Ignition System: Service Precautions

Safety Precautions

To reduce the risk of personal injury and/or damage to the fuel injection and ignition system, always observe the following:

• Do not touch or remove ignition wires when engine is running or turning at starter speed.

• The battery must only be disconnected and connected with the ignition switched off, since the Engine Control Module (ECM) can otherwise be damaged.

• Only disconnect and reconnect wires for the injection and ignition system, including test leads, when the ignition is switched off.

• If the engine is to be cranked at starting RPM without starting (e.g. for compression testing), disconnect connectors from the power output stages for ignition coils and remove the fuse for the fuel injectors. After performing work, check and erase the DTC memory.

• Only clean the engine with the ignition switched off.