BMW X3 Service & Repair Manual: Replacing wiring harness section for ignition and injectors (N20)

BMW X3 Service & Repair Manual / Electrical / Engine wiring loom / Replacing wiring harness section for ignition and injectors (N20)

IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DISCHARGE (ESD PROTECTION) .

Necessary preliminary tasks:

  • Read out the fault memory of the DME control unit.
  • Switch off ignition.
  • Remove ACOUSTIC COVER
  • Remove the PRESSURE CONVERTER for the exhaust turbocharger

Electrical

Overview of wiring harness section for ignition and injectors.

Unlock and remove connector (1) from control unit.

Electrical

Release wiring harness from clamps (1).

Electrical

NOTE: This procedure is applicable to all cylinders.

Unlock and disconnect connector (1) at injectors.

Slacken nut (1) and remove ground cable (3).

Electrical

NOTE: This procedure is applicable to all cylinders.

Release connector catch (1) at ignition coil (2) and pull off connector.

Electrical

Unlock retaining lug (1) in direction of arrow.

Pull cable channel (2) from cylinder head cover.

Pull out and remove wiring harness section for injectors and ignition coils.

Electrical

NOTE: Check stored fault messages.

Clear diagnostic fault entries from fault memory.

    Replacing wiring harness section for engine (N55)
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    Replacing wiring harness section for ignition and injectors (N55)
    IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DAMAGE (ESD PROTECTION) . Necessary preliminary work: Read out ...

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