BMW X3 Service & Repair Manual: 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

Overview of wiring harness section for ignition and injectors.

Unlock and remove connector (1) from control unit.

Release wiring harness from clamps (1).

NOTE: This procedure is applicable to all cylinders.

Unlock and disconnect connector (1) at injectors.

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

NOTE: This procedure is applicable to all cylinders.

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

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.

NOTE: Check stored fault messages.

Clear diagnostic fault entries from fault memory.