Injection System

Safety precautions

WARNING: Fuel system is under pressure! Before opening the system place a cloth around the connection. Then release pressure by carefully loosening the connection.

To prevent injuries to persons and/or damage to the fuel injection and ignition system, the following must be observed:
^ For safety reasons the fuse No. 28 must be removed from the fuse holder before opening the fuel system, otherwise the fuel pump can be activated by the door contact switch.
^ Do not touch or disconnect ignition wiring when the engine is running or being turned at starter speed.
^ The ignition must be switched off before connecting or disconnecting the injection or ignition system wiring or tester cables.

CAUTION: When performing repair work, especially due to the confined conditions in the engine compartment, pay attention to the following:
^ Route all types of lines (e.g. for fuel, hydraulics, EVAP system, coolant, refrigerant, brake fluid and vacuum) as well as electrical wiring so that the original positions are restored.
^ Ensure sufficient clearance to all moving or hot components.

Observe following if test and measuring instruments are required during a road test:
^ Test and measuring instruments must be secured to the rear seat and operated by an assistant from this location.
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.
^ If the engine is to be turned at starter speed, without starting:

Engine code AEG





^ Disconnect 4-pin harness connector -1- from ignition coils power output stage -2-.





Engine codes AVH, AZG, BDC, BEV, BGD
^ Disconnect 6-pin connector from ignition coil with final output stage (arrow).





^ Remove fuse 32.

Note: Removing fuse 32 interrupts the voltage supply to the injectors.

^ Erase engine control module fault memory because pulling connectors off injector will have caused a fault to be recorded.