Safety precautions

To prevent injuries to persons and/or damage to the injection and ignition system, the following must be observed:

• For safety reasons, the fuse for the fuel pump must be removed from the fuse holder before opening the fuel system. Otherwise, the fuel pump could be activated by the driver door contact switch. Fuse assignment ⇒ Current flow diagrams, Electrical fault finding and Fitting locations
• Do not touch or disconnect ignition cables when the engine is running or being turned at starter speed.
• Switch off ignition before connecting or disconnecting injection and ignition system wiring as well as test instrument cables.

Note the following if testers and measuring instruments have to be used during a road test:

• Test and measuring instruments must always be secured to rear seat and operated by a second person from this location.

If test and measuring instruments are operated from front passenger 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.

• If the engine is to be turned at starter speed without starting:

• Pull all 4-pin connectors -arrows- off ignition coils.

• Remove fuse for injection valves from fuse holder. Fuse assignment ⇒ Current flow diagrams, Electrical fault finding and Fitting locations