Global Telematics Box Module (TBM2)
| Refer to COMPONENT INDEX . |
Inputs
- Global positioning information
- Emergency (SOS) button pressure status
- ORC module data
- Ignition status from the BCM
- Microphone data
- Vehicle configuration
- Supplemental Restraint System (SRS) indicator status from the IPC
- Daytime mode from the BCM
- Language from the IPC
- Crash event data
Outputs
- Phone communication to the eCall speaker
- Global positioning information to the cell phone module
- Vehicle data to the BCM
- eCall status to the BCM
- Audio mute
- Illumination of the SOS button Light Emitting Diode (LED)
- Power and ground to the SOS button
The TBM2 (2) is the solid state control module in the eCall system and is located on the left side of the steering column support.
The TBM2 (2) is connected to the instrument panel wiring harness using one 32-pin wiring harness connector (5) and four antenna connectors (3). The Universal Serial Bus (USB) (4) is connected between the radio and TBM2 for connectivity to the TBM2 internal WiFi antenna and diagnostics. One of the antenna connectors is connected to the Long Term Evolution 2 (LTE2) antenna for communication on the 4G cellular network, if available in the market. Two of the antenna connectors are connected for Global Positioning System (GPS) signals, one input from the combination antenna and one output to the radio. The fourth antenna connector is connected to the combination antenna for LTE1 signal use. Antenna connections vary by market.
The module is mounted to the instrument panel structural support using four bolts at each of the four mounting bosses (1).
The TBM2 has an internal cell phone antenna which is used in the event of the vehicle's cell phone module not operating or not operating properly.
The TBM2 incorporates a backup battery (2) with a life expectancy of 5-7 years that will allow the eCall system to continue to work in case of vehicle power interruption. The battery will allow call and data transfer for at least 15 minutes with callback capability for at least one hour after a vehicle emergency.