General notes on ignition system

• This section deals specifically with ignition - related components. For the other components of the injection and ignition system, refer to FUEL INJECTION, SERVICING .
• 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 AFP. See PARTS OF THE IGNITION, REMOVING AND INSTALLING (VEHICLES WITH ENGINE CODE AFP) .
• Vehicles with engine code BDF. See PARTS OF THE IGNITION, REMOVING AND INSTALLING (VEHICLES WITH ENGINE CODE BDF) .

Safety precautions. See SAFETY PRECAUTIONS .

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