На экране навигации выскакивает ошибка: "connection to RDS-TMC tuner failed or cannot be established". Сопровождается это ошибками:

01300 - Блок управления системой навигации с CD-ROM приводом-J401
49-00 - нет связи
01304 - Магнитола с Радио
49-00 - нет связи

В эльзе нашел такой вот документ:

On-screen fault messages
In the event of a system fault, the fault is stored in fault memory and/or fault message appears on display of operating electronics control unit for navigation -J402-.
The following fault messages can be displayed:
Indicated on display of navigation system II-D:

RDS TMC tuner:
Problem with RDS TMC
tuner link or link could
not be established

This fault message occurs in the following situations:
t No CAN communication or CAN communication problems between operating electronics control unit for navigation -J402- and navigation interface -R94- (open circuit in wiring or wiring not connected).
t Navigation interface -R94- defective.
If this fault occurs, RDS TMC traffic information cannot be received and the “traffic jam function” menu cannot be called up.

Собственно вопрос: Где вот эти J402 и R94?