Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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
| 1 - Mounting Bosses |
| 2 - TBM2 |
| 3 - Antenna Connectors |
| 4 - USB Connector |
| 5 - Harness Connector |
The TBM2 is the solid state control module in the Global Telematics system, if equipped, for network connectivity and is located above the left side of the glovebox and to the left of the Passenger AirBag (PAB), secured to a bracket that is attached to the instrument panel carrier.
The TBM2 is connected to the instrument panel wiring harness using one 32-pin wiring harness connector and four antenna connectors. The Universal Serial Bus (USB) is connected between the radio and TBM2 for connectivity to the TBM2 internal Wi-Fi 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 regulation.
The module is mounted to the instrument panel carrier structural support using fasteners at the mounting bosses.
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.
| 1 - TBM2 |
| 2 - Backup Battery |
| 3 - Backup Battery Cover |
The TBM2 incorporates a backup battery with a life expectancy of 5-7 years that will allow the network connectivity 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.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.