12 51 200 Replacing wiring harness section for injectors (N57 D30 O T 1)

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

Necessary preliminary tasks:

Switch off ignition.
Read out the fault memory of the DDE control unit.
Disconnect NEGATIVE BATTERY CABLE .
Remove ACOUSTIC COVER .
Remove INTAKE SILENCER HOUSING .
Remove ACOUSTIC COVER at rear.
Remove sound insulation on injectors.

Release screws (1).

Remove cable channel (2) from the cylinder head cover. To do this unlock and detach connectors (3) and (4).

Slide cable channel to one side.

Fig 1: Identifying Cable Channel, Connectors And Screws

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Release screws (1).

Tightening torque 12 90 2AZ .

Remove electronics box cover (2).

Fig 2: Identifying Electronics Box Cover And Screws

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Disconnect all plugs (1) from control unit.

Unclip rubber grommets on down holder.

Release wiring harness for injectors from electronics box (2).

Fig 3: Identifying Wiring Harness And Electronics Box

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Unlock all plugs on injectors and disconnect.

Release screws (1).

Feed out wiring harness for injectors (2) under pressure lines and engine wiring harness and remove.

Installation note:

To ensure watertightness, make sure the wiring harness rubber grommet for injectors is correctly inserted.

Fig 4: Identifying Injectors Wiring Harness And Screws

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NOTE: Check wiring harness installation arrangement.
Check plug connections for correct fit.
Reassemble the vehicle.
Read out the fault memory of the DDE control unit.
Check and rectify stored fault messages.
Delete fault memory.