Instrument Cluster - Description
DESCRIPTION
The instrument Cluster, sometimes referred to as the Cab Compartment Node (CCN), and gauge pack is Electromechanical that is located in the instrument panel above the steering column opening, behind the steering wheel, directly in front of the driver and just to his right. The remainder of the CCN, including the mounts and the electrical connections, are concealed within the instrument panel behind the cluster bezel. Besides analog gauges and indicators, the CCN incorporates a digital Vacuum Fluorescent Display (VFD) unit for displaying odometer/trip odometer information, several warning or reminder indications and certain diagnostic information.
Sandwiched between the rear cover and the lens is the cluster housing. The molded plastic cluster housing serves as the carrier for the cluster circuit board and circuitry, the cluster connectors, the gauges, a Light Emitting Diode (LED) for each cluster indicator, the VFD unit, an audible tone transducer, the cluster overlay, the gauge pointers, and the odometer/trip odometer switch.
Several versions of the CCN are offered. These versions accommodate all of the variations of optional equipment and regulatory requirements for the various markets in which the vehicle will be offered. The microprocessor-based CCN utilizes integrated circuitry and information carried on the Programmable Communication Interface (PCI) data bus along with several hard wired analog and multiplexed inputs to monitor sensors and switches throughout the vehicle. In response to those inputs, the internal circuitry and programming of the CCN allow it to control and integrate many electronic functions and features of the vehicle through both hard wired outputs and of electronic message outputs to other electronic modules in the vehicle over the PCI/CAN data bus's Communication - Description.
Each indicator in the CCN, except those located within the VFD units, is illuminated by a dedicated LED that is soldered onto the CCN electronic circuit board. Cluster illumination is accomplished by dimmable LED back lighting, which illuminates each of the gauges for visibility when the exterior lighting is turned on. The LED units are not available for service replacement and, if damaged or faulty, the entire CCN must be replaced.
The CCN is serviced only as a complete unit. The CCN cannot be adjusted or repaired. If a gauge, an LED indicator, a VFD unit, the electronic circuit board, the circuit board hardware, the cluster overlay, or the CCN housing are damaged or faulty, the entire CCN must be replaced. The cluster lens, hood and mask unit are available for separate service replacement.
The CCN and gauge pack includes the following analog gauges and indicators located within:
- Coolant Temperature Gauge (14) and High Coolant Temperature Indicator (15)
- Fuel Gauge (1) and Low Fuel Indictor (21)
- Oil Pressure Gauge (10) and Low Oil Pressure Indicator (11)
- Oil Temperature Gauge (13)
- Passenger Airbag OFF Indicator (12)
- Speedometer (9) and VFD unit (18)
- Tachometer (6) and Skip Shift Indicator (20)
- Voltage Gauge (16) and Low/High Charging Voltage Indicator (17)
The Message Centers (3) include the following indicators:
- ABS Indicator (7)
- Airbag Indicator (28)
- Brake Warning Indicator (22)
- Electronic Throttle Control Indicator (23)
- Front Fog Lamp On Indicator (5)
- Hazard Warning Indicator (26)
- Headlamp High Beam Indicator (2)
- MIL Indicator (8)
- Seat Belt Indicator (25)
- Tire Pressure Monitoring System Indicator (24)
- Turn Signal Indicators (4)
The CCN includes one VFD unit (18) and will display various warning/reminder messages:
- DOOR AJAR
- DOOR UNLOCKED
- LO TIRE
- FLAT TIRE
- ODOMETER
- TRIP ODOMETER