Technician Safety Information

Safety Precautions

Note the following when working on the fuel system:

CAUTION:
There is a risk of injury because the fuel is under very high pressure.
^ Before opening high pressure area of the fuel injection system, fuel pressure must be relieved to residual pressure.
^ To reduce remaining residual pressure, lay a clean cloth around the connector and carefully loosen connector.

- Procedures before opening high pressure fuel injection system.

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 injection and 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 5051B.
- Start "Guided Functions" operating mode.
- Generate readiness code in ECM.

CAUTION:
Risk of destroying electrical components when battery is disconnected.
^ Observe measures when disconnecting battery.
^ Only disconnect battery with ignition switched off.

- Disconnect battery.

Note the following when working on the cooling system:

CAUTION:
Risk of scalding due to hot steam and hot coolant.
^ When the engine is warm the cooling system is under pressure.
^ To reduce pressure, cover coolant reservoir cap with cloth and carefully open.

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

CAUTION:
Distraction and improperly secured test equipment can lead to accidents.
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.
^ Always secure testers on the rear seat with a strap and have a second person on the rear seat operate them.