Dakota 2WD V6-3.9L VIN X (1997)
CIRCUIT OPERATION
Seat Belt Warning Chime
The seat belt chime is used to indicate to the operator that the seat belt is not fastened when the ignition switch is in the RUN position. The seat
belt switch is normally OPEN with the seat belt buckled. Circuit G10 is connected between the Central Timer Module (CTM) and the switch.
Ground for the switch is provided on circuit Z1.
Exterior Lamp-On Warning Chime
The exterior lamp ON chime is used to indicate to the operator that the lamps are ON with the drivers door OPEN and the key removed from the
ignition. The Central Timer Module (CTM) uses information from circuit G26 to determine if the lamps are ON, and circuit G16 for drivers door
ajar.
Key-In Ignition Warning Chime
The Key-In chime is used to indicate to the operator that the key is in the ignition with the driver's door OPEN. If the key is in the ignition, a
ground path is completed from the G26 circuit at the Central Timer Module (CTM), through the CLOSED switch, to the Z1 circuit. The Z1 circuit
is the ground circuit.
When the driver's door is open the normally OPEN door ajar switch CLOSES completing a path to ground on circuit G16. The CTM processes
this information and turns on the chime.
Compass Mini-Trip Computer (CMTC)
SYSTEM OPERATION
A mini trip computer is available on this model to provide several electronic functions and features. The trip computer contains a central
processing unit and interfaces with other modules in the vehicle on the Chrysler Collision Detection (CCD) data bus network.
The CCD data bus network allows the sharing of sensor information. This helps to reduce wire harness complexity, reduce internal controller
hardware, and reduce component sensor current loads. At the same time, this system provides increased reliability, enhanced diagnostics, and
allows the addition of many new feature capabilities.
Some of the functions and features that the trip computer supports and/or controls, include the following display options:
-
Compass and temperature
-
Trip odometer (ODO)
-
Average fuel economy (AVG ECO)
-
Instant fuel economy (ECO)
-
Distance to empty (DTE)
-
Elapsed time (ET)
-
Blank display
Momentarily depressing and releasing the Step button when the ignition switch is in the On position will cause the overhead console display to
step sequentially through the listed display options. Momentarily depressing and releasing the U.S./Metric button toggles the display between U.S.
and Metric measurements. For more information on the trip computer features and functions, refer to the owner 5 manual in the vehicle glove box.
The push button (Step and U.S./Metric) switches and the compass flux-gate unit are integral to the trip computer, compass, and thermometer
display module unit. The ambient temperature sensor is hard-wired to the module. Data input for all other trip computer functions is received
through CCD data bus messages. The trip computer 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-diagnostic tests as described. If these tests prove inconclusive, the use of a DRB scan tool
and the proper Diagnostic Procedures are recommended for further testing of the trip computer and the CCD data bus.
The trip computer, compass, and thermometer display module cannot be repaired, and are only available for service as a unit. If faulty or damaged,
the complete module must be replaced.
COMPASS MINI-TRIP COMPUTER (CMTC)
This system, located in the overhead console, displays information on outside temperature, compass direction and trip information.
Compass And Temperature Display
This display provides the outside temperature and one of eight compass readings to indicate the direction the vehicle is facing.
Trip Odometer (ODO)
Shows the distance travelled since the last reset.
Average Fuel Economy (AVE ECO)
Shows the average fuel economy in MPG (miles per gallon) or L/100Km since the last reset.
Instantaneous Fuel Economy
