Safety Precautions

Safety Precautions

Note the Following When Working on the Fuel System:

There is a risk of injury because the fuel is under very high pressure.

• Before opening high pressure components of the fuel injection system, pressure must be relieved to residual pressure.

• To reduce residual pressure, lay a clean cloth around connector and carefully loosen connector.

- Procedures before opening high pressure fuel injection system => [ Releasing Fuel Pressure on High Pressure Side ] Service and Repair.

To Prevent Personal Injury and Damage to the 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.

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:

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:

Risk of accident due to distraction and testing and measuring instruments not being sufficiently secured.

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.