12 51 001 Replacing Wiring Harness Section for Engine

12 51 001 - Replacing wiring harness section for engine (N52K, N51)





Important!
Read and comply with notes on protection against electrostatic damage (ESD protection) 61 35 ... Notes on ESD Protection (Electro Static Discharge).





Necessary preliminary tasks:
- Read out fault memory of DME control unit
- Switch off ignition
- Disconnect battery negative lead 61 20 900 Disconnecting and Connecting Battery Negative Lead
- Remove intake air manifold Service and Repair





Unlock fasteners (1) from below and slide upwards approx. 10 mm.
Unlock locks (2) in direction of arrow.
Remove cover (3).





Unlock plug (1) and remove.
Release grommet (2) from electronics box.

Installation Note:
Make sure grommet (2) is correctly seated in housing (watertightness).

Unlock control unit (3) and raise slightly.





Unlock plugs (1) using slide in direction of arrow and disconnect.





Long plug:
Unlock plug on control unit and disconnect.
Unlock tab (1), pull contact carrier (2) in direction of arrow out of housing.





Short plug:
Unlock slide (2) in bore holes (1) and pull out of housing.
Unlock tab (3), pull contact carrier (4) in direction of arrow out of housing.
Unlock and disconnect all plug connections of engine wiring harness section in electronics box.










Note:
Check stored fault messages.
Now clear the fault memory.