BMW X5: Engine Wiring Loom

REPLACING WIRING HARNESS SECTION FOR ENGINE (N52K)

Special tools required:

• 24 2 390.

IMPORTANT: Read and comply with notes on protection against electrostatic damage (ESD protection)!

Necessary preliminary tasks:

• Read out DME fault memory
• Switch off ignition
• Disconnect battery negative lead
• Remove microfilter housing
• Remove intake air manifold

Unclip Bowden cable for engine bonnet/hood actuator from transverse reinforcement (1).

Release screws on left and right sides. Tightening torque 51 71 4AZ.

Remove cross-brace (1).

Lever out expander rivet.

Remove gasket (1).

Feed out partition (3) and remove.

Fig. 63: Detaching Electronics Box Cover From Fixture

Lever out expander rivet.

Release locks in direction of arrow.

Feed out fresh air duct (1) and remove.

Fig. 64: Identifying Plug Connections

1. Air conditioner compressor
2. Oil-pressure switch
3. VANOS solenoid valves 1-4
4. Knock sensor, right and left
5. Throttle-valve actuator
6. Air-mass sensor
7. Tank venting valve
8. Plug connection BSD alternator
9. VANOS solenoid valves 5-8
10. Coolant temperature sensor
11. Map thermostat

Open retainers.

Release lock (1) in direction of arrow.

Remove cover (2).

Fig. 65: Identifying Plug Connections

1. Exhaust camshaft sensor
2. VVT sensor (5 to 8)
3. Inlet camshaft sensor
4. Injection wiring harness (5 to 8)
5. VVT servodrive (5 to 8)
6. Release screws.
7. VVT servodrive (1 to 4)
8. Injection wiring harness (1 to 4)
9. Inlet camshaft sensor
10. Exhaust camshaft sensor
11. VVT sensor (1 to 4)
12. Differential pressure sensor
13. DISA gear

Release screws and remove retaining bar (1).

Unlock upper section (2) of partition seal in direction of arrow and remove.

Release grommets (3) for wiring harnesses from lower section of partition seal and from electronics box.

Installation:

Make sure grommets are correctly seated (watertightness).

Fig. 66: Identifying Plug Connections

1. Automatic transmission
2. Not used
3. Monitor sensor, left and right
4. Term. 50 starter motor
5. Crankshaft sensor
6. Oil level sensor
7. Control sensors (oxygen sensors)

Raise control unit (2) slightly.

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

Fig. 67: Identifying Plug Connections

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.

Unlock tabs (1) and pull contact carrier (2) out of housing.

REFERENCE CHART

Unlock and disconnect plug (1) by turning.

Release wiring harness from holders.

Insert special tool 24 2 390 in sealing sleeve.

These tasks are described in Notes on mechatronics.

(Important: Observe important note)

NOTE: Check stored fault messages.

Now clear the fault memory.

REPLACING WIRING HARNESS SECTION FOR IGNITION COIL (N52K)

IMPORTANT: Aluminum-magnesium materials.

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).

Necessary preliminary tasks:

• Read out DME fault memory.
• Switch off ignition.
• Disconnect battery negative lead.
• Remove ignition coil cover.
• Remove control unit plug.

Release screws and remove retaining bar (1).

Unlock upper section (2) of partition seal in direction of arrow and remove.

Release grommets (3) for wiring harnesses from lower section of partition seal and from electronics box.

Installation:

Make sure grommets are correctly seated (watertightness).

Fig. 68: Locating Ignition Coil Covers Screws And Holder

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

Unlock and disconnect all plug connections of ignition coil wiring harness section in electronics box.

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

Fig. 69: Locating Grounding Cable And Screws

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

REFERENCE CHART

NOTE: Check stored fault messages.

Now clear the fault memory.

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