Ignition System: Service Precautions

Safety Precautions

If special testing equipment is required during road test, note the following:





CAUTION!
Improperly secured testing and measuring equipment and distraction during a road test increase the risk of an accident.

Risk of passenger airbag deploying in an accident.

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

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

• Position passenger's seat as far back as possible.

• Only use the vehicle diagnosis and service system (VAS 5052) or diagnostic system (VAS 5053).

• Testing and measuring instruments - 1 - must lay flat on the passenger's thighs and be operated by him or her, as shown in the illustration.

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.

• Always switch ignition off before disconnecting or reconnecting wires for the ignition system, including high voltage wiring and test leads.

• 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.

• Cleaning the engine should only be performed with ignition switched off.

• The battery must only be disconnected and connected with the ignition switched off, since the engine control module (ECM) can otherwise be damaged.