Fuel injection System

Safety Precautions

To Reduce the Risk of Personal Injury and/or Damage to the Fuel Injection and Ignition System, Always Observe the Following

CAUTION!
• Fuel system is under high pressure! Before opening high pressure components of the fuel injection system, pressure must be relieved to residual pressure => [ High-Pressure Fuel Injection System, Pressure Relief ] Service and Repair.

• Then wrap a clean rag around the connection and relieve residual pressure by carefully loosening the connection.

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

• It is possible that the control module will recognize a malfunction and store a DTC during some tests. Therefore, when all tests and repairs are completed, the DTC memory must be checked and, if necessary, erased. After DTC memory is erased, a readiness code must be generated for the engine control module using operating mode "Guided Fault-Finding".

• Clean engine only with ignition switched off.

CAUTION!
• The battery must only be disconnected and connected with the ignition switched off, since the Engine Control Module (ECM) can otherwise be damaged.

• Observe safety precautions when disconnecting the battery.

Observe the Following if Test and Measuring Instruments are Required During a Test Drive

CAUTION!
• Test and measuring equipment must always be secured to the rear seat and be operated from there by a second person.

• If test and measuring instruments are operated from the front passenger's seat and the vehicle is involved in an accident, there is a possibility that the person sitting in this seat may receive serious injuries when the airbag is triggered.