Instrument Cluster - Description
DESCRIPTION
The instrument cluster (IC) (1) for this vehicle is located directly in front of the driver, above the steering column opening. The mounts and the electrical connections, are concealed within the instrument panel behind various trim panels and the cluster itself. The IC contains various indicators, analog gauges, a Thin Film Transistor (TFT) display unit and an integrated circuit board. The TFT displays odometer information, automatic transmission gear selector position (PRNDL) and several indicators, some of which are market, model or equipment dependent.
The IC also contains the standard equipment Electronic Vehicle Information Center (EVIC). The EVIC provides the outside ambient temperature, compass headings, average fuel economy, elapsed time, numerous textual warning messages, reminder indicators and certain diagnostic information.
The IC can be serviced as several components. The gauges, indicators and electronic circuitry along with the housing itself are only serviced as an assembly and cannot be adjusted or repaired. If a gauge, Light Emitting Diode (LED) unit, the TFT, electronic circuit board, circuit board hardware, cluster overlay or cluster housing is damaged or ineffective, the entire unit must be replaced. The cluster lenses, hood and mask are available for separate service replacement.
VEHICLE SYSTEMS SUPPORT
AUDIBLE WARNINGS
The IC electronic circuit board is equipped with a piezoelectric speaker and programming that allows it to provide various audible alerts to the vehicle operator. These alerts include single chime tones and continuous slow or fast tones. An IC can also produce audible clicks that are used to emulate the sound of a conventional turn signal or hazard warning flasher.
FUEL LEVEL DATA
The IC receives a message from the Body Control Module (BCM) over the Control Area Network (CAN) data bus. The IC uses this information to calculate the proper fuel gauge needle position and to control low fuel indicator operation.
VEHICLE WARNING MESSAGES
When the appropriate conditions exist, messages such as DOOR (door ajar), GATE(liftgate ajar), LOCOOL (low engine coolant), LOWASH (low washer fluid), ESC OFF (Electronic Stability Control in partial off mode), NOBUS (data bus communication fault) or CHANGE OIL appear in the TFT display.
CHANGE OIL MESSAGE
Your vehicle is equipped with an engine oil change indicator system. The CHANGE OIL message flashes in place of the IC odometer value for approximately 12 seconds after a single chime has sounded to indicate the next scheduled oil change interval. The engine oil change indicator system is duty cycle based, which means the engine oil change interval may fluctuate dependent upon your personal driving style.
Unless reset, this message continues to display each time you turn the ignition switch to the ON position. To turn off the message temporarily, press and release the appropriate push button in the Electronic Vehicle Information Center (EVIC) switch pod in the left horizontal spoke of the steering wheel to restore the odometer value display. To reset the oil change indicator system, (after performing the scheduled maintenance) perform the following procedure:
1. Turn the ignition switch to the ON position. (Do not start the engine).
2. Fully press the accelerator pedal slowly three times within 10 seconds.
3. Turn the ignition switch to the LOCK position.
NOTE: If the indicator message illuminates when you start the vehicle, the oil change indicator system did not reset. If necessary, repeat this procedure
ELECTRONIC VEHICLE INFORMATION CENTER DISPLAY
The Electronic Vehicle Information Center (EVIC) system conveniently allows the driver to select a variety of useful information by pressing the appropriate buttons of the EVIC switch pod, which is located in the left horizontal spoke of the steering wheel. The EVIC displays information related to the following:
- Compass display
- Outside temperature display
- System status
- Trip computer functions
- Vehicle information warning message displays
The EVIC display (14) consists of a Thin Film Transistor (TFT) unit soldered to the electronic circuit board and is located between the tachometer on the left and the speedometer on the right.
The odometer value display is located within the TFT and is visible through a window in the cluster overlay with a smoked lens. The dark lens prevents the display from being clearly visible when it is not illuminated. The odometer information is stored in the IC memory. This information can be increased when the proper inputs are provided, 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 (MPH or km/h) for the odometer display is shown in the TFT in the same white 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 Integrated Center Stack (ICS) screen module. The odometer has a RENTAL CAR mode, which will illuminate the odometer information in the EVIC whenever either front door is opened while the status of the ignition switch is OFF or ACCESSORY.
During daylight hours (exterior lamps are OFF) the TFT is illuminated at full brightness for clear visibility. At night (exterior lamps are ON), the TFT lighting level is adjusted with the other cluster general illumination lighting using the panel lamps dimmer function of the interior lighting control. However, a PARADE mode position of the control allows the TFT to be illuminated at full brightness if the exterior lamps are turned ON during daylight hours.
Dual trip odometer (Trip A and Trip B) capability is standard equipment on this vehicle. Both trip odometers appear within the TFT display unit. The trip odometer information is stored in the IC memory. Each trip odometer can display values up to 16099.9 kilometers (9999.9 miles). Each trip odometer will roll over to zero independently when it accumulates these values. The trip odometer minimum value is 0.0 (miles or kilometers) and does have a decimal point to show values in tenths of a full unit (miles or kilometers).
The unit of measure (MPH or km/h) for the trip odometer display is shown next to the Trip A or Trip B text in the TFT in the same white color and at the same lighting level as the trip odometer values. The unit of measure for the trip odometer can be selected using the customer programmable features function of the Integrated Center Stack (ICS) screen module.