DESCRIPTION
An overhead console is standard factory-installed equipment on this model. The overhead console includes an Electronic Vehicle Information Center Module with or without a universal transmitter. All overhead consoles are equipped with two reading and courtesy lamps. On vehicles equipped with a power sunroof, the sunroof switch is located between the two reading and courtesy lamps. The overhead console is mounted with one screw in the front and two snap clips in the rear. A molded plastic retainer bracket located above the headliner is used to provide secure overhead console attachment.
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If any of the EVIC functions are faulty or damaged, the complete EVIC module must be replaced. Replaceable overhead console components include the incandescent bulbs used for push button back-lighting, courtesy lamps, lens, EVIC module and the overhead console housing. See STANDARD PROCEDURE for additional information.
OPERATION
Refer to the vehicle Owners Manual for specific operation of overhead console and its systems.
The Electronic Vehicle Information Center (EVIC) module is located in the overhead console on some models. The EVIC module features a large Vacuum Fluorescent Display (VFD) screen for displaying information, and back-lit push button function switches labeled C/T (compass/temperature), RESET, STEP, and MENU.
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The EVIC module contains a central processing unit and interfaces with other electronic modules in the vehicle over the Programmable Communications Interface (PCI) data bus network. The PCI data bus network allows the sharing of sensor information. This helps to reduce wire harness complexity, reduce internal controller hardware, and reduce component sensor current loads. At the same time, this system provides increased reliability, enhanced diagnostics, and allows the addition of many new feature capabilities.
The EVIC includes the following display options
- Average Fuel Economy - provides the average fuel economy the vehicle is achieving.
- Distance To Empty - provides the approximate distance the vehicle can be driven on the current fuel level.
- Trip Odometer - shows the accumulated miles since the last trip computer reset.
- Elapsed time - shows the accumulated ignition-on time since the last trip computer reset.
- Service Mileage - shows the distance remaining until the next scheduled service interval.
- Individual Tire Pressure - shows the current individual tire air pressures.
- Blank - the EVIC computer VF display is turned off.
The EVIC "Menu" push button provides the vehicle operator with a user interface, which allows the selection of several optional customer programmable electronic features to suit individual preferences. See STANDARD PROCEDURE - ELECTRONIC VEHICLE INFORMATION CENTER PROGRAMMING for more information on the customer programmable feature options.
If the vehicle is equipped with the optional Universal Transmitter, the EVIC will also display messages and an icon indicating when the Universal Transmitter is being trained, which of the three transmitter buttons is transmitting, and when the transceiver is cleared.
Data input for all EVIC functions, including VFD dimming level, is received through PCI data bus messages. The EVIC module uses its internal programming and all of its data inputs to calculate and display the requested data. If the data displayed is incorrect, perform the self-diagnostic tests as described in this group. If these tests prove inconclusive, the use of a DRB III(R) scan tool and the proper diagnostic procedures are recommended for further testing of the EVIC module and the PCI data bus.
The EVIC module cannot be repaired, and is available for service only as a unit. This unit includes the push button switches and the plastic module. If any of these components is faulty or damaged, the complete EVIC module must be replaced. The incandescent bulbs used for EVIC push button back-lighting and the lens are available for service replacement.
DESCRIPTION - COMPASS
While in the compass/temperature mode, the compass will display the direction in which the vehicle is pointed using the eight major compass headings (Examples: north is N, northeast is NE). The self-calibrating compass unit requires no adjusting in normal use. The only calibration that may prove necessary is to drive the vehicle in three complete circles at 5 to 8 kilometers-per-hour (3 to 5 miles-per-hour), on level ground, in not less than forty-eight seconds. This will reorient the compass unit to its vehicle.
The compass unit also will compensate for magnetism the body of the vehicle may acquire during normal use. However, avoid placing anything magnetic directly on the roof of the vehicle. Magnetic mounts for an antenna, a repair order hat, or a funeral procession flag can exceed the compensating ability of the compass unit if placed on the roof panel. Magnetic bit drivers used on the fasteners that hold the overhead console assembly to the roof header can also affect compass operation. If the vehicle roof should become magnetized, the demagnetizing and calibration procedures found in this group may be required to restore proper compass operation.
DESCRIPTION - TEMPERATURE
The temperature displays the outside ambient temperature in whole degrees. The temperature display can be toggled from Fahrenheit to Celsius by selecting the desired U.S./Metric option from the customer programmable features as described in STANDARD PROCEDURE - ELECTRONIC VEHICLE INFORMATION CENTER PROGRAMMING . The displayed temperature is not an instant reading of conditions, but an average temperature. It may take the thermometer display several minutes to respond to a major temperature change, such as driving out of a heated garage into winter temperatures.
When the ignition switch is turned to the Off position, the last displayed temperature reading stays in the EVIC unit memory. When the ignition switch is turned to the On position again, the EVIC will display the memory temperature for one minute; then update the display to the current average temperature reading within five minutes if temperature is less than memory.
The temperature function is supported by an ambient temperature sensor. The sensor is mounted outside the passenger compartment near the front and center of the vehicle, and is hard wired to the Powertrain Control Module (PCM). The PCM sends temperature status messages to the EVIC module over the PCI data bus network. The ambient temperature sensor is available as a separate service item.
The EVIC has access to both non-switched and ignition switched sources of battery current so that some of its features remain operational at any time, while others may only operate with the ignition switch in the On position. When the ignition switch is turned to the On position, the EVIC module VFD will return to the last function being displayed before the ignition was turned to the Off position.
The compass/temperature display is the normal EVIC display. With the ignition switch in the On position, momentarily depressing and releasing the C/T (compass/temperature) push button switch will cause the EVIC to return to the compass/temperature display mode from any other mode. While in the compass/temperature display mode, momentarily depressing and releasing the Step push button will step through the available trip computer display options.
The EVIC trip computer features several functions that can be reset. The functions that can be reset are: average fuel economy, trip odometer and elapsed time. With the ignition switch in the On position and with one of the functions of the trip computer that can be reset currently displayed, depressing the Reset push button twice within three seconds will perform a global reset, and all of the trip computer information that can be reset will be reset. With the ignition switch in the On position and the function that is to be reset currently displayed, momentarily depressing and releasing the Reset push button once will perform a local reset, and only the value of the displayed function will be reset to zero. A global or local reset will only occur if the function currently displayed is a function that can be reset. The distance to service function can also be reset by pressing and holding the RESET button for 1 second. Refer to STANDARD PROCEDURE - ELECTRONIC VEHICLE INFORMATION CENTER PROGRAMMING for more information on setting the Service Interval.
For more information on the features, control functions and setting procedures for the EVIC module, see the owners manual in the vehicle glove box.
On some KJ models a Universal Transmitter transceiver is standard factory-installed equipment. The universal transmitter transceiver is integral to the Electronic Vehicle Information Center Computer (EVIC), which is located in the overhead console. The only visible component of the universal transmitter are the three center transmitter push buttons centered between the four EVIC push buttons located just rearward of the EVIC display screen in the overhead console. The three universal transmitter push buttons are identified with one, two or three light indicators so that they be easily identified by sight.
Each of the three universal transmitter push buttons controls an independent radio transmitter channel. Each of these three channels can be trained to transmit a different radio frequency signal for the remote operation of garage door openers, motorized gate openers, home or office lighting, security systems or just about any other device that can be equipped with a radio receiver in the 286 to 399 MegaHertz (MHz) frequency range for remote operation. The universal transmitter is capable of operating systems using either rolling code or non-rolling code technology.
The EVIC module displays messages and a small house-shaped icon with one, two or three dots corresponding to the three transmitter buttons to indicate the status of the Universal Transmitter.
The Universal Transmitter cannot be repaired, and is available for service only as a unit with the EVIC module. This unit includes the push button switches and the plastic module and display lens. If any of these components is faulty or damaged, the complete EVIC module must be replaced.
The universal transmitter operates on a non-switched source of battery current so the unit will remain functional, regardless of the ignition switch position. For more information on the features, programming procedures and operation of the universal transmitter, see the owners manual in the vehicle glove box.
The ambient temperature sensor is a variable resistor that operates on a five-volt reference sent to it by the Powertrain Control Module (PCM). The resistance in the sensor changes as temperature changes. This changes the temperature sensor return signal circuit voltage to the PCM. Based upon the resistance in the sensor, the PCM is programmed to correspond to a specific temperature. The PCM then sends the proper ambient temperature messages to the EVIC over the PCI data bus.
The thermometer function is supported by the ambient temperature sensor, a wiring circuit, the Powertrain Control Module (PCM), the Programmable Communications Interface (PCI) data bus, and a portion of the Electronic Vehicle Information Center (EVIC) Computer module.
The ambient temperature sensor circuit can also be diagnosed by referring to DIAGNOSIS AND TESTING - AMBIENT TEMPERATURE SENSOR and DIAGNOSIS AND TESTING - AMBIENT TEMPERATURE SENSOR CIRCUIT . If the temperature sensor and circuit are confirmed to be OK, but the temperature display is inoperative or incorrect, refer to DIAGNOSIS AND TESTING - ELECTRONIC VEHICLE INFORMATION CENTER .