12 13 Notes on checking ignition system

Troubleshooting 

1. -> Fault in fuel injection system. See FAULT IN FUEL INJECTION SYSTEM .
2. -> Spark plug faults. See SPARK-PLUG FAULTS .
3. -> Ignition coil faults. See IGNITION COIL FAULTS .
4. -> Further fault patterns with evaluation. See FURTHER FAULT PATTERNS WITH EVALUATION .
5. -> Additional fault notes for troubleshooting. See ADDITIONAL FAULT NOTES FOR TROUBLESHOOTING .

Oscillograms 

1. -> Normal oscillogram. See 12 13 ... NORMAL OSCILLOGRAM (M, S, W ENGINES ONLY) 
2. -> Oscillograms of ignition coils from different manufacturers. See OSCILLOGRAMS OF IGNITION COILS FROM DIFFERENT MANUFACTURERS .

Check 

1. -> Secondary signal for stationary ignition distribution. See 12 13 ...CHECKING SECONDARY SIGNAL FOR STATIONARY IGNITION DISTRIBUTION  .