Commander 4WD V8-4.7L VIN N (2006)
Odometer: Description and Operation
Odometer
ODOMETER
DESCRIPTION
An odometer is standard factory-installed equipment on this model. The odometer is located within the fixed segment Organic Light Emitting Diode
(OLED) display unit. The odometer information is displayed in the lower area of the OLED display.
The fixed segment OLED display unit is soldered onto the cluster electronic circuit board, and is visible through a window with a smoked clear lens
located on the lower edge of the speedometer gauge dial face of the cluster overlay. The dark lens over the OLED prevents it from being clearly visible
when it is not illuminated. The odometer has a Rental Car mode, which will illuminate the odometer information in the OLED whenever either front door
is opened with the ignition switch in the OFF or ACCESSORY positions.
The 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 odometer display does not show leading zeroes, does not have a decimal point and will not show values less than a full unit (kilometer or mile). The
unit of measure (km or miles) for the odometer display is shown in the fixed segment OLED in the same blue-green color and at the same lighting level
as the odometer values. The unit of measure for the odometer can be selected using the customer programmable features function of the Electronic
Vehicle Information Center (EVIC).
During daylight hours (exterior lamps are OFF) the fixed segment OLED is illuminated at full brightness for clear visibility. At night (exterior lamps are
ON), the OLED lighting level is adjusted with the other cluster illumination lamps using the panel lamps dimmer function of the interior lighting control
sleeve on the left multi-function switch control stalk. However, a Parade mode position of the control sleeve allows the OLED to be illuminated at full
brightness if the exterior lamps are turned ON during daylight hours.
The odometer is serviced as a unit with the fixed segment OLED display unit in the instrument cluster.
OPERATION
The odometer gives 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 Powertrain Control Module (PCM) over the
Controller Area Network (CAN) data bus.
The odometer information is displayed by the instrument cluster fixed segment Organic Light Emitting Diode (OLED) display. The OLED will display
the odometer information whenever either front door is opened with the ignition switch in the OFF or ACCESSORY positions. The instrument cluster
circuitry controls the OLED and provides the following features:
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Communication Error - If the cluster fails to receive a distance message during normal operation, it will hold and display the last data received
until the ignition switch is turned to the OFF position. If the cluster does not receive a distance message within one second after the ignition switch
is turned to the ON position, it will display the last distance message stored in the cluster memory. If the cluster is unable to display distance
information due to an error internal to the cluster, the OLED will display dashes - - - - - -.
-
Actuator Test - Each time the cluster is put through the actuator test, the odometer OLED will display all of its segments simultaneously during
the OLED portion of the test to confirm the functionality of the OLED and the cluster control circuitry.
The PCM continually monitors the vehicle speed pulse information received from the wheel speed sensors, then sends the proper distance messages to
the instrument cluster. For proper diagnosis of the wheel speed sensors, the PCM, the CAN data bus, or the electronic message inputs to the instrument
cluster that control the odometer a diagnostic scan tool is required.
