Sprinter 3500 L5-2.7L DSL Turbo (2004)
Odometer: Description and Operation
An odometer and trip odometer are standard equipment in all instrument clusters. The odometer and trip odometer values are displayed on the left side of
the multi-function indicator Liquid Crystal Display (LCD). The LCD is soldered onto the cluster electronic circuit board and is visible through a window
with a clear lens located near the lower edge of the instrument cluster, directly below the speedometer. However, the odometer and trip odometer
information are not displayed simultaneously. The "mi" (miles) or "km" (kilometers) switch on the instrument cluster circuit board toggles the display
between odometer and trip odometer modes by depressing the switch push button that extends through the lower edge of the cluster lens, directly below
the multifunction indicator LCD.
The odometer and trip odometer information is stored in the instrument cluster memory. This information can be increased when the proper inputs are
provided to the instrument cluster, but the information cannot be decreased. The odometer can display values up to 999,999 kilometers (999,999 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 odometer display does not have a decimal point and will not show values less than a full unit (kilometer or mile), while 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 imprinted on the cluster overlay below the left end of the LCD. The unit of measure for the instrument cluster
odometer/trip odometer is selected at the time that it is manufactured, and cannot be changed.
The indications of the odometer/trip odometer are not visible when the LCD is not illuminated. When illuminated the indications appear as dark
characters silhouetted against an amber field. When the exterior lighting is turned Off, the display is illuminated at maximum brightness. When the
exterior lighting is turned On the display illumination level can be adjusted in concert with the cluster general illumination lighting using the plus and
minus multifunction indicator push buttons. The odometer has a "Rental Car" mode, which will activate the multifunction indicator LCD and illuminate
the odometer information for about thirty seconds after one of the multi-function indicator push buttons is momentarily depressed, or after the key is
inserted into the ignition switch lock cylinder with the ignition switch in the Off position.
The odometer/trip odometer and the miles/kilometers switch, and the miles/kilometers switch push button are serviced as a unit with the instrument
cluster.
The odometer and trip odometer give an indication to the vehicle operator of the distance the vehicle has traveled. This indicator is controlled by the
instrument cluster circuitry based upon cluster programming and electronic messages received by the cluster from the Controller Anti-lock Brake (CAB)
over the Controller Area Network (CAN) data bus. The odometer and trip odometer information is displayed by the multi-function indicator Liquid
Crystal Display (LCD). The LCD will display the odometer information whenever it is activated, and will display the last previously selected odometer
or trip odometer information when the ignition switch is turned to the On position. The instrument cluster circuitry controls the LCD and provides the
following features:
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Odometer/Trip Odometer Display Toggling -Actuating the multi-function indicator "mi" (miles) or "km" (kilometers) switch push button
momentarily with the LCD illuminated will toggle the display between the odometer and trip odometer information. Each time the LCD is
illuminated with the ignition switch in the On or Start positions, the display will automatically return to the last mode previously selected
(odometer or trip odometer).
-
Trip Odometer Reset - When the multi-function indicator "mi" (miles) or "km" (kilometers) switch push button is pressed and held for longer
than about two seconds, the trip odometer will be reset to 000.0 kilometers (miles). The LCD must be displaying the trip odometer information in
order for the trip odometer information to be reset.
The CAB continually monitors the vehicle speed pulse information received from the four wheel speed sensors, then sends the proper distance messages
to the instrument cluster. For proper diagnosis of the wheel speed sensors, the CAB, the CAN data bus, or the electronic message inputs to the instrument
cluster that control the odometer/trip odometer, a DRBIII(R) scan tool is required. Refer to the appropriate diagnostic information.
