Odometer Switch Pod Explanation

ODOMETER SWITCH POD DESCRIPTION
The odometer switch pod is located in the left spoke of the steering wheel spoke bezel. This switch has up to four push buttons. Two of the push buttons (7 and 8) are used on all vehicles not equipped with the Electronic Vehicle Information Center (EVIC). Two additional push buttons (1 and 2) are found on vehicles equipped with the optional Uconnect™ Hands-Free Communication System. The only visible components of the switch pod are the switch push buttons and a decorative bezel around the push buttons, which stands slightly proud of the steering wheel spoke bezel. The remainder of the switch pod including its mounting provisions and its electrical connection are concealed beneath the spoke bezel.

The switch pod housing and push buttons are constructed of molded plastic. Each of the push buttons has white International Control and Display Symbol graphics or text applied to it, which clearly identify the function of each push button. The switch pod is secured through three integral mounting tabs to mounting bosses on the back of the spoke bezel by three screws. A connector receptacle integral to the
inboard end of the switch pod housing connects the odometer switch pod to the vehicle electrical system through a dedicated take out and connector of the steering wheel wire harness.

The odometer switch pod cannot be adjusted or repaired. If any function of the switch is ineffective or damaged, the entire switch pod unit must be replaced.

ODOMETER SWITCH POD OPERATION
The odometer 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 odometer 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 odometer switch pod (also known as the odometer switch) is used only for vehicles not equipped with the Electronic Vehicle Information Center (EVIC) system and 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.

For vehicles equipped with the Uconnect™ Hands-Free Communication System, the odometer switch pod contains two additional switch push buttons whose functions are:
VR (Voice Recognition) - This switch button activates the Uconnect™ Voice Command system.
Phone - This switch push button activates the Uconnect™ 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 odometer 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 odometer 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 odometer system. The most reliable, efficient, and accurate means to diagnose the odometer switch pod, the LIN slave or master nodes, the EMIC or the electronic controls and communication related to odometer system operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.

ODOMETER SWITCH POD REMOVAL
The odometer switch pod is serviced in exactly the same manner as the Electronic Vehicle Information
Center (EVIC) control switch. Refer to SWITCH, EVIC CONTROL, REMOVAL

ODOMETER SWITCH POD INSTALLATION
The odometer switch pod is serviced in exactly the same manner as the Electronic Vehicle Information
Center (EVIC) control switch. Refer to SWITCH, EVIC CONTROL, INSTALLATION