Electronic Brake Control Module: Service and Repair

34 52 121 Removing and installing/renewing ICM control unit





Important!
Read and comply with notes on protection against electrostatic damage (ESD protection).





Warning!
The sensor system for triggering the airbag is installed in the ICM control unit!
The battery must be disconnected before removing the ICM control unit (ICM control unit de-energized)!
There is a risk of the airbag being triggered inadvertently if this requirement is disregarded!





Necessary preliminary work:
^ Disconnect battery earth lead.
^ Remove centre console assy.





Make service opening (2) in carpet.

Carefully cut carpet along pre-punched line (1).

Fold back service opening (2) in direction of arrow.





Warning!
Make sure that the negative battery lead is disconnected!
There is a risk of the airbag being triggered inadvertently!

Undo nuts (1) and raise ICM control unit (2).

Disconnect plug connection and remove ICM control unit (2).

Installation note:
Replace self-locking nuts.

Tightening torque 34 51 2AZ.

Important!
Do not trap any electrical leads when installing ICM control unit!





After removing and installing ICM control unit:
After completing repairs, use BMW Diagnosis and Information System to
^ carry out adjustment/start-up of ICM control unit

Replacement:
After completing repairs, use BMW Diagnosis and Information System to
- carry out programming/encoding
- Carry out ride-height calibration
- Carry out adjustment/start-up of ICM control unit