12 51 001 Replacing Wiring Harness Section For Engine (S85)
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2010 BMW M6, 2010 BMW M5, 2009 BMW M6, 2009 BMW M5, and 2008 BMW M6. However, it is still accessible from the selected car via links, so may be relevant.
Necessary preliminary tasks:
- Read out fault memory of control unit of Digital Motor Electronics (DME).
- Check stored fault messages.
- Switch off ignition.
- Disconnect battery.
- Remove intake air manifold. See 11 61 050 REMOVING AND INSTALLING AIR INTAKE MANIFOLD (S85) .
- Remove cover for ionic current control unit on left and right.
- Remove ignition coil cover on left and right.
- Unlock all plug connections in electronics box and disconnect.
Release bolt on cable duct (1).
Release bolt on cable duct (1).
WORK STEP CHART
| Work step | Note: |
|---|---|
| Release battery positive lead on cable duct at front and rear | Tightening torque. See ENGINE ELECTRICAL SYSTEM - TIGHTENING TORQUES . |
| Unlock plug on ignition coils on left and right and disconnect | |
| Unlock plug on ionic current control unit on left and right and disconnect | |
| Release grounding cable for ionic current control unit on left and right | |
| Unlock plug on pulse generator of left and right inlet camshafts and disconnect | |
| Unlock plug on pulse generator of left and right exhaust camshafts and disconnect | |
| Unlock plug on wiring harness section for alternator on cable duct and disconnect | |
| Unlock plug on wiring harness section for A/C compressor on cable duct and disconnect | |
| Unlock plug on fuel injectors on left and right and disconnect | |
| Unlock plug on electric switchover valve and disconnect | |
| Unlock plug on Hall sensor on left and disconnect | |
| Unlock plug on servomotor on left and disconnect | |
| Unlock plug on coolant temperature sensor and disconnect | |
| Unlock plug on idle speed actuator on left and right and disconnect | |
| Unlock plug on tank venting valve on left and right and disconnect | |
| Unlock control line on starter motor and disconnect | |
| Unlock plug on Hall sensor on right and disconnect | |
| Unlock plug on differential pressure sensor and disconnect. | |
| Unlock plug of crankshaft pulse generator and disconnect. | |
| Unlock plug on control sensor on left and right and disconnect | |
| Unlock plug on monitor sensor on left and right and disconnect | |
| Unlock plug on temperature sensor on left and right and disconnect |
Release bracket on underside of transmission.
Lay cable, plugs of oxygen sensors, temperature sensor and crankshaft sensor over bracket of right catalytic converter.
Feed out cable towards top.
Remove wiring harness.
Installation:
Pay attention to cable routing/mounting points.
Now clear the fault memory.