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Servicing Motronic injection system
Safety precautions
To prevent injuries to persons and/or damage to the fuel injection and ignition system, note the following points:
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◆ Always switch off the ignition before connecting or disconnecting injection or ignition system wiring or tester cables.
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◆ In order to run the engine at starting speed without actually starting it (for example, to test compression), unplug the connectors on the ignition coils and also the connectors on the injectors.
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◆ During some of the tests the control unit may identify and record faults. The fault memory should therefore be interrogated and (if necessary) erased after completing the tests and any repair work that may be required.
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◆ Always switch off the ignition before cleaning the engine.
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◆ Always switch off the ignition before connecting or disconnecting the battery, otherwise the engine control unit may be damaged.
Warning
Fuel system is under pressure. Before opening the system place a cloth around the connection. Then release pressure by carefully loosening the connection.
Note the following points if test equipment has to be used during a road test:
Warning
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◆ Test equipment must always be secured on the rear seat and operated from the rear seat by a second person.
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◆ If test equipment is operated from the front passenger seat, the occupant could be injured by the passenger's airbag in an accident.
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