Ignition system, general notes

Only the components which specifically relate to the ignition system are dealt with here. The miscellaneous fuel injection and ignition system components → Fuel injection system, servicing
For trouble-free operation of the electrical components a voltage of at least 11.5 V is necessary.
The battery must only be disconnected and connected with the ignition switched off, since the Engine Control Module (ECM) can otherwise be damaged.
The Engine Control Module (ECM) is equipped with On Board Diagnostics (OBD).

Components marked with are tested via On Board Diagnostic (OBD) → Diagnostic mode 3: Check DTC memory .
During some checks it is possible that the control module will detect and store a malfunction. Therefore the following work steps must be performed in the mentioned sequence after ending all tests and repairs.