Troubleshooting Transistor Coil Ignition (TCI)

TROUBLESHOOTING TRANSISTOR COIL IGNITION (TCI)

Testing Requirements:
- Battery charged (voltage > 12 V)
- Specified fuel in tank (octane rating lead content)
- Ambient temperature approx 20°C (68°F); considerable deviation would change the measured values.
- Testing instructions refer to the BMW SERVICE TEST, e.g. engine test/test step 02 (P 05) or multimeter 02 (M 02).
- Make connections according to operating instructions.

Important:
- Refer to instructions for working on TCI and DME.
- Faults in TCI will be indicated by:

a) Engine not starting running incorrectly
b) Misfiring in different operating conditions
c) Poor engine output