Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Cellular Telephone Operating Electronics Control Module






Telephone System

Cellular Telephone Operating Electronics Control Module

Special tools, testers and auxiliary items required

Fiber optic plier repair set (VAS 6223)

Protective cap for cable connector (VAS 6223/9)

If control module is replaced, select "Replacement" function for appropriate control module in "Guided Fault-Finding" routine. Use the Vehicle Diagnosis, Testing and Information System (VAS 5051) to do so.

- Switch off all electrical consumers.

- Remove the key.

Removing

- Remove the left front seat.

- Fold back the floor mat.

- Disengage cover of electronics box and open the box - arrows -.





The cellular telephone operating electronics control module (J412) is clipped to the electronics box.

- Pry the cellular telephone operating electronics control module - 1 - out of electronics box - 2 - in - direction of arrow -.





- Disconnect the Bluetooth antenna (R152) from the cellular telephone operating electronics control module - 1 -, if equipped.

- Disconnect the connectors from the cellular telephone operating electronics control module - 1 -.

- Attach the (VAS 6223/9) - 1 - onto the MOST-Bus connector - 2 -.





Installing

- Install in reverse order.