Cautions

WARNING:
When removing and installing the fuel pump or fuel level sensor from a filled or partially filled fuel tank:
^ Fuel tank must be no more than 2/3 full. Remove fuel if necessary using an approved fuel cart (e.g. VAG 1433A).
^ BEFORE beginning repairs, the suction pipe of an exhaust extraction system must be located near the fuel tank opening so that escaping fuel vapors can be immediately carried away.
^ If no exhaust extraction system is available, a radial fan (motor located outside airflow) with volume of at least 15 cubic m/hr (9 cfm) may be used.
^ Wear fuel-resistant gloves whenever working with open parts of the fuel system.

Be sure the ignition is switched OFF, when:
^ Disconnecting fuel injection system wiring
^ Connecting or disconnecting test equipment leads

BEFORE cranking the engine at starting RPM (such as for compression testing) disable the ignition and fuel injection systems:
^ Disconnect the ignition coil power output stage.
^ Disconnect harness connectors from all fuel injectors.
^ After the work is completed, erase Diagnostic Trouble Code (DTC) memory.