Dodge Ram Truck 1500-2500-3500. Manual — part 385

rior lighting returns to normal operation and control. These Enhanced Accident Response System (EARS) fea-
tures 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 lamps 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 illumination lamps at full intensity if there is a failure of the electronic data bus communication between
the EMIC and the FCM.

•

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.
The EMIC also controls horn relay operation in this manner to provide the horn features of the optional
Remote Keyless Entry (RKE) or Vehicle Theft Security System (VTSS).

•

Interior Lamp Load Shedding - The EMIC provides a battery saver feature which will automatically turn off all
interior lamps and the cargo 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 cargo lamp switch, the reading lamp switches, and the Remote Keyless Entry (RKE) module to provide
courtesy lamp control. This includes support for timed illuminated entry with theater-style fade-to-off and cour-
tesy illumination defeat features.

•

Lamp Out Indicator Control - The EMIC monitors electronic lamp outage messages from the Front Control
Module (FCM) located on the Integrated Power Module (IPM) in order to provide lamp out indicator control for
the headlamps (low and high beams), turn signal lamps, and the brake lamps (excluding CHMSL).

•

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
lamps.

•

Power Locks - The EMIC monitors inputs from the power lock switches and the Remote Keyless Entry (RKE)
module (optional) 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, a
door lock inhibit mode, and central locking (with the optional Vehicle Theft Security System only). (Refer to 8
- ELECTRICAL/POWER LOCKS - DESCRIPTION).

•

Remote Keyless Entry - The EMIC supports the optional 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 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
allows all other electronic modules on the PCI data bus with Vacuum Fluorescent Display (VFD) units to coor-

8J - 100

INSTRUMENT CLUSTER -SERVICE INFORMATION

DR/DH

dinate their illumination intensity with that of the EMIC VFD units. This includes a parade mode (also known as
funeral mode) that allows all VFD units in the vehicle to be illuminated at full (daytime) intensity while driving
during daylight hours with the exterior lamps turned On.

•

Vehicle Theft Security System - The EMIC monitors inputs from the door cylinder lock switch, the door ajar
switches, the ignition switch, and the Remote Keyless Entry (RKE) module, then provides electronic horn and
lighting request messages to the Front Control Module (FCM) located on the Integrated Power Module (IPM)
for the appropriate VTSS alarm output features.

•

Wiper/Washer System Control - The EMIC monitors both hard wired multiplexed inputs from the front wiper
and washer switches in the multi-function switch on the steering column, then provides electronic wiper and/or
washer request messages to the Front Control Module (FCM) located on the Integrated Power Module (IPM)
for the appropriate wiper and washer system features. (Refer to 8 - ELECTRICAL/WIPERS/WASHERS -
DESCRIPTION).

Gasoline Engine except SRT-10

DR/DH

INSTRUMENT CLUSTER -SERVICE INFORMATION

8J - 101

The EMIC houses six analog gauges and has provisions for up to twenty-three indicators. Some of the EMIC indi-
cators are automatically configured when the EMIC is connected to the vehicle electrical system for compatibility
with certain optional equipment or equipment required for regulatory purposes in certain markets. While each EMIC
may have provisions for indicators to support every available option, the configurable indicators will not be functional
in a vehicle that does not have the equipment that an indicator supports.

The EMIC includes the following analog gauges:

•

Coolant Temperature Gauge (13 - SRT-10 or 14 - except SRT-10)

•

Fuel Gauge (21 - SRT-10 or 22 - except SRT-10)

•

Oil Pressure Gauge (10)

•

Speedometer (8)

Diesel Engine

SRT-10

8J - 102

INSTRUMENT CLUSTER -SERVICE INFORMATION

DR/DH

•

Tachometer (4)

•

Voltage Gauge (2)

The EMIC includes the following VFD units:

•

Gear Selector Indicator (15 - SRT-10 or 16 - except SRT-10)

•

Odometer/Trip Odometer (19 - SRT-10 or 20 - except SRT-10)

The EMIC includes provisions for the following indicators:

•

Airbag Indicator (with Airbag System only) (5)

•

Antilock Brake System (ABS) Indicator (with ABS or Rear Wheel Anti-Lock [RWAL] brakes only) (13 -
Diesel, 18 - SRT-10 or 19 - Gas except SRT-10)

•

Brake Indicator (17 - SRT-10 or 18 - except SRT-10)

•

Cargo Lamp Indicator (11)

•

Check Gauges Indicator (16 - SRT-10, 17 - Gas except SRT-10 or 25 - Diesel)

•

Cruise Indicator (in Gear Selector Indicator VFD)

•

Door Ajar Indicator (12)

•

Electronic Throttle Control (ETC) Indicator (13 - 5.7L Gasoline Engine only)

•

High Beam Indicator (6)

•

Lamp Out Indicator (in Odometer/Trip Odometer VFD)

•

Low Fuel Indicator (22 - SRT-10 or 23 - except SRT-10)

•

Malfunction Indicator Lamp (MIL) (1)

•

Seatbelt Indicator (7)

•

Security Indicator (with Sentry Key Immobilizer & Vehicle Theft Security Systems only) (14 - SRT-10 or
15 - except SRT-10)

•

Service Four-Wheel Drive Indicator (with Four-Wheel Drive only) (in Odometer/Trip Odometer VFD)

•

Tow/Haul Indicator (with Automatic Transmission only) (in Odometer/Trip Odometer VFD)

•

Transmission Overtemp Indicator (with Automatic Transmission only) (23 - SRT-10 or 24 - except SRT-
10)

•

Turn Signal (Right and Left) Indicators (3 & 9)

•

Upshift Indicator (with Manual Transmission only in certain markets where required) (in Gear Selector
Indicator VFD)

•

Washer Fluid Indicator (in Odometer/Trip Odometer VFD)

•

Wait-To-Start Indicator (19 - with Diesel only)

•

Water-In-Fuel Indicator (17 - with Diesel only)

Each indicator in the EMIC, except those located within one of the VFD units, is illuminated by a dedicated LED that
is soldered onto the EMIC electronic circuit board. The LED units are not available for service replacement and, if
damaged or faulty, the entire EMIC must be replaced. Cluster illumination is accomplished by dimmable incandes-
cent back lighting, which illuminates the gauges for visibility when the exterior lighting is turned on. Each of the
incandescent bulbs is secured by an integral bulb holder to the electronic circuit board from the back of the cluster
housing.

Hard wired circuitry connects the EMIC to the electrical system of the vehicle. These hard wired circuits are integral
to several wire harnesses, which are routed throughout the vehicle and retained by many different methods. These
circuits may be connected to each other, to the vehicle electrical system and to the EMIC through the use of a
combination of soldered splices, splice block connectors, and many different types of wire harness terminal con-
nectors and insulators. Refer to the appropriate wiring information. The wiring information includes wiring diagrams,
proper wire and connector repair procedures, further details on wire harness routing and retention, as well as pin-
out and location views for the various wire harness connectors, splices and grounds.

The EMIC modules for this model are serviced only as complete units. The EMIC module cannot be adjusted or
repaired. If a gauge, an LED indicator, a VFD unit, the electronic circuit board, the circuit board hardware, the clus-
ter overlay, or the EMIC housing are damaged or faulty, the entire EMIC module must be replaced. The cluster lens,
hood and mask unit and the individual incandescent lamp bulbs with holders are available for separate service
replacement.

DR/DH

INSTRUMENT CLUSTER -SERVICE INFORMATION

8J - 103