12 14 523 Replacing pulse generator on inlet camshaft (M52TU / M54 / M56)

Necessary preliminary tasks:

Check stored fault messages.
Switch off ignition.
Remove suction filter housing. See 13 71 000 REMOVE AND INSTALLING INTAKE FILTER HOUSING (M52TU, M54)

NOTE: Arrow shows installation position of pulse generator.

Remove solenoid valve (1) of VANOS adjustment unit for inlet camshaft.

Installation:

Replace sealing ring.

Fig 1: Removing Solenoid Valve Of VANOS Adjustment Unit

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Disconnect plug connection (1) on cable duct (2).

Fig 2: Disconnecting Plug Connection On Cable Duct

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Release screw (1) on pulse generator (2).

Remove pulse generator (2) from cylinder head.

NOTE: To facilitate installation of pulse generator lead:
Secure an approx. 50 cm long auxiliary lead to plug connection of pulse generator.

Feed out end of pulse generator lead but only to such an extent that the auxiliary lead remains in the original routing in the intake system.

Remove pulse generator with lead.

Disconnect auxiliary lead from faulty pulse generator. Secure plug connection of new pulse generator to auxiliary lead.

Using auxiliary lead, feed new lead of pulse generator through to cable duct at bottom.

Installation:

Check sealing ring for possible damage, replace if necessary.

Fig 3: Removing Pulse Generator From Cylinder Head

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NOTE: Read out fault memory of DME control unit.
Now clear the fault memory.