Preventing Personal Injury and Damage to Injection and Ignition Systems

Preventing Personal Injury and Damage to Injection and Ignition Systems

To prevent personal injury and damage to the injection and ignition system, observe the following:

• Do not touch or disconnect ignition coils with power output stages when engine is running or turning at starting RPM.

• The ignition must be switched off before connecting or disconnecting injection and ignition system wiring or tester cables.

• If engine is to be cranked at starting RPM without starting (for example for compression testing), disconnect connectors from ignition coils and from fuel injectors. After performing work, check and erase DTC memory.

• Only clean engine with ignition switched off.

• If electrical connectors were disconnected, faults are saved in ECM:

- Connect Vehicle Diagnosis, Testing and Information System (VAS 5051B).

- Start "Guided Functions" operating mode.

- Generate readiness code in ECM.