Message Center - Service Information: Overview Dodge Durango III

Scheme 186

The Electronic Vehicle Information Center (EVIC) features a driver-interactive display (21). The display is located in the middle of the instrument cluster between the speedometer and tachometer. This system conveniently allows the driver to select a variety of useful information by pressing the switches mounted on the steering wheel. The EVIC displays information related to the following

1. Audio mode display
2. Compass display
3. Fuel saver indicator, Economizer (ECO) display
4. Navigation system screens - If Equipped
5. Outside temperature display
6. Park Assist System - If Equipped
7. Personal Settings (customer programmable features)
8. System Status
9. Tire Pressure Monitor System - If Equipped
10. Trip computer functions
11. U-Connect™ hands-free communication system displays - If Equipped
12. Vehicle information warning message displays

The EVIC system is comprised of several different components. Those components are

1. Instrument Cluster
2. Steering Wheel Switches
3. Ambient Temperature Sensor
4. Electronic Overhead Module
5. Remote Compass Module
6. Controller Area Network (CAN) Data Bus
7. Local Interface Network (LIN) Data Bus

The EVIC display is part of the Instrument Cluster assembly and is not serviced as a separate component. If the display is inoperative the complete Instrument Cluster assembly must be replaced. Refer to REMOVAL . If the EVIC function buttons are inoperative and require replacement, for the appropriate procedure. Refer to SWITCH, EVIC CONTROL, REMOVAL . If the Remote Compass Module (RCM) (Electronic Overhead Module) is inoperative and requires replacement, for the appropriate procedure. Refer to MODULE, COMPASS, REMOVAL .

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 187

The EVIC function buttons are used to operate the different functions of the EVIC system. Pressing and releasing the MENU buttons (5 & 6) allows the driver to scroll though and select the Compass/Temperature, Trip Computer, Personal Settings or System Status functions. The STEP button (3) allows the selection of setting or resetting of the function currently displayed at that time. Pressing and releasing the BACK button (4) will cause the EVIC to return to the main menu.

The Compass Temperature Display system 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 display will return to the last function being displayed before the ignition was turned to the OFF position. Pressing and holding the instrument cluster pushbutton allows setting variance zones and manual calibration of the compass.

The Compass Temperature Display system is comprised of several different components that communicate over the Controller Area Network (CAN) and Local Interface Network (LIN) Data Bus circuits. If the system is inoperative a scan tool and the appropriate diagnostic information must be used to diagnose the system and related data buses.

The ambient temperature sensor is a variable resistor that operates on a five-volt reference signal sent by the Totally Integrated Power Module (TIPM). The resistance in the sensor changes as temperature changes, changing the temperature sensor signal circuit voltage to the TIPM. Based upon the resistance in the sensor, the TIPM senses a specific voltage on the temperature sensor signal circuit. The TIPM then translates the voltage into a temperature reading that it sent over the Controller Area Network (CAN) data bus circuit to other modules utilizing temperature information.

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, the paddle shifter switches (if equipped), the horn switch and the heated steering wheel sensor (if equipped) over the LIN data bus to the Steering Control Module (SCM), 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

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

The SCM 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 SCM continually monitors the LIN bus data and will store a Signal Not Available (SNA) code for any LIN bus input errors. The SCM also communicates with other electronic modules over the Controller Area Network (CAN) data bus. Therefore, any SCM DTC information can be retrieved using a diagnostic scan tool connected to the Data Link Connector (DLC).

The SCM 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 SCM continually monitors the LIN bus data and will store a Signal Not Available (SNA) code for any LIN bus input errors. The SCM also communicates with other electronic modules over the Controller Area Network (CAN) data bus. Therefore, any SCM 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 SCM 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 SCM 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.