12 51 001 Replacing wiring harness section for engine (S62)

WARNING: This page is about a different car, the 2003 BMW Z8, 2002 BMW Z8, 2001 BMW Z8, and 2000 BMW Z8. However, it is still accessible from the selected car via links, so may be relevant.

Interrogate fault memory of DME control unit.

Switch off ignition.

Follow instructions for disconnecting and connecting battery. Refer to 12 00 ... Instructions for disconnecting and connecting battery .

Disconnect and cover battery negative lead.

Disconnect plug connections on DME control unit. refer to 12 14 550 Replacing control unit (DME) (S62) .

Disconnect remaining plug connections of engine wiring harness in electronics box.

Remove left and right partition walls for equipment compartment. Refer to 51 71 080 REMOVING AND INSTALLING/REPLACING PARTITION WALL FOR EQUIPMENT COMPARTMENT ON LEFT and 51 71 080 REMOVING AND INSTALLING/REPLACING PARTITION WALL FOR EQUIPMENT COMPARTMENT ON RIGHT .

Disconnect intake air manifold. Refer to 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (S62) .

Disconnect plug connections (1).

Unclip cable (2) from cable guides.

Fig 1: Disconnecting Plug Connections

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Disconnect plug connections (1).

Unclip cable (2) from cable guide.

Fig 2: Locating Plug Connections & Cable

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Disconnect plug connection for throttle actuator (1), idle speed control valve (2) and electric changeover valve (3).

Fig 3: Disconnecting Plug Connection For Throttle Actuator

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Disconnect plug connection (1) for tank venting valve.

Fig 4: Disconnecting Plug Connection For Tank Venting Valve

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NOTE:

For a better overview, the following work steps are shown on an engine that has been removed.

Disconnect plug connection (1) for left and right pulse generators for exhaust camshaft.

Fig 5: Disconnecting Components

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Disconnect plug connection (2) for left and right pulse generators for inlet camshaft.

Disconnect plug connection (3) for knock sensor pair from cable duct (4) on left and right.

Slacken screws.

Feed plug (1) through holder (5).

Unhook both cable ducts (1) from mounts and raise approx. 2 cm.

Fig 6: Unhooking Cable Ducts

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Installation:

Check seating of rubber grommets on ignition coil cable.

Unclip both cable strips (2), tilt up and tie back (e.g. to engine hood).

Disconnect plug connection (1) for throttle potentiometer on left and right.

Fig 7: Disconnecting Plug Connection For Throttle Potentiometer

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Disconnect plug connections on ignition coils. Refer to 12 13 511 Replacing ignition coil (S62) .

Remove underbody protection at front and rear.

Mark left and right plug connections (1 and 2) to avoid mixing up plugs.

Fig 8: Locating Plug Connections & Cable Holders

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Unclip left and right plug connections (1 and 2) from holders and disconnect.

Unclip cables from cable holders (3).

NOTE: The exhaust temperature sensor is omitted from September 2000. For subsequent procedure, refer to Hotline Information HLI 114964000.

Disconnect plug connection (1).

Unclip cable (2) from cable holders (3).

Fig 9: Locating Plug Connection & Cable

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Disconnect plug from reversing light switch (1) and gear detection switch (2).

Fig 10: Disconnecting Plug From Reversing Light Switch

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Unclip cable (1) from fixtures (2) on cross-member.

Fig 11: Unclipping Cable From Fixtures On Cross-Member

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NOTE: For a better overview, this work step is shown without the exhaust system.

Unclip cable (1) from cable holder (2) on transmission housing.

Fig 12: Unclipping Cable From Cable Holder On Transmission Housing

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Disconnect plug connection (1) on pulse generator.

Fig 13: Disconnecting Plug Connection On Pulse Generator

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Disconnect plug connection (1) on starter motor.

Fig 14: Disconnecting Plug Connection On Starter Motor

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Unclip cable from cable guides (2).

NOTE: Interrogate fault memory of DME control module.
Check stored fault messages.
Rectify faults.
Then clear fault memory.