Troubleshooting Pulse Transmitter In Distributor

CHECKING PULSE TRANSMITTER IN DISTRIBUTOR





Caution: Always turn off ignition before working on dangerous high power ignition systems!

- Take off protective cap.
- Pull off plug on ignition control unit.





- Connect BMW service test unit (M 06) or ohmmeter on plug pins (term. 5 and 6) of plug.
- Check coil resistance, 960 Ohms ± 10%.
- If nominal value is not reached, check plug connection on distributor or, if necessary, replace pulse transmitter coil.





- Check distance (A) between pulse transmitter and pulse transmitter gear, adjusting if necessary.
A = 0.35 - 0.7 mm (0.014 - 0.028 in)





- Connect multimeter (M 02) and oscilloscope (M 22) of BMW service test unit on disconnected ignition control unit plug (term. 5 and 6) according to operating instructions. Crank engine with starter - approx. 200 to 300 rpm.
- Voltage of 1.0 to 2.0 V should be produced. Figure shows oscillograph which should appear on screen.