General notes on ignition system

• This section deals specifically with ignition - related components. The other components of the injection and ignition system, see 24 - MULTIPORT FUEL INJECTION (MFI) .
• For the electric components to work properly, a voltage of at least 11.5 V is required.
• 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 an On Board Diagnostic (OBD)
• Components marked with * are tested via On Board Diagnostic (OBD), see DIAGNOSTIC MODE 3: CHECK DTC MEMORY .
• It is possible that the control module will recognize a malfunction and store a DTC during some tests. Therefore the following work steps must be performed in the mentioned sequence after ending all tests and repairs. 

- - Check DTC memory  , see DIAGNOSTIC MODE 3: CHECK DTC MEMORY

- - Erase DTC memory  , see DIAGNOSTIC MODE 4: RESET/ERASE DIAGNOSTIC DATA .

- - For completion, generate readiness code  , see READINESS CODE, GENERATING .

Parts of ignition, removing and installing:

• Vehicles with engine code AWD, see PARTS OF THE IGNITION, REMOVING AND INSTALLING (VEHICLES WITH ENGINE CODE AWD) 
• Vehicles with engine code AWP, AWW, see PARTS OF THE IGNITION, REMOVING AND INSTALLING (VEHICLES WITH ENGINE CODE AWP, AWW) .

Safety precautions, see SAFETY PRECAUTIONS .

Test data, spark plugs, see TEST DATA, SPARK PLUGS .