Checking Ignition Coil

- Connect BMW service test unit.
- Carry out engine test step 09.
- Observe oscillograph ignition voltage and ignition voltage deviation must agree with nominal values.





Multimeter Test (M06):
- Measure resistance of primary coil (term. 1/15) and secondary coil (term. 15/4).





- Check for hairline cracks and signs of burning.
- Check plug (S) for tight fit - if pressed out, replace ignition coil.