13 61 501 Replacing control unit (DDE)

IMPORTANT: Read and comply with notes on ESD PROTECTION (ELECTRO STATIC DISCHARGE) .

Necessary preliminary work:

Switch off ignition.
Disconnect battery negative lead. See 61 20 900 DISCONNECTING AND CONNECTING BATTERY NEGATIVE LEAD .
Remove microfilter housing. See 64 31 081 REMOVING AND INSTALLING/REPLACING MICROFILTER HOUSING .

IMPORTANT: Follow instructions for REMOVING AND INSTALLING CONTROL UNITS

Replacement:

Carry out programming/encoding. See VEHICLE PROGRAMMING AND CODING .

IMPORTANT: It is absolutely essential to read out the fault memory with the BMW diagnosis system and to create a fault memory printout.

Switch off ignition.

Lever out expanding rivet.

Remove gasket (1).

Unfasten screws (2).

Feed out partition wall (3) and remove.

Fig 1: Identifying Partition Wall, Gasket And Screws

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Lever out expanding rivet.

Release locks in direction of arrow.

Feed out fresh-air duct (1) and remove.

Fig 2: Opening Fresh Air-Duct Locks

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Open clamps.

Release lock (1) in direction of arrow.

Remove cover (2).

Fig 3: Opening Air-Duct Cover Locks

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Release screws and remove retaining bracket (1).

Unlock upper part (2) of partition seal in direction of arrow and remove.

Release grommets (3) for wiring harnesses from lower section of partition seal and from electronics box.

Installation note:

Make sure grommets are correctly seated (watertightness).

Fig 4: Removing Partition Seal Upper Portion

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M57T2 only:

Unlock connectors (1) using slide in direction of arrow and remove.

Remove control unit (2).

Installation note:

Replacement:

Note device identification number and encoding.

Fig 5: Unlocking Connectors

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N57 only:

Unlock and detach all plug connections on the DDE control unit (1).

Unlock DDE control unit (1) and remove upwards.

Installation note:

Replacement:

Note device identification number and encoding.

Fig 6: Identifying DDE Control Unit

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NOTE: Check stored fault messages.

Delete fault memory.

Reassemble the vehicle.