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Home >> Mini >> 2010 >> Cooper S, 2D Hatchback, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2912 (Engine Electrical System - Repair - E91) >> 1251 Engine Wiring Loom >> 12 51 001 Replacing wiring harness section for engine (N52K, N51) >> Necessary preliminary tasks

Necessary preliminary tasks

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Unlock fasteners (1) from below and slide upwards approx. 10 mm.

Unlock locks (2) in direction of arrow.

Remove cover (3).

Fig 1: Unlocking Locks
G04751288Courtesy of BMW OF NORTH AMERICA, INC.

Unlock plug (1) and remove.

Release grommet (2) from electronics box.

Installation: 

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

Unlock control unit (3) and raise slightly.

Fig 2: Identifying Electronics Box Grommet, Control Unit And Connector
G04751291Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 3: Sliding Plugs
G04751363Courtesy of BMW OF NORTH AMERICA, INC.

Long plug:

Unlock plug on control unit and disconnect.

Unlock tab (1), pull contact carrier (2) in direction of arrow out of housing.

Fig 4: Pulling Contact Carrier
G04751358Courtesy of BMW OF NORTH AMERICA, INC.

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.

Fig 5: Pulling Contact Carrier Out Of Housing
G04751359Courtesy of BMW OF NORTH AMERICA, INC.
WORK STEP REFERENCE CHART

Work step Note:
Unlock plug connections on control sensors and disconnect  
Unlock plug on alternator and disconnect  
Unlock plug connection on knock sensors and disconnect  
Unlock plug on crankshaft sensor and disconnect  
Unlock plug on starter motor and disconnect  
Remove REAR UNDERBODY PROTECTION  
Unlock plug connections on monitor sensors and disconnect  
Unlock plug on oil condition sensor and disconnect  
NOTE: Check stored fault messages.
Now clear the fault memory.