12 51 001 Replacing wiring harness section for engine (N62)
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Necessary preliminary tasks:
- Switch off ignition
- Disconnect battery, refer to 12 00... Instructions for disconnecting and connecting battery
- Remove acoustic cover
- Remove design cover
- Remove ignition coil cover on left and right. See 12 13 511 Replacing ignition coil (N62)
- Release cable duct from intake air manifold. See 13 54 250 REPLACING AIR INTAKE HOSE (BETWEEN AIR-MASS FLOW SENSOR AND THROTTLE VALVE ASSEMBLY) (N62)
- Remove transmission underbody protection. See AUTOMATIC TRANSMISSION
- Remove right exhaust manifold, refer to 18 40 020 REMOVING AND INSTALLING/REPLACING RIGHT EXHAUST MANIFOLD (N62)
- Remove heat shield from starter motor. See STARTER
ENGINE WIRING LOOM
| Work step | Note: |
|---|---|
| Unlock plug on oxygen monitor sensor on left and right and disconnect. Refer to 11 78 540 REPLACING LEFT OXYGEN MONITOR SENSOR (N62) and 11 78 543 REPLACING RIGHT OXYGEN MONITOR SENSOR (N62) . | |
| 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. Refer to 12 61 285 Replacing engine oil level switch (N62) . | |
| Unlock plug of crankshaft pulse generator and disconnect. Refer to 12 14 521 Replacing crankshaft pulse generator (N62) . | |
| Unlock plug on tank venting valve and disconnect. Refer to 13 90 500 REPLACING TANK VENTING VALVE (N62) . | |
| Unlock plug on alternator and disconnect. Refer to 12 31 020 Removing and installing or replacing alternator (N62) . | |
| Unlock plug on coolant temperature sensor and disconnect. Refer to 13 62 531 REPLACING COOLANT TEMPERATURE SENSOR (N62) . | |
| Unlock plug on coolant thermostat and disconnect. Refer to 11 53 000 REMOVING AND INSTALLING/REPLACING COOLANT THERMOSTAT (N62) . | |
| Unlock plug on oil pressure switch and disconnect. Refer to 12 61 280 Removing and installing/replacing oil pressure switch (N62) . | |
| Unlock plug of knock sensors on left and right on cable duct and disconnect. Refer to 12 14 610 Replacing right knock sensors (N62) and 12 14 611 Replacing left knock sensors (N62) . | |
| Release control lines on starter motor. Refer to 12 41 020 Removing and installing/replacing starter motor (N62) . | |
| Unlock plugs of fuel injectors on cable duct and disconnect | |
| Unlock plug on pulse generator of left and right inlet camshafts and disconnect. Refer to 12 14 522 Replacing pulse generator on left inlet camshaft (N62) and 12 14 526 Replacing pulse generator on right inlet camshaft (N62) . | |
| Unlock plug on pulse generator of left and right exhaust camshafts and disconnect. Refer to 12 14 512 Replacing pulse generator on left exhaust camshaft (N62) and 12 14 513 Replacing pulse generator on right exhaust camshaft (N62) . | |
| Unlock plugs on both solenoid valves on left side and disconnect. Refer to 11 36 715 REMOVING AND INSTALLING/REPLACING BOTH SOLENOID VALVES ON LEFT SIDE (N62) . | |
| Unlock plugs on both solenoid valves on right side and disconnect. Refer to 11 36 720 REMOVING AND INSTALLING/REPLACING BOTH SOLENOID VALVES ON RIGHT SIDE (N62) . | |
| Unlock plugs on left and right Valvetronic servomotors and disconnect. Refer to 11 37 022 REMOVING AND INSTALLING/REPLACING SERVOMOTOR FOR LEFT ECCENTRIC SHAFT (N62) and 11 37 024 REMOVING AND INSTALLING/REPLACING SERVOMOTOR FOR RIGHT ECCENTRIC SHAFT (N62) . | |
| Unlock plugs on left and right eccentric shaft sensors and disconnect. Refer to 11 37 035 REMOVING AND INSTALLING/REPLACING LEFT ECCENTRIC SHAFT SENSOR (N62) and 11 37 040 REMOVING AND INSTALLING/REPLACING RIGHT ECCENTRIC SHAFT SENSOR (N62) . | |
| Unlock plug on throttle valve potentiometer and disconnect. Refer to 13 54 030 REMOVING AND INSTALLING/SEALING THROTTLE ASSEMBLY (N62) . | |
| Unlock plug on differential pressure sensor and disconnect. Refer to 13 62 010 REMOVING AND INSTALLING/REPLACING DIFFERENTIAL PRESSURE SENSOR (N62) . | |
| Unlock plug on air-mass flow sensor and disconnect. Refer to 13 62 560 REMOVING AND INSTALLING/REPLACING AIR-MASS FLOW SENSOR (N62) . | |
| 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.