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Servicing Motronic fuel injection system
Safety precautions
To prevent injuries to persons and/or damage to the ignition system and fuel injection system, the following must be noted:
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◆ Always switch off the ignition before connecting or disconnecting ignition system wiring or tester cables.
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◆ To operate the engine at starting speed without actually starting it (for example, to check the compression), unplug the connector from the power output stage for the ignition coils and the connectors from the injectors.
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◆ For assisted starts with a rapid charging unit the maximum permissible voltage is 16.5 V and the maximum charging time is 1 minute.
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◆ Always switch off the ignition before washing the engine.
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◆ Always switch off the ignition before connecting or disconnecting the battery, otherwise the Motronic control unit may be damaged.
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◆ Vehicles that have an actual or suspected fault in the ignition system must not be towed unless the connector at the power output stage is unplugged.
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◆ Always use the adapter wiring set V.A.G 1594 for connecting test equipment.
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