Module, Convergence Telematics: Operation: Operation

WARNING: This page is about a different car, the 2015 Fiat 500. However, it is still accessible from the selected car via links, so may be relevant.

The Convergence Telematics Module (CTM) is used only in vehicles equipped with the optional Bluetooth™ Hands Free Phone System (also known as the Blue&Me™ Bluetooth™ phone system). The CTM contains the microcontroller, logic and memory circuits of the Bluetooth™ Hands Free Phone System. The CTM uses On-Board Diagnostics (OBD) and can communicate with other electronic modules in the vehicle as well as with the diagnostic scan tool using the Controller Area Network (CAN) data bus. This method of communication is also used for Hands Free Phone System diagnosis and testing through the 16-way data link connector located on the driver side lower edge of the instrument panel and is used by the CTM to acquire vehicle configuration data.

The CTM brings together (converges) several technologies in the vehicle. The CTM uses Bluetooth™ technology to provide wireless connectivity between a paired compatible personal cellular telephone and other on board vehicle systems. The CTM also uses sophisticated Voice Recognition (VR) software to recognize and respond appropriately to certain verbal commands, which allows hands free control of a number of optional vehicle systems and features. In addition to English, the VR software includes Spanish and French language capability. Incoming call voices are broadcast through the front audio system speakers of the vehicle, automatically overriding any other audio signals on the front speakers while the hands free phone feature is in use.

The CTM circuitry receives battery current through a fused ignition output (unlock - run - start) circuit and fuse through the Body Control Module (BCM). The CTM also has a path to ground at all times received through a ground circuit and take out of the instrument panel wire harness that is secured to the body sheet metal. These connections allow the CTM to operate whenever the status of the ignition switch is Unlock, Run or Start. Other inputs to the CTM include:

Cellular Telephone
- Using the Bluetooth® wireless standard, the Bluetooth® transceiver within the CTM can pair and prioritize up to 5 combined Bluetooth® capable personal cellular telephones, each of which is given a spoken identification by the user during the setup process. The phone connectivity enables wireless calling, text messaging and cellular phone contact list synchronization features. The CTM will communicate with a paired device that is anywhere within the vehicle. However, placing metal between the CTM and the device may result in unwanted shielding of the signals.
Steering Wheel Switch Pod
- Vehicles equipped with the Bluetooth™ Hands Free Phone System have a unique switch pod with additional push buttons on the spokes of the steering wheel. One push button is labeled with a Voice Recognition icon and initiates the Voice Command feature. The second button is identified by a telephone hand set icon and initiates the Hands Free Phone feature. The CTM monitors hard wired resistor multiplexed inputs indicating the status of each of these switches.
Universal Serial Bus
- For music stored on a Universal Serial Bus (USB) flash drive or other media device, the CTM receives input over a dedicated auxiliary USB connection and relays the information to the Radio Receiver Module (RRM) (also known as the radio or the head unit) for playback through the audio system of the vehicle.
Verbal Commands
- A wired microphone integral to the courtesy lamp provides verbal commands from the vehicle operator to both the CTM and the RRM, which enables the control of several vehicle systems and features using the Voice Command feature through the Voice Recognition (VR) software.

Note:

The optional navigation system shares the VR software within the CTM and the microphone inputs to the CTM.

Outputs of the CTM include:

Analog Audio Outputs
- The CTM has both left and right channel analog audio output circuits. The CTM provides Bluetooth™ Hands Free call audio and Hands Free voice prompt audio to the RRM through these circuits.
Digital Electronic Messages
- The VR software within the CTM is programmed to convert Voice Command verbal inputs into the appropriate electronic request message, which is then transmitted by the CTM over the CAN data bus. When the Electronic Control Unit (ECU) that controls the requested feature receives the electronic request message over the CAN data bus, it will invoke the requested action.
Wireless Messages
- The VR software within the CTM is also programmed to convert Voice Command verbal inputs into the appropriate Bluetooth® wireless request message, which is then transmitted by the Bluetooth® transceiver to the appropriate paired wireless device to invoke the requested action.

The BCM stores and compares vehicle configuration data with the CTM as well as with other Electronic Control Units (ECU) in the vehicle. This process is referred to as PRogramming Of Configuration of Systems Integrated (PROCSI) (also known as PROXI). If a configuration mismatch is detected, the BCM sets a Diagnostic Trouble Code (DTC). A configuration mismatch will require the performance of a Restore BCM PROXI Configuration routine, or a PROXI Configuration Alignment routine using a diagnostic scan tool.

The CTM uses On-Board Diagnostics (OBD) to monitor all of the systems and circuits it controls, then sets active and stored Diagnostic Trouble Codes (DTC) for any monitored system faults it detects. The CTM will also send electronic message requests to the Instrument Cluster (IC) (also known as the Instrument Panel Cluster/IPC) for the display of certain textual warning messages related to some detected system conditions or faults.

The hard wired circuits of the CTM may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate SYSTEM WIRING DIAGRAMS article . 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 CTM or the electronic controls and communication between modules and other devices that provide some features of the Uconnect™ system. The most reliable, efficient and accurate means to diagnose the CTM or the electronic controls and communication related to Uconnect™ system operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.