12 51 001 Replacing wiring harness section for engine (N14)
IMPORTANT:
Read and comply with Notes On Protection Against Electrostatic Damage (ESD Protection).
Necessary preliminary tasks:
- Read out fault memory of DME control unit
- Switch off ignition
- Disconnect Battery Negative Lead
- Remove Intake Air Manifold
- remove Sound Generator
Unlock and remove cover (1).
Unlock the two rear plugs (1) and disconnect.
Release clamps (2).
Detach pressure pipe (3) and remove.
Remove clean air pipe (4).
Unlock and detach plugs (1 and 3).
Unlock and detach vacuum line (2).
Carefully detach cable duct (4) upwards slightly from holder.
WORK STEP CHART
| Work step | Note: |
|---|---|
| Unlock plug for coolant temperature sensor and disconnect | |
| Unlock plugs for ignition coils and disconnect | |
| Disconnect ground connection at cylinder head | For tightening torque refer to 12 51 1AZ in 12 51 PLUG CONNECTIONS, TERMINALS, LOOSE PARTS . |
| Unlock plug for control sensor and disconnect | |
| Unlock plug for electric valve on turbocharger and disconnect | |
| Unlock plug for auxiliary water pump and disconnect | |
| Unlock plug for monitor sensor and disconnect | |
| Unlock plug for coolant thermostat and disconnect | |
| Unlock plug for high-pressure pump and disconnect | |
| Unlock plug for high-pressure sensor and disconnect | |
| Unlock plug for knock sensor and disconnect | |
| Unlock plug for crankshaft sensor and disconnect | |
| Unlock plugs for injectors and disconnect | |
| Unlock plug for solenoid valve and disconnect | |
| Unlock plugs for temperature and boost pressure sensors and disconnect | |
| Unlock plug for friction gear and disconnect |
NOTE:
Check stored fault messages.
Now clear the fault memory.