Instrument Cluster - Service Information: Description
The instrument cluster (3) for this model is an ElectroMechanical Instrument Cluster (EMIC) that is located in the instrument panel above the steering column opening, directly in front of the driver. The remainder of the EMIC, including the mounts and the electrical connections, are concealed within the instrument panel behind the cluster bezel (2). Besides analog gauges and indicators, the EMIC module incorporates two blue-green digital Vacuum Fluorescent Display (VFD) units. One is for displaying odometer/trip odometer information, engine hours, automatic transmission gear selector position (PRNDL), several warning or reminder indications and certain diagnostic information. The second is the Electronic Vehicle Information Center (EVIC) display that will display things such as compass/temperature, miles per gallon, average fuel economy, distance till empty, etc. The instrument cluster for this model also includes the hardware and software necessary to serve as the electronic body control module and is sometimes referred to as the Cab Compartment Node or CCN.
The EMIC gauges and indicators (5) are visible through a dedicated opening in the cluster bezel on the instrument panel and are protected by a clear plastic cluster lens (3), and the integral hood. The cluster hood serves as a visor and shields the face of the cluster from ambient light and reflections to reduce glare. The molded plastic EMIC lens, hood and mask unit has two integral mounting tabs on the upper edges of the unit. These mounting tabs are used to secure the EMIC to the molded plastic instrument panel cluster carrier with four screws.
The rear of the cluster housing and the EMIC electronic circuitry are protected by a molded plastic rear cover (1), which is secured to the cluster housing. The rear cover includes clearance holes for the cluster connector receptacles. The connector receptacles on the back of the cluster electronic circuit board connect the EMIC to the vehicle electrical system through three take outs with connectors from the instrument panel wire harness.
The EMIC houses four analog gauges and has provisions for up to twenty-five indicators. Some of the EMIC indicators are automatically configured when the EMIC is connected to the vehicle electrical system for compatibility with certain optional equipment or equipment required for regulatory purposes in certain markets. While each EMIC 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.
The EMIC includes the following analog gauges:
- Engine Temperature Gauge (13)
- Fuel Gauge (21)
- Speedometer (1)
- Tachometer (8)
The EMIC includes the following VFD units:
- Gear Selector/Odometer/Trip A B/engine hours (20)
- Electronic Vehicle Information Center (EVIC) Display (14) - This displays the customer programmable features and status of them, the "Check Gauges" warning message, and the door ajar indication.
The EMIC includes provisions for the following indicators:
- Airbag Indicator (6)
- Antilock Brake System (ABS) Indicator (7)
- Brake Indicator (2)
- Charging Indicator (24)
- Cruise Indicator (18)
- Door Ajar Indicator (14 - within the EVIC VFD)
- Electronic Throttle Control (ETC) Indicator (22)
- Engine Temperature Indicator (13 - within temperature gauge)
- Four-Wheel Drive Low Indicator (16)
- Front Fog Lamp Indicator (23)
- Gate Ajar Indicator (14 - within EVIC VFD)
- High Beam Indicator (4)
- Low Fuel Indicator (21 - within fuel gauge)
- Low Oil Pressure Indicator (10)
- Malfunction Indicator Lamp (MIL) (5)
- Seat Belt Indicator (17)
- Security Indicator (9)
- Tow/Haul Indicator (15)
- Traction Control Indicator (11)
- Turn Signal (Right and Left) Indicators (3)
- Washer Fluid Indicator (14 - within EVIC VFD)
Each indicator in the EMIC, except those located within a VFD unit, is illuminated by a dedicated LED that is soldered onto the EMIC electronic circuit board. Cluster illumination is accomplished by a dimmable electro-luminescent lamp, which illuminates each of the gauge dial faces for visibility when the exterior lighting is turned on. The LED units and the electro-luminescent lamp unit are not available for service replacement and, if damaged or faulty, the entire EMIC must be replaced.
Hard wired circuitry connects the EMIC to the electrical system of the vehicle. These hard wired circuits are integral to several wire harnesses, which are routed throughout the vehicle and retained by many different methods. These circuits may be connected to each other, to the vehicle electrical system and to the EMIC through the use of a combination of soldered splices, splice block connectors, and many different types of wire harness terminal connectors and insulators. Refer to SYSTEM WIRING DIAGRAMS . The wiring information includes wiring diagrams, proper wire and connector repair procedures, further details on wire harness routing and retention, as well as pin-out and location views for the various wire harness connectors, splices and grounds.
The EMIC module for this model is serviced only as a complete unit. The EMIC module 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 EMIC housing are damaged or faulty, the entire EMIC module must be replaced. The cluster lens, hood and mask unit is available for separate service replacement.