Replacing Impulse Sensor (Cylinder Bank 7-12) (M73)

Replacing Impulse Sensor (Cylinder Bank 7-12) (M73)

Interrogate fault memory of DME control unit.
Switch off ignition.
Remove rear splash guard.







Disconnect plug connection on impulse sensor on crankshaft (flywheel) for DME 2 (cylinder 7-12).







Unscrew screw. Remove impulse sensor.

Installation:
Observe the following when replacing the transmission, the flywheel or the pulse sensor:
Note whether one or more shims are installed between the transmission housing and the pulse sensor. If one or more shims are installed, the distance between the pulse sensor and the pulse teeth of the increment wheel must be measured.







Turn the engine on the front central bolt so that a full pulse tooth (1) can be seen through the opening of the removed pulse sensor.
Make sure that the pulse tooth (1) is exactly centred in the hole.







The depth to the pulse teeth of the flywheel must be determined with special tool 00 2 407.
Note depth.







Measure depth (A) of pulse sensor.
Deduct depth (A) of pulse sensor from depth of flywheel. This result is the gap dimension.
Adjust a gap dimension of 0.55 ± 0.2 mm with the shims.
The dimension 0.55 mm should be achieved as exactly as possible in order to:
1. Enable exact misfiring recognition.
2. Prevent pulse sensor from contacting pulse teeth.
Refer to BMW Parts Service for shims.

Installation:
Interrogate fault memory of control unit on Digital Motor Electronics (DME), check fault messages in memory, rectify faults and cancel fault memory.