Description
DESCRIPTION
The instrument cluster includes the hardware and software necessary to serve as the electronic body control module and is sometimes referred to as the Cab Compartment Node (CCN) (1, 2, and 3). 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 single blue-green digital Vacuum Fluorescent Display (VFD) unit for displaying odometer/trip odometer information, engine hours, automatic transmission gear selector position (PRNDL), several warning or reminder indications and certain diagnostic information.
The CCN gauges and indicators are visible through a dedicated opening in the cluster bezel on the instrument panel and are protected by a clear plastic cluster lens (1). Just behind the cluster lens is the cluster hood and an integral cluster mask (2). The cluster hood and mask are serviced with the lens (1 and 2).
Sandwiched between the rear cover and the lens is the cluster housing (3). The molded plastic cluster housing serves as the carrier for the cluster circuit board and circuitry, the cluster connector receptacles, the gauges, a Light Emitting Diode (LED) for each cluster indicator, the VFD unit, an audible tone transducer, the cluster overlay, the gauge pointers, the odometer/trip odometer switch and the Electronic Vehicle Information Center Display (EVIC) switch button.
DOMESTIC CLUSTER/CCN WITH EVIC
The Domestic CCN includes the following analog gauges:
- Engine Temperature Gauge (3)
- Fuel Gauge (1)
- Speedometer (4)
- Tachometer (5)
The CCN includes the following VFD units:
- Transmission range indicator (6)
- Tire pressure monitoring light (7)
- Odometer/Trip Odometer (8)
- Electronic Vehicle Information Center (EVIC) Display {26}
The CCN includes provisions for the following indicators:
- Airbag Warning Indicator (23)
- Antilock Brake System (ABS) Warning Indicator (21)
- Park Brake/Brake Indicator (15)
- Charging System Warning Indicator (12)
- Cruise Indicator (9)
- Electronic Vehicle Information Center (EVIC) Display Step Button {25}
- Fog Lamp Indicator (20)
- Fuel Door Location (2)
- High Beam Indicator (24)
- High Engine Temperature Warning Indicator (17)
- Low Fuel Indicator (18)
- Malfunction Indicator Lamp (MIL) (10)
- Odometer/Trip Odometer A/B Select Button (11)
- Oil Pressure Warning Indicator (22)
- Seatbelt Indicator (16)
- Security Indicator (19)
- Traction Control Indicator (14)
- Turn Signal (Right and Left) Indicators (13)
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 Controller Area Network (CAN) 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 the transmission of electronic message outputs to other electronic modules in the vehicle over the CAN/LIN data bus Description.
BUX GAS CLUSTER/CCN
The BUX Gas CCN is relatively the same as domestic for the exception of:
- Brake Fail/Park Brake Indicator (12)
- Electronic Throttle Control (ETC) Indicator (28)
- Rear Fog lamps Indicator (26)
- Speedometer (4) - Kilometers per hour (km/h)
- Tire pressure monitoring light (29)
- Malfunction Indicator Lamp (MIL) (9)
BUX DIESEL CLUSTER/CCN
The BUX Diesel CCN is relatively the same as domestic for the exception of:
- Rear Fog lamps Indicator (26)
- Speedometer (4) - Kilometers per hour (km/h)
- Brake Fail/Park Brake Indicator (12)
- Wait to Start Indicator (27)
- Malfunction Indicator Lamp (MIL) (9)
- Tire pressure monitoring light (26)
The CCN houses four analog gauges and has provisions for up to twenty-five indicators. All of the CCN indicators are automatically configured when the CCN is connected to the vehicle electrical system for compatibility with certain optional equipment or equipment required for regulatory purposes in certain markets. While each CCN may have provisions for indicators to support every available option, the configurable indicators will not be functional in a vehicle that does not have the equipment that an indicator supports.
Each indicator in the CCN, except those located within the VFD unit, 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.