Electronic Vehicle Information Center Switch - Operation

OPERATION

The Electronic Vehicle Information Center (EVIC) control switch pod is a resistor multiplexed unit that receives source current from and provides hard wired inputs to the Local Interface Network (LIN) slave node integral to the speed control switch pod in the right spoke of the steering wheel spoke bezel. The LIN slave node communicates the switch states of the EVIC control switch pod, the remote radio switches and the horn switch over the LIN data bus to the ElectroMechanical Instrument Cluster (EMIC) (also known as the Cab Compartment Node/CCN), which is the LIN master node.

The EVIC control switch pod (also known as the odometer switch) for vehicles not equipped with the EVIC system contains two switch push buttons whose functions are:

- Reset - This switch button allows the operator to reset the trip odometer (A or B) currently displayed in the odometer display unit of the instrument cluster.
- Step - This switch button allows the operator to step through the total odometer, trip odometer A and trip odometer B display options of the odometer display of the instrument cluster.

The EVIC control switch pod for vehicles equipped with the EVIC system contains four switch push buttons whose functions are:

- Menu - This switch button allows the operator to view the available EVIC menu items, including Compass/Temperature, Trip Computer, Navigation (if equipped), Personal Settings (also known as customer programmable features) or System Status.
- Select / Reset - This switch button allows the operator to select or reset the feature or function currently displayed in the EVIC.
- Compass - This switch button provides instant access to the compass/temperature EVIC display mode from any other mode.
- Step / Scroll Down - This switch button allows the operator to step or scroll down through options or features of the Trip Computer, Personal Settings or System Status functions.

For vehicles equipped with the Uconnect(TM) Hands-Free Communication System, the EVIC control switch pod contains two additional switch push buttons whose functions are:

- VR (Voice Recognition) - This switch button activates the Uconnect(TM) Voice Command system.
- Phone - This switch push button activates the Uconnect(TM) Hands-Free Phone system.

The EMIC LIN master node provides a clean ground and fused B(+) current for all of the switches and sensors on the rotating steering wheel through the LIN slave node circuitry of the speed control switch pod as well as for the Light Emitting Diode (LED) back lighting of both the speed control and the EVIC switch pods. The EMIC continually monitors the LIN bus data and will store a Signal Not Available (SNA) code for any LIN bus input errors. The EMIC also communicates with other electronic modules over the Controller Area Network (CAN) data bus. Therefore, any EMIC DTC information can be retrieved using a diagnostic scan tool connected to the Data Link Connector (DLC).

The analog resistor multiplexed circuits of the EVIC control switch pod as well as the hard wired circuits between the switch pod and the LIN slave node within the speed control switch pod may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds.

However, conventional diagnostic methods will not prove conclusive in the diagnosis of the LIN slave or master nodes, the EMIC or the electronic controls and communication between modules and other devices that provide some features of the EVIC system. The most reliable, efficient, and accurate means to diagnose the EVIC control switch pod, the LIN slave or master nodes, the EMIC or the electronic controls and communication related to EVIC system operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.