13 61 501 Replacing control unit (DDE) (N47 D20 O 1 with SCR)

IMPORTANT: Read and comply with NOTES on protection against electrostatic damage (ESD protection).

Necessary preliminary tasks:

Replacement:

Carry out programming/encoding.
If no data can be read out from the previous control unit, carry out injection quantity compensation (description at end of instructions).

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

Switch off ignition.

Partially loosen the rear gasket (1) for the engine compartment lid until the screw is accessible from the cover of the electronics box.

Release all screws along line (2).

Remove the electronics box lid (3).

Fig 1: Identifying Rear Gasket, Line And Electronics Box Lid

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Unfasten both connectors (1) in direction of arrow. Unplug connectors (1) from control unit and place to one side.

Fig 2: Disconnecting Connectors

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Release retainers (1) on control unit.

Pull out control unit (2) towards top.

Fig 3: Pulling Control Unit

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Injection quantity compensation:

If the DDE control unit has been replaced, it will also be necessary to carry out adjustment of the injectors!

The adjustment value (1) (7-position letter code/number code) is engraved on each injector (2).

Enter the numbers/letters according to the installation location (cylinder) of the injectors.

Select "DDE".
Select "Adjustment, injection quantity compensation"
Select "Test plan"

Fig 4: Identifying Number Code On Injector
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The adjustment must be entered for each injector.

It is necessary to adjust the injectors to ensure their full functional capability.

NOTE: Check stored fault messages.
Clear diagnostic fault entries from fault memory.