Ignition System: Service Precautions

Safety Precautions

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


Distraction and improperly secured test equipment can lead to accidents.

There is a risk that the passenger airbag could deploy in a collision.

• Operating testing and measuring equipment while driving creates a distraction.

• There is an increased risk of injury due to unsecured testing and measuring equipment.

• Always secure testers on the rear seat with a strap and have a second person on the rear seat operate them.

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

• Individuals with a pacemaker must not stay in the danger area of high voltage systems, for example ignition systems, xenon light.

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

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

• Only clean engine with ignition switched off.

• 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.

• While testing it is possible that there may be some faults stored in the engine control module. After completing all testing and repairs, check the DTC memory. If a fault has been stored:


Risk of destroying electrical components when battery is disconnected.

• Observe measures when disconnecting battery.

- Disconnect battery.