Scheme 1
An overhead console is standard on this vehicle and includes the following components
- Overhead storage compartment (1)
- Front map/reading lamps (2)
- Power sunroof switch (3) - if equipped
- Universal transmitter (4)
- Electronic Overhead Module
Scheme 2
The overhead console assembly is mounted by three snap clips (1) securing it to a molded plastic retainer bracket located above the headliner. The Electronic Overhead Module is secured to the overhead console with screws (2).
Scheme 3
- Disconnect and isolate the battery negative cable.
- Pull downward on the sides of the overhead console housing firmly and evenly to disengage the snap clips from the overhead console bracket.
- Lower the overhead console from the headliner far enough to access the wire harness connectors (2).
- Disconnect the roof wire harness connectors (2) from the overhead console wire harness connector.
- Remove the overhead console from the headliner.
OPERATION
The Electronic Vehicle Information Center (EVIC) uses 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 display will return to the last function being displayed before the ignition was turned to the Off position.
The EVIC system is comprised of several different components that communicate over the Controller Area Network (CAN) and Local Interface Network (LIN) Data Buses. If the system is inoperative a scan tool and the appropriate diagnostic information must be used to diagnose the system.
Scheme 4
The steering wheel switches are used to operate the different functions of the EVIC system. Pressing and releasing the MENU button (1) will change the mode displayed between Trip Functions, Navigation (If Equipped), System Status, Personal Settings, and Telephone (If Equipped). Pressing and releasing the C/T (compass/thermometer) button (3) will cause the EVIC to return to the compass/thermometer/trip computer display mode from any other mode.
Scheme 5
The SCROLL buttons (3) are used to scroll through Trip Functions, Navigation (If Equipped), System Status Messages, and Personal Settings (Customer Programmable Features). Pressing and releasing the FUNCTION SELECT button (1) accepts a selected choice. The AUDIO MODE SELECT button (2) changes the mode of the radio from AM to FM to Tape to CD, or to Satellite (SAT) depending on which radio is in the vehicle. This button can also be used to return to a previous navigation menu selection.
DESCRIPTION
The universal transmitter transceiver is integral to the overhead console. The only visible component of the universal transmitter are the three transmitter push buttons (4) at the front of the overhead console. The buttons are marked with one, two or three illuminated dots, respectively, for identification of each channel.
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 system will not transmit operating signals if the Vehicle Theft Security System is armed.
The universal transmitter cannot be repaired, and is available for service only as a unit. This unit includes the push button switches and the plastic module.
The ambient temperature sensor is a variable resistor that operates on a five-volt reference signal sent by the Front Control Module (FCM). The resistance in the sensor changes as temperature changes, changing the temperature sensor signal circuit voltage to the FCM. Based upon the resistance in the sensor, the FCM senses a specific voltage on the temperature sensor signal circuit. The FCM then translates the voltage into a temperature reading that it sent over the Controller Area Network (CAN) data bus to other modules utilizing temperature information.