12 51 001 Replacing wiring harness section for engine (N62)
WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.
Necessary preliminary tasks:
- Switch off ignition
- Disconnect battery
- Remove acoustic cover
- Remove fan cowl
- Remove alternator
- Remove ignition coil cover on left and right
- Release cable duct from intake air manifold
- Remove transmission underbody protection
- Remove right exhaust manifold
- Remove heat shield from starter motor
ENGINE WIRING LOOM
| Work step Note: | |
|---|---|
| Unlock plug on monitor sensor on left and right and disconnect | |
| Unlock plug on control sensor on left and right and disconnect | |
| Unclip cable duct of oxygen sensors | Fitted to underside of transmission. |
| Unlock plug on oil level sensor and disconnect | |
| Unlock plug of crankshaft pulse generator and disconnect | |
| Unlock plug on tank venting valve and disconnect | |
| Unlock plug on coolant temperature sensor and disconnect | |
| Unlock plug on coolant thermostat and disconnect | |
| Unlock plug on oil pressure switch and disconnect | |
| Unlock plug of knock sensors on left and right on cable duct and disconnect | |
| Release control lines on starter motor | |
| Unlock plugs of fuel injectors on cable duct and disconnect | |
| 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 plugs on both solenoid valves on left side and disconnect | |
| Unlock plugs on both solenoid valves on right side and disconnect | |
| Unlock plugs on left and right Valvetronic servomotors and disconnect | |
| Unlock plugs on left and right eccentric shaft sensors and disconnect | |
| Unlock plug on throttle valve potentiometer and disconnect | |
| Unlock plug on differential pressure sensor and disconnect | |
| Unlock plug on air-mass flow sensor and disconnect | |
| Unlock plug on DISA servomotor and disconnect | |
| Release negative lead on spring strut dome | |
Unlock plug connections in electronics box and disconnect:
|
Installation:
Read out fault memory of control unit of Digital Motor Electronics (DME).
Check stored fault messages.
Now clear the fault memory.