
to the Front Control Module (FCM) located on the Integrated Power Module (IPM) for turn and hazard lamp
control. The EMIC also provides an audible click at one of two rates to emulate normal and bulb out turn or
hazard flasher operation based upon electronic lamp outage messages from the FCM, and provides an audible
turn signal on chime warning if a turn is signalled continuously for more than about 1.6 kilometers (one mile)
and the vehicle speed remains greater than about twenty-four kilometers-per-hour (fifteen miles-per-hour).
•
Vacuum Fluorescent Display Synchronization - The EMIC monitors hard wired multiplexed inputs from the
headlamp switch on the instrument panel, then transmits electronic panel lamp dimming level messages which
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