Dodge Dakota 2001, Service Manual

Page: 418 / 2307

tion will toggle the VFD between the odometer and
trip odometer modes. The word “TRIP” will also
appear in blue-green text when the VFD trip odome-
ter mode is active. Depressing the switch button for
about two seconds while the VFD is in the trip odom-
eter mode will reset the trip odometer value to zero.
Holding this switch depressed while turning the igni-
tion switch from the Off position to the On position
will activate the EMIC self-diagnostic actuator test.
The EMIC will automatically flash the odometer or
trip odometer information on and off if there is a loss
of PCI data bus communication. The VFD will also
display various information used in several diagnos-
tic procedures. Refer to the appropriate diagnostic
information for additional details on this VFD func-
tion.
Models equipped with an automatic transmission
have a second VFD soldered to the EMIC circuit
board, which serves as the electronic transmission
gear selector indicator. Like the odometer/trip odom-
eter VFD, this display is active with the ignition
switch in the On or Start positions, and inactive
when the ignition switch is in any other position.
This VFD also has an amber “O/D OFF” indicator
that illuminates when the automatic transmission
electronic overdrive is turned off by depressing the
overdrive-off switch button located in the knob on the
end of the gear selector lever on the right side of the
steering column. This VFD displays the characters
“P,” “R,” “N,” “D,” “2,”and “1,” which represent each of
the available gear selector positions. A small rectan-
gular box is illuminated around the character repre-
senting the gear position that is currently selected.
Both VFDs are diagnosed using the EMIC self-di-
agnostic actuator test. (Refer to 8 - ELECTRICAL/
INSTRUMENT
CLUSTER - DIAGNOSIS AND
TESTING). Proper testing of the PCI data bus and
the data bus message inputs to the EMIC that con-
trol some of the VFD functions requires the use of a
DRBIII
t
scan tool. Refer to the appropriate diagnos-
tic information. Specific operation details for the
odometer, trip odometer, gear selector indicator,
cruise indicator, and overdrive-off indicator functions
of these VFDs may be found elsewhere in this service
manual.
INDICATORS
Indicators are located in various positions within
the EMIC and are all connected to the EMIC circuit
board. The high beam indicator, washer fluid indica-
tor, turn signal indicators, and the diesel engine
wait-to-start indicator are hard wired. The brake
indicator is controlled by PCI data bus messages
from the Controller Anti-lock Brake (CAB) and the
hard wired park brake switch input to the EMIC.
The seatbelt indicator is controlled by the EMIC pro-
gramming, PCI data bus messages from the Airbag
Control Module (ACM), and the hard wired seat belt
switch input to the EMIC. The security indicator is
controlled by a hard wired Central Timer Module
(CTM) input to the EMIC, and by PCI data bus mes-
sages from the Sentry Key Immobilizer Module
(SKIM) if the vehicle is equipped with the optional
Sentry Key Immobilizer System (SKIS). The Mal-
function Indicator Lamp (MIL) is normally controlled
by PCI data bus messages from the Powertrain Con-
trol Module (PCM); however, if the EMIC loses PCI
data bus communications, the EMIC circuitry will
automatically turn the MIL on, and flash the odom-
eter VFD on and off repeatedly until PCI data bus
communication is restored. The EMIC uses PCI data
bus messages from the CTM, the PCM, the Transfer
Case Control Module (TCCM), the ACM, and the
CAB to control all of the remaining indicators. Differ-
ent indicators are controlled by different strategies;
some receive fused ignition switch output from the
EMIC circuitry cluster and have a switched ground,
while others are grounded through the EMIC cir-
cuitry and have a switched battery feed.
In addition, certain indicators in this instrument
cluster are programmable or configurable. This fea-
ture allows the programmable indicators to be acti-
vated or deactivated with a DRBIII
t
scan tool, while
the configurable indicators will be automatically
enabled or disabled by the EMIC circuitry for com-
patibility with certain optional equipment. The only
programmable indicator for this model is the upshift
indicator. The cruise indicator, service 4WD indicator,
gear selector indicator, overdrive-off indicator, and
the transmission overtemp indicator are automati-
cally configured, either electronically or mechanically.
If the EMIC is disconnected from the fused B(+) cir-
cuit for more than about five minutes the EMIC will
forget its previous electronic configuration settings,
but will learn the proper indicator configuration set-
tings again when it is reinstalled in a vehicle.
The hard wired indicators are diagnosed using con-
ventional diagnostic methods. The EMIC and PCI
bus message controlled indicator lamps are diagnosed
using the EMIC self-diagnostic actuator test. (Refer
to 8 - ELECTRICAL/INSTRUMENT CLUSTER -
DIAGNOSIS AND TESTING). Proper testing of the
PCI data bus and the data bus message inputs to the
EMIC that control each indicator require the use of a
DRBIII
t
scan tool. Refer to the appropriate diagnos-
tic information. Specific operation details for each
indicator may be found elsewhere in this service
manual.
CLUSTER ILLUMINATION
The EMIC has several illumination lamps that are
illuminated when the exterior lighting is turned on
AN
INSTRUMENT CLUSTER 8J - 5
INSTRUMENT CLUSTER (Continued)