Telematics Control Unit (TCU): Difference between revisions
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* [https://mynissanleaf.com/threads/reverse-engineering-telematics-unit.36889/ Reverse engineering Telematics Unit - My Nissan Leaf Forum] | * [https://mynissanleaf.com/threads/reverse-engineering-telematics-unit.36889/ Reverse engineering Telematics Unit - My Nissan Leaf Forum] | ||
* https://github.com/developerfromjokela/nissan-leaf-tcu | |||
* [https://www.youtube.com/watch?v=5QBOmr_ZyLo&ab_channel=DEFCONConference DEF CON 25 - Mickey Shkatov, Jesse Michael, Oleksandr Bazhaniuk - Driving down the rabbit hole - YouTube] | * [https://www.youtube.com/watch?v=5QBOmr_ZyLo&ab_channel=DEFCONConference DEF CON 25 - Mickey Shkatov, Jesse Michael, Oleksandr Bazhaniuk - Driving down the rabbit hole - YouTube] | ||
Revision as of 04:34, 5 April 2025
Introduction
The Telematics Control Unit (TCU) provides connectivity to the Nissan Leaf. It is a 2G, 3G, 4G or 5G modem, depending on the year and region, with additional functionality.
Location and access
Left-hand drive
The TCU is located behind the glove box. Access is achieved by removing the glove box.
Right-hand drive
The TCU is located above the pedals.
Variants
2G
3G
4G
These are found on some 2nd-generation Nissan Leafs. It is based on a Sierra Wireless AirPrime AR7554 modem module and likely has a second chip for CAN communication at least.
-
External view -
Circuit board side A -
Circuit board side B
5G
Connections
| Connector Number | Physical Description | Purpose |
|---|---|---|
| M67 | TH40FB-NH (40-pin connector) | Power, Microphone, CANBUS |
| M173 | USCAR30-MD-M (USB) | USB connection to AV Control Unit |
| M174 | FAKRA CODE H 4003 (Pink) | GSM antenna |
| M175 | 3FA1ANCSJ-C02W0 (Blue) | GPS antenna |