Replacing Wiring Harness Section for Ignition and Injectors (N54)

12 51 100 - Replacing wiring harness section for ignition and injectors (N54)





Important!
Aluminium screws/bolts must be replaced each time they are released.
Aluminium screws/bolts are permitted with and without color coding (blue).
For reliable identification:
Jointing torque and angle of rotation must be observed without fail (risk of damage).





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
- Remove acoustic cover
- Remove intake filter Service and Repair





Unlock cover (1) with slide (3). Release screws (2).
Remove cover (1).





Unlock all plugs (1) of DME control unit and disconnect.
If necessary, unlock control unit and raise approx. 5 cm.





Press locking tab (1) in direction of arrow and pull contact carrier (2) out of housing.





Press locking tabs (1) in direction of arrow and pull contact carrier (2) out of housing.





Press locking tab (1) in direction of arrow and pull contact carrier (2) out of housing.





Release screws and remove cable duct (1).

Installation Note:
Replace aluminium screws.
Tightening torque 12 52 2AZ [1][2]Power and Ground Distribution.









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