Ignition System: Service Precautions

Safety Precautions

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

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

• 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 5051).

- Start "Guided Functions" operating mode.

- Generate readiness code in ECM.

Risk of destroying electrical components when battery is disconnected.

• Observe measures when disconnecting battery.

• Only disconnect battery with ignition switched off.

If it is necessary to use testing and measuring devices on road tests, observe the following

There is a risk of injury from the passenger airbag deploying in an accident.

• Always secure testing and measuring equipment on the rear seat and have a second person operate it from there.