2001 DODGE RAM odometer

DISASSEMBLY
Some of the components for the instrument cluster
used in this vehicle are serviced individually. The
serviced components include: the automatic transmis-
sion gear selector indicator, the incandescent instru-
ment cluster indicator lamp and illumination lamp
bulbs (including the integral bulb holders), the clus-
ter lens and hood unit, and the cluster housing rear
cover. The remaining components are serviced only
as a part of the cluster housing unit, which includes:
the cluster housing, the electronic circuit board unit,
the cluster overlay, the gauges, and the odometer/trip
odometer reset switch button. Following are the pro-
cedures for disassembling the serviced components
from the instrument cluster unit.
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE AIRBAG SYSTEM BEFORE
ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, OR INSTRUMENT PANEL COMPONENT
DIAGNOSIS OR SERVICE. DISCONNECT AND ISO-
LATE THE BATTERY NEGATIVE (GROUND) CABLE,
THEN WAIT TWO MINUTES FOR THE AIRBAG SYS-
TEM CAPACITOR TO DISCHARGE BEFORE PER-
FORMING FURTHER DIAGNOSIS OR SERVICE. THIS
IS THE ONLY SURE WAY TO DISABLE THE AIRBAG
SYSTEM. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.GEAR SELECTOR INDICATOR
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the instrument cluster from the instru-
ment panel. (Refer to 8 - ELECTRICAL/INSTRU-
MENT CLUSTER - REMOVAL).
(3) Remove the steering column opening cover
from the instrument panel. (Refer to 23 - BODY/IN-
STRUMENT PANEL/STEERING COLUMN OPEN-
ING COVER - REMOVAL).
(4) Reach through the instrument panel steering
column opening to access and disengage the loop end
of the gear selector indicator cable from the PRNDL
driver lever on the left side of the steering column
(Fig. 4).
(5) Squeeze the sides of the plastic adjuster and
bracket unit to disengage the tabs that secure it to
the sides of the steering column window.
(6) Remove the gear selector indicator mechanism
and cable unit through the instrument panel cluster
opening.
CLUSTER BULB
This procedure applies to each of the incandescent
cluster illumination lamp or indicator lamp bulb and
bulb holder units. However, the illumination lamps
and the indicator lamps use different bulb and bulb
holder unit sizes. They must never be interchanged.
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the instrument cluster from the instru-
ment panel. (Refer to 8 - ELECTRICAL/INSTRU-
MENT CLUSTER - REMOVAL).
Fig. 3 Gear Selector Indicator Remove/Install
1 - INSTRUMENT CLUSTER
2 - GEAR SELECTOR INDICATOR
3 - SCREW
Fig. 4 Gear Selector Indicator Cable Remove/Install
1 - STEERING COLUMN
2 - CABLE
3 - LOOP END
4 - LEVER
5 - ADJUSTER AND BRACKET
BR/BEINSTRUMENT CLUSTER 8J - 11
INSTRUMENT CLUSTER (Continued)

(3) Turn the bulb holder counterclockwise about
sixty degrees on the cluster electronic circuit board
(Fig. 5).
(4) Pull the bulb and bulb holder unit straight
back to remove it from the bulb mounting hole in the
cluster electronic circuit board.
CLUSTER LENS AND HOOD
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the instrument cluster from the instru-
ment panel. (Refer to 8 - ELECTRICAL/INSTRU-
MENT CLUSTER - REMOVAL).
(3) Remove the seven screws that secure the lens
and hood unit to the cluster housing (Fig. 6).
(4) Gently pull the lens and hood unit away from
the cluster housing.
CAUTION: Do not touch the face of the gauge over-
lay or the back of the cluster lens with your finger.
It will leave a permanent finger print.
CLUSTER HOUSING REAR COVER
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the instrument cluster from the instru-
ment panel. (Refer to 8 - ELECTRICAL/INSTRU-
MENT CLUSTER - REMOVAL).
(3) Remove the six screws that secure the rear
cover to the back of the cluster housing (Fig. 7).
(4) Remove the rear cover from the back of the
cluster housing.CLUSTER HOUSING
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the instrument cluster from the instru-
ment panel. (Refer to 8 - ELECTRICAL/INSTRU-
MENT CLUSTER - REMOVAL).
(3) Remove the lens and hood unit from the cluster
housing. Refer to CLUSTER LENS AND HOOD .
(4) Remove the rear cover from the cluster hous-
ing. Refer to CLUSTER HOUSING REAR COVER .
Fig. 5 Cluster Bulb Remove/Install
1 - INSTRUMENT CLUSTER
2 - BULB AND HOLDER
Fig. 6 Instrument Cluster Components
1 - COVER
2 - HOUSING
3 - OVERLAY AND GAUGES
4 - HOOD
5 - LENS
6 - CIRCUIT BOARD
7 - ODOMETER SWITCH BUTTON
Fig. 7 Cluster Housing Rear Cover Remove/Install
1 - REAR CLUSTER HOUSING COVER
8J - 12 INSTRUMENT CLUSTERBR/BE
INSTRUMENT CLUSTER (Continued)

ASSEMBLY
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE AIRBAG SYSTEM BEFORE
ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, OR INSTRUMENT PANEL COMPONENT
DIAGNOSIS OR SERVICE. DISCONNECT AND ISO-
LATE THE BATTERY NEGATIVE (GROUND) CABLE,
THEN WAIT TWO MINUTES FOR THE AIRBAG SYS-
TEM CAPACITOR TO DISCHARGE BEFORE PER-
FORMING FURTHER DIAGNOSIS OR SERVICE. THIS
IS THE ONLY SURE WAY TO DISABLE THE AIRBAG
SYSTEM. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
GEAR SELECTOR INDICATOR
(1) Position the gear selector indicator mechanism
and cable unit into the instrument panel cluster
opening.
(2) Route the cable through the instrument panel
and under the steering column to the PRNDL driver
lever on the left side of the steering column.
(3) Squeeze the sides of the plastic adjuster and
bracket unit and engage the tabs that secure it with
the sides of the steering column window.
(4) Engage the loop end of the gear selector indi-
cator cable onto the PRNDL driver lever on the left
side of the steering column (Fig. 4).
(5) Reinstall the instrument cluster onto the
instrument panel. (Refer to 8 - ELECTRICAL/IN-
STRUMENT CLUSTER - INSTALLATION).
(6) Confirm proper operation of the gear selector
indicator. Calibrate the indicator, if required. (Refer
to 19 - STEERING/COLUMN - INSTALLATION).
(7) Reinstall the steering column opening cover
onto the instrument panel. (Refer to 23 - BODY/IN-
STRUMENT PANEL/STEERING COLUMN OPEN-
ING COVER - INSTALLATION).
(8) Reconnect the battery negative cable.
CLUSTER BULB
This procedure applies to each of the incandescent
cluster illumination lamp or indicator lamp bulb and
bulb holder units. However, the illumination lamps
and the indicator lamps use different bulb and bulb
holder unit sizes. They must never be interchanged.
CAUTION: Be certain that any bulb and bulb holder
unit removed from the cluster electronic circuit
board is reinstalled in the correct position. Always
use the correct bulb size and type for replacement.
An incorrect bulb size or type may overheat and
cause damage to the instrument cluster, the elec-
tronic circuit board and/or the gauges.(1) Insert the bulb and bulb holder unit straight
into the correct bulb mounting hole in the cluster
electronic circuit board (Fig. 5).
(2) With the bulb holder fully seated against the
cluster electronic circuit board, turn the bulb holder
clockwise about sixty degrees to lock it into place.
(3) Reinstall the instrument cluster onto the
instrument panel. (Refer to 8 - ELECTRICAL/IN-
STRUMENT CLUSTER - INSTALLATION).
(4) Reconnect the battery negative cable.
CLUSTER LENS AND HOOD
CAUTION: Do not touch the face of the gauge over-
lay or the back of the cluster lens with your finger.
It will leave a permanent finger print.
(1) Align the cluster lens and hood unit with the
cluster housing. Be certain that the odometer/trip
odometer switch button is installed through the
clearance hole in the lens (Fig. 6).
(2) Install and tighten the seven screws that
secure the lens and hood unit to the cluster housing.
Tighten the screws to 2.2 N´m (20 in. lbs.).
(3) Reinstall the instrument cluster onto the
instrument panel. (Refer to 8 - ELECTRICAL/IN-
STRUMENT CLUSTER - INSTALLATION).
(4) Reconnect the battery negative cable.
CLUSTER HOUSING REAR COVER
(1) Position the rear cover onto the back of the
cluster housing (Fig. 7).
(2) Install and tighten the six screws that secure
the rear cover to the back of the cluster housing.
Tighten the screws to 2.2 N´m (20 in. lbs.).
(3) Reinstall the instrument cluster onto the
instrument panel. (Refer to 8 - ELECTRICAL/IN-
STRUMENT CLUSTER - INSTALLATION).
(4) Reconnect the battery negative cable.
CLUSTER HOUSING
(1) Assemble the rear cover onto the cluster hous-
ing. Refer to CLUSTER HOUSING REAR COVER .
(2) Assemble the lens and hood unit onto the clus-
ter housing. Refer to CLUSTER LENS AND HOOD .
(3) Reinstall the instrument cluster onto the
instrument panel. (Refer to 8 - ELECTRICAL/IN-
STRUMENT CLUSTER - INSTALLATION).
(4) Reconnect the battery negative cable.
BR/BEINSTRUMENT CLUSTER 8J - 13
INSTRUMENT CLUSTER (Continued)

²Engine Oil Pressure Low Message- Each
time the cluster receives a message from the PCM
indicating the engine oil pressure of a gasoline
engine is about 3.45 kPa (0.5 psi) or lower, or a diesel
engine is about 51.71 kPa (7.5 psi) or lower, the
check gauges indicator will be illuminated. The indi-
cator remains illuminated until the cluster receives a
message from the PCM indicating that the engine oil
pressure of a gasoline engine is above 3.45 kPa (0.5
psi), a diesel engine is above 51.71 kPa (7.5 psi), or
until the ignition switch is turned to the Off position,
whichever occurs first. The cluster will only turn the
indicator on in response to an engine oil pressure low
message if the engine speed is greater than zero.
²System Voltage Low Message- Each time the
cluster receives a message from the PCM indicating
the electrical system voltage is less than 11.5 volts,
the check gauges indicator will be illuminated. The
indicator remains illuminated until the cluster
receives a message from the PCM indicating the elec-
trical system voltage is greater than 12.0 volts (but
less than 16.6 volts), or until the ignition switch is
turned to the Off position, whichever occurs first.
²System Voltage High Message- Each time
the cluster receives a message from the PCM indicat-
ing the electrical system voltage is greater than 16.6
volts, the check gauges indicator will be illuminated.
The indicator remains illuminated until the cluster
receives a message from the PCM indicating the elec-
trical system voltage is less than 16.1 volts (but
greater than 11.5 volts), or until the ignition switch
is turned to the Off position, whichever occurs first.
²Actuator Test- Each time the cluster is put
through the actuator test, the indicator will be
turned on during the bulb check portion of the test to
confirm the functionality of the LED and the cluster
control circuitry.
The PCM continually monitors the engine temper-
ature, oil pressure, and electrical system voltage,
then sends the proper messages to the instrument
cluster. For further diagnosis of the check gauges
indicator or the instrument cluster circuitry that con-
trols the LED, (Refer to 8 - ELECTRICAL/INSTRU-
MENT CLUSTER - DIAGNOSIS AND TESTING).
For proper diagnosis of the PCM, the CCD data bus,
or the message inputs to the instrument cluster that
control the check gauges indicator, a DRBIIItscan
tool is required. Refer to the appropriate diagnostic
information.
CRUISE INDICATOR
DESCRIPTION
A cruise indicator is standard equipment on all
instrument clusters. However, on vehicles notequipped with the optional speed control system, this
indicator is electronically disabled. The cruise indica-
tor consists of the word ªCRUISEº, which appears in
the lower portion of the odometer/trip odometer Vac-
uum-Fluorescent Display (VFD). The VFD is part of
the cluster electronic circuit board, and is visible
through a cutout located in the lower left corner of
the cluster overlay. The dark lens of the VFD pre-
vents the indicator from being clearly visible when it
is not illuminated. The word ªCRUISEº appears in
an amber color and at the same lighting level as the
odometer/trip odometer information when it is illumi-
nated by the instrument cluster electronic circuit
board. The cruise indicator lamp is serviced as a unit
with the VFD in the instrument cluster.
OPERATION
The cruise indicator gives an indication to the vehi-
cle operator when the speed control system is turned
On, regardless of whether the speed control is
engaged. This indicator is controlled by the instru-
ment cluster circuit board based upon the cluster
programming and electronic messages received by
the cluster from the Powertrain Control Module
(PCM) over the Chrysler Collision Detection (CCD)
data bus. The cruise indicator receives battery cur-
rent on the instrument cluster electronic circuit
board through the fused ignition switch output (st-
run) circuit whenever the ignition switch is in the On
or Start positions; therefore, the indicator will always
be off when the ignition switch is in any position
except On or Start. The indicator only illuminates
when it is switched to ground by the instrument clus-
ter circuitry. The instrument cluster will turn on the
cruise indicator for the following reasons:
²Bulb Test- Each time the ignition switch is
turned to the On position the cruise indicator is illu-
minated for about two seconds as a bulb test.
²Cruise Lamp-On Message- Each time the
cluster receives a cruise lamp-on message from the
PCM indicating the speed control system has been
turned On, the cruise indicator is illuminated. The
indicator remains illuminated until the cluster
receives a cruise lamp-off message from the PCM or
until the ignition switch is turned to the Off position,
whichever occurs first.
²Actuator Test- Each time the cluster is put
through the actuator test, the cruise indicator will be
turned on during the VFD portion of the test to con-
firm the functionality of the VFD, and again during
the bulb check portion of the test to confirm the func-
tionality of the cluster control circuitry.
The PCM continually monitors the speed control
switches to determine the proper outputs to the
speed control servo. The PCM then sends the proper
cruise indicator lamp-on and lamp-off messages to
8J - 18 INSTRUMENT CLUSTERBR/BE
CHECK GAUGES INDICATOR (Continued)

MALFUNCTION INDICATOR
LAMP (MIL)
DESCRIPTION
A Malfunction Indicator Lamp (MIL) is standard
equipment on all instrument clusters. The MIL is
located near the lower edge of the instrument cluster
overlay, to the left of center. The MIL consists of a
stencilled cutout of the International Control and
Display Symbol icon for ªEngineº in the opaque layer
of the instrument cluster overlay. The dark outer
layer of the overlay prevents the indicator from being
clearly visible when it is not illuminated. An amber
lens behind the cutout in the opaque layer of the
overlay causes the icon to appear in amber through
the translucent outer layer of the overlay when the
indicator is illuminated from behind by a Light Emit-
ting Diode (LED) soldered onto the instrument clus-
ter electronic circuit board. The MIL is serviced as a
unit with the instrument cluster.
OPERATION
The Malfunction Indicator Lamp (MIL) gives an
indication to the vehicle operator when the Power-
train Control Module (PCM) has recorded a Diagnos-
tic Trouble Code (DTC) for an On-Board Diagnostics
II (OBDII) emissions-related circuit or component
malfunction. In addition, on models with a diesel
engine an Engine Control Module (ECM) supple-
ments the PCM, and can also record an OBDII DTC.
The MIL is controlled by a transistor on the instru-
ment cluster circuit board based upon cluster pro-
gramming and electronic messages received by the
cluster from the PCM or ECM over the Chrysler Col-
lision Detection (CCD) data bus. The MIL Light
Emitting Diode (LED) receives battery current on the
instrument cluster electronic circuit board through
the fused ignition switch output (st-run) circuit
whenever the ignition switch is in the On or Start
positions; therefore, the LED will always be off when
the ignition switch is in any position except On or
Start. The LED only illuminates when it is provided
a path to ground by the instrument cluster transis-
tor. The instrument cluster will turn on the MIL for
the following reasons:
²Bulb Test- Each time the ignition switch is
turned to the On position the indicator is illuminated
for about seven seconds as a bulb test.
²PCM Lamp-On Message- Each time the clus-
ter receives a lamp-on message from the PCM or
ECM, the indicator will be illuminated. The indicator
can be flashed on and off, or illuminated solid, as dic-
tated by the PCM/ECM message. For some DTC's, if
a problem does not recur, the PCM or ECM will send
a lamp-off message automatically. Other DTC's mayrequire that a fault be repaired and the PCM or
ECM be reset before a lamp-off message will be sent.
For more information on the PCM, the ECM, and the
DTC set and reset parameters, (Refer to 25 - EMIS-
SIONS CONTROL - OPERATION).
²Communication Error- If the cluster receives
no lamp-on message from the PCM or ECM for
twenty seconds, the MIL is illuminated by the instru-
ment cluster to indicate a loss of bus communication.
The indicator remains controlled and illuminated by
the cluster until a valid lamp-on message is received
from the PCM or ECM.
²Actuator Test- Each time the cluster is put
through the actuator test, the indicator will be
turned on during the bulb check portion of the test to
confirm the functionality of the LED and the cluster
control circuitry.
The PCM/ECM continually monitor the fuel and
emissions system circuits and sensors to decide
whether the system is in good operating condition.
The PCM/ECM then sends the proper lamp-on or
lamp-off messages to the instrument cluster. For fur-
ther diagnosis of the MIL or the instrument cluster
circuitry that controls the LED, (Refer to 8 - ELEC-
TRICAL/INSTRUMENT CLUSTER - DIAGNOSIS
AND TESTING). If the instrument cluster turns on
the MIL after the bulb test, it may indicate that a
malfunction has occurred and that the fuel and emis-
sions systems may require service. For proper diag-
nosis of the fuel and emissions systems, the PCM,
the ECM, the CCD data bus, or the message inputs
to the instrument cluster that control the MIL, a
DRBIIItscan tool is required. Refer to the appropri-
ate diagnostic information.
ODOMETER
DESCRIPTION
An odometer and trip odometer are standard
equipment in all instrument clusters. The odometer
and trip odometer information are displayed in a
common electronic Vacuum-Fluorescent Display
(VFD), which is visible through a small window cut-
out located in the left lower quadrant of the cluster
overlay. However, the odometer and trip odometer
information are not displayed simultaneously. The
trip odometer reset switch on the instrument cluster
circuit board toggles the display between odometer
and trip odometer modes by depressing the odometer/
trip odometer switch knob that extends through the
lower edge of the cluster lens, just right of the
tachometer. Both the odometer and the trip odometer
information is stored in the instrument cluster mem-
ory.
8J - 24 INSTRUMENT CLUSTERBR/BE

The odometer can display values up to 499,999
kilometers (499,999 miles). The odometer latches at
these values, and will not roll over to zero. The trip
odometer can display values up to 999.9 kilometers
(999.9 miles) before it rolls over to zero. The odome-
ter display does not have a decimal point and will
not show values less than a full unit (kilometer or
mile), the trip odometer display does have a decimal
point and will show tenths of a unit (kilometer or
mile). The unit of measure (kilometers or miles) for
the odometer and trip odometer display is not shown
in the VFD. The unit of measure for the instrument
cluster odometer/trip odometer is selected at the time
that it is manufactured, and cannot be changed. Dur-
ing daylight hours (exterior lamps Off) the VFD is
illuminated at full brightness for clear visibility. At
night (exterior lamps are On) the VFD lighting level
is adjusted with the other cluster illumination lamps
using the panel lamps dimmer thumbwheel on the
headlamp switch. However, a ªParadeº mode position
of the panel lamps dimmer thumbwheel allows the
VFD to be illuminated at full brightness while the
exterior lamps are turned On during daylight hours.
The VFD, the trip odometer switch, and the trip
odometer switch button are serviced as a unit with
the instrument cluster.
OPERATION
The odometer and trip odometer give an indication
to the vehicle operator of the distance the vehicle has
traveled. This gauge is controlled by the instrument
cluster circuit board based upon the cluster program-
ming and electronic messages received by the cluster
from the Powertrain Control Module (PCM) over the
Chrysler Collision Detection (CCD) data bus. The
odometer and trip odometer information is displayed
by the instrument cluster Vacuum Fluorescent Dis-
play (VFD), and the VFD will not display odometer
or trip odometer information after the ignition switch
is turned to the Off position. The instrument cluster
circuitry controls the VFD and provides the following
features:
²Odometer/Trip Odometer Display Toggling-
Actuating the trip odometer reset switch momen-
tarily with the ignition switch in the On position will
toggle the VFD between the odometer and trip odom-
eter display. Each time the ignition switch is turned
to the On position the VFD will automatically return
to the mode (odometer or trip odometer) last dis-
played when the ignition switch was turned to the
Off position.
²Trip Odometer Reset- When the trip odome-
ter reset switch is pressed and held for longer than
about two seconds, the trip odometer will be reset to
000.0 kilometers (miles). The VFD must be display-ing the trip odometer information in order for the
trip odometer information to be reset.
²Message Failure- If the cluster fails to receive
a distance message during normal operation, it will
flash the odometer/trip odometer distance informa-
tion on and off repeatedly until a distance message is
received, or until the ignition switch is turned to the
Off position, whichever occurs first. If the cluster
does not receive a distance message within one sec-
ond after the ignition switch is turned to the On posi-
tion, it will display the last distance message stored
in the cluster memory. If the cluster is unable to dis-
play distance information due to an error internal to
the cluster, the VFD display will be blank.
²Actuator Test- Each time the cluster is put
through the actuator test, the VFD will display all of
its characters at once, then step through each char-
acter segment individually during the VFD portion of
the test to confirm the functionality of the VFD and
the cluster control circuitry.
The PCM continually monitors the vehicle speed
sensor, then sends the proper distance messages to
the instrument cluster. For further diagnosis of the
odometer/trip odometer or the instrument cluster cir-
cuitry that controls these functions, (Refer to 8 -
ELECTRICAL/INSTRUMENT CLUSTER - DIAGNO-
SIS AND TESTING). For proper diagnosis of the
vehicle speed sensor, the PCM, the CCD data bus, or
the message inputs to the instrument cluster that
control the odometer/trip odometer, a DRBIIItscan
tool is required. Refer to the appropriate diagnostic
information.
OIL PRESSURE GAUGE
DESCRIPTION
An oil pressure gauge is standard equipment on all
instrument clusters. The oil pressure gauge is located
in the upper right quadrant of the instrument clus-
ter, above the fuel gauge. The oil pressure gauge con-
sists of a movable gauge needle or pointer controlled
by the instrument cluster circuitry and a fixed 90
degree scale on the cluster overlay that reads left-to-
right either from 0 kPa (0 psi) to 758 kPa (110 psi).
An International Control and Display Symbol icon for
ªEngine Oilº is located on the cluster overlay, directly
below the highest graduation of the gauge scale. The
oil pressure gauge graphics are white against a black
field except for a single red graduation at the low
end of the gauge scale, making them clearly visible
within the instrument cluster in daylight. When illu-
minated from behind by the panel lamps dimmer
controlled cluster illumination lighting with the exte-
rior lamps turned On, the white graphics appear
blue-green and the red graphics appear red. The
BR/BEINSTRUMENT CLUSTER 8J - 25
ODOMETER (Continued)

Compass mini-trip computer units for vehicles
equipped with the VTSS include a red Light-Emit-
ting Diode (LED) on their electronic circuit board.
This LED protrudes through the bottom of the lens
on the front of the overhead console unit, and serves
as the security indicator lamp. Refer toSecurity
Indicator Lampin Vehicle Theft/Security Systems
for more information on this feature.
The compass mini-trip computer module contains a
central processing unit and interfaces with other
electronic modules in the vehicle on the Chrysler Col-
lision Detection (CCD) data bus network. The CCD
data bus network allows the sharing of sensor infor-
mation. This helps to reduce wire harness complexity,
reduce internal controller hardware, and reduce com-
ponent sensor current loads. At the same time, this
system provides increased reliability, enhanced diag-
nostics, and allows the addition of many new feature
capabilities.
The compass mini-trip computer provides several
electronic functions and features. Some of the func-
tions and features that the compass mini-trip com-
puter module supports and/or controls, include the
following display options:
²Compass and temperature- provides the out-
side temperature and one of eight compass readings
to indicate the direction the vehicle is facing.
²Compass and compass in degrees- provides
one of eight compass readings to indicate the direc-
tion the vehicle is facing and provides the compass
direction in degrees.
²Trip odometer (ODO)- shows the distance
travelled since the last trip computer reset.
²Average fuel economy (AVG ECO)- shows
the average fuel economy since the last trip computer
reset.
²Instant fuel economy (ECO)- shows the
present fuel economy based upon the current vehicle
distance and fuel used information.
²Distance to empty (DTE)- shows the esti-
mated distance that can be travelled with the fuel
remaining in the fuel tank. This estimated distance
is computed using the average miles-per-gallon from
the last 30 gallons of fuel used.
²Elapsed time (ET)- shows the accumulated
ignition-on time since the last trip computer reset.
²Blank screen- the compass mini-trip VFD is
turned off.
The ambient temperature sensor is hard wired to
the compass mini-trip computer module. Data input
for all other compass mini-trip computer functions,
including VFD dimming level, is received through
CCD data bus messages. The compass mini-trip com-
puter uses its internal programming and all of these
inputs to calculate and display the requested data. If
the data displayed is incorrect, perform the self-diag-nostic tests as described in this group. If these tests
prove inconclusive, the use of a DRBIIItscan tool
and the proper Diagnostic Procedures manual are
recommended for further testing of the compass
mini-trip computer module and the CCD data bus.
The compass mini-trip computer module cannot be
repaired, and is available for service only as a unit. If
faulty or damaged, the complete module must be
replaced.
OPERATION
The compass mini-trip computer only operates with
the ignition switch in the On position. When the igni-
tion switch is turned to the On position, all of the
segments in the compass mini-trip computer VFD
will be turned on for one second, then the display
will return to the last function being displayed before
the ignition was turned to the Off position. With the
ignition switch in the On position, momentarily
depressing and releasing the Step push button switch
will cause the compass-mini-trip computer to change
its mode of operation, and momentarily depressing
and releasing the U.S./Metric push button will cause
the unit to toggle between U.S. and Metric measure-
ments. While in either compass mode, depressing the
U.S./Metric push button for more than ten seconds
will toggle the display between the compass/temper-
ature and the compass/compass in degrees modes.
This compass mini-trip computer features several
functions that can be reset. If both the Step and U.S./
Metric push buttons are depressed at the same time
with the ignition switch in the On position, the trip
computer information that can be reset is reset.
Depressing and releasing the Step and U.S./Metric
push buttons at the same time for more than 100
milliseconds, but not more than one second while in
any display mode (except the compass/temperature
mode) will cause a local reset. A local reset affects
only the function currently displayed. See the Reset
Chart below for more information on this feature.
Performing a local reset while in the compass/tem-
perature mode enters the module into the compass
variance setting mode.
Depressing and releasing the Step and U.S./Metric
push buttons at the same time for more than two
seconds while in any display mode (except the com-
pass/temperature mode) will cause a global reset. A
global reset changes all of the trip computer func-
tions that can be reset.
For more information on the features and control
functions of the compass mini-trip computer, see the
owner's manual in the vehicle glove box.
BR/BEMESSAGE SYSTEMS 8M - 9
COMPASS/MINI-TRIP COMPUTER (Continued)

MOUNTED - INSTALLATION, SIDE VIEW
MIRROR - LOW......................23-98
MOUNTED - REMOVAL, SIDE VIEW
MIRROR - LOW......................23-98
MOUNTED STOP LAMP - INSTALLATION,
CENTER HIGH........................8L-6
MOUNTED STOP LAMP - REMOVAL,
CENTER HIGH........................8L-6
MOUNTED STOP LAMP UNIT -
INSTALLATION, CENTER HIGH...........8L-6
MOUNTED STOP LAMP UNIT -
REMOVAL, CENTER HIGH...............8L-6
MOUNTING - STANDARD PROCEDURES,
MATCH .............................22-2
MUFFLER - 3.9L/5.2L/5.9L/8.0L -
INSTALLATION.......................11-11
MUFFLER - 3.9L/5.2L/5.9L/8.0L -
REMOVAL..........................11-10
MUFFLER - 5.9L DIESEL - INSTALLATION . 11-11
MUFFLER - 5.9L DIESEL - REMOVAL.....11-11
MULTI-FUNCTION SWITCH -
DESCRIPTION.......................8L-23
MULTI-FUNCTION SWITCH - DIAGNOSIS
AND TESTING.......................8L-25
MULTI-FUNCTION SWITCH -
INSTALLATION.......................8L-28
MULTI-FUNCTION SWITCH - OPERATION . . 8L-24
MULTI-FUNCTION SWITCH - REMOVAL . . . 8L-27
NAME PLATES - INSTALLATION,
EXTERIOR..........................23-89
NAME PLATES - REMOVAL, EXTERIOR....23-89
NECK SEAL - DIAGNOSIS AND TESTING,
RADIATOR CAP-TO-FILLER..............7-66
NEGATIVE CABLE INSTALLATION,
GASOLINE..........................8F-24
NEGATIVE CABLE REMOVAL, GASOLINE . . . 8F-23
NEUTRAL SAFETY SWITCH -
INSPECTION........................30-19
NEW VEHICLE PREPARATION -
DESCRIPTION, THE IMPORTANCE OF
CAREFUL............................30-1
NEW VEHICLE PREPARATION FORM,
FINAL STEPS........................30-22
NIGHT MIRROR - DESCRIPTION,
AUTOMATIC DAY.....................8N-10
NIGHT MIRROR - INSTALLATION,
AUTOMATIC DAY.....................8N-12
NIGHT MIRROR - OPERATION,
AUTOMATIC DAY.....................8N-11
NIGHT MIRROR - REMOVAL,
AUTOMATIC DAY.....................8N-12
NOISE - DIAGNOSIS AND TESTING,
WIND...............................23-3
NOISE - INSPECTION, SQUEAKS,
RATTLES AND WIND..................30-15
NOISE OR VIBRATION - DIAGNOSIS AND
TESTING, TIRE.......................22-8
NOISE SUPPRESSION COMPONENTS -
DESCRIPTION, RADIO.................8A-12
NOISE SUPPRESSION COMPONENTS -
DIAGNOSIS AND TESTING, RADIO.......8A-12
NON-DEPLOYED AIRBAGS - STANDARD
PROCEDURE, HANDLING...............8O-4
NON-MONITORED CIRCUITS - DIESEL -
OPERATION.........................25-23
NON-MONITORED CIRCUITS - GAS
ENGINES - OPERATION................25-22
NOZZLE - DESCRIPTION, WASHER.......8R-9
NOZZLE - INSTALLATION, WASHER.......8R-9
NOZZLE - OPERATION, WASHER.........8R-9
NOZZLE - REMOVAL, WASHER...........8R-9
NUMBER - DESCRIPTION, VEHICLE
IDENTIFICATION...................Intro.-10
NV231HD - ASSEMBLY, TRANSFER CASE . 21-834
NV231HD - CLEANING, TRANSFER CASE . 21-831
NV231HD - DESCRIPTION, TRANSFER
CASE.............................21-820
NV231HD - DISASSEMBLY, TRANSFER
CASE.............................21-822
NV231HD - INSPECTION, TRANSFER
CASE.............................21-832
NV231HD - INSTALLATION, TRANSFER
CASE
.............................21-847
NV231HD - OPERATION, TRANSFER
CASE
.............................21-820
NV231HD - REMOVAL, TRANSFER CASE
. 21-822
NV231HD - TRANSFER CASE
..........21-849
NV241HD - ASSEMBLY, TRANSFER CASE
. 21-904NV241HD - CLEANING, TRANSFER CASE . 21-902
NV241HD - DESCRIPTION, TRANSFER
CASE.............................21-890
NV241HD - DISASSEMBLY, TRANSFER
CASE.............................21-894
NV241HD - INSPECTION, TRANSFER
CASE.............................21-902
NV241HD - INSTALLATION, TRANSFER
CASE.............................21-919
NV241HD - OPERATION, TRANSFER
CASE.............................21-892
NV241HD - REMOVAL, TRANSFER CASE . 21-894
NV241HD - TRANSFER CASE..........21-920
NV241LD - ASSEMBLY, TRANSFER CASE . 21-869
NV241LD - CLEANING, TRANSFER CASE . 21-866
NV241LD - DESCRIPTION, TRANSFER
CASE.............................21-855
NV241LD - DISASSEMBLY, TRANSFER
CASE.............................21-858
NV241LD - INSPECTION, TRANSFER
CASE.............................21-867
NV241LD - INSTALLATION, TRANSFER
CASE.............................21-882
NV241LD - OPERATION, TRANSFER
CASE.............................21-855
NV241LD - REMOVAL, TRANSFER CASE . 21-858
NV241LD - TRANSFER CASE...........21-884
NV3500 - ASSEMBLY, MANUAL.........21-17
NV3500 - CLEANING, MANUAL..........21-15
NV3500 - DESCRIPTION, MANUAL........21-1
NV3500 - DISASSEMBLY, MANUAL........21-5
NV3500 - INSPECTION, MANUAL........21-15
NV3500 - INSTALLATION, MANUAL......21-40
NV3500 - MANUAL...................21-41
NV3500 - OPERATION, MANUAL..........21-1
NV3500 - REMOVAL, MANUAL...........21-3
NV4500 - ASSEMBLY, MANUAL.........21-65
NV4500 - CLEANING, MANUAL..........21-64
NV4500 - DESCRIPTION, MANUAL.......21-44
NV4500 - DISASSEMBLY, MANUAL.......21-48
NV4500 - INSTALLATION, MANUAL......21-82
NV4500 - MANUAL...................21-83
NV4500 - OPERATION, MANUAL.........21-46
NV4500 - REMOVAL, MANUAL..........21-47
NV4500 - SPECIFICATIONS.............21-83
NV5600 - ASSEMBLY, MANUAL........21-110
NV5600 - DESCRIPTION, MANUAL.......21-91
NV5600 - DISASSEMBLY, MANUAL.......21-95
NV5600 - INSTALLATION, MANUAL.....21-125
NV5600 - OPERATION, MANUAL.........21-93
NV5600 - REMOVAL, MANUAL..........21-94
NV5600 - SPECIFICATIONS............21-126
NV5600 MANUAL TRANSMISSION,
SPECIAL TOOLS....................21-127
O2 SENSOR - DESCRIPTION............14-46
O2 SENSOR - INSTALLATION...........14-48
O2 SENSOR - OPERATION.............14-46
O2 SENSOR - REMOVAL...............14-47
ODOMETER - DESCRIPTION............8J-24
ODOMETER - OPERATION..............8J-25
OFF INDICATOR - DESCRIPTION,
OVERDRIVE.........................8J-27
OFF INDICATOR - OPERATION,
OVERDRIVE.........................8J-27
OFF SWITCH - DESCRIPTION,
OVERDRIVE........................21-215
OFF SWITCH - INSTALLATION,
OVERDRIVE........................21-215
OFF SWITCH - OPERATION, OVERDRIVE . 21-215
OFF SWITCH - REMOVAL, OVERDRIVE . . . 21-215
OIL - DESCRIPTION, ENGINE..........0-3,0-4
OIL - DESCRIPTION, REFRIGERANT......24-56
OIL - OPERATION, REFRIGERANT........24-56
OIL - STANDARD PROCEDURE, ENGINE . . 9-104,
9-160,9-217,9-47
OIL - STANDARD PROCEDURE-ENGINE
OIL LEVEL..........................9-295
OIL - STANDARD PROCEDURE-ENGINE
OIL SERVICE........................9-295
OIL COOLER - INSTALLATION, AIR TO
.....7-88
OIL COOLER & LINES - CLEANING AND
INSPECTION
........................9-296
OIL COOLER - REMOVAL, AIR TO
.........7-87
OIL COOLER - REMOVAL, WATER TO
......7-87
OIL COOLER - STANDARD PROCEDURE,
FLUSHING COOLER AND TUBES -
WITHOUT RADIATOR IN-TANK
TRANSMISSION
..............7-80,7-83,7-86OIL COOLER - STANDARD PROCEDURE,
FLUSHING COOLERS AND TUBES -
WITH RADIATOR IN-TANK
TRANSMISSION..............7-79,7-83,7-85
OIL FILTER - INSTALLATION . 9-105,9-161,9-218,
9-296,9-48
OIL FILTER - REMOVAL.....9-105,9-161,9-218,
9-296,9-48
OIL LEAKS - DIAGNOSIS AND TESTING,
ENGINE..............9-104,9-160,9-215,9-47
OIL LEVEL - STANDARD PROCEDURE,
REFRIGERANT.......................24-57
OIL LEVEL, OIL - STANDARD
PROCEDURE-ENGINE.................9-295
OIL PAN - CLEANING . . 9-106,9-162,9-218,9-297,
9-49
OIL PAN - INSPECTION.....9-106,9-162,9-219,
9-297,9-49
OIL PAN - INSTALLATION . . . 9-106,9-162,9-219,
9-297,9-49
OIL PAN - REMOVAL . . 9-105,9-161,9-218,9-296,
9-48
OIL PRESSURE - DIAGNOSIS AND
TESTING, ENGINE . 9-104,9-160,9-215,9-295,9-47
OIL PRESSURE GAUGE - DESCRIPTION . . . 8J-25
OIL PRESSURE GAUGE - OPERATION.....8J-26
OIL PRESSURE RELIEF VALVE -
CLEANING..........................9-297
OIL PRESSURE RELIEF VALVE -
INSPECTION........................9-297
OIL PRESSURE RELIEF VALVE -
INSTALLATION.......................9-298
OIL PRESSURE RELIEF VALVE -
REMOVAL............................9-297
OIL PRESSURE SENSOR/SWITCH -
DESCRIPTION...................9-298,9-49
OIL PRESSURE SENSOR/SWITCH -
INSTALLATION.......................9-299
OIL PRESSURE SENSOR/SWITCH -
OPERATION.....................9-298,9-49
OIL PRESSURE SENSOR/SWITCH -
REMOVAL..........................9-298
OIL PUMP - ASSEMBLE..........9-109,9-165
OIL PUMP - ASSEMBLY................9-51
OIL PUMP - ASSEMBLY . . 21-212,21-382,21-558,
21-729
OIL PUMP - CLEANING.......9-220,9-299,9-50
OIL PUMP - CLEANING . . 21-211,21-381,21-557,
21-728
OIL PUMP - DESCRIPTION......21-208,21-379,
21-554,21-724
OIL PUMP - DISASSEMBLE . . . 9-107,9-163,9-50
OIL PUMP - DISASSEMBLY.....21-209,21-380,
21-555,21-726
OIL PUMP - INSPECTION....9-107,9-163,9-220,
9-299,9-50
OIL PUMP - INSPECTION . 21-211,21-382,21-557,
21-728
OIL PUMP - INSTALLATION . . 9-109,9-165,9-221,
9-300,9-52
OIL PUMP - OPERATION . 21-208,21-379,21-554,
21-724
OIL PUMP - REMOVAL......9-107,9-162,9-219,
9-299,9-50
OIL PUMP VOLUME CHECK - STANDARD
PROCEDURE.....21-209,21-379,21-554,21-724
OIL SEAL - FRONT - DESCRIPTION,
CRANKSHAFT...............9-147,9-34,9-91
OIL SEAL - FRONT - INSTALLATION,
CRANKSHAFT..........9-148,9-277,9-34,9-91
OIL SEAL - FRONT - OPERATION,
CRANKSHAFT...............9-147,9-34,9-91
OIL SEAL - FRONT - REMOVAL,
CRANKSHAFT..........9-147,9-276,9-34,9-91
OIL SEAL - FRONT COVER INSTALLED -
INSTALLATION, FRONT................9-205
OIL SEAL - FRONT COVER INSTALLED -
REMOVAL, FRONT....................9-204
OIL SEAL - FRONT COVER REMOVED -
INSTALLATION, FRONT
................9-205
OIL SEAL - FRONT COVER REMOVED -
REMOVAL, FRONT
....................9-204
OIL SEAL - REAR - DESCRIPTION,
CRANKSHAFT
...............9-148,9-34,9-91
OIL SEAL - REAR - INSTALLATION,
CRANKSHAFT
.....9-149,9-206,9-278,9-35,9-92
OIL SEAL - REAR - OPERATION,
CRANKSHAFT
...............9-148,9-34,9-92
BR/BEINDEX 23
Description Group-Page Description Group-Page Description Group-Page