12 51 210 Replacing wiring harness section for ignition and injectors (N20 hybrid drive)

WARNING: High-voltage system - danger to life
Compliance with the following points is mandatory before beginning work:

Observe SAFETY INFORMATION for working with electric vehicles.

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

Necessary preliminary tasks:

Remove ACOUSTIC COVER

Removal:

Overview of wiring harness section for ignition and injectors:

Fig 1: Overview Of Wiring Harness Section For Ignition And Injectors

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Thread sound insulation (1) out of ball head (2) and place to side.

Fig 2: Identifying Sound Insulation And Ball Head

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Feed out acoustic foam (1) towards the top and remove.

Fig 3: Identifying Acoustic Foam

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NOTE: This procedure is applicable to all cylinders.
Unlock connector fastener (1) on the ignition coil in the direction of the arrow.
Remove connector (2) in the direction of the arrow.

Fig 4: Disconnecting Ignition Coil Connector

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NOTE: This procedure is applicable to all cylinders.

Unlock and loosen connector along the arrows on the injector.

Loosen nut (1) and remove ground cable.

Fig 5: Identifying Ground Cable Nut

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Unlock and loosen connector (1) from the control unit in the direction of the arrow.

Fig 6: Removing Control Unit Connector

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Release wiring harness from clamps (1).

Fig 7: Identifying Wiring Harness Clamps

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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.

Fig 8: Unlocking Retaining Lug

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Installation:

Insert and install wiring harness section for injectors and ignition coils.

Insert and install cable channel (2) on the cylinder head cover.

Retaining lugs (1) must audibly engage.

Fig 9: Identifying Cable Channel And Retaining Lugs

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NOTE: This procedure is applicable to all cylinders.

Connect and lock connector along the arrows on the injectors.

Connectors must snap audibly into place.

Insert ground cable and tighten nut (1).

Tightening torque 12 52 2AZ .

Fig 10: Identifying Ground Cable Nut

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NOTE: This procedure is applicable to all cylinders.
Install connector (2) in the direction of the arrow.
Lock connector fastener (1) on the ignition coil in the direction of the arrow.
Connector fastener (1) needs to engage audibly.

Fig 11: Fitting Connector Onto Ignition Coil

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Connect and lock wiring harness to the clamps (1).

Fig 12: Identifying Wiring Harness Clamps

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Connect and lock connector (1) from the control unit in the direction of the arrow.

Connector (1) must engage audibly.

Fig 13: Connecting And Locking Control Unit Connector

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Feed in and install the acoustic foam (1).

Fig 14: Identifying Acoustic Foam

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Thread sound insulation (1) into ball head (2) and install.

Fig 15: Identifying Sound Insulation And Ball Head

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Required follow-up work:

Install ACOUSTIC COVER