Safety Precautions, Fuel System

Fuel System

Note the following when working on the fuel system:


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

• Reduce the fuel pressure down to residual pressure before opening the high pressure area of the fuel injection system.

• To reduce remaining residual pressure, place 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:

• Turn off the ignition before disconnecting and connecting the wiring for the injection and ignition system. This includes tester cables as well.

• Only clean engine with ignition switched off.

• If the connectors were disconnected and the engine was started, then malfunctions have been stored in the engine control module DTC memory: Generate readiness code in Guided Functions using the vehicle diagnostic tester.


Risk of destroying electronic components when disconnecting the battery.

• Observe measures for disconnecting battery.

• Only disconnect the battery with ignition switched off.

- Disconnect the battery.