Dodge Dakota 2001, Service Manual

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•
Coolant Temperature Gauge
•
Fuel Gauge
•
Oil Pressure Gauge
•
Speedometer
•
Tachometer
•
Voltage Gauge
The EMIC also includes provisions for the follow-
ing indicators:
•
Airbag Indicator
•
Antilock Brake System (ABS) Indicator
•
Brake Indicator
•
Check Gauges Indicator
•
Coolant Low Indicator (Diesel Engine Only)
•
Cruise Indicator (Odometer VFD)
•
Door Ajar Indicator
•
High Beam Indicator
•
Low Fuel Indicator
•
Malfunction Indicator Lamp (MIL)
•
Overdrive-Off Indicator (Automatic Trans-
mission Only)
•
Seatbelt Indicator
•
Security Indicator
•
Service Four-Wheel Drive Indicator
•
Transmission Overtemp Indicator
•
Turn Signal (Right and Left) Indicators
•
Upshift Indicator
•
Wait-To-Start Indicator (Diesel Engine
Only)
•
Washer Fluid Indicator
•
Water-In-Fuel Indicator (Diesel Engine
Only)
Some of these indicators are either programmable
or automatically configured when the EMIC is con-
nected to the vehicle electrical system. This feature
allows those indicators to be activated or deactivated
for compatibility with certain optional equipment. On
models equipped with an automatic transmission, the
EMIC also incorporates a blue-green digital VFD in
the lower right corner of the cluster for displaying
the transmission gear that has been selected with
the automatic transmission gear selector lever, as
well as the amber overdrive-off indicator display
function.
Cluster illumination is accomplished by adjustable
incandescent back lighting, which illuminates the
gauges for visibility when the exterior lighting is
turned on. The EMIC high beam indicator, turn sig-
nal indicators, and wait-to-start indicator are also
illuminated by dedicated incandescent bulbs. The
remaining indicators in the EMIC are each illumi-
nated by a dedicated Light Emitting Diode (LED)
that is soldered onto the electronic circuit board.
Each of the incandescent bulbs is secured by an inte-
gral 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 cir-
cuits are integral to several wire harnesses, which
are routed throughout the vehicle and retained by
many different methods. These circuits may be con-
nected 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 connectors
and insulators. Refer to the appropriate wiring infor-
mation. The wiring information includes wiring dia-
grams, proper wire and connector repair procedures,
further details on wire harness routing and reten-
tion, 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,
the VFD, the electronic circuit board, the circuit
board hardware, the cluster overlay, or the EMIC
housing are damaged or faulty, the entire EMIC mod-
ule must be replaced. The cluster lens and the hood
and mask unit, the rear cluster housing cover, and
the incandescent lamp bulbs with holders are avail-
able for individual service replacement.
OPERATION
The ElectroMechanical Instrument Cluster (EMIC)
is designed to allow the vehicle operator to monitor
the conditions of many of the vehicle components and
operating systems. The gauges and indicators in the
EMIC provide valuable information about the various
standard and optional powertrains, fuel and emis-
sions systems, cooling systems, lighting systems,
safety systems and many other convenience items.
The EMIC is installed in the instrument panel so
that all of these monitors can be easily viewed by the
vehicle operator when driving, while still allowing
relative ease of access for service. The microproces-
sor-based EMIC hardware and software uses various
inputs to control the gauges and indicators visible on
the face of the cluster. Some of these inputs are hard
wired, but most are in the form of electronic mes-
sages that are transmitted by other electronic mod-
ules
over the Programmable Communications
Interface (PCI) data bus network. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL MOD-
ULES/COMMUNICATION - OPERATION).
The EMIC microprocessor smooths the input data
using algorithms to provide gauge readings that are
accurate, stable and responsive to operating condi-
tions. These algorithms are designed to provide
gauge readings during normal operation that are con-
sistent with customer expectations. However, when
abnormal conditions exist, such as low/high battery
voltage, low oil pressure, or high coolant tempera-
AN
INSTRUMENT CLUSTER 8J - 3
INSTRUMENT CLUSTER (Continued)