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Description And Operation: Notes

DESCRIPTION 

GC0202723Courtesy of CHRYSLER GROUP, LLC

The Global Telematics Box Module (TBM2) system consists of the following components:

COMPONENT INDEX

1. Refer to OCCUPANT RESTRAINT CONTROLLER (ORC) .
2. Refer to ECALL SPEAKER .
3. Refer to GLOBAL TELEMATICS BOX MODULE (TBM2) .
4. Refer to RADIO .
5. Refer to SOS CALL BUTTON .
6. Refer to MICROPHONES .
7. Refer to COMBINATION ANTENNA .
8. Refer to LONG TERM EVOLUTION 2 (LTE2) ANTENNA .

A telematics connectivity module, called the TBM2, is located behind the Integrated Center Stack (ICS) Module in the instrument panel center stack. It is part of the emergency crash notification system, which is included in the vehicle to automatically initiate an audio emergency call (eCall) to a Public Safety Answering Point (PSAP), either as an option or as standard equipment in markets that require it. An eCall can be manually triggered by the vehicle occupant if so desired. When triggered, whether automatically or manually, the vehicle eCall system will also attempt to send a Minimum Set of Data (MSD) to a public Mobile Network Operator (MNO) concerning the vehicle location and Vehicle Identification Number (VIN).

In addition, other features are included in the telematics connectivity system to enhance the customer experience through interaction with the vehicle and is dependent on the market for which the vehicle is manufactured. Several applications are available, some required by government regulations, and communicate with the Global Services Delivery Platform (GSDP) in that market.

OPERATION 

NOTE:

The Security Gateway Module (SGW) is the Controller Area Network (CAN) gateway between the radio, telematics modules, Data Link Connector (DLC) and the other vehicle CAN modules. An SGW failure could prevent the radio from powering up, telematics module from communicating or a scan tool from communicating with the vehicle. For additional information on the SGW. Refer to MODULE, SECURITY GATEWAY (SGW), DESCRIPTION AND OPERATION .

The TBM2 system will detect an eCall trigger, whether automatic through a crash severe enough or manual at a vehicle occupant's request by pressing the SOS button. Once triggered, the system will attempt to send an MSD to any public system operated by an MNO and also attempt to establish a voice connection between the vehicle and the PSAP. When connected to the MNO, the vehicle will transfer the vehicle location and VIN.

The TBM2 system is triggered automatically when the ORC sends a signal using the CAN - Chassis (CAN-C) data bus or the Output Digital Serial line. The Output Digital Serial line is only used in markets that require the TBM2 system. The severity of the crash will determine if an eCall is sent or not. This will include direction of the impact, whether frontal, side, rear or rollover.

The TBM2 system can be manually triggered using the SOS button by the vehicle driver or a passenger. The TBM2 will actuate the system in the same manner as if it had been triggered automatically by the ORC. When eCall is in operation, the radio audio will be muted and eCall audio will be heard through the eCall speaker.

In the event that the vehicle battery connection is compromised, a backup battery is mounted within the TBM2 to ensure the integrity of the system and a continuation of an eCall if the vehicle battery becomes disconnected while a call is in progress. If the backup battery becomes discharged, a message will be indicated in the Instrument Panel Cluster (IPC) and a diagnostic code set in the TBM2.

The TBM2 microcontroller continuously monitors all of the TBM2 system electrical circuits to determine the system readiness. If the TBM2 detects a monitored system fault, it sets an active and stored Diagnostic Trouble Code (DTC) and sends electronic messages to the IPC and BCM over the CAN data bus to turn ON the TBM2 indicator. An active fault only remains for the duration of the fault, or in some cases for the duration of the current ignition cycle, while a stored fault causes a DTC to be stored in memory by the TBM2.

The SGW is in the audio and telematics CAN systems to provide security against certain types of attacks and threats from the scan tool, telematics and entertainment buses, which can put the rest of the vehicle's buses at risk of intrusion. The SGW lies electrically between the vehicle on one side, and the DLC, telematics and entertainment systems on the other side. The main function is to gate messages from one bus to another. The SGW monitors the B(+) Feed, switched ignition feed, CAN circuits, software and hardware for any concerns.

The hardwired inputs and outputs for the TBM2 may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. However, conventional diagnostic methods will not prove conclusive in the diagnosis of the TBM2 or the electronic controls and communication between other modules and devices that provide some features of the TBM2 system. The most reliable, efficient and accurate means to diagnose the TBM2 or the electronic controls and communication related to TBM2 system operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.

Modes of Operation 

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