Component Location: TCU
WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
- TCU is an abbreviation of Telematics Communication Unit.
- It is installed under the center console, underneath the shifter.
- A radio communication terminal and SIM card are built into the unit and data is sent and received in SMS *1
, DTMF tone signal and packet communication *2
with the INFINITI CONNECTION ®
Data Center through the TEL antenna.NOTE: *1: SMS stands for Short Message Service. It is also referred to as Text Messaging, Short Mail, etc. It is the service that performs text based message communication.
*2: Packet communication means a communication method that data are broken down into smaller chunks for communication. The split data is called a packet and this method improves the efficiency of the communication circuit.
- It is connected to the display control unit with the USB harness for sound signal input/output and USB communication.
- VIN information necessary for the Telematics service is memorized.
- It is connected to the air bag diagnosis sensor unit via CAN communication. TCU performs an emergency report when the air bag is inflated.
- Audio signals received during SOS/INFINITI CONNECTION Response Specialist calls are transmitted from TCU to each speaker via the display control unit, AV control unit and Bose speaker amp.
- During communication with INFINITI CONNECTION Data Center, the TCU prohibits use of Bluetooth ® hands-free phone.