12 13 Notes on checking ignition system

Troubleshooting:

• Fault in fuel injection system.
• Spark plug faults.
• Ignition coil faults.
• Further fault patterns with evaluation.
• Additional fault notes for troubleshooting.

Oscillograms:

• Normal oscillogram. Refer to 12 13 ... NORMAL OSCILLOGRAM (M, S, W ENGINES ONLY) .
• Oscillograms of ignition coils from different manufacturers.

Check:

• Secondary signal for stationary ignition distribution.