Wiring Harness: Service and Repair

Replacing Wiring Harness Section For Engine (S54)


NOTE:
Switch off ignition.
Follow instructions for disconnecting and connecting battery.
Disconnect and cover battery negative lead.


Preparatory tasks:
- Remove intake air manifold.
- Remove fan cowl.
- Remove ignition coil cover.

Work step
Unlock plug on idle-speed control valve and disconnect.
Unlock plug on throttle actuator and disconnect
Unlock plug on throttle potentiometer and disconnect
Unlock plug on solenoid valve for VANOS and disconnect


NOTE: Follow removal instructions.


Unlock connector strip of fuel injectors and disconnect
Disconnect plug of inlet camshaft sensor from connector strip.
Unlock plug on oil pressure switch and disconnect
Unlock plug on coolant temperature sensor and disconnect
Unlock plug on knock sensors and disconnect
Unlock pulse generator plug on exhaust camshaft and disconnect
Unlock plug on alternator and disconnect
Detach battery positive lead at alternator.


NOTE:
Remove oil lines.



Unlock plug on oil level switch and disconnect


NOTE: D0 not remove oil level switch.


Detach battery positive lead and control lead from starter motor.



Unlock pulse generator plug for crankshaft on distributor housing and disconnect
Unlock plug connections in electronics box and disconnect:
- from control unit
- from DME relay


NOTE:
Remove electronics box cover.
Do not remove control unit.







Release screw and remove manifold support (1).

Installation:
To avoid manifold torsion stress, secure manifold support with screw but do not tighten down screw. Only tighten down screw when manifold is mounted on throttle assembly.







Release screws and remove cable duct (1).







Detach sealing strip (1).
Turn toggle (2) through 90 °.
Remove partition wall for equipment compartment (3).
Release nut.
Remove cable housing (4).

Installation Note: Ensure profile seals are correctly positioned.