12 51 001 Replacing wiring harness section for engine (N62, N62TU)
WARNING: This page is about a different car, the 2005 BMW 545i and 2004 BMW 545i. However, it is still accessible from the selected car via links, so may be relevant.
Necessary Preliminary Tasks:
- Read out fault memory of DME control unit; if necessary, work through test schedules.
- Switch off ignition
- Disconnect battery, refer to 12 00 ... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY .
- Remove acoustic cover.
- Remove fan cowl. Refer to 17 11 035 REMOVING AND INSTALLING/REPLACING FAN COWL WITH ELECTRIC FAN (N62, N62TU) .
- Remove alternator. Refer to 12 31 020 REMOVING AND INSTALLING OR REPLACING ALTERNATOR (N62) .
- 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 oxygen monitor sensor on left and right and disconnect. Refer to 11 78 540 REPLACING LEFT OXYGEN MONITOR SENSOR (N62 / N62TU) and/or 11 78 543 REPLACING RIGHT OXYGEN MONITOR SENSOR (N62/N62TU) . | |
| Unlock plug on control sensor on left and right and disconnect. Refer to 11 78 530 REPLACING LEFT OXYGEN CONTROL SENSOR (N62/N62TU) and/or 11 78 533 REPLACING RIGHT OXYGEN CONTROL SENSOR (N62/N62TU) . | |
| 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, N62TU) . | |
| Unlock plug on tank venting valve and disconnect. Refer to 13 90 500 REPLACING TANK VENTING VALVE (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, N62TU) and/or 12 14 611 REPLACING LEFT KNOCK SENSORS (N62, N62TU) . | |
| Release control lines on starter motor. Refer to 12 41 020 REMOVING AND INSTALLING/REPLACING STARTER MOTOR (N62, N62TU) . | |
| 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, N62TU) and/or 12 14 526 REPLACING PULSE GENERATOR ON RIGHT INLET CAMSHAFT (N62, N62TU) . | |
| 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, N62TU) and/or 12 14 513 REPLACING PULSE GENERATOR ON RIGHT EXHAUST CAMSHAFT (N62, N62TU) . | |
| Unlock plugs on both solenoid valves on left side and disconnect. Refer to 11 36 715 REMOVING AND INSTALLING/REPLACING BOTH LEFT SOLENOID VALVES (N62/N62TU . | |
| Unlock plugs on both solenoid valves on right side and disconnect. Refer to 11 36 720 REMOVING AND INSTALLING/REPLACING BOTH RIGHT SOLENOID VALVES (N62/N62TU) . | |
| 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/N62TU) and/or 11 37 024 REMOVING AND INSTALLING/REPLACING SERVOMOTOR FOR RIGHT ECCENTRIC SHAFT (N62/N62TU) . | |
| 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/N62TU) and/or 11 37 040 REMOVING AND INSTALLING/REPLACING RIGHT ECCENTRIC SHAFT SENSOR (N62/N62TU) . | |
| Unlock plug on throttle valve potentiometer and disconnect. Refer to 13 54 030 REMOVING AND INSTALLING/SEALING THROTTLE VALVE ASSEMBLY (N62, N62TU) . | |
| Unlock plug on differential pressure sensor and disconnect. Refer to 13 62 010 REMOVING AND INSTALLING/REPLACING DIFFERENTIAL PRESSURE SENSOR (N62, N62TU) . | |
| Unlock plug on air-mass flow sensor and disconnect. Refer to . | |
| Unlock plug on DISA servomotor and disconnect. | |
| Release negative lead on spring strut dome. | |
Unlock plug connections in electronics box and disconnect:
|
Installation:
Now clear the fault memory.