3 Series E36 318is (M42) COUPE
S50:
Unfasten screws.
Remove ignition coil cover.
Circuit diagram of compact ignition coil in breakerless ignition
distribution system.
A= Piloting primary coil from DME control unit
B= Ignition coil
C= Ground connection on secondary coil
Multimeter Test:
Resistance of primary coil is measured between terminals 1
and 15 and
R = 0.4 ... 0.8
Ω
Resistance of secondary coil cannot be measured.
1.
Terminal 15
2.
Terminal 4a
3.
Terminal 1
Check casting compound of coil carrier for hairline cracks.
If the gray material has emerged at the edges of the coil carrier,
this indicates a faulty ignition output stage in the DME control unit.
Replace ignition coil.
Check DME control unit.
Additional notes on checking:
refer to 12 13 ... Checking secondary voltage using test adapter
kit 12 7 040
RA Checking ignition coil (primary coil) (M42, M50, S50)
BMW AG - TIS
28.01.2013 01:55
Issue status (12/2007) Valid only until next DVD is issued
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