34 52 516 Removing and installing/replacing DSC control unit (Version 2)

IMPORTANT: Read and comply with notes on protection against electrostatic damage (ESD protection). See 61 35... NOTES ON ESD PROTECTION (ELECTRO STATIC DISCHARGE) .

Necessary preliminary tasks:

Remove hydraulic unit

IMPORTANT: Removing pump motor from valve block is not permitted!

Seal line connections with plugs (1) from control unit repair kit.

Clean control unit.

Fig 1: Identifying Control Unit Plugs

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Release screws (1).

IMPORTANT: Control unit must not come into contact with dirt or moisture.

Carefully pull off control unit (2) without tilting.

Installation:

Replace screws.

Tighten in diagonal sequence in increments of 1 Nm

Tightening torque. See 34 51 7AZ. .

Fig 2: Release Screws (1) And Pull Off Control Unit (2) Without Tilting

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IMPORTANT: Do not touch plug-in contacts (1) and sealing surface (2) with your fingers.
The seal for the electronic control unit deforms during fitting and thereby achieves its maximum sealing effect. The control unit must therefore not be removed again after installation or used a second time!
In the event of visible damage, the hydraulic control unit is can no longer be used!

Fig 3: Identifying Sealing Surface And Plug-In Contacts

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Clean sealing surface (2) of hydraulic control unit with fluff-free cloth (do not use hard or sharp objects).

Carry out programming/coding.

Mix-up check of brake lines.

Adjustment/calibration of steering angle sensor.