12 51 001 Replacing Wiring Harness Section For Engine (N62)
Switch off ignition.
Disconnect battery. See 12 00 ... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY .
Remove acoustic cover.
Remove design cover.
Remove ignition coil cover on left and right.
Release cable duct from intake air manifold.
Remove transmission underguard.
Remove right exhaust manifold. See 18 00 020 REMOVING AND INSTALLING COMPLETE EXHAUST SYSTEM (N62) .
Remove heat shield from starter motor.
| Work step | Note: |
|---|---|
| Unlock plug on oxygen monitor sensor on left and right and disconnect. | |
| Unlock plug on oxygen control sensor on left and right and disconnect. | |
| Unclip cable duct of oxygen sensors. | Fitted to underside of transmission. |
| Unlock plug on oil level switch and disconnect. | |
| Unlock plug of crankshaft pulse generator and disconnect. | |
| Unlock plug on tank venting valve and disconnect. | |
| Unlock plug on alternator 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 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: Make sure profile seals are correctly positioned. |
Installation:
Read out fault memory of control unit of Digital Motor Electronics (DME).
Check stored fault messages.
Rectify faults.
Now clear the fault memory.
Necessary preliminary tasks:
- Read out DME fault memory
- Disconnect battery negative lead . See 12 00 ... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY .
- Engine bonnet/hood in assembly position. See 51 00 ... SERVICE POSITION OF ENGINE HOOD/BONNET .
- Remove fresh air duct on right and if necessary on left (if applicable).
- Remove center of assembly partition wall.
- Remove intake air manifold
- Remove underbody protection at front/rear
- Remove reinforcement plate . See 31 10 010 REMOVING AND INSTALLING/REPLACING REINFORCEMENT PLATE .
- Remove electric fan with fan cowl
- Remove right exhaust manifold . See 18 00 020 REMOVING AND INSTALLING COMPLETE EXHAUST SYSTEM (N62) .
- Remove starter motor . See 12 41 020 REMOVING AND INSTALLING/REPLACING STARTER MOTOR (N62) .
- Remove alternator . See 12 31 020 REMOVING AND INSTALLING OR REPLACING ALTERNATOR (N62) .
Release screws (2).
Detach electronics box cover (1) from fixture (3) in direction of arrow towards right.
Installation:
Secure electronics box cover (1) in direction of arrow on left in fixture (3).
Unfasten following plug connections:
Unfasten following plug connections:
Unfasten following plug connections:
Unfasten following plug connections:
Installation:
Fit profile seals correctly.
Check for water leaks.
Assemble engine.
Check electronics box cover and rubber grommets on equipment carrier for watertightness.