Vehicle Damage Warnings

WARNING! When removing and installing the fuel pump or fuel level sensor from a filled or partially filled fuel tank:
- Fuel supply lines are under pressure! Before removing, wrap a cloth around the connection. Then release pressure by carefully loosening line at connection.
- 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.


CAUTION: BEFORE disconnecting the battery:
- Stop the engine.
- Be sure the ignition is switched OFF (also applies when connecting the battery). Failure to do so may damage the Engine Control Module (ECM).
- Be sure of the proper radio code (for vehicles equipped with coded anti-theft radio).

Be sure the battery negative (-) cable is disconnected, when:
- Working on the electrical system
- Resistance (spot) welding or electric arc welding anywhere on the vehicle.

When connecting and disconnecting electrical test equipment (LED voltage tester, multimeter etc.):
- Be sure the ignition is switched OFF
- Use correct adapters from the VW 1594 connector test kit.